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80 lines
2.7 KiB
C
80 lines
2.7 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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#else
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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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// 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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// 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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#endif
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#endif
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#endif // !defined(LOCK_H_INCLUDED)
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