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semaphore.h
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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_SEMAPHORE_LEVEL
43
44 #if defined(_POSIX_SOURCE)
45 #define PTW32_SEMAPHORE_LEVEL 0
46 /* Early POSIX */
47 #endif
48
49 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309
50 #undef PTW32_SEMAPHORE_LEVEL
51 #define PTW32_SEMAPHORE_LEVEL 1
52 /* Include 1b, 1c and 1d */
53 #endif
54
55 #if defined(INCLUDE_NP)
56 #undef PTW32_SEMAPHORE_LEVEL
57 #define PTW32_SEMAPHORE_LEVEL 2
58 /* Include Non-Portable extensions */
59 #endif
60
61 #define PTW32_SEMAPHORE_LEVEL_MAX 3
62
63 #if !defined(PTW32_SEMAPHORE_LEVEL)
64 #define PTW32_SEMAPHORE_LEVEL PTW32_SEMAPHORE_LEVEL_MAX
65 /* Include everything */
66 #endif
67
68 #if defined(__GNUC__) && ! defined (__declspec)
69 # error Please upgrade your GNU compiler to one that supports __declspec.
70 #endif
71
72 /*
73 * When building the library, you should define PTW32_BUILD so that
74 * the variables/functions are exported correctly. When using the library,
75 * do NOT define PTW32_BUILD, and then the variables/functions will
76 * be imported correctly.
77 */
78 #if !defined(PTW32_STATIC_LIB)
79 # if defined(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 #if !defined(PTW32_CONFIG_H)
94 # if defined(WINCE)
95 # define NEED_ERRNO
96 # define NEED_SEM
97 # endif
98 # if defined(__MINGW64__)
99 # define HAVE_STRUCT_TIMESPEC
100 # define HAVE_MODE_T
101 # elif defined(_UWIN) || defined(__MINGW32__)
102 # define HAVE_MODE_T
103 # endif
104 #endif
105
106 /*
107 *
108 */
109
110 #if PTW32_SEMAPHORE_LEVEL >= PTW32_SEMAPHORE_LEVEL_MAX
111 #if defined(NEED_ERRNO)
112 #include "need_errno.h"
113 #else
114 #include <errno.h>
115 #endif
116 #endif /* PTW32_SEMAPHORE_LEVEL >= PTW32_SEMAPHORE_LEVEL_MAX */
117
118 #define _POSIX_SEMAPHORES
119
120 #if defined(__cplusplus)
121 extern "C"
122 {
123 #endif /* __cplusplus */
124
125 #if !defined(HAVE_MODE_T)
126 typedef unsigned int mode_t;
127 #endif
128
129
130 typedef struct sem_t_ * sem_t;
131
132 PTW32_DLLPORT int __cdecl sem_init (sem_t * sem,
133 int pshared,
134 unsigned int value);
135
136 PTW32_DLLPORT int __cdecl sem_destroy (sem_t * sem);
137
138 PTW32_DLLPORT int __cdecl sem_trywait (sem_t * sem);
139
140 PTW32_DLLPORT int __cdecl sem_wait (sem_t * sem);
141
142 PTW32_DLLPORT int __cdecl sem_timedwait (sem_t * sem,
143 const struct timespec * abstime);
144
145 PTW32_DLLPORT int __cdecl sem_post (sem_t * sem);
146
147 PTW32_DLLPORT int __cdecl sem_post_multiple (sem_t * sem,
148 int count);
149
150 PTW32_DLLPORT int __cdecl sem_open (const char * name,
151 int oflag,
152 mode_t mode,
153 unsigned int value);
154
155 PTW32_DLLPORT int __cdecl sem_close (sem_t * sem);
156
157 PTW32_DLLPORT int __cdecl sem_unlink (const char * name);
158
159 PTW32_DLLPORT int __cdecl sem_getvalue (sem_t * sem,
160 int * sval);
161
162 #if defined(__cplusplus)
163 } /* End of extern "C" */
164 #endif /* __cplusplus */
165
166 #undef PTW32_SEMAPHORE_LEVEL
167 #undef PTW32_SEMAPHORE_LEVEL_MAX
168
169 #endif /* !SEMAPHORE_H */
PTW32_DLLPORT
#define PTW32_DLLPORT
Definition: semaphore.h:82
sem_unlink
PTW32_DLLPORT int __cdecl sem_unlink(const char *name)
Definition: sem_unlink.c:54
sem_close
PTW32_DLLPORT int __cdecl sem_close(sem_t *sem)
Definition: sem_close.c:54
__cdecl
#define __cdecl
Definition: need_errno.h:49
sem_init
PTW32_DLLPORT int __cdecl sem_init(sem_t *sem, int pshared, unsigned int value)
Definition: sem_init.c:47
sem_post_multiple
PTW32_DLLPORT int __cdecl sem_post_multiple(sem_t *sem, int count)
Definition: sem_post_multiple.c:50
sem_trywait
PTW32_DLLPORT int __cdecl sem_trywait(sem_t *sem)
Definition: sem_trywait.c:50
mode_t
unsigned int mode_t
Definition: semaphore.h:126
sem_t
struct sem_t_ * sem_t
Definition: semaphore.h:130
abstime
struct timespec abstime
Definition: rwlock6_t2.c:50
need_errno.h
sem_getvalue
PTW32_DLLPORT int __cdecl sem_getvalue(sem_t *sem, int *sval)
Definition: sem_getvalue.c:50
sem_post
PTW32_DLLPORT int __cdecl sem_post(sem_t *sem)
Definition: sem_post.c:50
sem_timedwait
PTW32_DLLPORT int __cdecl sem_timedwait(sem_t *sem, const struct timespec *abstime)
Definition: sem_timedwait.c:98
sem_wait
PTW32_DLLPORT int __cdecl sem_wait(sem_t *sem)
Definition: sem_wait.c:83
sem_t_::value
int value
Definition: implement.h:211
sem_t_::sem
HANDLE sem
Definition: implement.h:213
sem_t_
Definition: implement.h:209
timespec
Definition: pthread.h:320
sem_open
PTW32_DLLPORT int __cdecl sem_open(const char *name, int oflag, mode_t mode, unsigned int value)
Definition: sem_open.c:54
sem_destroy
PTW32_DLLPORT int __cdecl sem_destroy(sem_t *sem)
Definition: sem_destroy.c:50