参考redis官方文档分布式锁，使用Linux c开发完成。git链接：https://github.com/lusenoot/distlock
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To create an lock manager
API: distmutex_t *dist_mutex_init(const redisContext **ctx, size_t count, size_t vallen);
distmutex_t *mutex = dist_mutex_init(redisctx, ctx_count, 16);
Acquire a lock
API:
int dist_mutex_lock(distmutex_t *mutex, const char *key, int expiretime);
int dist_mutex_trylock(distmutex_t *mutex, const char *key, int expiretime, int retries);
int iret = dist_mutex_lock(mutex, "my_key_name", 10000);
if (iret != MUTEX_OK) {
printf("lock failed\n");
}
Or:
int iret = dist_mutex_trylock(mutex, "my_key_name", 10000, 3);
if (iret != MUTEX_OK) {
printf("lock failed\n");
}
Release a lock
API: int dist_mutex_unlock(distmutex_t *mutex, const char *key);
int iret = dist_mutex_unlock(mutex, "my_key_name");
if (iret != MUTEX_OK) {
printf("lock failed\n");
}
Get lock status
API: int dist_mutex_status(distmutex_t *mutex);
status: 0 for free, 1 for busy; but if mutex is NULL, return -2.
int status = dist_mutex_status(mutex);
Release lock manager
API: void dist_mutex_destroy(distmutex_t *mutex);
dist_mutex_destroy(mutex);
