diff options
Diffstat (limited to 'ev.c')
| -rw-r--r-- | ev.c | 59 |
1 files changed, 41 insertions, 18 deletions
@@ -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) + #endif +#endif - 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) +#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 */ |