1 : /*
2 : * Copyright © 2007 Chris Wilson
3 : * Copyright © 2009,2010 Red Hat, Inc.
4 : * Copyright © 2011 Google, Inc.
5 : *
6 : * This is part of HarfBuzz, a text shaping library.
7 : *
8 : * Permission is hereby granted, without written agreement and without
9 : * license or royalty fees, to use, copy, modify, and distribute this
10 : * software and its documentation for any purpose, provided that the
11 : * above copyright notice and the following two paragraphs appear in
12 : * all copies of this software.
13 : *
14 : * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
15 : * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 : * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
17 : * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 : * DAMAGE.
19 : *
20 : * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
21 : * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 : * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 : * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
24 : * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 : *
26 : * Contributor(s):
27 : * Chris Wilson <chris@chris-wilson.co.uk>
28 : * Red Hat Author(s): Behdad Esfahbod
29 : * Google Author(s): Behdad Esfahbod
30 : */
31 :
32 : #ifndef HB_MUTEX_PRIVATE_HH
33 : #define HB_MUTEX_PRIVATE_HH
34 :
35 : #include "hb-private.hh"
36 :
37 :
38 :
39 : /* mutex */
40 :
41 : /* We need external help for these */
42 :
43 : #ifdef HAVE_GLIB
44 :
45 : #include <glib.h>
46 :
47 : typedef GStaticMutex hb_mutex_impl_t;
48 : #define HB_MUTEX_IMPL_INIT G_STATIC_MUTEX_INIT
49 : #define hb_mutex_impl_init(M) g_static_mutex_init (M)
50 : #define hb_mutex_impl_lock(M) g_static_mutex_lock (M)
51 : #define hb_mutex_impl_unlock(M) g_static_mutex_unlock (M)
52 : #define hb_mutex_impl_free(M) g_static_mutex_free (M)
53 :
54 :
55 : #elif defined(_MSC_VER) || defined(__MINGW32__)
56 :
57 : #include <windows.h>
58 :
59 : typedef CRITICAL_SECTION hb_mutex_impl_t;
60 : #define HB_MUTEX_IMPL_INIT { NULL, 0, 0, NULL, NULL, 0 }
61 : #define hb_mutex_impl_init(M) InitializeCriticalSection (M)
62 : #define hb_mutex_impl_lock(M) EnterCriticalSection (M)
63 : #define hb_mutex_impl_unlock(M) LeaveCriticalSection (M)
64 : #define hb_mutex_impl_free(M) DeleteCriticalSection (M)
65 :
66 :
67 : #else
68 :
69 : #warning "Could not find any system to define platform macros, library will NOT be thread-safe"
70 :
71 : typedef volatile int hb_mutex_impl_t;
72 : #define HB_MUTEX_IMPL_INIT 0
73 : #define hb_mutex_impl_init(M) ((void) (*(M) = 0))
74 : #define hb_mutex_impl_lock(M) ((void) (*(M) = 1))
75 : #define hb_mutex_impl_unlock(M) ((void) (*(M) = 0))
76 : #define hb_mutex_impl_free(M) ((void) (*(M) = 2))
77 :
78 :
79 : #endif
80 :
81 :
82 : struct hb_mutex_t
83 2928 : {
84 : hb_mutex_impl_t m;
85 :
86 2928 : inline void init (void) { hb_mutex_impl_init (&m); }
87 1487 : inline void lock (void) { hb_mutex_impl_lock (&m); }
88 1487 : inline void unlock (void) { hb_mutex_impl_unlock (&m); }
89 2974 : inline void free (void) { hb_mutex_impl_free (&m); }
90 : };
91 :
92 : #define HB_MUTEX_INIT {HB_MUTEX_IMPL_INIT}
93 : #define hb_mutex_init(M) (M)->init ()
94 : #define hb_mutex_lock(M) (M)->lock ()
95 : #define hb_mutex_unlock(M) (M)->unlock ()
96 : #define hb_mutex_free(M) (M)->free ()
97 :
98 :
99 : struct hb_static_mutex_t : hb_mutex_t
100 : {
101 2928 : hb_static_mutex_t (void) { this->init (); }
102 2974 : ~hb_static_mutex_t (void) { this->free (); }
103 :
104 : private:
105 : NO_COPY (hb_static_mutex_t);
106 : };
107 :
108 :
109 :
110 : #endif /* HB_MUTEX_PRIVATE_HH */
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