116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
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/*
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* Copyright © 2007 Chris Wilson
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* Copyright © 2009,2010 Red Hat, Inc.
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* Copyright © 2011,2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Contributor(s):
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* Chris Wilson <chris@chris-wilson.co.uk>
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_MUTEX_HH
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#define HB_MUTEX_HH
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#include "hb.hh"
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/* mutex */
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/* We need external help for these */
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#if defined(HB_MUTEX_IMPL_INIT) \
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&& defined(hb_mutex_impl_init) \
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&& defined(hb_mutex_impl_lock) \
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&& defined(hb_mutex_impl_unlock) \
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&& defined(hb_mutex_impl_finish)
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/* Defined externally, i.e. in config.h; must have typedef'ed hb_mutex_impl_t as well. */
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#elif !defined(HB_NO_MT) && (defined(HAVE_PTHREAD) || defined(__APPLE__))
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#include <pthread.h>
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typedef pthread_mutex_t hb_mutex_impl_t;
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#define HB_MUTEX_IMPL_INIT PTHREAD_MUTEX_INITIALIZER
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#define hb_mutex_impl_init(M) pthread_mutex_init (M, nullptr)
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#define hb_mutex_impl_lock(M) pthread_mutex_lock (M)
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#define hb_mutex_impl_unlock(M) pthread_mutex_unlock (M)
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#define hb_mutex_impl_finish(M) pthread_mutex_destroy (M)
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#elif !defined(HB_NO_MT) && defined(_WIN32)
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typedef CRITICAL_SECTION hb_mutex_impl_t;
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#define HB_MUTEX_IMPL_INIT {0}
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#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
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#define hb_mutex_impl_init(M) InitializeCriticalSectionEx (M, 0, 0)
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#else
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#define hb_mutex_impl_init(M) InitializeCriticalSection (M)
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#endif
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#define hb_mutex_impl_lock(M) EnterCriticalSection (M)
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#define hb_mutex_impl_unlock(M) LeaveCriticalSection (M)
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#define hb_mutex_impl_finish(M) DeleteCriticalSection (M)
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#elif defined(HB_NO_MT)
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typedef int hb_mutex_impl_t;
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#define HB_MUTEX_IMPL_INIT 0
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#define hb_mutex_impl_init(M) HB_STMT_START {} HB_STMT_END
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#define hb_mutex_impl_lock(M) HB_STMT_START {} HB_STMT_END
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#define hb_mutex_impl_unlock(M) HB_STMT_START {} HB_STMT_END
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#define hb_mutex_impl_finish(M) HB_STMT_START {} HB_STMT_END
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#else
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#error "Could not find any system to define mutex macros."
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#error "Check hb-mutex.hh for possible resolutions."
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#endif
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#define HB_MUTEX_INIT {HB_MUTEX_IMPL_INIT}
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struct hb_mutex_t
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{
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hb_mutex_impl_t m;
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void init () { hb_mutex_impl_init (&m); }
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void lock () { hb_mutex_impl_lock (&m); }
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void unlock () { hb_mutex_impl_unlock (&m); }
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void fini () { hb_mutex_impl_finish (&m); }
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};
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struct hb_lock_t
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{
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hb_lock_t (hb_mutex_t &mutex_) : mutex (mutex_) { mutex.lock (); }
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~hb_lock_t () { mutex.unlock (); }
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private:
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hb_mutex_t &mutex;
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};
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#endif /* HB_MUTEX_HH */
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