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1.1 root 1: /* semwrap.h */
2:
3: /* Semaphore-related cross-platform development wrappers */
4:
5: /* $Id: semwrap.h,v 1.10 2004/11/10 23:13:09 rswindell Exp $ */
6:
7: /****************************************************************************
8: * @format.tab-size 4 (Plain Text/Source Code File Header) *
9: * @format.use-tabs true (see http://www.synchro.net/ptsc_hdr.html) *
10: * *
11: * Copyright 2004 Rob Swindell - http://www.synchro.net/copyright.html *
12: * *
13: * This library is free software; you can redistribute it and/or *
14: * modify it under the terms of the GNU Lesser General Public License *
15: * as published by the Free Software Foundation; either version 2 *
16: * of the License, or (at your option) any later version. *
17: * See the GNU Lesser General Public License for more details: lgpl.txt or *
18: * http://www.fsf.org/copyleft/lesser.html *
19: * *
20: * Anonymous FTP access to the most recent released source is available at *
21: * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net *
22: * *
23: * Anonymous CVS access to the development source and modification history *
24: * is available at cvs.synchro.net:/cvsroot/sbbs, example: *
25: * cvs -d :pserver:[email protected]:/cvsroot/sbbs login *
26: * (just hit return, no password is necessary) *
27: * cvs -d :pserver:[email protected]:/cvsroot/sbbs checkout src *
28: * *
29: * For Synchronet coding style and modification guidelines, see *
30: * http://www.synchro.net/source.html *
31: * *
32: * You are encouraged to submit any modifications (preferably in Unix diff *
33: * format) via e-mail to [email protected] *
34: * *
35: * Note: If this box doesn't appear square, then you need to fix your tabs. *
36: ****************************************************************************/
37:
38: #ifndef _SEMWRAP_H
39: #define _SEMWRAP_H
40:
41: #include "gen_defs.h"
42:
43: #if defined(__cplusplus)
44: extern "C" {
45: #endif
46:
47: #if defined(__unix__)
48: #if defined(USE_XP_SEMAPHORES)
49: #include "xpsem.h"
50: #define sem_init(x, y, z) xp_sem_init(x, y, z)
51: #define sem_destroy(x) xp_sem_destroy(x)
52: #define sem_close(x) xp_sem_close(x)
53: #define sem_unlink(x) xp_sem_unlink(x)
54: #define sem_wait(x) xp_sem_wait(x)
55: #define sem_trywait(x) xp_sem_trywait(x)
56: #define sem_post(x) xp_sem_post(x)
57: #define sem_getvalue(x,y) xp_sem_getvalue(x,y)
58: #define sem_timedwait(x,y) xp_sem_timedwait(x,y)
59: #define sem_t xp_sem_t
60: #else
61: #include <semaphore.h> /* POSIX semaphores */
62: #endif
63:
64: #elif defined(_WIN32)
65:
66: #include <process.h> /* _beginthread */
67:
68: /* POSIX semaphores */
69: typedef HANDLE sem_t;
70: int sem_init(sem_t*, int pshared, unsigned int value);
71: int sem_post(sem_t*);
72: int sem_getvalue(sem_t*, int* value);
73: int sem_destroy(sem_t*);
74: #define sem_wait(psem) sem_trywait_block(psem,INFINITE)
75: #define sem_trywait(psem) sem_trywait_block(psem,0)
76:
77: #elif defined(__OS2__) /* These have *not* been tested! */
78:
79: /* POSIX semaphores */
80: typedef HEV sem_t;
81: #define sem_init(psem,ps,v) DosCreateEventSem(NULL,psem,0,0);
82: #define sem_wait(psem) DosWaitEventSem(*(psem),-1)
83: #define sem_post(psem) DosPostEventSem(*(psem))
84: #define sem_destroy(psem) DosCloseEventSem(*(psem))
85:
86: #else
87:
88: #error "Need semaphore wrappers."
89:
90: #endif
91:
92: /* NOT POSIX */
93: int sem_trywait_block(sem_t* psem, unsigned long timeout);
94:
95:
96: /* Change semaphore to "unsignaled" (NOT POSIX) */
97: #define sem_reset(psem) while(sem_trywait(psem)==0)
98:
99: #if defined(__cplusplus)
100: }
101: #endif
102:
103: #endif /* Don't add anything after this line */
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