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  1. /****************************************************************************
  2. *
  3. *                            Open Watcom Project
  4. *
  5. *    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
  6. *
  7. *  ========================================================================
  8. *
  9. *    This file contains Original Code and/or Modifications of Original
  10. *    Code as defined in and that are subject to the Sybase Open Watcom
  11. *    Public License version 1.0 (the 'License'). You may not use this file
  12. *    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
  13. *    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
  14. *    provided with the Original Code and Modifications, and is also
  15. *    available at www.sybase.com/developer/opensource.
  16. *
  17. *    The Original Code and all software distributed under the License are
  18. *    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  19. *    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
  20. *    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
  21. *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
  22. *    NON-INFRINGEMENT. Please see the License for the specific language
  23. *    governing rights and limitations under the License.
  24. *
  25. *  ========================================================================
  26. *
  27. * Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
  28. *               DESCRIBE IT HERE!
  29. *
  30. ****************************************************************************/
  31.  
  32.  
  33. #include "variety.h"
  34. #include <stdio.h>
  35. #include <errno.h>
  36.  
  37. #include "iomode.h"
  38. #include "fileacc.h"
  39. #include "rtcheck.h"
  40. #include "rtdata.h"
  41. #include "seterrno.h"
  42. #include "qwrite.h"
  43. #include "liballoc.h"
  44. #include "kolibri.h"
  45.  
  46. /*
  47.     Use caution when setting the file pointer in a multithreaded
  48.     application. You must synchronize access to shared resources. For
  49.     example, an application whose threads share a file handle, update the
  50.     file pointer, and read from the file must protect this sequence by
  51.     using a critical section object or a mutex object.
  52.  */
  53.  
  54. typedef struct
  55. {
  56.   char     *name;
  57.   unsigned int offset;
  58. }__file_handle;
  59.  
  60. char* getfullpath(const char* path);
  61.  
  62. int __qwrite( int handle, const void *buffer, unsigned len )
  63. {
  64.     int             atomic;
  65.     __file_handle   *fh;
  66.     unsigned        len_written;
  67.  
  68.     __handle_check( handle, -1 );
  69.  
  70.     fh = (__file_handle*) __getOSHandle( handle );
  71.  
  72.     atomic = 0;
  73.     if( __GetIOMode( handle ) & _APPEND )
  74.     {
  75.       FILEINFO info;
  76.        
  77.       _AccessFileH( handle );
  78.       atomic = 1;
  79.       get_fileinfo(fh->name,&info);
  80.       fh->offset = info.size;
  81.     };
  82.  
  83.     if(write_file(fh->name,buffer,fh->offset,len,&len_written))
  84.     {
  85.       if ( len_written == 0)
  86.       {
  87.         if( atomic == 1 )
  88.           _ReleaseFileH( handle );
  89.  
  90.         return (-1);
  91.       };  
  92.     };
  93.    
  94.     fh->offset+=len_written;
  95.        
  96.  
  97.     if( atomic == 1 )
  98.     {
  99.         _ReleaseFileH( handle );
  100.     }
  101.     return( len_written );
  102. }
  103.  
  104. /********************
  105. int write_once(const char *name, void *buffer, unsigned len)
  106. {   char *path;
  107.     unsigned count;
  108.  
  109.     path= getfullpath(name);
  110.     write_file(path,buffer,0,len,&count);
  111.     lib_free(path);
  112.     return count;
  113.          
  114. }
  115.  
  116. *******************/
  117.