83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
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/*
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* simplified from mutex.c from Foundation Library, in the Public Domain
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* https://github.com/rampantpixels/foundation_lib/blob/master/foundation/mutex.c
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*
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* This file is Copyright (C) PyZMQ Developers
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* Distributed under the terms of the Modified BSD License.
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*
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*/
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#pragma once
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#if defined(_WIN32)
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# include <windows.h>
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#else
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# include <pthread.h>
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#endif
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typedef struct {
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#if defined(_WIN32)
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CRITICAL_SECTION csection;
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#else
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pthread_mutex_t mutex;
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#endif
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} mutex_t;
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static void
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_mutex_initialize(mutex_t* mutex) {
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#if defined(_WIN32)
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InitializeCriticalSectionAndSpinCount(&mutex->csection, 4000);
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#else
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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_RECURSIVE);
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pthread_mutex_init(&mutex->mutex, &attr);
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pthread_mutexattr_destroy(&attr);
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#endif
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}
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static void
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_mutex_finalize(mutex_t* mutex) {
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#if defined(_WIN32)
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DeleteCriticalSection(&mutex->csection);
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#else
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pthread_mutex_destroy(&mutex->mutex);
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#endif
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}
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mutex_t*
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mutex_allocate(void) {
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mutex_t* mutex = (mutex_t*)malloc(sizeof(mutex_t));
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_mutex_initialize(mutex);
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return mutex;
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}
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void
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mutex_deallocate(mutex_t* mutex) {
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if (!mutex)
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return;
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_mutex_finalize(mutex);
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free(mutex);
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}
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int
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mutex_lock(mutex_t* mutex) {
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#if defined(_WIN32)
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EnterCriticalSection(&mutex->csection);
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return 0;
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#else
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return pthread_mutex_lock(&mutex->mutex);
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#endif
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}
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int
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mutex_unlock(mutex_t* mutex) {
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#if defined(_WIN32)
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LeaveCriticalSection(&mutex->csection);
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return 0;
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#else
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return pthread_mutex_unlock(&mutex->mutex);
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#endif
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}
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