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# cpl_multiproc.h

    00001 /**********************************************************************
    00002  * $Id: cpl_multiproc.h 10646 2007-01-18 02:38:10Z warmerdam $
    00003  *
    00004  * Project:  CPL - Common Portability Library
    00005  * Purpose:  CPL Multi-Threading, and process handling portability functions.
    00006  * Author:   Frank Warmerdam, warmerdam@pobox.com
    00007  *
    00008  **********************************************************************
    00009  * Copyright (c) 2002, Frank Warmerdam
    00010  *
    00011  * Permission is hereby granted, free of charge, to any person obtaining a
    00012  * copy of this software and associated documentation files (the "Software"),
    00013  * to deal in the Software without restriction, including without limitation
    00014  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
    00015  * and/or sell copies of the Software, and to permit persons to whom the
    00016  * Software is furnished to do so, subject to the following conditions:
    00017  *
    00018  * The above copyright notice and this permission notice shall be included
    00019  * in all copies or substantial portions of the Software.
    00020  *
    00021  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    00022  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00023  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
    00024  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00025  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    00026  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    00027  * DEALINGS IN THE SOFTWARE.
    00028  ****************************************************************************/
    00029
    00030 #ifndef _CPL_MULTIPROC_H_INCLUDED_
    00031 #define _CPL_MULTIPROC_H_INCLUDED_
    00032
    00033 #include "cpl_port.h"
    00034
    00035 // There are three primary implementations of the multi-process support
    00036 // controlled by one of CPL_MULTIPROC_WIN32, CPL_MULTIPROC_PTHREAD or
    00037 // CPL_MULTIPROC_STUB being defined.  If none are defined, the stub
    00038 // implementation will be used.
    00039
    00040 #if defined(WIN32) && !defined(CPL_MULTIPROC_STUB)
    00041 #  define CPL_MULTIPROC_WIN32
    00042 #endif
    00043
    00044 #if !defined(CPL_MULTIPROC_WIN32) && !defined(CPL_MULTIPROC_PTHREAD) \
    00045  && !defined(CPL_MULTIPROC_STUB) && !defined(CPL_MULTIPROC_NONE)
    00046 #  define CPL_MULTIPROC_STUB
    00047 #endif
    00048
    00049 CPL_C_START
    00050
    00051 typedef void (*CPLThreadFunc)(void *);
    00052
    00053 void CPL_DLL *CPLLockFile( const char *pszPath, double dfWaitInSeconds );
    00054 void  CPL_DLL CPLUnlockFile( void *hLock );
    00055
    00056 void CPL_DLL *CPLCreateMutex();
    00057 int   CPL_DLL CPLCreateOrAcquireMutex( void **, double dfWaitInSeconds );
    00058 int   CPL_DLL CPLAcquireMutex( void *hMutex, double dfWaitInSeconds );
    00059 void  CPL_DLL CPLReleaseMutex( void *hMutex );
    00060 void  CPL_DLL CPLDestroyMutex( void *hMutex );
    00061
    00062 int   CPL_DLL CPLGetPID();
    00063 int   CPL_DLL CPLCreateThread( CPLThreadFunc pfnMain, void *pArg );
    00064 void  CPL_DLL CPLSleep( double dfWaitInSeconds );
    00065
    00066 const char CPL_DLL *CPLGetThreadingModel();
    00067
    00068 CPL_C_END
    00069
    00070 #ifdef __cplusplus
    00071
    00072 #define CPLMutexHolderD(x)  CPLMutexHolder oHolder(x,1000.0,__FILE__,__LINE__);
    00073
    00074 class CPLMutexHolder
    00075 {
    00076   private:
    00077     void       *hMutex;
    00078     const char *pszFile;
    00079     int         nLine;
    00080
    00081   public:
    00082
    00083     CPLMutexHolder( void **phMutex, double dfWaitInSeconds = 1000.0,
    00084                     const char *pszFile = __FILE__,
    00085                     int nLine = __LINE__ );
    00086     ~CPLMutexHolder();
    00087 };
    00088 #endif /* def __cplusplus */
    00089
    00090 /* -------------------------------------------------------------------- */
    00091 /*      Thread local storage.                                           */
    00092 /* -------------------------------------------------------------------- */
    00093
    00094 #define CTLS_RLBUFFERINFO               1         /* cpl_conv.cpp */
    00095 #define CTLS_DECDMSBUFFER               2         /* cpl_conv.cpp */
    00096 #define CTLS_CSVTABLEPTR                3         /* cpl_csv.cpp */
    00097 #define CTLS_CSVDEFAULTFILENAME         4         /* cpl_csv.cpp */
    00098 #define CTLS_ERRORCONTEXT               5         /* cpl_error.cpp */
    00099 #define CTLS_FINDERINFO                 6         /* cpl_finder.cpp */
    00100 #define CTLS_PATHBUF                    7         /* cpl_path.cpp */
    00101 #define CTLS_SPRINTFBUF                 8         /* cpl_string.cpp */
    00102
    00103 #define CTLS_MAX                       32
    00104
    00105 CPL_C_START
    00106 void CPL_DLL * CPLGetTLS( int nIndex );
    00107 void CPL_DLL CPLSetTLS( int nIndex, void *pData, int bFreeOnExit );
    00108 void CPL_DLL CPLCleanupTLS();
    00109 CPL_C_END
    00110
    00111 #endif /* _CPL_MULTIPROC_H_INCLUDED_ */

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