| /* |
| Copyright 2005-2010 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 "tbb/recursive_mutex.h" |
| #include "itt_notify.h" |
| |
| namespace tbb { |
| |
| void recursive_mutex::scoped_lock::internal_acquire( recursive_mutex& m ) { |
| #if _WIN32||_WIN64 |
| switch( m.state ) { |
| case INITIALIZED: |
| // since we cannot look into the internal of the CriticalSection object |
| // we won't know how many times the lock has been acquired, and thus |
| // we won't know when we may safely set the state back to INITIALIZED |
| // if we change the state to HELD as in mutex.cpp. thus, we won't change |
| // the state for recursive_mutex |
| EnterCriticalSection( &m.impl ); |
| break; |
| case DESTROYED: |
| __TBB_ASSERT(false,"recursive_mutex::scoped_lock: mutex already destroyed"); |
| break; |
| default: |
| __TBB_ASSERT(false,"recursive_mutex::scoped_lock: illegal mutex state"); |
| break; |
| } |
| #else |
| int error_code = pthread_mutex_lock(&m.impl); |
| __TBB_ASSERT_EX(!error_code,"recursive_mutex::scoped_lock: pthread_mutex_lock failed"); |
| #endif /* _WIN32||_WIN64 */ |
| my_mutex = &m; |
| } |
| |
| void recursive_mutex::scoped_lock::internal_release() { |
| __TBB_ASSERT( my_mutex, "recursive_mutex::scoped_lock: not holding a mutex" ); |
| #if _WIN32||_WIN64 |
| switch( my_mutex->state ) { |
| case INITIALIZED: |
| LeaveCriticalSection( &my_mutex->impl ); |
| break; |
| case DESTROYED: |
| __TBB_ASSERT(false,"recursive_mutex::scoped_lock: mutex already destroyed"); |
| break; |
| default: |
| __TBB_ASSERT(false,"recursive_mutex::scoped_lock: illegal mutex state"); |
| break; |
| } |
| #else |
| int error_code = pthread_mutex_unlock(&my_mutex->impl); |
| __TBB_ASSERT_EX(!error_code, "recursive_mutex::scoped_lock: pthread_mutex_unlock failed"); |
| #endif /* _WIN32||_WIN64 */ |
| my_mutex = NULL; |
| } |
| |
| bool recursive_mutex::scoped_lock::internal_try_acquire( recursive_mutex& m ) { |
| #if _WIN32||_WIN64 |
| switch( m.state ) { |
| case INITIALIZED: |
| break; |
| case DESTROYED: |
| __TBB_ASSERT(false,"recursive_mutex::scoped_lock: mutex already destroyed"); |
| break; |
| default: |
| __TBB_ASSERT(false,"recursive_mutex::scoped_lock: illegal mutex state"); |
| break; |
| } |
| #endif /* _WIN32||_WIN64 */ |
| bool result; |
| #if _WIN32||_WIN64 |
| result = TryEnterCriticalSection(&m.impl)!=0; |
| #else |
| result = pthread_mutex_trylock(&m.impl)==0; |
| #endif /* _WIN32||_WIN64 */ |
| if( result ) |
| my_mutex = &m; |
| return result; |
| } |
| |
| void recursive_mutex::internal_construct() { |
| #if _WIN32||_WIN64 |
| InitializeCriticalSection(&impl); |
| state = INITIALIZED; |
| #else |
| pthread_mutexattr_t mtx_attr; |
| int error_code = pthread_mutexattr_init( &mtx_attr ); |
| if( error_code ) |
| tbb::internal::handle_perror(error_code,"recursive_mutex: pthread_mutexattr_init failed"); |
| |
| pthread_mutexattr_settype( &mtx_attr, PTHREAD_MUTEX_RECURSIVE ); |
| error_code = pthread_mutex_init( &impl, &mtx_attr ); |
| if( error_code ) |
| tbb::internal::handle_perror(error_code,"recursive_mutex: pthread_mutex_init failed"); |
| pthread_mutexattr_destroy( &mtx_attr ); |
| #endif /* _WIN32||_WIN64*/ |
| ITT_SYNC_CREATE(&impl, _T("tbb::recursive_mutex"), _T("")); |
| } |
| |
| void recursive_mutex::internal_destroy() { |
| #if _WIN32||_WIN64 |
| switch( state ) { |
| case INITIALIZED: |
| DeleteCriticalSection(&impl); |
| break; |
| case DESTROYED: |
| __TBB_ASSERT(false,"recursive_mutex: already destroyed"); |
| break; |
| default: |
| __TBB_ASSERT(false,"recursive_mutex: illegal state for destruction"); |
| break; |
| } |
| state = DESTROYED; |
| #else |
| int error_code = pthread_mutex_destroy(&impl); |
| __TBB_ASSERT_EX(!error_code,"recursive_mutex: pthread_mutex_destroy failed"); |
| #endif /* _WIN32||_WIN64 */ |
| } |
| |
| } // namespace tbb |