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This commit is contained in:
Marc Alexander Lehmann 2011-08-03 15:31:23 +00:00
parent 073d7f16b4
commit 18fb146a43
1 changed files with 6 additions and 5 deletions
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11
ev.c
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@ -513,10 +513,11 @@ struct signalfd_siginfo
#define ECB_MEMORY_FENCE __sync_synchronize ()
#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
#elif _MSC_VER >= 1400 && 0 /* TODO: only true when using volatiles */
#define ECB_MEMORY_FENCE do { } while (0)
#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
#elif _MSC_VER >= 1400 /* VC++ 2005 */
#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
#elif defined(_WIN32)
#include <WinNT.h>
#define ECB_MEMORY_FENCE MemoryBarrier ()
@ -2619,7 +2620,7 @@ ev_run (EV_P_ int flags)
/* from now on, we want a pipe-wake-up */
pipe_write_wanted = 1;
ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
{