turnidge@google.com
9d72035ce5
each isolate or native port had a dedicated thread. Refactored the MessageHandler api... - Added a Run function to allow a MessageHandler to run on a ThreadPool. These functions take a start and end callback to allow for isolate initialization and shutdown. - Made the queue private to the MessageHandler and moved all message processing code inside the MessageHandler (got rid of all of the different flavors of RunLoop). This helps remove some code duplication and hides the details of how messages are handled. - Moved all locking and notification out of MessageQueue and moved it up to MessageHandler. Moved OOB support out of MessageQueue and up to MessageHandler. These changes make the MessageQueue much simpler. - Refactored native port and isolate MessageHandlers to share more code. - Improved --trace_isolates output. - Added tests for MessageHandler. Refactored lib/isolate code... - Use the new MessageHandler::Run api. - Got rid of the LongJump stuff in RunIsolate. No longer needed. - Use the new StartIsolateScope/SwitchIsolateScope to make the code less verbose and less error-prone. - Store top-level isolate errors in the sticky_error. Added StartIsolateScope/SwitchIsolateScope classes. Review URL: https://chromiumcodereview.appspot.com//9924015 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@6762 260f80e4-7a28-3924-810f-c04153c831b5
96 lines
1.9 KiB
C++
96 lines
1.9 KiB
C++
// Copyright (c) 2011, 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/message.h"
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namespace dart {
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DECLARE_FLAG(bool, trace_isolates);
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MessageQueue::MessageQueue() {
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head_ = NULL;
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tail_ = NULL;
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}
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MessageQueue::~MessageQueue() {
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// Ensure that all pending messages have been released.
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#if defined(DEBUG)
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ASSERT(head_ == NULL);
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#endif
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}
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void MessageQueue::Enqueue(Message* msg) {
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// Make sure messages are not reused.
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ASSERT(msg->next_ == NULL);
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if (head_ == NULL) {
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// Only element in the queue.
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ASSERT(tail_ == NULL);
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head_ = msg;
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tail_ = msg;
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} else {
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ASSERT(tail_ != NULL);
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// Append at the tail.
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tail_->next_ = msg;
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tail_ = msg;
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}
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}
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Message* MessageQueue::Dequeue() {
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Message* result = head_;
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if (result != NULL) {
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head_ = result->next_;
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// The following update to tail_ is not strictly needed.
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if (head_ == NULL) {
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tail_ = NULL;
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}
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#if defined(DEBUG)
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result->next_ = result; // Make sure to trigger ASSERT in Enqueue.
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#endif // DEBUG
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return result;
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}
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return NULL;
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}
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void MessageQueue::Flush(Dart_Port port) {
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Message* cur = head_;
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Message* prev = NULL;
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while (cur != NULL) {
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Message* next = cur->next_;
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// If the message matches, then remove it from the queue and delete it.
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if (cur->dest_port() == port) {
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if (prev != NULL) {
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prev->next_ = next;
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} else {
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head_ = next;
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}
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delete cur;
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} else {
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// Move prev forward.
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prev = cur;
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}
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// Advance to the next message in the queue.
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cur = next;
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}
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tail_ = prev;
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}
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void MessageQueue::FlushAll() {
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Message* cur = head_;
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head_ = NULL;
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tail_ = NULL;
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while (cur != NULL) {
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Message* next = cur->next_;
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delete cur;
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cur = next;
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}
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}
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} // namespace dart
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