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Initial Commit - Lesson 31 (Commit #1)

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Norman Lansing
2026-02-24 22:39:26 -05:00
commit 9591e7f503
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94
Plugins/GameLiftServerSDK/ThirdParty/concurrentqueue/benchmarks/tbb/semaphore.cpp vendored Normal file
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/*
Copyright 2005-2014 Intel Corporation. All Rights Reserved.
This file is part of Threading Building Blocks. Threading Building Blocks is free software;
you can redistribute it and/or modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation. Threading Building Blocks is
distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details. You should have received a copy of
the GNU General Public License along with Threading Building Blocks; if not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
As a special exception, you may use this file as part of a free software library without
restriction. Specifically, if other files instantiate templates or use macros or inline
functions from this file, or you compile this file and link it with other files to produce
an executable, this file does not by itself cause the resulting executable to be covered
by the GNU General Public License. This exception does not however invalidate any other
reasons why the executable file might be covered by the GNU General Public License.
*/
#include "semaphore.h"
#if __TBB_USE_SRWLOCK
#include "dynamic_link.h" // Refers to src/tbb, not include/tbb
#include "tbb_misc.h"
#endif
namespace tbb {
namespace internal {
// TODO: For new win UI port, we can use SRWLock API without dynamic_link etc.
#if __TBB_USE_SRWLOCK
static atomic<do_once_state> concmon_module_inited;
void WINAPI init_binsem_using_event( SRWLOCK* h_ )
{
srwl_or_handle* shptr = (srwl_or_handle*) h_;
shptr->h = CreateEventEx( NULL, NULL, 0, EVENT_ALL_ACCESS|SEMAPHORE_ALL_ACCESS );
}
void WINAPI acquire_binsem_using_event( SRWLOCK* h_ )
{
srwl_or_handle* shptr = (srwl_or_handle*) h_;
WaitForSingleObjectEx( shptr->h, INFINITE, FALSE );
}
void WINAPI release_binsem_using_event( SRWLOCK* h_ )
{
srwl_or_handle* shptr = (srwl_or_handle*) h_;
SetEvent( shptr->h );
}
static void (WINAPI *__TBB_init_binsem)( SRWLOCK* ) = (void (WINAPI *)(SRWLOCK*))&init_binsem_using_event;
static void (WINAPI *__TBB_acquire_binsem)( SRWLOCK* ) = (void (WINAPI *)(SRWLOCK*))&acquire_binsem_using_event;
static void (WINAPI *__TBB_release_binsem)( SRWLOCK* ) = (void (WINAPI *)(SRWLOCK*))&release_binsem_using_event;
//! Table describing the how to link the handlers.
static const dynamic_link_descriptor SRWLLinkTable[] = {
DLD(InitializeSRWLock, __TBB_init_binsem),
DLD(AcquireSRWLockExclusive, __TBB_acquire_binsem),
DLD(ReleaseSRWLockExclusive, __TBB_release_binsem)
};
inline void init_concmon_module()
{
__TBB_ASSERT( (uintptr_t)__TBB_init_binsem==(uintptr_t)&init_binsem_using_event, NULL );
if( dynamic_link( "Kernel32.dll", SRWLLinkTable, sizeof(SRWLLinkTable)/sizeof(dynamic_link_descriptor) ) ) {
__TBB_ASSERT( (uintptr_t)__TBB_init_binsem!=(uintptr_t)&init_binsem_using_event, NULL );
__TBB_ASSERT( (uintptr_t)__TBB_acquire_binsem!=(uintptr_t)&acquire_binsem_using_event, NULL );
__TBB_ASSERT( (uintptr_t)__TBB_release_binsem!=(uintptr_t)&release_binsem_using_event, NULL );
}
}
binary_semaphore::binary_semaphore() {
atomic_do_once( &init_concmon_module, concmon_module_inited );
__TBB_init_binsem( &my_sem.lock );
if( (uintptr_t)__TBB_init_binsem!=(uintptr_t)&init_binsem_using_event )
P();
}
binary_semaphore::~binary_semaphore() {
if( (uintptr_t)__TBB_init_binsem==(uintptr_t)&init_binsem_using_event )
CloseHandle( my_sem.h );
}
void binary_semaphore::P() { __TBB_acquire_binsem( &my_sem.lock ); }
void binary_semaphore::V() { __TBB_release_binsem( &my_sem.lock ); }
#endif /* __TBB_USE_SRWLOCK */
} // namespace internal
} // namespace tbb