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master
Marc Alexander Lehmann 2011-08-04 14:37:49 +00:00
parent 03bf9eca6e
commit 0aabc6139d
1 changed files with 41 additions and 18 deletions
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59
ev.c
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@ -554,15 +554,26 @@ struct signalfd_siginfo
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
#elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
|| defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \
|| defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
|| defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
#define ECB_MEMORY_FENCE \
do { \
int null = 0; \
__asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \
while (0)
#endif
#endif
#endif
#ifndef ECB_MEMORY_FENCE
#if ECB_GCC_VERSION(4,4)
#if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER)
#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 ); })
/*#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 /* VC++ 2005 */
#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
@ -571,26 +582,32 @@ struct signalfd_siginfo
#elif defined(_WIN32)
#include <WinNT.h>
#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
#endif
#endif
#ifndef ECB_MEMORY_FENCE
/*
* if you get undefined symbol references to pthread_mutex_lock,
* or failure to find pthread.h, then you should implement
* the ECB_MEMORY_FENCE operations for your cpu/compiler
* OR provide pthread.h and link against the posix thread library
* of your system.
*/
#include <pthread.h>
#define ECB_NEEDS_PTHREADS 1
#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
#if !ECB_AVOID_PTHREADS
/*
* if you get undefined symbol references to pthread_mutex_lock,
* or failure to find pthread.h, then you should implement
* the ECB_MEMORY_FENCE operations for your cpu/compiler
* OR provide pthread.h and link against the posix thread library
* of your system.
*/
#include <pthread.h>
#define ECB_NEEDS_PTHREADS 1
#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
#endif
#endif
#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
#endif
#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
#endif
@ -848,6 +865,12 @@ ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper ()
/* ECB.H END */
#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
# undef ECB_MEMORY_FENCE
# undef ECB_MEMORY_FENCE_ACQUIRE
# undef ECB_MEMORY_FENCE_RELEASE
#endif
#define expect_false(cond) ecb_expect_false (cond)
#define expect_true(cond) ecb_expect_true (cond)
#define noinline ecb_noinline
@ -1756,7 +1779,7 @@ evpipe_write (EV_P_ EV_ATOMIC_T *flag)
{
int old_errno;
pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
pipe_write_skipped = 0; /* just an optimisation, no fence needed */
old_errno = errno; /* save errno because write will clobber it */