thodg/libgit2/src/win32/fileops.c

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• Hash : c79dded3
  Author :
  Date : 2009-06-14T22:13:35
  

  win32: Add an fsync() implementation for windows
  
  For information on FlushFileBuffers(), see the msdn document
  at msdn.microsoft.com/en-us/library/aa364439(VS.85).aspx
  
  Note that Windows 2000 is shown as the minimum windows version
  to support FlushFileBuffers(), so if we wish to support Win9X
  and NT4, we will need to add code to dynamically check if
  kernel32.dll contains the function.
  
  The only error return mentioned in the msdn document is
  ERROR_INVALID_HANDLE, which is returned if the file/device
  (eg console) is not buffered. The fsync(2) manpage says that
  EINVAL is returned in errno, if "fd is bound to a special
  file which does not support synchronization".
  
  Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
  

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• src/win32/fileops.c

• #define GIT__WIN32_NO_HIDE_FILEOPS
  #include "fileops.h"
  #include <errno.h>
  
  int git__unlink(const char *path)
  {
  	chmod(path, 0666);
  	return unlink(path);
  }
  
  int git__mkstemp(char *template)
  {
  	char *file = mktemp(template);
  	if (file == NULL)
  		return -1;
  	return open(file, O_RDWR | O_CREAT | O_BINARY, 0600);
  }
  
  int git__fsync(int fd)
  {
  	HANDLE fh = (HANDLE)_get_osfhandle(fd);
  
  	if (fh == INVALID_HANDLE_VALUE) {
  		errno = EBADF;
  		return -1;
  	}
  
  	if (!FlushFileBuffers(fh)) {
  		DWORD code = GetLastError();
  
  		if (code == ERROR_INVALID_HANDLE)
  			errno = EINVAL;
  		else
  			errno = EIO;
  
  		return -1;
  	}
  
  	return 0;
  }
  
  

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