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97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/* Libottery by Nick Mathewson.
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This software has been dedicated to the public domain under the CC0
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public domain dedication.
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To the extent possible under law, the person who associated CC0 with
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libottery has waived all copyright and related or neighboring rights
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to libottery.
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You should have received a copy of the CC0 legalcode along with this
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work in doc/cc0.txt. If not, see
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<http://creativecommons.org/publicdomain/zero/1.0/>.
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*/
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#ifndef OTTERY_LOCKING_H_HEADER_INCLUDED_
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#define OTTERY_LOCKING_H_HEADER_INCLUDED_
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/* We don't need locks when building rspamd */
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#ifdef BUILD_RSPAMD
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#define OTTERY_NO_LOCKS
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#endif
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/* Locks */
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#ifdef OTTERY_NO_LOCKS
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/* Nothing here. */
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#elif defined(__APPLE__) && !defined(OTTERY_NO_SPINLOCKS)
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#define OTTERY_OSATOMIC_LOCKS
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#include <libkern/OSAtomic.h>
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#elif defined(_WIN32)
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#define OTTERY_CRITICAL_SECTION
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#include <windows.h>
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#elif defined(HAVE_PTHREAD)
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#define OTTERY_PTHREADS
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#include <pthread.h>
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#else
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#define OTTERY_NO_LOCKS
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#endif
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#ifdef OTTERY_NO_LOCKS
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#define DECL_LOCK(mutex)
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#elif defined(OTTERY_OSATOMIC_LOCKS)
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#define DECL_LOCK(mutex) OSSpinLock mutex;
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#elif defined(OTTERY_CRITICAL_SECTION)
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#define DECL_LOCK(mutex) CRITICAL_SECTION mutex;
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#elif defined(OTTERY_PTHREADS)
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#define DECL_LOCK(mutex) pthread_mutex_t mutex;
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#endif
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#if defined(OTTERY_PTHREADS)
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#define INIT_LOCK(mutex) \
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(pthread_mutex_init((mutex), NULL) != 0)
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/** Acquire the lock for the state "st". */
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#define ACQUIRE_LOCK(mutex) do { \
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pthread_mutex_lock(mutex); \
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} while (0)
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/** Release the lock for the state "st". */
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#define RELEASE_LOCK(mutex) do { \
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pthread_mutex_unlock(mutex); \
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} while (0)
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#define DESTROY_LOCK(mutex) do { \
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pthread_mutex_destroy(mutex); \
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} while (0)
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#elif defined(OTTERY_CRITICAL_SECTION)
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#define INIT_LOCK(mutex) \
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(InitializeCriticalSectionAndSpinCount((mutex), 3000) == 0)
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#define ACQUIRE_LOCK(mutex) do { \
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EnterCriticalSection(mutex); \
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} while (0)
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#define RELEASE_LOCK(mutex) do { \
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LeaveCriticalSection(mutex); \
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} while (0)
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#define DESTROY_LOCK(mutex) do { \
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DeleteCriticalSection(mutex); \
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} while (0)
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#elif defined(OTTERY_OSATOMIC_LOCKS)
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#define INIT_LOCK(mutex) \
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((*(mutex) = 0), 0)
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#define ACQUIRE_LOCK(mutex) do { \
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OSSpinLockLock(mutex); \
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} while (0)
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#define RELEASE_LOCK(mutex) do { \
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OSSpinLockUnlock(mutex); \
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} while (0)
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#define DESTROY_LOCK(mutex) ((void)0)
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#elif defined(OTTERY_NO_LOCKS)
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#define INIT_LOCK(mutex) (0)
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#define DESTROY_LOCK(mutex) ((void)0)
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#define ACQUIRE_LOCK(mutex) ((void)0)
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#define RELEASE_LOCK(mutex) ((void)0)
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#else
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#error How do I lock?
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#endif
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#endif
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