forked from KolibriOS/kolibrios
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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* DESCRIBE IT HERE!
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*
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****************************************************************************/
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#include "variety.h"
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#include <stdio.h>
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#include <errno.h>
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#include "iomode.h"
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#include "fileacc.h"
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#include "rtcheck.h"
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#include "rtdata.h"
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#include "seterrno.h"
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#include "qwrite.h"
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#include "liballoc.h"
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#include "kolibri.h"
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/*
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Use caution when setting the file pointer in a multithreaded
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application. You must synchronize access to shared resources. For
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example, an application whose threads share a file handle, update the
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file pointer, and read from the file must protect this sequence by
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using a critical section object or a mutex object.
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*/
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typedef struct
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{
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char *name;
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unsigned int offset;
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}__file_handle;
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char* getfullpath(const char* path);
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int __qwrite( int handle, const void *buffer, unsigned len )
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{
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int atomic;
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__file_handle *fh;
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unsigned len_written;
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__handle_check( handle, -1 );
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fh = (__file_handle*) __getOSHandle( handle );
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atomic = 0;
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if( __GetIOMode( handle ) & _APPEND )
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{
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FILEINFO info;
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_AccessFileH( handle );
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atomic = 1;
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get_fileinfo(fh->name,&info);
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fh->offset = info.size;
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};
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if(write_file(fh->name,buffer,fh->offset,len,&len_written))
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{
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if ( len_written == 0)
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{
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if( atomic == 1 )
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_ReleaseFileH( handle );
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return (-1);
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};
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};
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fh->offset+=len_written;
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if( atomic == 1 )
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{
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_ReleaseFileH( handle );
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}
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return( len_written );
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}
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/********************
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int write_once(const char *name, void *buffer, unsigned len)
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{ char *path;
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unsigned count;
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path= getfullpath(name);
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write_file(path,buffer,0,len,&count);
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lib_free(path);
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return count;
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}
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*******************/
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