如果线程尝试解锁未锁定的互斥对象或未锁定的互斥对象,那么会导致未定义的行为。 如果互斥对象类型为 PTHREAD_MUTEX_ERRORCHECK ,那么将提供错误检查。 如果线程尝试重新锁定其已锁定的互斥对象,那么将返回错误。 如果线程尝试解锁未锁定的互斥对象或解锁的互斥对象,那么将返回错误。 如果互斥对象类型为 PTHREAD_MUTEX...
pthread_mutex_unlock() was not successful.valueis set to indicate the error condition. Error Conditions Ifpthread_mutex_unlock() was not successful, the error condition returned usually indicates one of the following errors. Under some conditions, the value returned could indicate an error other th...
如果是不同线程请求,则在加锁线程解锁时重新竞争。// PTHREAD_MUTEX_ERRORCHECK_NP,检错锁,如果同一个线程请求同一个锁,则返回EDEADLK,否则与PTHREAD_MUTEX_TIMED_NP类型动作相同。这样就保证当不允许多次加锁时不会出现最简单情况下的死锁。//PTHREAD_MUTEX_ADAPTIVE_NP,适应锁,此锁在多核处理器下首先进行自旋...
break; /* Error checking mutex. */ case PTHREAD_MUTEX_ERRORCHECK_NP: /* Check whether we already hold the mutex. */ if (__builtin_expect (mutex->__data.__owner == id, 0)) return EDEADLK; /* FALLTHROUGH */ case PTHREAD_MUTEX_TIMED_NP: simple: /* Normal mutex. */ LLL_MUTEX...
/* Error checking mutex. */ case PTHREAD_MUTEX_ERRORCHECK_NP: /* Check whether we already hold the mutex. */ if (__builtin_expect (mutex->__data.__owner == id, 0)) return EDEADLK; /* FALLTHROUGH */ case PTHREAD_MUTEX_TIMED_NP: ...
ALOGE("%s: malloc error!\n", __func__);break; }/* skip already cached entries */snprintf(temp->entry.event_path,sizeof(temp->entry.event_path),"%s%s", INPUT_EVENT_DIR, item->d_name);if(lookup(NULL, temp->entry.event_path))continue;/* make sure we have access */fd = open(...
#include <pthread.h> pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t recmutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; pthread_mutex_t errchkmutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP; int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutex...
}else{intvalidity = lua_toboolean(L,3);if(validity)returnluaL_argerror(L,3,"a job can not be made valid"); dt_control_progress_destroy(darktable.control, progress);return0; } } 开发者ID:dtorop,项目名称:darktable,代码行数:25,代码来源:gui.c ...
= 0) { perror("pthread_mutex_unlock() error"); exit(2); } } main() { pthread_t thid; if (pthread_mutex_init(&mutex, NULL) != 0) { perror("pthread_mutex_init() error"); exit(3); } if (pthread_create(&thid, NULL, thread, NULL) != 0) { perror("pthread_create() ...
Error Codes Thepthread_mutex_trylockfunction will fail if: Thepthread_mutex_lock,pthread_mutex_trylockandpthread_mutex_unlockfunctions will fail if: Thepthread_mutex_lockfunction will fail if: Thepthread_mutex_unlockfunction will fail if: These functions will not return an error code of ...