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Diffstat (limited to 'gfx/harfbuzz/src/hb-mutex.hh')
| -rw-r--r-- | gfx/harfbuzz/src/hb-mutex.hh | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-mutex.hh b/gfx/harfbuzz/src/hb-mutex.hh new file mode 100644 index 0000000000..e329d9864f --- /dev/null +++ b/gfx/harfbuzz/src/hb-mutex.hh @@ -0,0 +1,122 @@ +/* + * 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_HH +#define HB_MUTEX_HH + +#include "hb.hh" + + +/* mutex */ + +/* We need external help for these */ + +#if 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(HB_MUTEX_IMPL_STD_MUTEX) && (defined(HAVE_PTHREAD) || defined(__APPLE__)) + +#include <pthread.h> +typedef pthread_mutex_t hb_mutex_impl_t; +#define hb_mutex_impl_init(M) pthread_mutex_init (M, nullptr) +#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(HB_MUTEX_IMPL_STD_MUTEX) && defined(_WIN32) + +typedef CRITICAL_SECTION hb_mutex_impl_t; +#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_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) + +#include <mutex> +typedef std::mutex hb_mutex_impl_t; +#define hb_mutex_impl_init(M) HB_STMT_START { new (M) hb_mutex_impl_t; } HB_STMT_END +#define hb_mutex_impl_lock(M) (M)->lock () +#define hb_mutex_impl_unlock(M) (M)->unlock () +#define hb_mutex_impl_finish(M) HB_STMT_START { (M)->~hb_mutex_impl_t(); } HB_STMT_END + + +#else /* defined(HB_NO_MT) */ + +typedef int hb_mutex_impl_t; +#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 + + +struct hb_mutex_t +{ + /* Create space for, but do not initialize m. */ + alignas(hb_mutex_impl_t) char m[sizeof (hb_mutex_impl_t)]; + + hb_mutex_t () { init (); } + ~hb_mutex_t () { fini (); } + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wcast-align" + void init () { hb_mutex_impl_init ((hb_mutex_impl_t *) m); } + void lock () { hb_mutex_impl_lock ((hb_mutex_impl_t *) m); } + void unlock () { hb_mutex_impl_unlock ((hb_mutex_impl_t *) m); } + void fini () { hb_mutex_impl_finish ((hb_mutex_impl_t *) m); } +#pragma GCC diagnostic pop +}; + +struct hb_lock_t +{ + hb_lock_t (hb_mutex_t &mutex_) : mutex (&mutex_) { mutex->lock (); } + hb_lock_t (hb_mutex_t *mutex_) : mutex (mutex_) { if (mutex) mutex->lock (); } + ~hb_lock_t () { if (mutex) mutex->unlock (); } + private: + hb_mutex_t *mutex; +}; + + +#endif /* HB_MUTEX_HH */ |