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| author | Ben Murdoch <benm@google.com> | 2009-08-11 17:01:47 +0100 |
|---|---|---|
| committer | Ben Murdoch <benm@google.com> | 2009-08-11 18:21:02 +0100 |
| commit | 0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5 (patch) | |
| tree | 2943df35f62d885c89d01063cc528dd73b480fea /JavaScriptCore/wtf/MessageQueue.h | |
| parent | 7e7a70bfa49a1122b2597a1e6367d89eb4035eca (diff) | |
| download | external_webkit-0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5.zip external_webkit-0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5.tar.gz external_webkit-0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5.tar.bz2 | |
Merge in WebKit r47029.
Diffstat (limited to 'JavaScriptCore/wtf/MessageQueue.h')
| -rw-r--r-- | JavaScriptCore/wtf/MessageQueue.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/JavaScriptCore/wtf/MessageQueue.h b/JavaScriptCore/wtf/MessageQueue.h index 9549f37..12291cc 100644 --- a/JavaScriptCore/wtf/MessageQueue.h +++ b/JavaScriptCore/wtf/MessageQueue.h @@ -45,11 +45,12 @@ namespace WTF { }; template<typename DataType> - class MessageQueue : Noncopyable { + class MessageQueue : public Noncopyable { public: - MessageQueue() : m_killed(false) {} + MessageQueue() : m_killed(false) { } void append(const DataType&); + bool appendAndCheckEmpty(const DataType&); void prepend(const DataType&); bool waitForMessage(DataType&); template<typename Predicate> @@ -81,6 +82,17 @@ namespace WTF { m_condition.signal(); } + // Returns true if the queue was empty before the item was added. + template<typename DataType> + inline bool MessageQueue<DataType>::appendAndCheckEmpty(const DataType& message) + { + MutexLocker lock(m_mutex); + bool wasEmpty = m_queue.isEmpty(); + m_queue.append(message); + m_condition.signal(); + return wasEmpty; + } + template<typename DataType> inline void MessageQueue<DataType>::prepend(const DataType& message) { |