source/libs/cairo/cairo-src/src/cairo-mutex-type-private.h

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright © 2002 University of Southern California
   4  * Copyright © 2005,2007 Red Hat, Inc.
   5  * Copyright © 2007 Mathias Hasselmann
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it either under the terms of the GNU Lesser General Public
   9  * License version 2.1 as published by the Free Software Foundation
  10  * (the "LGPL") or, at your option, under the terms of the Mozilla
  11  * Public License Version 1.1 (the "MPL"). If you do not alter this
  12  * notice, a recipient may use your version of this file under either
  13  * the MPL or the LGPL.
  14  *
  15  * You should have received a copy of the LGPL along with this library
  16  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  18  * You should have received a copy of the MPL along with this library
  19  * in the file COPYING-MPL-1.1
  20  *
  21  * The contents of this file are subject to the Mozilla Public License
  22  * Version 1.1 (the "License"); you may not use this file except in
  23  * compliance with the License. You may obtain a copy of the License at
  24  * http://www.mozilla.org/MPL/
  25  *
  26  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  27  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  28  * the specific language governing rights and limitations.
  29  *
  30  * The Original Code is the cairo graphics library.
  31  *
  32  * The Initial Developer of the Original Code is University of Southern
  33  * California.
  34  *
  35  * Contributor(s):
  36  *      Carl D. Worth <cworth@cworth.org>
  37  *      Mathias Hasselmann <mathias.hasselmann@gmx.de>
  38  *      Behdad Esfahbod <behdad@behdad.org>
  39  */
  40
  41 #ifndef CAIRO_MUTEX_TYPE_PRIVATE_H
  42 #define CAIRO_MUTEX_TYPE_PRIVATE_H
  43
  44 #include "cairo-compiler-private.h"
  45 #include "cairo-mutex-impl-private.h"
  46
  47 /* Only the following four are mandatory at this point */
  48 #ifndef CAIRO_MUTEX_IMPL_LOCK
  49 # error "CAIRO_MUTEX_IMPL_LOCK not defined.  Check cairo-mutex-impl-private.h."
  50 #endif
  51 #ifndef CAIRO_MUTEX_IMPL_UNLOCK
  52 # error "CAIRO_MUTEX_IMPL_UNLOCK not defined.  Check cairo-mutex-impl-private.h."
  53 #endif
  54 #ifndef CAIRO_MUTEX_IMPL_NIL_INITIALIZER
  55 # error "CAIRO_MUTEX_IMPL_NIL_INITIALIZER not defined.  Check cairo-mutex-impl-private.h."
  56 #endif
  57 #ifndef CAIRO_RECURSIVE_MUTEX_IMPL_INIT
  58 # error "CAIRO_RECURSIVE_MUTEX_IMPL_INIT not defined.  Check cairo-mutex-impl-private.h."
  59 #endif
  60
  61
  62 /* make sure implementations don't fool us: we decide these ourself */
  63 #undef _CAIRO_MUTEX_IMPL_USE_STATIC_INITIALIZER
  64 #undef _CAIRO_MUTEX_IMPL_USE_STATIC_FINALIZER
  65
  66
  67 #ifdef CAIRO_MUTEX_IMPL_INIT
  68
  69 /* If %CAIRO_MUTEX_IMPL_INIT is defined, we may need to initialize all
  70  * static mutex'es. */
  71 # ifndef CAIRO_MUTEX_IMPL_INITIALIZE
  72 #  define CAIRO_MUTEX_IMPL_INITIALIZE() do {    \
  73        if (!_cairo_mutex_initialized)   \
  74            _cairo_mutex_initialize ();  \
  75     } while(0)
  76
  77 /* and make sure we implement the above */
  78 #  define _CAIRO_MUTEX_IMPL_USE_STATIC_INITIALIZER 1
  79 # endif /* CAIRO_MUTEX_IMPL_INITIALIZE */
  80
  81 #else /* no CAIRO_MUTEX_IMPL_INIT */
  82
  83 /* Otherwise we probably don't need to initialize static mutex'es, */
  84 # ifndef CAIRO_MUTEX_IMPL_INITIALIZE
  85 #  define CAIRO_MUTEX_IMPL_INITIALIZE() CAIRO_MUTEX_IMPL_NOOP
  86 # endif /* CAIRO_MUTEX_IMPL_INITIALIZE */
  87
  88 /* and dynamic ones can be initialized using the static initializer. */
  89 # define CAIRO_MUTEX_IMPL_INIT(mutex) do {                              \
  90       cairo_mutex_t _tmp_mutex = CAIRO_MUTEX_IMPL_NIL_INITIALIZER;      \
  91       memcpy (&(mutex), &_tmp_mutex, sizeof (_tmp_mutex));      \
  92   } while (0)
  93
  94 #endif /* CAIRO_MUTEX_IMPL_INIT */
  95
  96 #ifdef CAIRO_MUTEX_IMPL_FINI
  97
  98 /* If %CAIRO_MUTEX_IMPL_FINI is defined, we may need to finalize all
  99  * static mutex'es. */
 100 # ifndef CAIRO_MUTEX_IMPL_FINALIZE
 101 #  define CAIRO_MUTEX_IMPL_FINALIZE() do {      \
 102        if (_cairo_mutex_initialized)    \
 103            _cairo_mutex_finalize ();    \
 104     } while(0)
 105
 106 /* and make sure we implement the above */
 107 #  define _CAIRO_MUTEX_IMPL_USE_STATIC_FINALIZER 1
 108 # endif /* CAIRO_MUTEX_IMPL_FINALIZE */
 109
 110 #else /* no CAIRO_MUTEX_IMPL_FINI */
 111
 112 /* Otherwise we probably don't need to finalize static mutex'es, */
 113 # ifndef CAIRO_MUTEX_IMPL_FINALIZE
 114 #  define CAIRO_MUTEX_IMPL_FINALIZE() CAIRO_MUTEX_IMPL_NOOP
 115 # endif /* CAIRO_MUTEX_IMPL_FINALIZE */
 116
 117 /* neither do the dynamic ones. */
 118 # define CAIRO_MUTEX_IMPL_FINI(mutex)   CAIRO_MUTEX_IMPL_NOOP1(mutex)
 119
 120 #endif /* CAIRO_MUTEX_IMPL_FINI */
 121
 122
 123 #ifndef _CAIRO_MUTEX_IMPL_USE_STATIC_INITIALIZER
 124 #define _CAIRO_MUTEX_IMPL_USE_STATIC_INITIALIZER 0
 125 #endif
 126 #ifndef _CAIRO_MUTEX_IMPL_USE_STATIC_FINALIZER
 127 #define _CAIRO_MUTEX_IMPL_USE_STATIC_FINALIZER 0
 128 #endif
 129
 130
 131 /* Make sure everything we want is defined */
 132 #ifndef CAIRO_MUTEX_IMPL_INITIALIZE
 133 # error "CAIRO_MUTEX_IMPL_INITIALIZE not defined"
 134 #endif
 135 #ifndef CAIRO_MUTEX_IMPL_FINALIZE
 136 # error "CAIRO_MUTEX_IMPL_FINALIZE not defined"
 137 #endif
 138 #ifndef CAIRO_MUTEX_IMPL_LOCK
 139 # error "CAIRO_MUTEX_IMPL_LOCK not defined"
 140 #endif
 141 #ifndef CAIRO_MUTEX_IMPL_UNLOCK
 142 # error "CAIRO_MUTEX_IMPL_UNLOCK not defined"
 143 #endif
 144 #ifndef CAIRO_MUTEX_IMPL_INIT
 145 # error "CAIRO_MUTEX_IMPL_INIT not defined"
 146 #endif
 147 #ifndef CAIRO_MUTEX_IMPL_FINI
 148 # error "CAIRO_MUTEX_IMPL_FINI not defined"
 149 #endif
 150 #ifndef CAIRO_MUTEX_IMPL_NIL_INITIALIZER
 151 # error "CAIRO_MUTEX_IMPL_NIL_INITIALIZER not defined"
 152 #endif
 153
 154
 155 /* Public interface. */
 156
 157 /* By default it simply uses the implementation provided.
 158  * But we can provide for debugging features by overriding them */
 159
 160 #ifndef CAIRO_MUTEX_DEBUG
 161 typedef cairo_mutex_impl_t cairo_mutex_t;
 162 typedef cairo_recursive_mutex_impl_t cairo_recursive_mutex_t;
 163 #else
 164 # define cairo_mutex_t                  cairo_mutex_impl_t
 165 #endif
 166
 167 #define CAIRO_MUTEX_INITIALIZE          CAIRO_MUTEX_IMPL_INITIALIZE
 168 #define CAIRO_MUTEX_FINALIZE            CAIRO_MUTEX_IMPL_FINALIZE
 169 #define CAIRO_MUTEX_LOCK                CAIRO_MUTEX_IMPL_LOCK
 170 #define CAIRO_MUTEX_UNLOCK              CAIRO_MUTEX_IMPL_UNLOCK
 171 #define CAIRO_MUTEX_INIT                CAIRO_MUTEX_IMPL_INIT
 172 #define CAIRO_MUTEX_FINI                CAIRO_MUTEX_IMPL_FINI
 173 #define CAIRO_MUTEX_NIL_INITIALIZER     CAIRO_MUTEX_IMPL_NIL_INITIALIZER
 174
 175 #define CAIRO_RECURSIVE_MUTEX_INIT              CAIRO_RECURSIVE_MUTEX_IMPL_INIT
 176 #define CAIRO_RECURSIVE_MUTEX_NIL_INITIALIZER   CAIRO_RECURSIVE_MUTEX_IMPL_NIL_INITIALIZER
 177
 178 #ifndef CAIRO_MUTEX_IS_LOCKED
 179 # define CAIRO_MUTEX_IS_LOCKED(name) 1
 180 #endif
 181 #ifndef CAIRO_MUTEX_IS_UNLOCKED
 182 # define CAIRO_MUTEX_IS_UNLOCKED(name) 1
 183 #endif
 184
 185
 186 /* Debugging support */
 187
 188 #ifdef CAIRO_MUTEX_DEBUG
 189
 190 /* TODO add mutex debugging facilities here (eg deadlock detection) */
 191
 192 #endif /* CAIRO_MUTEX_DEBUG */
 193
 194 #endif