sgjesse@google.com
3481c5661a
The native port callback is now passed the message as a decodes Dart_CMessage structure. The Dart_CMessage structure is allocated in a zone and the callback receiving it should expect the lifetime to be controlled by the caller. Added support for zones which do not require a current isolate. Changed the GrowableArray to support allocating in aprovided zone instead of the zone for the current isolate. R=turnidge@google.com, asiva@google.com BUG= TEST= Review URL: https://chromiumcodereview.appspot.com//9325022 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@4068 260f80e4-7a28-3924-810f-c04153c831b5
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/native_message_handler.h"
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#include "vm/dart_api_message.h"
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#include "vm/isolate.h"
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#include "vm/message.h"
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#include "vm/snapshot.h"
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#include "vm/thread.h"
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namespace dart {
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NativeMessageHandler::NativeMessageHandler(const char* name,
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Dart_NativeMessageHandler func)
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: name_(strdup(name)),
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func_(func) {
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// A NativeMessageHandler always has one live port.
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increment_live_ports();
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}
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NativeMessageHandler::~NativeMessageHandler() {
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free(name_);
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}
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#if defined(DEBUG)
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void NativeMessageHandler::CheckAccess() {
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ASSERT(Isolate::Current() == NULL);
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}
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#endif
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static uint8_t* zone_allocator(
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uint8_t* ptr, intptr_t old_size, intptr_t new_size) {
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ApiZone* zone = ApiNativeScope::Current()->zone();
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return reinterpret_cast<uint8_t*>(
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zone->Reallocate(reinterpret_cast<uword>(ptr), old_size, new_size));
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}
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static void RunWorker(uword parameter) {
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NativeMessageHandler* handler =
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reinterpret_cast<NativeMessageHandler*>(parameter);
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#if defined(DEBUG)
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handler->CheckAccess();
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#endif
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while (handler->HasLivePorts()) {
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Message* message = handler->queue()->Dequeue(0);
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if (message != NULL) {
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if (message->priority() >= Message::kOOBPriority) {
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// TODO(turnidge): Out of band messages will not go through
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// the regular message handler. Instead they will be
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// dispatched to special vm code. Implement.
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UNIMPLEMENTED();
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}
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// Enter a native scope for handling the message. This will create a
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// zone for allocating the objects for decoding the message.
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ApiNativeScope scope;
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int32_t length = reinterpret_cast<int32_t*>(
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message->data())[Snapshot::kLengthIndex];
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ApiMessageReader reader(message->data() + Snapshot::kHeaderSize,
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length,
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zone_allocator);
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Dart_CObject* object = reader.ReadMessage();
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(*handler->func())(message->dest_port(),
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message->reply_port(),
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object);
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delete message;
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}
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}
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}
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void NativeMessageHandler::StartWorker() {
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int result = Thread::Start(RunWorker, reinterpret_cast<uword>(this));
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if (result != 0) {
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FATAL1("Failed to start native message handler worker thread %d", result);
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}
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}
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} // namespace dart
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