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1.1 ! root 1: /* threadwrap.c */ ! 2: ! 3: /* Thread-related cross-platform development wrappers */ ! 4: ! 5: /* $Id: threadwrap.c,v 1.22 2005/10/21 00:04:19 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 2005 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: #if defined(__unix__) ! 39: #include <unistd.h> /* _POSIX_THREADS */ ! 40: #include <sys/param.h> /* BSD */ ! 41: #endif ! 42: ! 43: #if defined(_WIN32) && !defined(_WIN32_WINNT) ! 44: #define _WIN32_WINNT 0x0400 /* Needed for TryEnterCriticalSection */ ! 45: #endif ! 46: ! 47: #include "threadwrap.h" /* DLLCALL */ ! 48: ! 49: /****************************************************************************/ ! 50: /* Wrapper for Win32 create/begin thread function */ ! 51: /* Uses POSIX threads */ ! 52: /****************************************************************************/ ! 53: #if defined(__unix__) ! 54: #if defined(_POSIX_THREADS) ! 55: #if defined(__BORLANDC__) ! 56: #pragma argsused ! 57: #endif ! 58: ulong _beginthread(void( *start_address )( void * ) ! 59: ,unsigned stack_size, void *arglist) ! 60: { ! 61: pthread_t thread; ! 62: pthread_attr_t attr; ! 63: size_t default_stack; ! 64: ! 65: pthread_attr_init(&attr); /* initialize attribute structure */ ! 66: ! 67: /* set thread attributes to PTHREAD_CREATE_DETACHED which will ensure ! 68: that thread resources are freed on exit() */ ! 69: pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); ! 70: ! 71: /* Default stack size in BSD is too small for JS stuff */ ! 72: /* Force to at least 256k */ ! 73: #define XPDEV_MIN_THREAD_STACK_SIZE (256*1024) ! 74: if(stack_size==0 && pthread_attr_getstacksize(&attr, &default_stack)==0 ! 75: && default_stack < XPDEV_MIN_THREAD_STACK_SIZE) ! 76: stack_size=XPDEV_MIN_THREAD_STACK_SIZE; ! 77: ! 78: if(stack_size!=0) ! 79: pthread_attr_setstacksize(&attr, stack_size); ! 80: ! 81: if(pthread_create(&thread ! 82: #if defined(__BORLANDC__) /* a (hopefully temporary) work-around */ ! 83: ,NULL ! 84: #else ! 85: ,&attr /* default attributes */ ! 86: #endif ! 87: /* POSIX defines this arg as "void *(*start_address)" */ ! 88: ,(void * (*)(void *)) start_address ! 89: ,arglist)==0) ! 90: return((int) thread /* thread handle */); ! 91: ! 92: return(-1); /* error */ ! 93: } ! 94: #else ! 95: ! 96: #error "Need _beginthread implementation for non-POSIX thread library." ! 97: ! 98: #endif ! 99: ! 100: #endif /* __unix__ */ ! 101: ! 102: /****************************************************************************/ ! 103: /* Wrappers for POSIX thread (pthread) mutexes */ ! 104: /****************************************************************************/ ! 105: pthread_mutex_t pthread_mutex_initializer(void) ! 106: { ! 107: pthread_mutex_t mutex; ! 108: ! 109: pthread_mutex_init(&mutex,NULL); ! 110: ! 111: return(mutex); ! 112: } ! 113: ! 114: #if !defined(_POSIX_THREADS) ! 115: ! 116: #if defined(__BORLANDC__) ! 117: #pragma argsused /* attr arg not used */ ! 118: #endif ! 119: int pthread_mutex_init(pthread_mutex_t* mutex, void* attr) ! 120: { ! 121: #if defined(PTHREAD_MUTEX_AS_WIN32_MUTEX) ! 122: return ((((*mutex)=CreateMutex(/* security */NULL, /* owned */FALSE, /* name */NULL))==NULL) ? -1 : 0); ! 123: #elif defined(_WIN32) /* Win32 Critical Section */ ! 124: InitializeCriticalSection(mutex); ! 125: return 0; /* No error */ ! 126: #elif defined(__OS2__) ! 127: return DosCreateMutexSem(/* name */NULL, mutex, /* attr */0, /* owned */0); ! 128: #endif ! 129: } ! 130: ! 131: int pthread_mutex_lock(pthread_mutex_t* mutex) ! 132: { ! 133: #if defined(PTHREAD_MUTEX_AS_WIN32_MUTEX) ! 134: return (WaitForSingleObject(*mutex, INFINITE)==WAIT_OBJECT_0 ? 0 : EBUSY); ! 135: #elif defined(_WIN32) /* Win32 Critical Section */ ! 136: EnterCriticalSection(mutex); ! 137: return 0; /* No error */ ! 138: #elif defined(__OS2__) ! 139: return DosRequestMutexSem(*mutex, -1 /* SEM_INDEFINITE_WAIT */); ! 140: #endif ! 141: } ! 142: ! 143: int pthread_mutex_trylock(pthread_mutex_t* mutex) ! 144: { ! 145: #if defined(PTHREAD_MUTEX_AS_WIN32_MUTEX) ! 146: return (WaitForSingleObject(*mutex, 0)==WAIT_OBJECT_0 ? 0 : EBUSY); ! 147: #elif defined(_WIN32) /* Win32 Critical Section */ ! 148: /* TryEnterCriticalSection only available on NT4+ :-( */ ! 149: return (TryEnterCriticalSection(mutex) ? 0 : EBUSY); ! 150: #elif defined(__OS2__) ! 151: return DosRequestMutexSem(*mutex, 0 /* SEM_IMMEDIATE_RETURN */); ! 152: #endif ! 153: } ! 154: ! 155: int pthread_mutex_unlock(pthread_mutex_t* mutex) ! 156: { ! 157: #if defined(PTHREAD_MUTEX_AS_WIN32_MUTEX) ! 158: return (ReleaseMutex(*mutex) ? 0 : GetLastError()); ! 159: #elif defined(_WIN32) /* Win32 Critical Section */ ! 160: LeaveCriticalSection(mutex); ! 161: return 0; /* No error */ ! 162: #elif defined(__OS2__) ! 163: return DosReleaseMutexSem(*mutex); ! 164: #endif ! 165: } ! 166: ! 167: int pthread_mutex_destroy(pthread_mutex_t* mutex) ! 168: { ! 169: #if defined(PTHREAD_MUTEX_AS_WIN32_MUTEX) ! 170: return (CloseHandle(*mutex) ? 0 : GetLastError()); ! 171: #elif defined(_WIN32) /* Win32 Critical Section */ ! 172: DeleteCriticalSection(mutex); ! 173: return 0; /* No error */ ! 174: #elif defined(__OS2__) ! 175: return DosCloseMutexSem(*mutex); ! 176: #endif ! 177: } ! 178: ! 179: #endif /* POSIX thread mutexes */
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