41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/***********************************************************************/
|
|
/* */
|
|
/* Objective Caml */
|
|
/* */
|
|
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
|
|
/* */
|
|
/* Copyright 1996 Institut National de Recherche en Informatique et */
|
|
/* Automatique. Distributed only by permission. */
|
|
/* */
|
|
/***********************************************************************/
|
|
|
|
/* $Id$ */
|
|
|
|
#include <string.h>
|
|
#include <mlvalues.h>
|
|
#include <memory.h>
|
|
#include <signals.h>
|
|
#include "unixsupport.h"
|
|
|
|
value unix_read(value fd, value buf, value ofs, value len) /* ML */
|
|
{
|
|
DWORD numbytes, numread;
|
|
BOOL ret;
|
|
char iobuf[UNIX_BUFFER_SIZE];
|
|
HANDLE h = Handle_val(fd);
|
|
|
|
Begin_root (buf);
|
|
numbytes = Long_val(len);
|
|
if (numbytes > UNIX_BUFFER_SIZE) numbytes = UNIX_BUFFER_SIZE;
|
|
enter_blocking_section();
|
|
ret = ReadFile(h, iobuf, numbytes, &numread, NULL);
|
|
leave_blocking_section();
|
|
if (! ret) {
|
|
_dosmaperr(GetLastError());
|
|
uerror("read", Nothing);
|
|
}
|
|
bcopy(iobuf, &Byte(buf, Long_val(ofs)), numread);
|
|
End_roots();
|
|
return Val_int(numread);
|
|
}
|