APCu 中定义的lock相关的宏

apc_lock_api.h

PHP_APCU_API zend_bool apc_lock_init();
PHP_APCU_API void      apc_lock_cleanup();
/*
  The following functions should be self explanitory:
*/
PHP_APCU_API zend_bool apc_lock_create(apc_lock_t *lock);
PHP_APCU_API zend_bool apc_lock_rlock(apc_lock_t *lock);
PHP_APCU_API zend_bool apc_lock_wlock(apc_lock_t *lock);
PHP_APCU_API zend_bool apc_lock_runlock(apc_lock_t *lock);
PHP_APCU_API zend_bool apc_lock_wunlock(apc_lock_t *lock);
PHP_APCU_API void apc_lock_destroy(apc_lock_t *lock); /* }}} */

/* {{{ generic locking macros */
#define CREATE_LOCK(lock)     apc_lock_create(lock)
#define DESTROY_LOCK(lock)    apc_lock_destroy(lock)
#define WLOCK(lock)           { HANDLE_BLOCK_INTERRUPTIONS(); apc_lock_wlock(lock); }
#define WUNLOCK(lock)         { apc_lock_wunlock(lock); HANDLE_UNBLOCK_INTERRUPTIONS(); }
#define RLOCK(lock)           { HANDLE_BLOCK_INTERRUPTIONS(); apc_lock_rlock(lock); }
#define RUNLOCK(lock)         { apc_lock_runlock(lock); HANDLE_UNBLOCK_INTERRUPTIONS(); }
#define LOCK                  WLOCK
#define UNLOCK                WUNLOCK
/* }}} */

/* {{{ object locking macros */
#define APC_WLOCK(o)          WLOCK(&(o)->lock)
#define APC_LOCK              APC_WLOCK
#define APC_WUNLOCK(o)        WUNLOCK(&(o)->lock)
#define APC_UNLOCK            APC_WUNLOCK
#define APC_RLOCK(o)          RLOCK(&(o)->lock)
#define APC_RUNLOCK(o)        RUNLOCK(&(o)->lock) /* }}} */

/* atomic operations */
#if defined(APC_LOCK_SHARED)
# ifdef PHP_WIN32
#  ifdef _WIN64
#   define ATOMIC_INC(c, a) InterlockedIncrement64(&a)
#   define ATOMIC_DEC(c, a) InterlockedDecrement64(&a)
#  else
#   define ATOMIC_INC(c, a) InterlockedIncrement(&a)
#   define ATOMIC_DEC(c, a) InterlockedDecrement(&a)
#  endif
# else
#  define ATOMIC_INC(c, a) __sync_add_and_fetch(&a, 1)
#  define ATOMIC_DEC(c, a) __sync_sub_and_fetch(&a, 1)
# endif
#elif defined(APC_LOCK_RECURSIVE)
# define ATOMIC_INC(c, a) do { \
    if (apc_lock_wlock(&(c)->header->lock)) { \
        (a)++; \
        apc_lock_wunlock(&(c)->header->lock); \
    } \
} while(0)
# define ATOMIC_DEC(c, a) do { \
    if (apc_lock_wlock(&(c)->header->lock)) { \
        (a)--; \
        apc_lock_wunlock(&(c)->header->lock); \
    } \
} while(0)
#else
# define ATOMIC_INC(c, a) (a)++
# define ATOMIC_DEC(c, a) (a)--
#endif

#endif