HarfBuzz text shaping engine
http://harfbuzz.github.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
141 lines
4.6 KiB
141 lines
4.6 KiB
/* |
|
* 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 HB_MUTEX_PRIVATE_HH |
|
#define HB_MUTEX_PRIVATE_HH |
|
|
|
#include "hb-private.hh" |
|
|
|
|
|
/* mutex */ |
|
|
|
/* We need external help for these */ |
|
|
|
#if defined(HB_MUTEX_IMPL_INIT) \ |
|
&& defined(hb_mutex_impl_init) \ |
|
&& defined(hb_mutex_impl_lock) \ |
|
&& defined(hb_mutex_impl_unlock) \ |
|
&& defined(hb_mutex_impl_finish) |
|
|
|
/* Defined externally, i.e. in config.h; must have typedef'ed hb_mutex_impl_t as well. */ |
|
|
|
|
|
#elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__)) |
|
|
|
#include <windows.h> |
|
typedef CRITICAL_SECTION hb_mutex_impl_t; |
|
#define HB_MUTEX_IMPL_INIT {0} |
|
#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP) |
|
#define hb_mutex_impl_init(M) InitializeCriticalSectionEx (M, 0, 0) |
|
#else |
|
#define hb_mutex_impl_init(M) InitializeCriticalSection (M) |
|
#endif |
|
#define hb_mutex_impl_lock(M) EnterCriticalSection (M) |
|
#define hb_mutex_impl_unlock(M) LeaveCriticalSection (M) |
|
#define hb_mutex_impl_finish(M) DeleteCriticalSection (M) |
|
|
|
|
|
#elif !defined(HB_NO_MT) && (defined(HAVE_PTHREAD) || defined(__APPLE__)) |
|
|
|
#include <pthread.h> |
|
typedef pthread_mutex_t hb_mutex_impl_t; |
|
#define HB_MUTEX_IMPL_INIT PTHREAD_MUTEX_INITIALIZER |
|
#define hb_mutex_impl_init(M) pthread_mutex_init (M, NULL) |
|
#define hb_mutex_impl_lock(M) pthread_mutex_lock (M) |
|
#define hb_mutex_impl_unlock(M) pthread_mutex_unlock (M) |
|
#define hb_mutex_impl_finish(M) pthread_mutex_destroy (M) |
|
|
|
|
|
#elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) |
|
|
|
#if defined(HAVE_SCHED_H) && defined(HAVE_SCHED_YIELD) |
|
# include <sched.h> |
|
# define HB_SCHED_YIELD() sched_yield () |
|
#else |
|
# define HB_SCHED_YIELD() HB_STMT_START {} HB_STMT_END |
|
#endif |
|
|
|
/* This actually is not a totally awful implementation. */ |
|
typedef volatile int hb_mutex_impl_t; |
|
#define HB_MUTEX_IMPL_INIT 0 |
|
#define hb_mutex_impl_init(M) *(M) = 0 |
|
#define hb_mutex_impl_lock(M) HB_STMT_START { while (__sync_lock_test_and_set((M), 1)) HB_SCHED_YIELD (); } HB_STMT_END |
|
#define hb_mutex_impl_unlock(M) __sync_lock_release (M) |
|
#define hb_mutex_impl_finish(M) HB_STMT_START {} HB_STMT_END |
|
|
|
|
|
#elif !defined(HB_NO_MT) |
|
|
|
#if defined(HAVE_SCHED_H) && defined(HAVE_SCHED_YIELD) |
|
# include <sched.h> |
|
# define HB_SCHED_YIELD() sched_yield () |
|
#else |
|
# define HB_SCHED_YIELD() HB_STMT_START {} HB_STMT_END |
|
#endif |
|
|
|
#define HB_MUTEX_INT_NIL 1 /* Warn that fallback implementation is in use. */ |
|
typedef volatile int hb_mutex_impl_t; |
|
#define HB_MUTEX_IMPL_INIT 0 |
|
#define hb_mutex_impl_init(M) *(M) = 0 |
|
#define hb_mutex_impl_lock(M) HB_STMT_START { while (*(M)) HB_SCHED_YIELD (); (*(M))++; } HB_STMT_END |
|
#define hb_mutex_impl_unlock(M) (*(M))--; |
|
#define hb_mutex_impl_finish(M) HB_STMT_START {} HB_STMT_END |
|
|
|
|
|
#else /* HB_NO_MT */ |
|
|
|
typedef int hb_mutex_impl_t; |
|
#define HB_MUTEX_IMPL_INIT 0 |
|
#define hb_mutex_impl_init(M) HB_STMT_START {} HB_STMT_END |
|
#define hb_mutex_impl_lock(M) HB_STMT_START {} HB_STMT_END |
|
#define hb_mutex_impl_unlock(M) HB_STMT_START {} HB_STMT_END |
|
#define hb_mutex_impl_finish(M) HB_STMT_START {} HB_STMT_END |
|
|
|
|
|
#endif |
|
|
|
|
|
#define HB_MUTEX_INIT {HB_MUTEX_IMPL_INIT} |
|
|
|
struct hb_mutex_t |
|
{ |
|
/* TODO Add tracing. */ |
|
|
|
hb_mutex_impl_t m; |
|
|
|
inline void init (void) { hb_mutex_impl_init (&m); } |
|
inline void lock (void) { hb_mutex_impl_lock (&m); } |
|
inline void unlock (void) { hb_mutex_impl_unlock (&m); } |
|
inline void finish (void) { hb_mutex_impl_finish (&m); } |
|
}; |
|
|
|
|
|
#endif /* HB_MUTEX_PRIVATE_HH */
|
|
|