/* * Atomic int and pointer operations. Originally copied from HarfBuzz. * * Copyright © 2007 Chris Wilson * Copyright © 2009,2010 Red Hat, Inc. * Copyright © 2011,2012,2013 Google, Inc. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Contributor(s): * Chris Wilson <[email protected]> * Red Hat Author(s): Behdad Esfahbod * Google Author(s): Behdad Esfahbod */ #ifndef _FCMUTEX_H_ #define _FCMUTEX_H_ #ifdef HAVE_CONFIG_H #include <config.h> #endif #define FC_STMT_START … #define FC_STMT_END … /* mutex */ /* We need external help for these */ #if 0 #elif !defined(FC_NO_MT) && defined(_MSC_VER) || defined(__MINGW32__) #include "fcwindows.h" typedef CRITICAL_SECTION fc_mutex_impl_t; #define FC_MUTEX_IMPL_INIT … #define fc_mutex_impl_init … #define fc_mutex_impl_lock … #define fc_mutex_impl_unlock … #define fc_mutex_impl_finish … #elif !defined(FC_NO_MT) && (defined(HAVE_PTHREAD) || defined(__APPLE__)) #include <pthread.h> fc_mutex_impl_t; #define FC_MUTEX_IMPL_INIT … #define fc_mutex_impl_init(M) … #define fc_mutex_impl_lock(M) … #define fc_mutex_impl_unlock(M) … #define fc_mutex_impl_finish(M) … #elif !defined(FC_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) #if defined(HAVE_SCHED_H) && defined(HAVE_SCHED_YIELD) # include <sched.h> #define FC_SCHED_YIELD … #else #define FC_SCHED_YIELD … #endif /* This actually is not a totally awful implementation. */ typedef volatile int fc_mutex_impl_t; #define FC_MUTEX_IMPL_INIT … #define fc_mutex_impl_init … #define fc_mutex_impl_lock … #define fc_mutex_impl_unlock … #define fc_mutex_impl_finish … #elif !defined(FC_NO_MT) #if defined(HAVE_SCHED_H) && defined(HAVE_SCHED_YIELD) # include <sched.h> #define FC_SCHED_YIELD … #else #define FC_SCHED_YIELD … #endif #define FC_MUTEX_INT_NIL … typedef volatile int fc_mutex_impl_t; #define FC_MUTEX_IMPL_INIT … #define fc_mutex_impl_init … #define fc_mutex_impl_lock … #define fc_mutex_impl_unlock … #define fc_mutex_impl_finish … #else /* FC_NO_MT */ typedef int fc_mutex_impl_t; #define FC_MUTEX_IMPL_INIT … #define fc_mutex_impl_init … #define fc_mutex_impl_lock … #define fc_mutex_impl_unlock … #define fc_mutex_impl_finish … #endif #define FC_MUTEX_INIT … FcMutex; static inline void FcMutexInit (FcMutex *m) { … } static inline void FcMutexLock (FcMutex *m) { … } static inline void FcMutexUnlock (FcMutex *m) { … } static inline void FcMutexFinish (FcMutex *m) { … } #endif /* _FCMUTEX_H_ */
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