This class provides a full specialization of SemaphoreImpl for pthreads. The implementation provided here defines an efficient proxy for the sem_t pthread type, and related operations.

Synopsis

Declared in <bslmt_semaphoreimpl_pthread.h>

template<>
class SemaphoreImpl<Platform::PosixSemaphore>;

Member Functions

Name

Description

SemaphoreImpl [constructor]

Create a semaphore initialized to the specified count. This method does not return normally unless there are sufficient system resources to construct the object.

~SemaphoreImpl [destructor]

Destroy a semaphore

getValue

Return the current value of this semaphore.

post

post overloads

tryWait

Decrement the count of this semaphore if it is positive and return 0. Return a non‐zero value otherwise.

wait

Block until the count of this semaphore is a positive value and atomically decrement it.

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