diff options
| -rw-r--r-- | COPYING | 1 | ||||
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/fcatomic.h | 123 | ||||
| -rw-r--r-- | src/fcint.h | 4 | ||||
| -rw-r--r-- | src/fcmutex.h | 126 |
5 files changed, 254 insertions, 2 deletions
@@ -5,6 +5,7 @@ Copyright © 2005 Patrick Lam Copyright © 2009 Roozbeh Pournader Copyright © 2008,2009 Red Hat, Inc. Copyright © 2008 Danilo Šegan +Copyright © 2012 Google, Inc. Permission to use, copy, modify, distribute, and sell this software and its diff --git a/src/Makefile.am b/src/Makefile.am index b700f5a9..da1358c9 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -123,6 +123,7 @@ EXTRA_DIST += \ libfontconfig_la_SOURCES = \ fcarch.h \ fcatomic.c \ + fcatomic.h \ fcblanks.c \ fccache.c \ fccfg.c \ @@ -138,6 +139,7 @@ libfontconfig_la_SOURCES = \ fclist.c \ fcmatch.c \ fcmatrix.c \ + fcmutex.h \ fcname.c \ fcobjs.c \ fcobjs.h \ diff --git a/src/fcatomic.h b/src/fcatomic.h new file mode 100644 index 00000000..7479a3dd --- /dev/null +++ b/src/fcatomic.h @@ -0,0 +1,123 @@ +/* + * Mutex operations. Originally copied from HarfBuzz. + * + * Copyright © 2007 Chris Wilson + * Copyright © 2009,2010 Red Hat, Inc. + * Copyright © 2011,2012 Google, Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * 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 <chris@chris-wilson.co.uk> + * 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 + + +#elif !defined(FC_NO_MT) && defined(_MSC_VER) || defined(__MINGW32__) + +#define WIN32_LEAN_AND_MEAN +#include <windows.h> + +/* mingw32 does not have MemoryBarrier. + * MemoryBarrier may be defined as a macro or a function. + * Just make a failsafe version for ourselves. */ +#ifdef MemoryBarrier +#define HBMemoryBarrier MemoryBarrier +#else +static inline void HBMemoryBarrier (void) { + long dummy = 0; + InterlockedExchange (&dummy, 1); +} +#endif + +typedef long fc_atomic_int_t; +#define fc_atomic_int_add(AI, V) InterlockedExchangeAdd (&(AI), (V)) + +#define fc_atomic_ptr_get(P) (HBMemoryBarrier (), (void *) *(P)) +#define fc_atomic_ptr_cmpexch(P,O,N) (InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O)) + + +#elif !defined(FC_NO_MT) && defined(__APPLE__) + +#include <libkern/OSAtomic.h> + +typedef int32_t fc_atomic_int_t; +#define fc_atomic_int_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V)) + +#define fc_atomic_ptr_get(P) (OSMemoryBarrier (), (void *) *(P)) +#define fc_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P)) + + +#elif !defined(FC_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) + +typedef int fc_atomic_int_t; +#define fc_atomic_int_add(AI, V) __sync_fetch_and_add (&(AI), (V)) + +#define fc_atomic_ptr_get(P) (void *) (__sync_synchronize (), *(P)) +#define fc_atomic_ptr_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N)) + + +#elif !defined(FC_NO_MT) + +#define FC_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */ +typedef volatile int fc_atomic_int_t; +#define fc_atomic_int_add(AI, V) (((AI) += (V)) - (V)) + +#define fc_atomic_ptr_get(P) ((void *) *(P)) +#define fc_atomic_ptr_cmpexch(P,O,N) (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false) + + +#else /* FC_NO_MT */ + +typedef int fc_atomic_int_t; +#define fc_atomic_int_add(AI, V) (((AI) += (V)) - (V)) + +#define fc_atomic_ptr_get(P) ((void *) *(P)) +#define fc_atomic_ptr_cmpexch(P,O,N) (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false) + +#endif + +/* reference count */ +#define FC_REF_CONSTANT ((fc_atomic_int_t) -1) +#define FC_REF_CONSTANT_INIT {FC_REF_CONSTANT} +typedef struct _FcRef { fc_atomic_int_t count; } FcRef; +static inline void FcRefInit (FcRef *r, int v) { r->count = v; } +static inline int FcRefInc (FcRef *r) { return fc_atomic_int_add (r->count, +1); } +static inline int FcRefDec (FcRef *r) { return fc_atomic_int_add (r->count, -1); } +static inline void FcRefFinish (FcRef *r) { r->count = FC_REF_CONSTANT; } +static inline FcBool FcRefIsConst (FcRef *r) { return r->count == FC_REF_CONSTANT; } + +#endif /* _FCATOMIC_H_ */ diff --git a/src/fcint.h b/src/fcint.h index a6d7e8a4..d881a777 100644 --- a/src/fcint.h +++ b/src/fcint.h @@ -44,6 +44,8 @@ #include <fontconfig/fontconfig.h> #include <fontconfig/fcprivate.h> #include "fcdeprecate.h" +#include "fcmutex.h" +#include "fcatomic.h" #ifndef FC_CONFIG_PATH #define FC_CONFIG_PATH "fonts.conf" @@ -293,8 +295,6 @@ typedef struct _FcCharLeaf { FcChar32 map[256/32]; } FcCharLeaf; -#define FC_REF_CONSTANT -1 - struct _FcCharSet { int ref; /* reference count */ int num; /* size of leaves and numbers arrays */ diff --git a/src/fcmutex.h b/src/fcmutex.h new file mode 100644 index 00000000..dd4487d4 --- /dev/null +++ b/src/fcmutex.h @@ -0,0 +1,126 @@ +/* + * Atomic int and pointer operations. Originally copied from HarfBuzz. + * + * Copyright © 2007 Chris Wilson + * Copyright © 2009,2010 Red Hat, Inc. + * Copyright © 2011,2012 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 <chris@chris-wilson.co.uk> + * 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 + + +/* mutex */ + +/* We need external help for these */ + +#if 0 + + +#elif !defined(FC_NO_MT) && defined(_MSC_VER) || defined(__MINGW32__) + +#define WIN32_LEAN_AND_MEAN +#include <windows.h> +typedef CRITICAL_SECTION fc_mutex_impl_t; +#define FC_MUTEX_IMPL_INIT { NULL, 0, 0, NULL, NULL, 0 } +#define fc_mutex_impl_init(M) InitializeCriticalSection (M) +#define fc_mutex_impl_lock(M) EnterCriticalSection (M) +#define fc_mutex_impl_unlock(M) LeaveCriticalSection (M) +#define fc_mutex_impl_finish(M) DeleteCriticalSection (M) + + +#elif !defined(FC_NO_MT) && (defined(HAVE_PTHREAD) || defined(__APPLE__)) + +#include <pthread.h> +typedef pthread_mutex_t fc_mutex_impl_t; +#define FC_MUTEX_IMPL_INIT PTHREAD_MUTEX_INITIALIZER +#define fc_mutex_impl_init(M) pthread_mutex_init (M, NULL) +#define fc_mutex_impl_lock(M) pthread_mutex_lock (M) +#define fc_mutex_impl_unlock(M) pthread_mutex_unlock (M) +#define fc_mutex_impl_finish(M) pthread_mutex_destroy (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() sched_yield () +#else +# define FC_SCHED_YIELD() FC_STMT_START {} FC_STMT_END +#endif + +/* This actually is not a totally awful implementation. */ +typedef volatile int fc_mutex_impl_t; +#define FC_MUTEX_IMPL_INIT 0 +#define fc_mutex_impl_init(M) *(M) = 0 +#define fc_mutex_impl_lock(M) FC_STMT_START { while (__sync_lock_test_and_set((M), 1)) FC_SCHED_YIELD (); } FC_STMT_END +#define fc_mutex_impl_unlock(M) __sync_lock_release (M) +#define fc_mutex_impl_finish(M) FC_STMT_START {} FC_STMT_END + + +#elif !defined(FC_NO_MT) + +#if defined(HAVE_SCHED_H) && defined(HAVE_SCHED_YIELD) +# include <sched.h> +# define FC_SCHED_YIELD() sched_yield () +#else +# define FC_SCHED_YIELD() FC_STMT_START {} FC_STMT_END +#endif + +#define FC_MUTEX_INT_NIL 1 /* Warn that fallback implementation is in use. */ +typedef volatile int fc_mutex_impl_t; +#define FC_MUTEX_IMPL_INIT 0 +#define fc_mutex_impl_init(M) *(M) = 0 +#define fc_mutex_impl_lock(M) FC_STMT_START { while (*(M)) FC_SCHED_YIELD (); (*(M))++; } FC_STMT_END +#define fc_mutex_impl_unlock(M) (*(M))--; +#define fc_mutex_impl_finish(M) FC_STMT_START {} FC_STMT_END + + +#else /* FC_NO_MT */ + +typedef int fc_mutex_impl_t; +#define FC_MUTEX_IMPL_INIT 0 +#define fc_mutex_impl_init(M) FC_STMT_START {} FC_STMT_END +#define fc_mutex_impl_lock(M) FC_STMT_START {} FC_STMT_END +#define fc_mutex_impl_unlock(M) FC_STMT_START {} FC_STMT_END +#define fc_mutex_impl_finish(M) FC_STMT_START {} FC_STMT_END + +#endif + + +#define FC_MUTEX_INIT {FC_MUTEX_IMPL_INIT} +typedef fc_mutex_impl_t FcMutex; +static inline void FcMutexInit (FcMutex *m) { fc_mutex_impl_init (m); } +static inline void FcMutexLock (FcMutex *m) { fc_mutex_impl_lock (m); } +static inline void FcMutexUnlock (FcMutex *m) { fc_mutex_impl_unlock (m); } +static inline void FcMutexFinish (FcMutex *m) { fc_mutex_impl_finish (m); } + + +#endif /* _FCMUTEX_H_ */ |