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1.1 ! root 1: /* semwrap.c */ ! 2: ! 3: /* Semaphore-related cross-platform development wrappers */ ! 4: ! 5: /* $Id: semwrap.c,v 1.12 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 2003 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: #include <errno.h> ! 39: #include "semwrap.h" ! 40: ! 41: #if defined(__unix__) ! 42: ! 43: #include <sys/time.h> /* timespec */ ! 44: #include <stdlib.h> /* NULL */ ! 45: ! 46: int ! 47: sem_trywait_block(sem_t *sem, unsigned long timeout) ! 48: { ! 49: int retval; ! 50: struct timespec abstime; ! 51: struct timeval currtime; ! 52: ! 53: gettimeofday(&currtime,NULL); ! 54: abstime.tv_sec=currtime.tv_sec + (currtime.tv_usec/1000 + timeout)/1000; ! 55: abstime.tv_nsec=(currtime.tv_usec*1000 + timeout*1000000)%1000000000; ! 56: ! 57: retval=sem_timedwait(sem, &abstime); ! 58: if(retval && errno==ETIMEDOUT) ! 59: errno=EAGAIN; ! 60: return retval; ! 61: } ! 62: ! 63: #elif defined(_WIN32) ! 64: ! 65: #include <limits.h> /* INT_MAX */ ! 66: ! 67: #if defined(__BORLANDC__) ! 68: #pragma argsused ! 69: #endif ! 70: int sem_init(sem_t* psem, int pshared, unsigned int value) ! 71: { ! 72: ! 73: if((*(psem)=CreateSemaphore(NULL,value,INT_MAX,NULL))==NULL) ! 74: return -1; ! 75: ! 76: return 0; ! 77: } ! 78: ! 79: int sem_trywait_block(sem_t* psem, unsigned long timeout) ! 80: { ! 81: if(WaitForSingleObject(*(psem),timeout)!=WAIT_OBJECT_0) { ! 82: errno=EAGAIN; ! 83: return -1; ! 84: } ! 85: ! 86: return 0; ! 87: } ! 88: ! 89: int sem_post(sem_t* psem) ! 90: { ! 91: if(ReleaseSemaphore(*(psem),1,NULL)==TRUE) ! 92: return 0; ! 93: ! 94: return -1; ! 95: } ! 96: ! 97: int sem_getvalue(sem_t* psem, int* vp) ! 98: { ! 99: ReleaseSemaphore(*(psem),0,(LPLONG)vp); ! 100: return 0; ! 101: } ! 102: ! 103: int sem_destroy(sem_t* psem) ! 104: { ! 105: if(CloseHandle(*(psem))==TRUE) ! 106: return 0; ! 107: return -1; ! 108: } ! 109: ! 110: #endif /* _WIN32 */
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