1 /*
2 * Module: semaphore.h
3 *
4 * Purpose:
5 * Semaphores aren't actually part of the PThreads standard.
6 * They are defined by the POSIX Standard:
7 *
8 * POSIX 1003.1b-1993 (POSIX.1b)
9 *
10 * --------------------------------------------------------------------------
11 *
12 * Pthreads-win32 - POSIX Threads Library for Win32
13 * Copyright(C) 1998 John E. Bossom
14 * Copyright(C) 1999,2005 Pthreads-win32 contributors
15 *
16 * Contact Email: rpj@callisto.canberra.edu.au
17 *
18 * The current list of contributors is contained
19 * in the file CONTRIBUTORS included with the source
20 * code distribution. The list can also be seen at the
21 * following World Wide Web location:
22 * http://sources.redhat.com/pthreads-win32/contributors.html
23 *
24 * This library is free software; you can redistribute it and/or
25 * modify it under the terms of the GNU Lesser General Public
26 * License as published by the Free Software Foundation; either
27 * version 2 of the License, or (at your option) any later version.
28 *
29 * This library is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 * Lesser General Public License for more details.
33 *
34 * You should have received a copy of the GNU Lesser General Public
35 * License along with this library in the file COPYING.LIB;
36 * if not, write to the Free Software Foundation, Inc.,
37 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
38 */
39 #if !defined( SEMAPHORE_H )
40 #define SEMAPHORE_H
41
42 #undef PTW32_LEVEL
43
44 #if defined(_POSIX_SOURCE)
45 #define PTW32_LEVEL 0
46 /* Early POSIX */
47 #endif
48
49 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309
50 #undef PTW32_LEVEL
51 #define PTW32_LEVEL 1
52 /* Include 1b, 1c and 1d */
53 #endif
54
55 #if defined(INCLUDE_NP)
56 #undef PTW32_LEVEL
57 #define PTW32_LEVEL 2
58 /* Include Non-Portable extensions */
59 #endif
60
61 #define PTW32_LEVEL_MAX 3
62
63 #if !defined(PTW32_LEVEL)
64 #define PTW32_LEVEL PTW32_LEVEL_MAX
65 /* Include everything */
66 #endif
67
68 #if __GNUC__ && ! defined (__declspec)
69 # error Please upgrade your GNU compiler to one that supports __declspec.
70 #endif
71
72 /*
73 * When building the DLL code, you should define PTW32_BUILD so that
74 * the variables/functions are exported correctly. When using the DLL,
75 * do NOT define PTW32_BUILD, and then the variables/functions will
76 * be imported correctly.
77 */
78 #ifndef PTW32_STATIC_LIB
79 # ifdef PTW32_BUILD
80 # define PTW32_DLLPORT __declspec (dllexport)
81 # else
82 # define PTW32_DLLPORT __declspec (dllimport)
83 # endif
84 #else
85 # define PTW32_DLLPORT
86 #endif
87
88 /*
89 * This is a duplicate of what is in the autoconf config.h,
90 * which is only used when building the pthread-win32 libraries.
91 */
92
93 #ifndef PTW32_CONFIG_H
94 # if defined(WINCE)
95 # define NEED_ERRNO
96 # define NEED_SEM
97 # endif
98 # if defined(_UWIN) || defined(__MINGW32__)
99 # define HAVE_MODE_T
100 # endif
101 #endif
102
103 /*
104 *
105 */
106
107 #if PTW32_LEVEL >= PTW32_LEVEL_MAX
108 #ifdef NEED_ERRNO
109 #include "need_errno.h"
110 #else
111 #include <errno.h>
112 #endif
113 #endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */
114
115 #define _POSIX_SEMAPHORES
116
117 #ifdef __cplusplus
118 extern "C"
119 {
120 #endif /* __cplusplus */
121
122 #ifndef HAVE_MODE_T
123 typedef unsigned int mode_t;
124 #endif
125
126
127 typedef struct sem_t_ * sem_t;
128
129 PTW32_DLLPORT int __cdecl sem_init (sem_t * sem,
130 int pshared,
131 unsigned int value);
132
133 PTW32_DLLPORT int __cdecl sem_destroy (sem_t * sem);
134
135 PTW32_DLLPORT int __cdecl sem_trywait (sem_t * sem);
136
137 PTW32_DLLPORT int __cdecl sem_wait (sem_t * sem);
138
139 PTW32_DLLPORT int __cdecl sem_timedwait (sem_t * sem,
140 const struct timespec * abstime);
141
142 PTW32_DLLPORT int __cdecl sem_post (sem_t * sem);
143
144 PTW32_DLLPORT int __cdecl sem_post_multiple (sem_t * sem,
145 int count);
146
147 PTW32_DLLPORT int __cdecl sem_open (const char * name,
148 int oflag,
149 mode_t mode,
150 unsigned int value);
151
152 PTW32_DLLPORT int __cdecl sem_close (sem_t * sem);
153
154 PTW32_DLLPORT int __cdecl sem_unlink (const char * name);
155
156 PTW32_DLLPORT int __cdecl sem_getvalue (sem_t * sem,
157 int * sval);
158
159 #ifdef __cplusplus
160 } /* End of extern "C" */
161 #endif /* __cplusplus */
162
163 #undef PTW32_LEVEL
164 #undef PTW32_LEVEL_MAX
165
166 #endif /* !SEMAPHORE_H */
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