tbb::internal::semaphore Class Reference

Edsger Dijkstra's counting semaphore. More...

#include <semaphore.h>

Inheritance diagram for tbb::internal::semaphore:

Collaboration diagram for tbb::internal::semaphore:

Public Member Functions
	semaphore (int start_cnt_=0)
	ctor More...
	~semaphore ()
	dtor More...
void	P ()
	wait/acquire More...
void	V ()
	post/release More...

Private Member Functions
void	init_semaphore (int start_cnt_)
Private Member Functions inherited from tbb::internal::no_copy
	no_copy ()
	Allow default construction. More...

Private Attributes
sem_t	sem

Detailed Description

Edsger Dijkstra's counting semaphore.

Definition at line 98 of file semaphore.h.

Constructor & Destructor Documentation

semaphore()

tbb::internal::semaphore::semaphore ( int  start_cnt_ = 0 )

inline

ctor

Definition at line 101 of file semaphore.h.

References init_semaphore().

{ init_semaphore( start_cnt_ ); }

Here is the call graph for this function:

~semaphore()

tbb::internal::semaphore::~semaphore ( )

inline

dtor

Definition at line 104 of file semaphore.h.

References __TBB_ASSERT_EX.

                 {
        int ret = sem_destroy( &sem );
        __TBB_ASSERT_EX( !ret, NULL );
    }

Member Function Documentation

init_semaphore()

void tbb::internal::semaphore::init_semaphore ( int  start_cnt_ )

inlineprivate

Definition at line 117 of file semaphore.h.

References __TBB_ASSERT, __TBB_ASSERT_EX, h, lock, P(), s, and V().

Referenced by semaphore().

                                        {
        int ret = sem_init( &sem, /*shared among threads*/ 0, start_cnt_ );
        __TBB_ASSERT_EX( !ret, NULL );
    }

Here is the call graph for this function:

Here is the caller graph for this function:

P()

void tbb::internal::semaphore::P ( )

inline

wait/acquire

Definition at line 109 of file semaphore.h.

References __TBB_ASSERT.

Referenced by init_semaphore(), tbb::internal::input_buffer::sema_P(), and tbb::internal::concurrent_monitor::thread_context::~thread_context().

             {
        while( sem_wait( &sem )!=0 )
            __TBB_ASSERT( errno==EINTR, NULL );
    }

Here is the caller graph for this function:

V()

void tbb::internal::semaphore::V ( )

inline

post/release

Definition at line 114 of file semaphore.h.

Referenced by init_semaphore(), and tbb::internal::input_buffer::sema_V().

{ sem_post( &sem ); }

Here is the caller graph for this function:

Member Data Documentation

sem

sem_t tbb::internal::semaphore::sem

private

Definition at line 116 of file semaphore.h.

---

The documentation for this class was generated from the following file:

• semaphore.h