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tbb::internal::binary_semaphore Class Reference

binary_semaphore for concurrent monitor More...

#include <semaphore.h>

Inheritance diagram for tbb::internal::binary_semaphore:
Collaboration diagram for tbb::internal::binary_semaphore:

Public Member Functions

 binary_semaphore ()
 ctor
 
 ~binary_semaphore ()
 dtor
 
void P ()
 wait/acquire
 
void V ()
 post/release
 

Private Attributes

sem_t my_sem
 

Additional Inherited Members

- Private Member Functions inherited from tbb::internal::no_copy
 no_copy (const no_copy &)=delete
 
 no_copy ()=default
 

Detailed Description

binary_semaphore for concurrent monitor

Definition at line 222 of file semaphore.h.

Constructor & Destructor Documentation

◆ binary_semaphore()

tbb::internal::binary_semaphore::binary_semaphore ( )
inline

ctor

Definition at line 225 of file semaphore.h.

225 {
226 int ret = sem_init( &my_sem, /*shared among threads*/ 0, 0 );
227 __TBB_ASSERT_EX( !ret, NULL );
228 }
#define __TBB_ASSERT_EX(predicate, comment)
"Extended" version is useful to suppress warnings if a variable is only used with an assert
Definition tbb_stddef.h:167

References __TBB_ASSERT_EX, and my_sem.

◆ ~binary_semaphore()

tbb::internal::binary_semaphore::~binary_semaphore ( )
inline

dtor

Definition at line 230 of file semaphore.h.

230 {
231 int ret = sem_destroy( &my_sem );
232 __TBB_ASSERT_EX( !ret, NULL );
233 }

References __TBB_ASSERT_EX, and my_sem.

Referenced by tbb::internal::concurrent_monitor::thread_context::~thread_context().

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Member Function Documentation

◆ P()

void tbb::internal::binary_semaphore::P ( )
inline

wait/acquire

Definition at line 235 of file semaphore.h.

235 {
236 while( sem_wait( &my_sem )!=0 )
237 __TBB_ASSERT( errno==EINTR, NULL );
238 }
#define __TBB_ASSERT(predicate, comment)
No-op version of __TBB_ASSERT.
Definition tbb_stddef.h:165

References __TBB_ASSERT, and my_sem.

Referenced by tbb::internal::concurrent_monitor::commit_wait(), tbb::internal::concurrent_monitor::prepare_wait(), and tbb::internal::concurrent_monitor::thread_context::~thread_context().

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◆ V()

void tbb::internal::binary_semaphore::V ( )
inline

post/release

Definition at line 240 of file semaphore.h.

240{ sem_post( &my_sem ); }

References my_sem.

Referenced by tbb::internal::concurrent_monitor::abort_all_relaxed(), tbb::internal::concurrent_monitor::notify_all_relaxed(), tbb::internal::concurrent_monitor::notify_one_relaxed(), and tbb::internal::concurrent_monitor::notify_relaxed().

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Member Data Documentation

◆ my_sem

sem_t tbb::internal::binary_semaphore::my_sem
private

Definition at line 242 of file semaphore.h.

Referenced by binary_semaphore(), P(), V(), and ~binary_semaphore().


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

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