try_lock_mutexT_try_lock_mutexTryLockMutexTryLockMutextry_lock_mutex (算子)
名称
try_lock_mutexT_try_lock_mutexTryLockMutexTryLockMutextry_lock_mutex — Lock a mutex synchronization object.
签名
描述
try_lock_mutextry_lock_mutexTryLockMutexTryLockMutexTryLockMutextry_lock_mutex behaves identically to lock_mutexlock_mutexLockMutexLockMutexLockMutexlock_mutex, except
that it does not block the calling thread if the mutex is already locked by
another thread but returns immediately. The state of the mutex before trying
to lock it is returned in BusyBusyBusyBusybusybusy. 1 indicates that the mutex
was already locked before calling try_lock_mutextry_lock_mutexTryLockMutexTryLockMutexTryLockMutextry_lock_mutex, 0 that
the mutex was unlocked (signaled).
执行信息
- 多线程类型：独立（即使使用独占算子也能并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 未采用并行化处理。
参数
MutexHandleMutexHandleMutexHandleMutexHandlemutexHandlemutex_handle (输入控制) mutex → HMutex, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
Mutex synchronization object.
BusyBusyBusyBusybusybusy (输出控制) number → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Mutex already locked?
结果
If the mutex handle is valid, the operator try_lock_mutextry_lock_mutexTryLockMutexTryLockMutexTryLockMutextry_lock_mutex 返回 2 ( H_MSG_TRUE )。如有必要，则抛出异常。
可能的前趋
create_mutexcreate_mutexCreateMutexCreateMutexCreateMutexcreate_mutex
可能的后继
unlock_mutexunlock_mutexUnlockMutexUnlockMutexUnlockMutexunlock_mutex
另见
lock_mutexlock_mutexLockMutexLockMutexLockMutexlock_mutex
模块
基础