mirror of
https://github.com/id-Software/DOOM-3-BFG.git
synced 2024-12-03 09:22:45 +00:00
450 lines
11 KiB
C++
450 lines
11 KiB
C++
/*
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===========================================================================
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Doom 3 BFG Edition GPL Source Code
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Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
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Copyright (C) 2012 Robert Beckebans
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This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
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Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#pragma hdrstop
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#include "../../precompiled.h"
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//#define DEBUG_THREADS
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typedef void* ( *pthread_function_t )( void* );
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/*
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========================
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Sys_Createthread
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========================
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*/
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uintptr_t Sys_CreateThread( xthread_t function, void* parms, xthreadPriority priority, const char* name, core_t core, int stackSize, bool suspended )
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{
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//Sys_EnterCriticalSection();
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pthread_attr_t attr;
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pthread_attr_init( &attr );
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if( pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE ) != 0 )
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{
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idLib::common->FatalError( "ERROR: pthread_attr_setdetachstate %s failed\n", name );
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return ( uintptr_t )0;
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}
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pthread_t handle;
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if( pthread_create( ( pthread_t* )&handle, &attr, ( pthread_function_t )function, parms ) != 0 )
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{
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idLib::common->FatalError( "ERROR: pthread_create %s failed\n", name );
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return ( uintptr_t )0;
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}
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pthread_attr_destroy( &attr );
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// RB: TODO pthread_setname_np is different on Linux, MacOSX and other systems
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#if defined(DEBUG_THREADS)
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if( pthread_setname_np( handle, name ) != 0 )
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{
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idLib::common->FatalError( "ERROR: pthread_setname_np %s failed\n", name );
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return ( uintptr_t )0;
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}
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#endif
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/*
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TODO RB: support thread priorities?
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if( priority == THREAD_HIGHEST )
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{
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SetThreadPriority( ( HANDLE )handle, THREAD_PRIORITY_HIGHEST ); // we better sleep enough to do this
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}
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else if( priority == THREAD_ABOVE_NORMAL )
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{
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SetThreadPriority( ( HANDLE )handle, THREAD_PRIORITY_ABOVE_NORMAL );
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}
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else if( priority == THREAD_BELOW_NORMAL )
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{
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SetThreadPriority( ( HANDLE )handle, THREAD_PRIORITY_BELOW_NORMAL );
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}
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else if( priority == THREAD_LOWEST )
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{
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SetThreadPriority( ( HANDLE )handle, THREAD_PRIORITY_LOWEST );
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}
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*/
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// Under Linux, we don't set the thread affinity and let the OS deal with scheduling
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return ( uintptr_t )handle;
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}
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/*
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========================
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Sys_GetCurrentThreadID
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========================
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*/
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uintptr_t Sys_GetCurrentThreadID()
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{
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return pthread_self();
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}
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/*
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========================
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Sys_DestroyThread
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========================
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*/
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void Sys_DestroyThread( uintptr_t threadHandle )
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{
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if( threadHandle == 0 )
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{
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return;
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}
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char name[128];
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name[0] = '\0';
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#if defined(DEBUG_THREADS)
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pthread_getname_np( threadHandle, name, sizeof( name ) );
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#endif
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#if 0 //!defined(__ANDROID__)
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if( pthread_cancel( ( pthread_t )threadHandle ) != 0 )
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{
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idLib::common->FatalError( "ERROR: pthread_cancel %s failed\n", name );
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}
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#endif
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if( pthread_join( ( pthread_t )threadHandle, NULL ) != 0 )
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{
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idLib::common->FatalError( "ERROR: pthread_join %s failed\n", name );
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}
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}
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/*
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========================
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Sys_Yield
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========================
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*/
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void Sys_Yield()
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{
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pthread_yield();
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}
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/*
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================================================================================================
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Signal
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================================================================================================
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*/
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idSysSignal::idSysSignal( bool manualReset )
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{
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#if 0
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pthread_mutexattr_t attr;
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pthread_mutexattr_init( &attr );
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pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
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//pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_DEFAULT );
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pthread_mutex_init( &mutex, &attr );
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pthread_mutexattr_destroy( &attr );
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#else
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pthread_mutex_init( &mutex, NULL );
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#endif
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pthread_cond_init( &cond, NULL );
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signaled = false;
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signalCounter = 0;
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waiting = false;
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this->manualReset = manualReset;
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}
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idSysSignal::~idSysSignal()
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{
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pthread_cond_destroy( &cond );
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pthread_mutex_destroy( &mutex );
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}
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void idSysSignal::Raise()
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{
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pthread_mutex_lock( &mutex );
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//if( waiting )
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{
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//pthread_cond_signal( &cond );
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//pthread_cond_broadcast( &cond );
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}
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//else
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if( !signaled )
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{
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// emulate Windows behaviour: if no thread is waiting, leave the signal on so next wait keeps going
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signaled = true;
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signalCounter++;
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pthread_cond_signal( &cond );
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//pthread_cond_broadcast( &cond );
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}
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pthread_mutex_unlock( &mutex );
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}
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void idSysSignal::Clear()
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{
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pthread_mutex_lock( &mutex );
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signaled = false;
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pthread_mutex_unlock( &mutex );
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}
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// Wait returns true if the object is in a signalled state and
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// returns false if the wait timed out. Wait also clears the signalled
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// state when the signalled state is reached within the time out period.
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bool idSysSignal::Wait( int timeout )
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{
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pthread_mutex_lock( &mutex );
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int result = 0;
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#if 1
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assert( !waiting ); // WaitForEvent from multiple threads? that wouldn't be good
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if( signaled )
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{
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if( !manualReset )
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{
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// emulate Windows behaviour: signal has been raised already. clear and keep going
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signaled = false;
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result = 0;
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}
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}
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else
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#endif
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{
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#if 0
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int signalValue = signalCounter;
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//while( !signaled && signalValue == signalCounter )
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#endif
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{
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waiting = true;
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if( timeout == WAIT_INFINITE )
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{
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result = pthread_cond_wait( &cond, &mutex );
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assert( result == 0 );
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}
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else
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{
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timespec ts;
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clock_gettime( CLOCK_REALTIME, &ts );
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ts.tv_nsec += ( timeout * 1000000 );
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result = pthread_cond_timedwait( &cond, &mutex, &ts );
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assert( result == 0 || ( timeout != idSysSignal::WAIT_INFINITE && result == ETIMEDOUT ) );
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}
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waiting = false;
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}
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if( !manualReset )
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{
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signaled = false;
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}
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}
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pthread_mutex_unlock( &mutex );
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return ( result == 0 );
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}
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/*
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================================================================================================
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Mutex
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================================================================================================
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*/
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/*
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========================
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Sys_MutexCreate
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========================
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*/
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void Sys_MutexCreate( mutexHandle_t& handle )
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{
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pthread_mutexattr_t attr;
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pthread_mutexattr_init( &attr );
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pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
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pthread_mutex_init( &handle, &attr );
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pthread_mutexattr_destroy( &attr );
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}
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/*
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========================
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Sys_MutexDestroy
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========================
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*/
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void Sys_MutexDestroy( mutexHandle_t& handle )
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{
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pthread_mutex_destroy( &handle );
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}
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/*
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========================
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Sys_MutexLock
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========================
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*/
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bool Sys_MutexLock( mutexHandle_t& handle, bool blocking )
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{
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if( pthread_mutex_trylock( &handle ) != 0 )
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{
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if( !blocking )
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{
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return false;
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}
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pthread_mutex_lock( &handle );
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}
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return true;
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}
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/*
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========================
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Sys_MutexUnlock
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========================
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*/
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void Sys_MutexUnlock( mutexHandle_t& handle )
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{
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pthread_mutex_unlock( & handle );
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}
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/*
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================================================================================================
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Interlocked Integer
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================================================================================================
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*/
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/*
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========================
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Sys_InterlockedIncrement
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========================
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*/
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interlockedInt_t Sys_InterlockedIncrement( interlockedInt_t& value )
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{
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// return InterlockedIncrementAcquire( & value );
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return __sync_add_and_fetch( &value, 1 );
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}
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/*
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========================
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Sys_InterlockedDecrement
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========================
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*/
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interlockedInt_t Sys_InterlockedDecrement( interlockedInt_t& value )
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{
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// return InterlockedDecrementRelease( & value );
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return __sync_sub_and_fetch( &value, 1 );
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}
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/*
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========================
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Sys_InterlockedAdd
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========================
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*/
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interlockedInt_t Sys_InterlockedAdd( interlockedInt_t& value, interlockedInt_t i )
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{
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//return InterlockedExchangeAdd( & value, i ) + i;
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return __sync_add_and_fetch( &value, i );
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}
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/*
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========================
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Sys_InterlockedSub
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========================
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*/
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interlockedInt_t Sys_InterlockedSub( interlockedInt_t& value, interlockedInt_t i )
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{
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//return InterlockedExchangeAdd( & value, - i ) - i;
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return __sync_sub_and_fetch( &value, i );
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}
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/*
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========================
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Sys_InterlockedExchange
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========================
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*/
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interlockedInt_t Sys_InterlockedExchange( interlockedInt_t& value, interlockedInt_t exchange )
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{
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//return InterlockedExchange( & value, exchange );
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// source: http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html
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// These builtins perform an atomic compare and swap. That is, if the current value of *ptr is oldval, then write newval into *ptr.
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return __sync_val_compare_and_swap( &value, value, exchange );
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}
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/*
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========================
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Sys_InterlockedCompareExchange
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========================
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*/
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interlockedInt_t Sys_InterlockedCompareExchange( interlockedInt_t& value, interlockedInt_t comparand, interlockedInt_t exchange )
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{
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//return InterlockedCompareExchange( & value, exchange, comparand );
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return __sync_val_compare_and_swap( &value, comparand, exchange );
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}
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/*
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================================================================================================
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Interlocked Pointer
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================================================================================================
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*/
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/*
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========================
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Sys_InterlockedExchangePointer
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========================
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*/
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void* Sys_InterlockedExchangePointer( void*& ptr, void* exchange )
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{
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//return InterlockedExchangePointer( & ptr, exchange );
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return __sync_val_compare_and_swap( &ptr, ptr, exchange );
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}
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/*
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========================
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Sys_InterlockedCompareExchangePointer
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========================
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*/
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void* Sys_InterlockedCompareExchangePointer( void*& ptr, void* comparand, void* exchange )
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{
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//return InterlockedCompareExchangePointer( & ptr, exchange, comparand );
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return __sync_val_compare_and_swap( &ptr, comparand, exchange );
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}
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