/* * Mutex 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 _FCATOMIC_H_ #define _FCATOMIC_H_ #ifdef HAVE_CONFIG_H #include <config.h> #endif /* atomic_int */ /* We need external help for these */ #if 0 typedef <type> fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add … #define fc_atomic_ptr_get … #define fc_atomic_ptr_cmpexch … #elif !defined(FC_NO_MT) && defined(HAVE_STDATOMIC_PRIMITIVES) #include <stdatomic.h> fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add(AI, V) … #define fc_atomic_ptr_get(P) … static inline FcBool _fc_atomic_ptr_cmpexch(_Atomic(void *)*P, void * O, _Atomic(void *) N) { … } #define fc_atomic_ptr_cmpexch(P,O,N) … /* Casting -1 to _Atomic(int) produces a compiler error with Clang (but not GCC) * so we have to override FC_REF_CONSTANT_VALUE for stdatomic.h atomics. * See https://bugs.llvm.org/show_bug.cgi?id=40249. */ #define FC_REF_CONSTANT_VALUE … #elif !defined(FC_NO_MT) && defined(_MSC_VER) || defined(__MINGW32__) #include "fcwindows.h" typedef LONG fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add … #define fc_atomic_ptr_get … #define fc_atomic_ptr_cmpexch … #elif !defined(FC_NO_MT) && defined(__APPLE__) #include <libkern/OSAtomic.h> #include <AvailabilityMacros.h> typedef int fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add … #if SIZEOF_VOID_P == 8 #define fc_atomic_ptr_get … #elif SIZEOF_VOID_P == 4 #define fc_atomic_ptr_get … #else #error "SIZEOF_VOID_P not 4 or 8 (assumes CHAR_BIT is 8)" #endif #if (MAC_OS_X_VERSION_MIN_REQUIRED >= 1050 || __IPHONE_OS_VERSION_MIN_REQUIRED >= 20100) #define fc_atomic_ptr_cmpexch … #else #if __LP64__ #define fc_atomic_ptr_cmpexch … #else #define fc_atomic_ptr_cmpexch … #endif #endif #elif !defined(FC_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) typedef int fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add … #define fc_atomic_ptr_get … #define fc_atomic_ptr_cmpexch … #elif !defined(FC_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS) #include <atomic.h> #include <mbarrier.h> typedef unsigned int fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add … #define fc_atomic_ptr_get … #define fc_atomic_ptr_cmpexch … #elif !defined(FC_NO_MT) #define FC_ATOMIC_INT_NIL … typedef volatile int fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add … #define fc_atomic_ptr_get … #define fc_atomic_ptr_cmpexch … #else /* FC_NO_MT */ typedef int fc_atomic_int_t; #define FC_ATOMIC_INT_FORMAT … #define fc_atomic_int_add … #define fc_atomic_ptr_get … #define fc_atomic_ptr_cmpexch … #endif /* reference count */ #ifndef FC_REF_CONSTANT_VALUE #define FC_REF_CONSTANT_VALUE … #endif #define FC_REF_CONSTANT … FcRef; static inline void FcRefInit (FcRef *r, int v) { … } static inline int FcRefInc (FcRef *r) { … } static inline int FcRefDec (FcRef *r) { … } static inline int FcRefAdd (FcRef *r, int v) { … } static inline void FcRefSetConst (FcRef *r) { … } static inline FcBool FcRefIsConst (const FcRef *r) { … } #endif /* _FCATOMIC_H_ */
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