mirror of
https://github.com/official-stockfish/Stockfish.git
synced 2026-07-23 05:07:14 +00:00
Marco Costalba
d58176bfea
The timer will be fired asynchronously to handle time management flags, while other threads are searching. This implementation uses a thread waiting on a timed condition variable instead of real timers. This approach allow to reduce platform dependant code to a minimum and also is the most portable given that timers libraries are very different among platforms and also the best ones are not compatible with olds Windows. Also retire the now unused polling code. No functional change. Signed-off-by: Marco Costalba <mcostalba@gmail.com>
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
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Stockfish 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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Stockfish 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(LOCK_H_INCLUDED)
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#define LOCK_H_INCLUDED
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#if !defined(_MSC_VER)
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# include <pthread.h>
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typedef pthread_mutex_t Lock;
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typedef pthread_cond_t WaitCondition;
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# define lock_init(x) pthread_mutex_init(x, NULL)
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# define lock_grab(x) pthread_mutex_lock(x)
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# define lock_release(x) pthread_mutex_unlock(x)
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# define lock_destroy(x) pthread_mutex_destroy(x)
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# define cond_destroy(x) pthread_cond_destroy(x)
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# define cond_init(x) pthread_cond_init(x, NULL)
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# define cond_signal(x) pthread_cond_signal(x)
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# define cond_wait(x,y) pthread_cond_wait(x,y)
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# define cond_timedwait(x,y,z) pthread_cond_timedwait(x,y,z)
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#else
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#define NOMINMAX // disable macros min() and max()
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#undef WIN32_LEAN_AND_MEAN
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#undef NOMINMAX
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// Default fast and race free locks and condition variables
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#if !defined(OLD_LOCKS)
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typedef SRWLOCK Lock;
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typedef CONDITION_VARIABLE WaitCondition;
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# define lock_init(x) InitializeSRWLock(x)
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# define lock_grab(x) AcquireSRWLockExclusive(x)
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# define lock_release(x) ReleaseSRWLockExclusive(x)
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# define lock_destroy(x) (x)
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# define cond_destroy(x) (x)
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# define cond_init(x) InitializeConditionVariable(x)
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# define cond_signal(x) WakeConditionVariable(x)
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# define cond_wait(x,y) SleepConditionVariableSRW(x,y,INFINITE,0)
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# define cond_timedwait(x,y,z) SleepConditionVariableSRW(x,y,z,0)
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// Fallback solution to build for Windows XP and older versions, note that
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// cond_wait() is racy between lock_release() and WaitForSingleObject().
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#else
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typedef CRITICAL_SECTION Lock;
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typedef HANDLE WaitCondition;
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# define lock_init(x) InitializeCriticalSection(x)
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# define lock_grab(x) EnterCriticalSection(x)
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# define lock_release(x) LeaveCriticalSection(x)
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# define lock_destroy(x) DeleteCriticalSection(x)
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# define cond_init(x) { *x = CreateEvent(0, FALSE, FALSE, 0); }
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# define cond_destroy(x) CloseHandle(*x)
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# define cond_signal(x) SetEvent(*x)
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# define cond_wait(x,y) { lock_release(y); WaitForSingleObject(*x, INFINITE); lock_grab(y); }
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# define cond_timedwait(x,y,z) { lock_release(y); WaitForSingleObject(*x,z); lock_grab(y); }
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#endif
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#endif
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#endif // !defined(LOCK_H_INCLUDED)
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