Files
sdk/runtime/include/dart_api.h
T
cshapiro@google.com f4c5dd4db3 Implement prologue weak persistent handles.
Prologue weak persistent handles are similar to weak persistent
handles but exhibit different behavior during garbage collections that
invoke the prologue and epilogue callbacks.  While weak persistent
handles always weakly reference their referents, prologue weak
persistent handles weakly reference their referents only during a
garbage collection occurs that invokes the prologue and epilogue
callbacks.  During all other garbage collections, prologue weak
persistent handles strongly reference their referents.

Review URL: https://chromiumcodereview.appspot.com//9655011

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@5445 260f80e4-7a28-3924-810f-c04153c831b5
2012-03-13 23:41:59 +00:00

2062 lines
67 KiB
C
Executable File

// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef INCLUDE_DART_API_H_
#define INCLUDE_DART_API_H_
/** \mainpage Dart Embedding API Reference
*
* Dart is a class-based programming language for creating structured
* web applications. This reference describes the Dart embedding api,
* which is used to embed the Dart Virtual Machine within an
* application.
*
* This reference is generated from the header include/dart_api.h.
*/
#ifdef __cplusplus
#define DART_EXTERN_C extern "C"
#else
#define DART_EXTERN_C
#endif
#if defined(__CYGWIN__)
#error Tool chain and platform not supported.
#elif defined(_WIN32)
typedef signed __int8 int8_t;
typedef signed __int16 int16_t;
typedef signed __int32 int32_t;
typedef signed __int64 int64_t;
typedef unsigned __int8 uint8_t;
typedef unsigned __int16 uint16_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;
#if defined(DART_SHARED_LIB)
#define DART_EXPORT DART_EXTERN_C __declspec(dllexport)
#else
#define DART_EXPORT DART_EXTERN_C
#endif
#else
#include <inttypes.h>
#if __GNUC__ >= 4
#if defined(DART_SHARED_LIB)
#define DART_EXPORT DART_EXTERN_C __attribute__ ((visibility("default")))
#else
#define DART_EXPORT DART_EXTERN_C
#endif
#else
#error Tool chain not supported.
#endif
#endif
#include <assert.h>
// --- Handles ---
/**
* An object reference managed by the Dart VM garbage collector.
*
* Because the garbage collector may move objects, it is unsafe to
* refer to objects directly. Instead, we refer to objects through
* handles, which are known to the garbage collector and updated
* automatically when the object is moved. Handles should be passed
* by value (except in cases like out-parameters) and should never be
* allocated on the heap.
*
* Most functions in the Dart Embedding API return a handle. When a
* function completes normally, this will be a valid handle to an
* object in the Dart VM heap. This handle may represent the result of
* the operation or it may be a special valid handle used merely to
* indicate successful completion. Note that a valid handle may in
* some cases refer to the null object.
*
* When a function encounters a problem that prevents it from
* completing normally, it returns an error handle (See Dart_IsError).
* An error handle has an associated error message that gives more
* details about the problem (See Dart_GetError).
*
* When an unhandled exception occurs, it is returned as an error
* handle that has additional information about the exception (See
* Dart_ErrorHasException). This error handle retains information
* about the exception and the stack trace (See
* Dart_ErrorGetException, Dart_ErrorGetStacktrace,
* Dart_RethrowException).
*
* Local handles are allocated within the current scope (see
* Dart_EnterScope) and go away when the current scope exits. Unless
* otherwise indicated, callers should assume that all functions in
* the Dart embedding api return local handles.
*
* Persistent handles are allocated within the current isolate. They
* can be used to store objects across scopes. Persistent handles have
* the lifetime of the current isolate unless they are explicitly
* deallocated (see Dart_DeletePersistentHandle).
*/
typedef struct _Dart_Handle* Dart_Handle;
typedef void (*Dart_WeakPersistentHandleFinalizer)(Dart_Handle handle,
void* peer);
typedef void (*Dart_PeerFinalizer)(void* peer);
/**
* Is this an error handle?
*
* Requires there to be a current isolate.
*/
DART_EXPORT bool Dart_IsError(Dart_Handle handle);
/**
* Gets the error message from an error handle.
*
* Requires there to be a current isolate.
*
* \return A C string containing an error message if the handle is
* error. An empty C string ("") if the handle is valid. This C
* String is scope allocated and is only valid until the next call
* to Dart_ExitScope.
*/
DART_EXPORT const char* Dart_GetError(Dart_Handle handle);
/**
* Is this an error handle for an unhandled exception?
*/
DART_EXPORT bool Dart_ErrorHasException(Dart_Handle handle);
/**
* Gets the exception Object from an unhandled exception error handle.
*/
DART_EXPORT Dart_Handle Dart_ErrorGetException(Dart_Handle handle);
/**
* Gets the stack trace Object from an unhandled exception error handle.
*/
DART_EXPORT Dart_Handle Dart_ErrorGetStacktrace(Dart_Handle handle);
/**
* Produces an error handle with the provided error message.
*
* Requires there to be a current isolate.
*
* \param error A C string containing an error message.
*/
DART_EXPORT Dart_Handle Dart_Error(const char* format, ...);
/**
* Propagates an error.
*
* It only makes sense to call this function when there are dart
* frames on the stack. That is, this function should only be called
* in the C implementation of a native function which has been called
* from Dart code. If this function is called in the top-level
* embedder code, it will return an error, as there is no way to
* further propagate the error.
*
* The provided handle must be an error handle. (See Dart_IsError.)
*
* If the provided handle is an unhandled exception, this function
* will cause the unhandled exception to be rethrown. Otherwise, the
* error will be propagated to the caller, discarding any active dart
* frames up to the next C frame.
*
* \param An error handle.
*
* \return On success, this function does not return. On failure, an
* error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_PropagateError(Dart_Handle handle);
// Internal routine used for reporting error handles.
DART_EXPORT void _Dart_ReportErrorHandle(const char* file,
int line,
const char* handle_string,
const char* error);
// TODO(turnidge): Move DART_CHECK_VALID to some sort of dart_utils
// header instead of this header.
/**
* Aborts the process if 'handle' is an error handle.
*
* Provided for convenience.
*/
#define DART_CHECK_VALID(handle) \
if (Dart_IsError((handle))) { \
_Dart_ReportErrorHandle(__FILE__, __LINE__, \
#handle, Dart_GetError(handle)); \
}
/**
* Converts an object to a string.
*
* May generate an unhandled exception error.
*
* \return A handle to the converted string if no error occurs during
* the conversion. If an error does occur, an error handle is
* returned.
*/
DART_EXPORT Dart_Handle Dart_ToString(Dart_Handle object);
/**
* Checks if the two objects are the same object
*
* The result of the comparison is returned through the 'same'
* parameter. The return value itself is used to indicate success or
* failure, not identity.
*
* \param obj1 An object to be compared.
* \param obj2 An object to be compared.
* \param equal Returns whether the two objects are the same.
*
* \return A valid handle if no error occurs during the comparison.
*/
DART_EXPORT Dart_Handle Dart_IsSame(Dart_Handle obj1,
Dart_Handle obj2,
bool* same);
/**
* Allocates a persistent handle for an object.
*
* This handle has the lifetime of the current isolate unless it is
* explicitly deallocated by calling Dart_DeletePersistentHandle.
*
* Requires there to be a current isolate.
*/
DART_EXPORT Dart_Handle Dart_NewPersistentHandle(Dart_Handle object);
/**
* Deallocates a persistent handle.
*
* Requires there to be a current isolate.
*/
DART_EXPORT void Dart_DeletePersistentHandle(Dart_Handle object);
/**
* Allocates a weak persistent handle for an object.
*
* This handle has the lifetime of the current isolate unless it is
* explicitly deallocated by calling Dart_DeletePersistentHandle.
*
* Requires there to be a current isolate.
*
* \param object An object.
* \param peer A pointer to a native object or NULL. This value is
* provided to callback when it is invoked.
* \param callback A function pointer that will be invoked sometime
* after the object is garbage collected.
*
* \return Success if the weak persistent handle was
* created. Otherwise, returns an error.
*/
DART_EXPORT Dart_Handle Dart_NewWeakPersistentHandle(
Dart_Handle object,
void* peer,
Dart_WeakPersistentHandleFinalizer callback);
/**
* Is this object a weak persistent handle?
*
* Requires there to be a current isolate.
*/
DART_EXPORT bool Dart_IsWeakPersistentHandle(Dart_Handle object);
/**
* Allocates a prologue weak persistent handle for an object.
*
* Prologue weak persistent handles are similar to weak persistent
* handles but exhibit different behavior during garbage collections
* that invoke the prologue and epilogue callbacks. While weak
* persistent handles always weakly reference their referents,
* prologue weak persistent handles weakly reference their referents
* only during a garbage collection that invokes the prologue and
* epilogue callbacks. During all other garbage collections, prologue
* weak persistent handles strongly reference their referents.
*
* This handle has the lifetime of the current isolate unless it is
* explicitly deallocated by calling Dart_DeletePersistentHandle.
*
* Requires there to be a current isolate.
*
* \param object An object.
* \param peer A pointer to a native object or NULL. This value is
* provided to callback when it is invoked.
* \param callback A function pointer that will be invoked sometime
* after the object is garbage collected.
*
* \return Success if the prologue weak persistent handle was created.
* Otherwise, returns an error.
*/
DART_EXPORT Dart_Handle Dart_NewPrologueWeakPersistentHandle(
Dart_Handle object,
void* peer,
Dart_WeakPersistentHandleFinalizer callback);
/**
* Is this object a prologue weak persistent handle?
*
* Requires there to be a current isolate.
*/
DART_EXPORT bool Dart_IsPrologueWeakPersistentHandle(Dart_Handle object);
/**
* Constructs a set of weak references from the Cartesian product of
* the objects in the key set and the objects in values set.
*
* \param keys A set of object references. These references will be
* considered weak by the garbage collector.
* \param num_keys the number of objects in the keys set.
* \param values A set of object references. These references will be
* considered weak by garbage collector unless any object reference
* in 'keys' is found to be strong.
* \param num_values the size of the values set
*
* \return Success if the weak reference set could be created.
* Otherwise, returns an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewWeakReferenceSet(Dart_Handle* keys,
intptr_t num_keys,
Dart_Handle* values,
intptr_t num_values);
// --- Garbage Collection Callbacks --
/**
* Callbacks signal the beginning and end of a garbage collection.
*
* These signals are intended to be used by the embedder to manage the
* lifetime of native objects with a managed object peer.
*/
/**
* A callback invoked at the beginning of a garbage collection.
*/
typedef void (*Dart_GcPrologueCallback)();
/**
* A callback invoked at the end of a garbage collection.
*/
typedef void (*Dart_GcEpilogueCallback)();
/**
* Adds a garbage collection prologue callback.
*
* \param callback A function pointer to a prologue callback function.
* This function must not have been previously added as a prologue
* callback.
*
* \return Success if the callback was added. Otherwise, returns an
* error handle.
*/
DART_EXPORT Dart_Handle Dart_AddGcPrologueCallback(
Dart_GcPrologueCallback callback);
/**
* Removes a garbage collection prologue callback.
*
* \param callback A function pointer to a prologue callback function.
* This function must have been added as a prologue callback.
*
* \return Success if the callback was removed. Otherwise, returns an
* error handle.
*/
DART_EXPORT Dart_Handle Dart_RemoveGcPrologueCallback(
Dart_GcPrologueCallback callback);
/**
* Adds a garbage collection epilogue callback.
*
* \param callback A function pointer to an epilogue callback
* function. This function must not have been previously added as
* an epilogue callback.
*
* \return Success if the callback was added. Otherwise, returns an
* error handle.
*/
DART_EXPORT Dart_Handle Dart_AddGcEpilogueCallback(
Dart_GcEpilogueCallback callback);
/**
* Removes a garbage collection epilogue callback.
*
* \param callback A function pointer to an epilogue callback
* function. This function must have been added as an epilogue
* callback.
*
* \return Success if the callback was removed. Otherwise, returns an
* error handle.
*/
DART_EXPORT Dart_Handle Dart_RemoveGcEpilogueCallback(
Dart_GcEpilogueCallback callback);
// --- Initialization and Globals ---
/**
* An isolate creation and initialization callback function.
*
* This callback, provided by the embedder, is called when an isolate needs
* to be created. The callback should create an isolate and load the
* required scripts for execution.
*
* \param error A structure into which the embedder can place a
* C string containing an error message in the case of failures.
*
* \return The embedder returns false if the creation and initialization was not
* successful and true if successful. The embedder is responsible for
* maintaining consistency in the case of errors (e.g: isolate is created,
* but loading of scripts fails then the embedder should ensure that
* Dart_ShutdownIsolate is called on the isolate).
* In the case of errors the caller is responsible for freeing the buffer
* returned in error containing an error string.
*/
typedef bool (*Dart_IsolateCreateCallback)(const char* name_prefix,
void* callback_data,
char** error);
/**
* An isolate interrupt callback function.
*
* This callback, provided by the embedder, is called when an isolate
* is interrupted as a result of a call to Dart_InterruptIsolate().
* When the callback is called, Dart_CurrentIsolate can be used to
* figure out which isolate is being interrupted.
*
* \param current_isolate The isolate being interrupted.
*
* \return The embedder returns true if the isolate should continue
* execution. If the embedder returns false, the isolate will be
* unwound (currently unimplemented).
*/
typedef bool (*Dart_IsolateInterruptCallback)();
// TODO(turnidge): Define and implement unwinding.
/**
* Initializes the VM.
*
* \param create A function to be called during isolate creation.
* See Dart_IsolateCreateCallback.
* \param interrupt A function to be called when an isolate is interrupted.
* See Dart_IsolateInterruptCallback.
*
* \return True if initialization is successful.
*/
DART_EXPORT bool Dart_Initialize(Dart_IsolateCreateCallback create,
Dart_IsolateInterruptCallback interrupt);
/**
* Sets command line flags. Should be called before Dart_Initialize.
*
* \param argc The length of the arguments array.
* \param argv An array of arguments.
*
* \return True if VM flags set successfully.
*/
DART_EXPORT bool Dart_SetVMFlags(int argc, const char** argv);
/**
* Returns true if the named VM flag is set.
*/
DART_EXPORT bool Dart_IsVMFlagSet(const char* flag_name);
// --- Isolates ---
/**
* An isolate is the unit of concurrency in Dart. Each isolate has
* its own memory and thread of control. No state is shared between
* isolates. Instead, isolates communicate by message passing.
*
* Each thread keeps track of its current isolate, which is the
* isolate which is ready to execute on the current thread. The
* current isolate may be NULL, in which case no isolate is ready to
* execute. Most of the Dart apis require there to be a current
* isolate in order to function without error. The current isolate is
* set by any call to Dart_CreateIsolate or Dart_EnterIsolate.
*/
typedef struct _Dart_Isolate* Dart_Isolate;
/**
* Creates a new isolate. The new isolate becomes the current isolate.
*
* A snapshot can be used to restore the VM quickly to a saved state
* and is useful for fast startup. If snapshot data is provided, the
* isolate will be started using that snapshot data.
*
* Requires there to be no current isolate.
*
* \param snapshot A buffer containing a VM snapshot or NULL if no
* snapshot is provided.
*
* \return The new isolate is returned. May be NULL if an error
* occurs duing isolate initialization.
*/
DART_EXPORT Dart_Isolate Dart_CreateIsolate(const char* name_prefix,
const uint8_t* snapshot,
void* callback_data,
char** error);
// TODO(turnidge): Document behavior when there is already a current
// isolate.
/**
* Shuts down the current isolate. After this call, the current
* isolate is NULL.
*
* Requires there to be a current isolate.
*/
DART_EXPORT void Dart_ShutdownIsolate();
// TODO(turnidge): Document behavior when there is no current isolate.
/**
* Returns the current isolate. Will return NULL if there is no
* current isolate.
*/
DART_EXPORT Dart_Isolate Dart_CurrentIsolate();
/**
* Enters an isolate. After calling this function,
* the current isolate will be set to the provided isolate.
*
* Requires there to be no current isolate.
*/
DART_EXPORT void Dart_EnterIsolate(Dart_Isolate isolate);
// TODO(turnidge): Describe what happens if two threads attempt to
// enter the same isolate simultaneously. Check for this in the code.
// Describe whether isolates are allowed to migrate.
/**
* Exits an isolate. After this call, Dart_CurrentIsolate will
* return NULL.
*
* Requires there to be a current isolate.
*/
DART_EXPORT void Dart_ExitIsolate();
// TODO(turnidge): We don't want users of the api to be able to exit a
// "pure" dart isolate. Implement and document.
/**
* Creates a full snapshot of the current isolate heap.
*
* A full snapshot is a compact representation of the dart heap state and
* can be used for fast initialization of an isolate. A Snapshot of the heap
* can only be created before any dart code has executed.
*
* Requires there to be a current isolate.
*
* \param buffer Returns a pointer to a buffer containing the
* snapshot. This buffer is scope allocated and is only valid
* until the next call to Dart_ExitScope.
* \param size Returns the size of the buffer.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_CreateSnapshot(uint8_t** buffer,
intptr_t* size);
/**
* Creates a snapshot of the application script loaded in the isolate.
*
* A script snapshot can be used for implementing fast startup of applications
* (skips the script tokenizing and parsing process). A Snapshot of the script
* can only be created before any dart code has executed.
*
* Requires there to be a current isolate which already has loaded script.
*
* \param buffer Returns a pointer to a buffer containing
* the snapshot. This buffer is scope allocated and is only valid
* until the next call to Dart_ExitScope.
* \param size Returns the size of the buffer.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_CreateScriptSnapshot(uint8_t** buffer,
intptr_t* size);
/**
* Schedules an interrupt for the specified isolate.
*
* Note that the interrupt does not occur immediately. In fact, if
* 'isolate' does not execute any further Dart code, then the
* interrupt will not occur at all. If and when the isolate is
* interrupted, the isolate interrupt callback will be invoked with
* 'isolate' as the current isolate (see
* Dart_IsolateInterruptCallback).
*
* \param isolate The isolate to be interrupted.
*/
DART_EXPORT void Dart_InterruptIsolate(Dart_Isolate isolate);
// --- Messages and Ports ---
/**
* A port is used to send or receive inter-isolate messages
*/
typedef int64_t Dart_Port;
/**
* kIllegalPort is a port number guaranteed never to be associated
* with a valid port.
*/
const Dart_Port kIllegalPort = 0;
/**
* A message notification callback.
*
* This callback allows the embedder to provide an alternate wakeup
* mechanism for the delivery of inter-isolate messages. It is the
* responsibility of the embedder to call Dart_HandleMessage to
* process the message.
*/
typedef void (*Dart_MessageNotifyCallback)(Dart_Isolate dest_isolate);
/**
* Allows embedders to provide an alternative wakeup mechanism for the
* delivery of inter-isolate messages. This setting only applies to
* the current isolate.
*
* Most embedders will only call this function once, before isolate
* execution begins. If this function is called after isolate
* execution begins, the embedder is responsible for threading issues.
*/
DART_EXPORT void Dart_SetMessageNotifyCallback(
Dart_MessageNotifyCallback message_notify_callback);
// TODO(turnidge): Consider moving this to isolate creation so that it
// is impossible to mess up.
/**
* Handles the next pending message for the current isolate.
*
* May generate an unhandled exception error.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_HandleMessage();
/**
* Processes any incoming messages for the current isolate.
*
* This function may only be used when the embedder has not provided
* an alternate message delivery mechanism with
* Dart_SetMessageCallbacks. It is provided for convenience.
*
* This function waits for incoming messages for the current
* isolate. As new messages arrive, they are handled using
* Dart_HandleMessage. The routine exits when all ports to the
* current isolate are closed.
*
* \return A valid handle if the run loop exited successfully. If an
* exception or other error occurs while processing messages, an
* error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_RunLoop();
// TODO(turnidge): Should this be removed from the public api?
/**
* Gets the main port id for the current isolate.
*/
DART_EXPORT Dart_Port Dart_GetMainPortId();
/**
* Does the current isolate have live ReceivePorts?
*
* A ReceivePort is live when it has not been closed.
*/
DART_EXPORT bool Dart_HasLivePorts();
/**
* Posts a message for some isolate. The message is a serialized
* object.
*
* Requires there to be a current isolate.
*
* \param port The destination port.
* \param object An object from the current isolate.
*
* \return True if the message was posted.
*/
DART_EXPORT bool Dart_Post(Dart_Port port_id, Dart_Handle object);
// --- Message sending/receiving from native code ----
/**
* A Dart_CObject is used for representing Dart objects as native C
* data outside the Dart heap. These objects are totally detached from
* the Dart heap. Only a subset of the Dart objects have a
* representation as a Dart_CObject.
*/
struct Dart_CObject {
enum Type {
kNull = 0,
kBool,
kInt32,
kInt64,
kBigint,
kDouble,
kString,
kArray,
kByteArray,
kNumberOfTypes
};
Type type;
union {
bool as_bool;
int32_t as_int32;
int64_t as_int64;
double as_double;
char* as_string;
char* as_bigint;
struct {
int length;
Dart_CObject** values;
} as_array;
struct {
int length;
uint8_t* values;
} as_byte_array;
} value;
};
/**
* Posts a message on some port. The message will contain the
* Dart_CObject object graph rooted in 'message'.
*
* While the message is being sent the state of the graph of
* Dart_CObject structures rooted in 'message' should not be accessed,
* as the message generation will make temporary modifications to the
* data. When the message has been sent the graph will be fully
* restored.
*
* \param port_id The destination port.
* \param message The message to send.
*
* \return True if the message was posted.
*/
DART_EXPORT bool Dart_PostCObject(Dart_Port port_id, Dart_CObject* message);
/**
* A native message handler.
*
* This handler is associated with a native port by calling
* Dart_NewNativePort.
*
* The message received is decoded into the message structure. The
* lifetime of the message data is controlled by the caller. All the
* data references from the message are allocated by the caller and
* will be reclaimed when returning to it.
*/
typedef void (*Dart_NativeMessageHandler)(Dart_Port dest_port_id,
Dart_Port reply_port_id,
Dart_CObject* message);
/**
* Creates a new native port. When messages are received on this
* native port, then they will be dispatched to the provided native
* message handler.
*
* \param name The name of this port in debugging messages.
* \param handler The C handler to run when messages arrive on the port.
* \param handle_concurrently Is it okay to process requests on this
* native port concurrently?
*
* \return If successful, returns the port id for the native port. In
* case of error, returns kIllegalPort.
*/
DART_EXPORT Dart_Port Dart_NewNativePort(const char* name,
Dart_NativeMessageHandler handler,
bool handle_concurrently);
// TODO(turnidge): Currently handle_concurrently is ignored.
/**
* Closes the native port with the given id.
*
* The port must have been allocated by a call to Dart_NewNativePort.
*
* \param native_port_id The id of the native port to close.
*
* \return Returns true if the port was closed successfully.
*/
DART_EXPORT bool Dart_CloseNativePort(Dart_Port native_port_id);
/**
* Returns a new SendPort with the provided port id.
*/
DART_EXPORT Dart_Handle Dart_NewSendPort(Dart_Port port_id);
/**
* Gets the ReceivePort for the provided port id, creating it if necessary.
*
* Note that there is at most one ReceivePort for a given port id.
*/
DART_EXPORT Dart_Handle Dart_GetReceivePort(Dart_Port port_id);
// --- Scopes ----
/**
* Enters a new scope.
*
* All new local handles will be created in this scope. Additionally,
* some functions may return "scope allocated" memory which is only
* valid within this scope.
*
* Requires there to be a current isolate.
*/
DART_EXPORT void Dart_EnterScope();
/**
* Exits a scope.
*
* The previous scope (if any) becomes the current scope.
*
* Requires there to be a current isolate.
*/
DART_EXPORT void Dart_ExitScope();
/**
* The Dart VM uses "zone allocation" for temporary structures. Zones
* support very fast allocation of small chunks of memory. The chunks
* cannot be deallocated individually, but instead zones support
* deallocating all chunks in one fast operation.
*
* This function makes it possible for the embedder to allocate
* temporary data in the VMs zone allocator.
*
* Zone allocation is possible:
* 1. when inside a scope where local handles can be allocated
* 2. when processing a message from a native port in a native port
* handler
*
* All the memory allocated this way will be reclaimed either on the
* next call to Dart_ExitScope or when the native port handler exits.
*
* \param size Size of the memory to allocate.
*
* \return A pointer to the allocated memory. NULL if allocation
* failed. Failure might due to is no current VM zone.
*/
DART_EXPORT uint8_t* Dart_ScopeAllocate(intptr_t size);
// --- Objects ----
/**
* Returns the null object.
*
* Requires there to be a current isolate.
*
* \return A handle to the null object.
*/
DART_EXPORT Dart_Handle Dart_Null();
/**
* Is this object null?
*/
DART_EXPORT bool Dart_IsNull(Dart_Handle object);
/**
* Checks if the two objects are equal.
*
* The result of the comparison is returned through the 'equal'
* parameter. The return value itself is used to indicate success or
* failure, not equality.
*
* May generate an unhandled exception error.
*
* \param obj1 An object to be compared.
* \param obj2 An object to be compared.
* \param equal Returns the result of the equality comparison.
*
* \return A valid handle if no error occurs during the comparison.
*/
DART_EXPORT Dart_Handle Dart_ObjectEquals(Dart_Handle obj1,
Dart_Handle obj2,
bool* equal);
/**
* Is this object an instance of some type?
*
* The result of the test is returned through the 'instanceif' parameter.
* The return value itself is used to indicate success or failure.
*
* \param object An object.
* \param type A type.
* \param instanceof Return true if 'object' is an instance of type 'type'.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ObjectIsType(Dart_Handle object,
Dart_Handle type,
bool* instanceof);
// --- Numbers ----
/**
* Is this object a Number?
*/
DART_EXPORT bool Dart_IsNumber(Dart_Handle object);
// --- Integers ----
/**
* Is this object an Integer?
*/
DART_EXPORT bool Dart_IsInteger(Dart_Handle object);
/**
* Does this Integer fit into a 64-bit signed integer?
*
* \param integer An integer.
* \param fits Returns true if the integer fits into a 64-bit signed integer.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_IntegerFitsIntoInt64(Dart_Handle integer,
bool* fits);
/**
* Does this Integer fit into a 64-bit unsigned integer?
*
* \param integer An integer.
* \param fits Returns true if the integer fits into a 64-bit unsigned integer.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_IntegerFitsIntoUint64(Dart_Handle integer,
bool* fits);
/**
* Returns an Integer with the provided value.
*
* \param value The value of the integer.
*
* \return The Integer object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewInteger(int64_t value);
/**
* Returns an Integer with the provided value.
*
* \param value The value of the integer represented as a C string
* containing a hexadecimal number.
*
* \return The Integer object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewIntegerFromHexCString(const char* value);
/**
* Gets the value of an Integer.
*
* The integer must fit into a 64-bit signed integer, otherwise an error occurs.
*
* \param integer An Integer.
* \param value Returns the value of the Integer.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_IntegerToInt64(Dart_Handle integer,
int64_t* value);
/**
* Gets the value of an Integer.
*
* The integer must fit into a 64-bit unsigned integer, otherwise an
* error occurs.
*
* \param integer An Integer.
* \param value Returns the value of the Integer.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_IntegerToUint64(Dart_Handle integer,
uint64_t* value);
/**
* Gets the value of an integer as a hexadecimal C string.
*
* \param integer An Integer.
* \param value Returns the value of the Integer as a hexadecimal C
* string. This C string is scope allocated and is only valid until
* the next call to Dart_ExitScope.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_IntegerToHexCString(Dart_Handle integer,
const char** value);
// --- Booleans ----
/**
* Returns the True object.
*
* Requires there to be a current isolate.
*
* \return A handle to the True object.
*/
DART_EXPORT Dart_Handle Dart_True();
/**
* Returns the False object.
*
* Requires there to be a current isolate.
*
* \return A handle to the False object.
*/
DART_EXPORT Dart_Handle Dart_False();
/**
* Is this object a Boolean?
*/
DART_EXPORT bool Dart_IsBoolean(Dart_Handle object);
/**
* Returns a Boolean with the provided value.
*
* \param value true or false.
*
* \return The Boolean object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewBoolean(bool value);
/**
* Gets the value of a Boolean
*
* \param boolean_obj A Boolean
* \param value Returns the value of the Boolean.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_BooleanValue(Dart_Handle boolean_obj, bool* value);
// --- Doubles ---
/**
* Is this object a Double?
*/
DART_EXPORT bool Dart_IsDouble(Dart_Handle object);
/**
* Returns a Double with the provided value.
*
* \param value A double.
*
* \return The Double object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewDouble(double value);
/**
* Gets the value of a Double
*
* \param double_obj A Double
* \param value Returns the value of the Double.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_DoubleValue(Dart_Handle double_obj, double* value);
// --- Strings ---
/**
* Is this object a String?
*/
DART_EXPORT bool Dart_IsString(Dart_Handle object);
/**
* Is this object a String whose codepoints all fit into 8 bits?
*/
DART_EXPORT bool Dart_IsString8(Dart_Handle object);
/**
* Is this object a String whose codepoints all fit into 16 bits?
*/
DART_EXPORT bool Dart_IsString16(Dart_Handle object);
/**
* Gets the length of a String.
*
* \param str A String.
* \param length Returns the length of the String.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_StringLength(Dart_Handle str, intptr_t* length);
/**
* Returns a String built from the provided C string
*
* \param value A C String
*
* \return The String object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewString(const char* str);
/**
* Returns a String built from an array of 8-bit codepoints.
*
* \param value An array of 8-bit codepoints.
* \param length The length of the codepoints array.
*
* \return The String object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewString8(const uint8_t* codepoints,
intptr_t length);
/**
* Returns a String built from an array of 16-bit codepoints.
*
* \param value An array of 16-bit codepoints.
* \param length The length of the codepoints array.
*
* \return The String object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewString16(const uint16_t* codepoints,
intptr_t length);
/**
* Returns a String built from an array of 32-bit codepoints.
*
* \param value An array of 32-bit codepoints.
* \param length The length of the codepoints array.
*
* \return The String object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewString32(const uint32_t* codepoints,
intptr_t length);
/**
* Is this object an external String?
*
* An external String is a String which references a fixed array of
* codepoints which is external to the Dart heap.
*/
DART_EXPORT bool Dart_IsExternalString(Dart_Handle object);
/**
* Retrieves the peer pointer associated with an external String.
*/
DART_EXPORT Dart_Handle Dart_ExternalStringGetPeer(Dart_Handle object,
void** peer);
/**
* Returns a String which references an external array of 8-bit codepoints.
*
* \param value An array of 8-bit codepoints. This array must not move.
* \param length The length of the codepoints array.
* \param peer An external pointer to associate with this string.
* \param callback A callback to be called when this string is finalized.
*
* \return The String object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewExternalString8(const uint8_t* codepoints,
intptr_t length,
void* peer,
Dart_PeerFinalizer callback);
/**
* Returns a String which references an external array of 16-bit codepoints.
*
* \param value An array of 16-bit codepoints. This array must not move.
* \param length The length of the codepoints array.
* \param peer An external pointer to associate with this string.
* \param callback A callback to be called when this string is finalized.
*
* \return The String object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewExternalString16(const uint16_t* codepoints,
intptr_t length,
void* peer,
Dart_PeerFinalizer callback);
/**
* Returns a String which references an external array of 32-bit codepoints.
*
* \param value An array of 32-bit codepoints. This array must not move.
* \param length The length of the codepoints array.
* \param peer An external pointer to associate with this string.
* \param callback A callback to be called when this string is finalized.
*
* \return The String object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewExternalString32(const uint32_t* codepoints,
intptr_t length,
void* peer,
Dart_PeerFinalizer callback);
/**
* Gets the codepoints from a String.
*
* This function is only valid on strings for which Dart_IsString8 is
* true. Otherwise an error occurs.
*
* \param str A string.
* \param codepoints An array allocated by the caller, used to return
* the array of codepoints.
* \param length Used to pass in the length of the provided array.
* Used to return the length of the array which was actually used.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_StringGet8(Dart_Handle str,
uint8_t* codepoints,
intptr_t* length);
// TODO(turnidge): Rename to GetString8 to be consistent with the Is*
// and New* functions above?
/**
* Gets the codepoints from a String.
*
* This function is only valid on strings for which Dart_IsString8 or
* Dart_IsString16 is true. Otherwise an error occurs.
*
* \param str A string.
* \param codepoints An array allocated by the caller, used to return
* the array of codepoints.
* \param length Used to pass in the length of the provided array.
* Used to return the length of the array which was actually used.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_StringGet16(Dart_Handle str,
uint16_t* codepoints,
intptr_t* length);
/**
* Gets the codepoints from a String
*
* \param str A string.
* \param codepoints An array allocated by the caller, used to return
* the array of codepoints.
* \param length Used to pass in the length of the provided array.
* Used to return the length of the array which was actually used.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_StringGet32(Dart_Handle str,
uint32_t* codepoints,
intptr_t* length);
/**
* Gets the utf8 encoded representation of a String.
*
* \param str A string.
* \param utf8 Returns the String represented as a utf8 encoded C
* string. This C string is scope allocated and is only valid until
* the next call to Dart_ExitScope.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_StringToCString(Dart_Handle str,
const char** utf8);
// --- Lists ---
/**
* Is this object a List?
*/
DART_EXPORT bool Dart_IsList(Dart_Handle object);
/**
* Returns a List of the desired length.
*
* \param length The length of the list.
*
* \return The List object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewList(intptr_t length);
/**
* Gets the length of a List.
*
* May generate an unhandled exception error.
*
* \param list A List.
* \param length Returns the length of the List.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ListLength(Dart_Handle list, intptr_t* length);
/**
* Gets the Object at some index of a List.
*
* If the index is out of bounds, an error occurs.
*
* May generate an unhandled exception error.
*
* \param list A List.
* \param index A valid index into the List.
*
* \return The Object in the List at the specified index if no errors
* occurs. Otherwise returns an error handle.
*/
DART_EXPORT Dart_Handle Dart_ListGetAt(Dart_Handle list,
intptr_t index);
/**
* Sets the Object at some index of a List.
*
* If the index is out of bounds, an error occurs.
*
* May generate an unhandled exception error.
*
* \param array A List.
* \param index A valid index into the List.
* \param value The Object to put in the List.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ListSetAt(Dart_Handle list,
intptr_t index,
Dart_Handle value);
/**
* May generate an unhandled exception error.
*/
DART_EXPORT Dart_Handle Dart_ListGetAsBytes(Dart_Handle list,
intptr_t offset,
uint8_t* native_array,
intptr_t length);
/**
* May generate an unhandled exception error.
*/
DART_EXPORT Dart_Handle Dart_ListSetAsBytes(Dart_Handle list,
intptr_t offset,
uint8_t* native_array,
intptr_t length);
// --- Byte Arrays ---
/**
* Is this object a ByteArray?
*/
DART_EXPORT bool Dart_IsByteArray(Dart_Handle object);
/**
* Returns a ByteArray of the desired length.
*
* \param length The length of the array.
*
* \return The ByteArray object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewByteArray(intptr_t length);
/**
* Returns a ByteArray which references an external array of 8-bit bytes.
*
* \param value An array of 8-bit bytes. This array must not move.
* \param length The length of the array.
* \param peer An external pointer to associate with this byte array.
*
* \return The ByteArray object if no error occurs. Otherwise returns
* an error handle.
*/
DART_EXPORT Dart_Handle Dart_NewExternalByteArray(uint8_t* data,
intptr_t length,
void* peer,
Dart_PeerFinalizer callback);
/**
* Retrieves the peer pointer associated with an external ByteArray.
*/
DART_EXPORT Dart_Handle Dart_ExternalByteArrayGetPeer(Dart_Handle object,
void** peer);
/**
* Gets an int8_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the int8_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetInt8At(Dart_Handle array,
intptr_t offset,
int8_t* value);
/**
* Sets an int8_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The int8_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetInt8At(Dart_Handle array,
intptr_t offset,
int8_t value);
/**
* Gets a uint8_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the uint8_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetUint8At(Dart_Handle array,
intptr_t offset,
uint8_t* value);
/**
* Sets a uint8_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The uint8_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetUint8At(Dart_Handle array,
intptr_t offset,
uint8_t value);
/**
* Gets an int16_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the int16_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetInt16At(Dart_Handle array,
intptr_t offset,
int16_t* value);
/**
* Sets an int16_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The int16_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetInt16At(Dart_Handle array,
intptr_t offset,
int16_t value);
/**
* Gets a uint16_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the uint16_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetUint16At(Dart_Handle array,
intptr_t offset,
uint16_t* value);
/**
* Sets a uint16_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The uint16_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetUint16At(Dart_Handle array,
intptr_t offset,
uint16_t value);
/**
* Gets an int32_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the int32_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetInt32At(Dart_Handle array,
intptr_t offset,
int32_t* value);
/**
* Sets an int32_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The int32_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetInt32At(Dart_Handle array,
intptr_t offset,
int32_t value);
/**
* Gets a uint32_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the uint32_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetUint32At(Dart_Handle array,
intptr_t offset,
uint32_t* value);
/**
* Sets a uint32_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The uint32_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetUint32At(Dart_Handle array,
intptr_t offset,
uint32_t value);
/**
* Gets an int64_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the int64_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetInt64At(Dart_Handle array,
intptr_t offset,
int64_t* value);
/**
* Sets an int64_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The int64_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetInt64At(Dart_Handle array,
intptr_t offset,
int64_t value);
/**
* Gets a uint64_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the uint64_t.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetUint64At(Dart_Handle array,
intptr_t offset,
uint64_t* value);
/**
* Sets a uint64_t at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The uint64_t to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetUint64At(Dart_Handle array,
intptr_t offset,
uint64_t value);
/**
* Gets a float at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the float.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetFloat32At(Dart_Handle array,
intptr_t offset,
float* value);
/**
* Sets a float at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The float to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetFloat32At(Dart_Handle array,
intptr_t offset,
float value);
/**
* Gets a double from some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the List.
* \param value Returns the value of the double.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArrayGetFloat64At(Dart_Handle array,
intptr_t offset,
double* value);
/**
* Sets a double at some byte offset in a ByteArray.
*
* If the byte offset is out of bounds, an error occurs.
*
* \param array A ByteArray.
* \param offset A valid byte offset into the ByteArray.
* \param value The double to put into the ByteArray.
*
* \return A valid handle if no error occurs during the operation.
*/
DART_EXPORT Dart_Handle Dart_ByteArraySetFloat64At(Dart_Handle array,
intptr_t offset,
double value);
// --- Closures ---
/**
* Is this object a Closure?
*/
DART_EXPORT bool Dart_IsClosure(Dart_Handle object);
/**
* Invokes a Closure with the given arguments.
*
* May generate an unhandled exception error.
*
* \return If no error occurs during execution, then the result of
* invoking the closure is returned. If an error occurs during
* execution, then an error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_InvokeClosure(Dart_Handle closure,
int number_of_arguments,
Dart_Handle* arguments);
// DEPRECATED: The API below is a temporary hack.
DART_EXPORT int64_t Dart_ClosureSmrck(Dart_Handle object);
// DEPRECATED: The API below is a temporary hack.
DART_EXPORT void Dart_ClosureSetSmrck(Dart_Handle object, int64_t value);
// --- Methods and Fields ---
/**
* Invokes a method or function.
*
* The 'target' parameter may be an object, class, or library. If
* 'target' is an object, then this function will invoke an instance
* method. If 'target' is a class, then this function will invoke a
* static method. If 'target' is a library, then this function will
* invoke a top-level function from that library.
*
* This function ignores visibility (leading underscores in names).
*
* May generate an unhandled exception error.
*
* \param target An object, class, or library.
* \param name The name of the function or method to invoke.
* \param number_of_arguments Size of the arguments array.
* \param arguments An array of arguments to the function.
*
* \return If the function or method is called and completes
* successfully, then the return value is returned. If an error
* occurs during execution, then an error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_Invoke(Dart_Handle target,
Dart_Handle name,
int number_of_arguments,
Dart_Handle* arguments);
/**
* DEPRECATED: Use Dart_Invoke instead.
*
* Invokes a static method with the given arguments.
*
* May generate an unhandled exception error.
*
* \return If no error occurs during execution, then the result of
* invoking the method is returned. If an error occurs during
* execution, then an error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_InvokeStatic(Dart_Handle library,
Dart_Handle class_name,
Dart_Handle function_name,
int number_of_arguments,
Dart_Handle* arguments);
/**
* DEPRECATED: Use Dart_Invoke instead.
*
* Invokes an instance method with the given arguments.
*
* May generate an unhandled exception error.
*
* \return If no error occurs during execution, then the result of
* invoking the method is returned. If an error occurs during
* execution, then an error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_InvokeDynamic(Dart_Handle receiver,
Dart_Handle function_name,
int number_of_arguments,
Dart_Handle* arguments);
/**
* Gets the value of a field.
*
* The 'container' parameter may be an object, class, or library. If
* 'container' is an object, then this function will access an
* instance field. If 'container' is a class, then this function will
* access a static field. If 'container' is a library, then this
* function will access a top-level variable.
*
* This function ignores field visibility (leading underscores in names).
*
* May generate an unhandled exception error.
*
* \param container An object, class, or library.
* \param name A field name.
*
* \return If no error occurs, then the value of the field is
* returned. Otherwise an error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_GetField(Dart_Handle container,
Dart_Handle name);
/**
* Sets the value of a field.
*
* The 'container' parameter may actually be an object, class, or
* library. If 'container' is an object, then this function will
* access an instance field. If 'container' is a class, then this
* function will access a static field. If 'container' is a library,
* then this function will access a top-level variable.
*
* This function ignores field visibility (leading underscores in names).
*
* May generate an unhandled exception error.
*
* \param container An object, class, or library.
* \param name A field name.
* \param value The new field value.
*
* \return A valid handle if no error occurs.
*/
DART_EXPORT Dart_Handle Dart_SetField(Dart_Handle container,
Dart_Handle name,
Dart_Handle value);
/**
* DEPRECATED: Use Dart_SetField/Dart_GetField instead.
*
* Gets the value of a static field.
*
* May generate an unhandled exception error.
*
* \return If no error occurs, then the value of the field is
* returned. Otherwise an error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_GetStaticField(Dart_Handle cls,
Dart_Handle name);
/**
* DEPRECATED: Use Dart_SetField/Dart_GetField instead.
*
* Sets the value of a static field.
*
* May generate an unhandled exception error.
*
* \return A valid handle if no error occurs.
*/
DART_EXPORT Dart_Handle Dart_SetStaticField(Dart_Handle cls,
Dart_Handle name,
Dart_Handle value);
/**
* DEPRECATED: Use Dart_SetField/Dart_GetField instead.
*
* Gets the value of an instance field.
*
* May generate an unhandled exception error.
*
* \return If no error occurs, then the value of the field is
* returned. Otherwise an error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_GetInstanceField(Dart_Handle obj,
Dart_Handle name);
/**
* DEPRECATED: Use Dart_SetField/Dart_GetField instead.
*
* Sets the value of an instance field.
*
* May generate an unhandled exception error.
*
* \return A valid handle if no error occurs.
*/
DART_EXPORT Dart_Handle Dart_SetInstanceField(Dart_Handle obj,
Dart_Handle name,
Dart_Handle value);
/**
* Creates a native wrapper class.
*
* TODO(turnidge): Document.
*/
DART_EXPORT Dart_Handle Dart_CreateNativeWrapperClass(Dart_Handle library,
Dart_Handle class_name,
int field_count);
/**
* Gets the value of a native field.
*
* TODO(turnidge): Document.
*/
DART_EXPORT Dart_Handle Dart_GetNativeInstanceField(Dart_Handle obj,
int index,
intptr_t* value);
/**
* Sets the value of a native field.
*
* TODO(turnidge): Document.
*/
DART_EXPORT Dart_Handle Dart_SetNativeInstanceField(Dart_Handle obj,
int index,
intptr_t value);
// --- Exceptions ----
/**
* Throws an exception.
*
* Throws an exception, unwinding all dart frames on the stack. If
* successful, this function does not return. Note that this means
* that the destructors of any stack-allocated C++ objects will not be
* called. If there are no Dart frames on the stack, an error occurs.
*
* \return An error handle if the exception was not thrown.
* Otherwise the function does not return.
*/
DART_EXPORT Dart_Handle Dart_ThrowException(Dart_Handle exception);
/**
* Rethrows an exception.
*
* Rethrows an exception, unwinding all dart frames on the stack. If
* successful, this function does not return. Note that this means
* that the destructors of any stack-allocated C++ objects will not be
* called. If there are no Dart frames on the stack, an error occurs.
*
* \return An error handle if the exception was not thrown.
* Otherwise the function does not return.
*/
DART_EXPORT Dart_Handle Dart_RethrowException(Dart_Handle exception,
Dart_Handle stacktrace);
// --- Native functions ---
/**
* The arguments to a native function.
*
* This object is passed to a native function to represent its
* arguments and return value. It allows access to the arguments to a
* native function by index. It also allows the return value of a
* native function to be set.
*/
typedef struct _Dart_NativeArguments* Dart_NativeArguments;
/**
* Gets the native argument at some index.
*/
DART_EXPORT Dart_Handle Dart_GetNativeArgument(Dart_NativeArguments args,
int index);
// TODO(turnidge): Specify the behavior of an out-of-bounds access.
/**
* Gets the number of native arguments.
*/
DART_EXPORT int Dart_GetNativeArgumentCount(Dart_NativeArguments args);
/**
* Sets the return value for a native function.
*/
DART_EXPORT void Dart_SetReturnValue(Dart_NativeArguments args,
Dart_Handle retval);
/**
* A native function.
*/
typedef void (*Dart_NativeFunction)(Dart_NativeArguments arguments);
/**
* Native entry resolution callback.
*
* For libraries and scripts which have native functions, the embedder
* can provide a native entry resolver. This callback is used to map a
* name/arity to a Dart_NativeFunction. If no function is found, the
* callback should return NULL.
*
* See Dart_SetNativeResolver.
*/
typedef Dart_NativeFunction (*Dart_NativeEntryResolver)(Dart_Handle name,
int num_of_arguments);
// TODO(turnidge): Consider renaming to NativeFunctionResolver or
// NativeResolver.
// --- Scripts and Libraries ---
// TODO(turnidge): Finish documenting this section.
typedef enum {
kLibraryTag = 0,
kImportTag,
kSourceTag,
kCanonicalizeUrl
} Dart_LibraryTag;
// TODO(turnidge): Document.
typedef Dart_Handle (*Dart_LibraryTagHandler)(Dart_LibraryTag tag,
Dart_Handle library,
Dart_Handle url,
Dart_Handle import_map);
/**
* Loads the root script for the current isolate.
*
* TODO(turnidge): Document.
*/
DART_EXPORT Dart_Handle Dart_LoadScript(Dart_Handle url,
Dart_Handle source,
Dart_LibraryTagHandler handler,
Dart_Handle import_map);
/**
* Loads the root script for current isolate from a snapshot.
*
* \param buffer A buffer which contains a snapshot of the script.
*
* \return If no error occurs, the Library object corresponding to the root
* script is returned. Otherwise an error handle is returned.
**/
DART_EXPORT Dart_Handle Dart_LoadScriptFromSnapshot(const uint8_t* buffer);
/**
* Forces all loaded classes and functions to be compiled eagerly in
* the current isolate..
*
* TODO(turnidge): Document.
*/
DART_EXPORT Dart_Handle Dart_CompileAll();
/**
* Is this object a Library?
*/
DART_EXPORT bool Dart_IsLibrary(Dart_Handle object);
/**
* Lookup a class by name from a Library.
*
* \return If no error occurs, the Library is returned. Otherwise an
* error handle is returned.
*/
DART_EXPORT Dart_Handle Dart_GetClass(Dart_Handle library, Dart_Handle name);
// TODO(turnidge): Consider returning Dart_Null() when the class is
// not found to distinguish that from a true error case.
DART_EXPORT Dart_Handle Dart_LibraryUrl(Dart_Handle library);
DART_EXPORT Dart_Handle Dart_LookupLibrary(Dart_Handle url);
// TODO(turnidge): Consider returning Dart_Null() when the library is
// not found to distinguish that from a true error case.
DART_EXPORT Dart_Handle Dart_LoadLibrary(Dart_Handle url,
Dart_Handle source,
Dart_Handle import_map);
DART_EXPORT Dart_Handle Dart_LibraryImportLibrary(Dart_Handle library,
Dart_Handle import);
DART_EXPORT Dart_Handle Dart_LoadSource(Dart_Handle library,
Dart_Handle url,
Dart_Handle source);
// TODO(turnidge): Rename to Dart_LibraryLoadSource?
/**
* Sets the callback used to resolve native functions for a library.
*
* \param library A library.
* \param resolver A native entry resolver.
*
* \return A valid handle if the native resolver was set successfully.
*/
DART_EXPORT Dart_Handle Dart_SetNativeResolver(
Dart_Handle library,
Dart_NativeEntryResolver resolver);
// TODO(turnidge): Rename to Dart_LibrarySetNativeResolver?
// --- Profiling support ----
// External pprof support for gathering and dumping symbolic
// information that can be used for better profile reports for
// dynamically generated code.
DART_EXPORT void Dart_InitPprofSupport();
DART_EXPORT void Dart_GetPprofSymbolInfo(void** buffer, int* buffer_size);
#endif // INCLUDE_DART_API_H_