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atomic.h
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#ifndef SW_ATOMIC_H_ #define SW_ATOMIC_H_ #ifdef _WIN32 typedef int32_t sw_atomic_int32_t; typedef uint32_t sw_atomic_uint32_t; typedef int64_t sw_atomic_int64_t; typedef uint64_t sw_atomic_uint64_t; typedef sw_atomic_uint32_t sw_atomic_t; typedef sw_atomic_uint64_t sw_atomic_long_t; static inline sw_atomic_t sw_atomic_cmp_set(sw_atomic_t *lock, sw_atomic_t old, sw_atomic_t set) { if (*lock == old) { *lock = set; return 1; } return 0; } static inline sw_atomic_t sw_atomic_fetch_add(sw_atomic_t *value, sw_atomic_t add) { sw_atomic_t old; old = *value; *value += add; return old; } #define sw_memory_barrier() #define sw_atomic_cpu_pause() #else typedef volatile int32_t sw_atomic_int32_t; typedef volatile uint32_t sw_atomic_uint32_t; #ifdef __x86_64__ typedef volatile int64_t sw_atomic_int64_t; typedef volatile uint64_t sw_atomic_uint64_t; #endif #ifdef __x86_64__ typedef sw_atomic_int64_t sw_atomic_long_t; typedef sw_atomic_uint64_t sw_atomic_ulong_t; #else typedef sw_atomic_int32_t sw_atomic_long_t; typedef sw_atomic_uint32_t sw_atomic_ulong_t; #endif typedef sw_atomic_uint32_t sw_atomic_t; #define sw_atomic_cmp_set(lock, old, set) __sync_bool_compare_and_swap(lock, old, set) #define sw_atomic_fetch_add(value, add) __sync_fetch_and_add(value, add) #define sw_atomic_fetch_sub(value, sub) __sync_fetch_and_sub(value, sub) #define sw_atomic_memory_barrier() __sync_synchronize() #define sw_atomic_add_fetch(value, add) __sync_add_and_fetch(value, add) #define sw_atomic_sub_fetch(value, sub) __sync_sub_and_fetch(value, sub) #ifdef __arm__ #define sw_atomic_cpu_pause() __asm__ __volatile__ ("NOP"); #elif defined(__x86_64__) #define sw_atomic_cpu_pause() __asm__ __volatile__ ("pause") #else #define sw_atomic_cpu_pause() #endif #if 0 #define sw_spinlock_release(lock) __sync_lock_release(lock) #else #define sw_spinlock_release(lock) *(lock) = 0 #endif #endif #endif