turnidge@google.com
9ba5441c54
Review URL: http://codereview.chromium.org//8392044 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@781 260f80e4-7a28-3924-810f-c04153c831b5
74 lines
1.9 KiB
C++
74 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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#ifndef VM_MESSAGE_QUEUE_H_
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#define VM_MESSAGE_QUEUE_H_
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#include "include/dart_api.h"
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#include "vm/thread.h"
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namespace dart {
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class PortMessage {
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public:
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// A new message to be sent between two isolates. The data handed to this
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// message will be disposed by calling free() once the message object is
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// being destructed (after delivery or when the receiving port is closed).
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PortMessage(Dart_Port dest_port, Dart_Port reply_port, Dart_Message data)
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: next_(NULL),
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dest_port_(dest_port),
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reply_port_(reply_port),
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data_(data) {}
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~PortMessage() {
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free(data_);
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}
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Dart_Port dest_port() const { return dest_port_; }
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Dart_Port reply_port() const { return reply_port_; }
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Dart_Message data() const { return data_; }
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private:
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friend class MessageQueue;
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PortMessage* next_;
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Dart_Port dest_port_;
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Dart_Port reply_port_;
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Dart_Message data_;
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DISALLOW_COPY_AND_ASSIGN(PortMessage);
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};
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// There is a message queue per isolate.
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class MessageQueue {
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public:
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MessageQueue() : head_(NULL), tail_(NULL) {}
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~MessageQueue();
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void Enqueue(PortMessage* msg);
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// Gets the next message from the message queue, possibly blocking
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// if no message is available. 'millis' is a timeout in
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// milliseconds. If 'millis' is 0, then this means to block
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// indefinitely. May block if no message is available. May return
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// NULL even if 'millis' is 0 due to spurious wakeups.
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PortMessage* Dequeue(int64_t millis);
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void Flush(Dart_Port port);
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void FlushAll();
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private:
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friend class MessageQueueTestPeer;
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Monitor monitor_;
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PortMessage* head_;
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PortMessage* tail_;
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DISALLOW_COPY_AND_ASSIGN(MessageQueue);
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};
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} // namespace dart
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#endif // VM_MESSAGE_QUEUE_H_
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