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)
121extern "C"
122{
123#endif				/* __cplusplus */
124
125#if !defined(HAVE_MODE_T)
126typedef unsigned int mode_t;
127#endif
128
129
130typedef struct sem_t_ * sem_t;
131
132PTW32_DLLPORT int __cdecl sem_init (sem_t * sem,
133			    int pshared,
134			    unsigned int value);
135
136PTW32_DLLPORT int __cdecl sem_destroy (sem_t * sem);
137
138PTW32_DLLPORT int __cdecl sem_trywait (sem_t * sem);
139
140PTW32_DLLPORT int __cdecl sem_wait (sem_t * sem);
141
142PTW32_DLLPORT int __cdecl sem_timedwait (sem_t * sem,
143				 const struct timespec * abstime);
144
145PTW32_DLLPORT int __cdecl sem_post (sem_t * sem);
146
147PTW32_DLLPORT int __cdecl sem_post_multiple (sem_t * sem,
148				     int count);
149
150PTW32_DLLPORT int __cdecl sem_open (const char * name,
151			    int oflag,
152			    mode_t mode,
153			    unsigned int value);
154
155PTW32_DLLPORT int __cdecl sem_close (sem_t * sem);
156
157PTW32_DLLPORT int __cdecl sem_unlink (const char * name);
158
159PTW32_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 */
170