[vm] Isolate ownership API

go/dart-isolate-ownership-api

Change-Id: Ia778a916de3fecec9f0aa1a5c8bc9fd7dd421267
Bug: https://github.com/dart-lang/native/issues/1908
TEST=runtime/vm/dart_api_impl_test.cc
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/407700
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>

runtime/include/dart_api.h

@@ -1707,8 +1707,6 @@ DART_EXPORT DART_API_WARN_UNUSED_RESULT bool Dart_RunLoopAsync(
     Dart_Port on_exit_port,
     char** error);
 
-/* TODO(turnidge): Should this be removed from the public api? */
-
 /**
  * Gets the main port id for the current isolate.
  */
@@ -1779,6 +1777,24 @@ DART_EXPORT Dart_Handle Dart_SendPortGetId(Dart_Handle port,
  */
 DART_EXPORT Dart_Handle Dart_SendPortGetIdEx(Dart_Handle port,
                                              Dart_PortEx* portex_id);
+
+/**
+ * Sets the owner thread of the current isolate to be the current thread.
+ *
+ * Requires there to be a current isolate, and that the isolate is unowned.
+ */
+DART_EXPORT void Dart_SetCurrentThreadOwnsIsolate(void);
+
+/**
+ * Returns whether the current thread owns the isolate that owns the given port.
+ *
+ * The port can be the isolate's main port, or any other port owned by the
+ * isolate.
+ *
+ * \param port_id The port to be checked.
+ */
+DART_EXPORT bool Dart_GetCurrentThreadOwnsIsolate(Dart_Port port);
+
 /*
  * ======
  * Scopes

runtime/include/dart_api_dl.h

@@ -96,6 +96,7 @@ typedef void (*Dart_NativeMessageHandler_DL)(Dart_Port_DL dest_port_id,
   F(Dart_ExitIsolate, void, (void))                                            \
   F(Dart_EnterIsolate, void, (Dart_Isolate))                                   \
   /* Dart_Port */                                                              \
+  F(Dart_GetMainPortId, Dart_Port, (void))                                     \
   F(Dart_Post, bool, (Dart_Port_DL port_id, Dart_Handle object))               \
   F(Dart_NewSendPort, Dart_Handle, (Dart_Port_DL port_id))                     \
   F(Dart_NewSendPortEx, Dart_Handle, (Dart_PortEx_DL portex_id))               \
@@ -103,6 +104,7 @@ typedef void (*Dart_NativeMessageHandler_DL)(Dart_Port_DL dest_port_id,
     (Dart_Handle port, Dart_Port_DL * port_id))                                \
   F(Dart_SendPortGetIdEx, Dart_Handle,                                         \
     (Dart_Handle port, Dart_PortEx_DL * portex_id))                            \
+  F(Dart_GetCurrentThreadOwnsIsolate, bool, (Dart_Port))                       \
   /* Scopes */                                                                 \
   F(Dart_EnterScope, void, (void))                                             \
   F(Dart_ExitScope, void, (void))                                              \

runtime/include/dart_version.h

@@ -11,6 +11,6 @@
 // On backwards compatible changes the minor version is increased.
 // The versioning covers the symbols exposed in dart_api_dl.h
 #define DART_API_DL_MAJOR_VERSION 2
-#define DART_API_DL_MINOR_VERSION 5
+#define DART_API_DL_MINOR_VERSION 6
 
 #endif /* RUNTIME_INCLUDE_DART_VERSION_H_ */ /* NOLINT */