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-rw-r--r--src/osd/osdsync.h12
1 files changed, 7 insertions, 5 deletions
diff --git a/src/osd/osdsync.h b/src/osd/osdsync.h
index 3a286b60afa..cd8a6604c21 100644
--- a/src/osd/osdsync.h
+++ b/src/osd/osdsync.h
@@ -136,16 +136,17 @@ public:
Return value:
- None
+ Whether or not the event was actually signalled (false if the event had already been signalled)
Notes:
All threads waiting for the event will be signalled.
-----------------------------------------------------------------------------*/
- void set()
+ bool set()
{
m_mutex.lock();
- if (m_signalled == false)
+ bool needs_signal = !m_signalled;
+ if (needs_signal)
{
m_signalled = true;
if (m_autoreset)
@@ -154,13 +155,14 @@ public:
m_cond.notify_all();
}
m_mutex.unlock();
+ return needs_signal;
}
private:
std::mutex m_mutex;
std::condition_variable m_cond;
- std::atomic<int32_t> m_autoreset;
- std::atomic<int32_t> m_signalled;
+ int32_t m_autoreset;
+ int32_t m_signalled;
};