55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
/***********************************************************************/
|
|
/* */
|
|
/* Objective Caml */
|
|
/* */
|
|
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
|
|
/* */
|
|
/* Copyright 1996 Institut National de Recherche en Informatique et */
|
|
/* en Automatique. All rights reserved. This file is distributed */
|
|
/* under the terms of the GNU Library General Public License, with */
|
|
/* the special exception on linking described in file ../../LICENSE. */
|
|
/* */
|
|
/***********************************************************************/
|
|
|
|
/* $Id$ */
|
|
|
|
#include <string.h>
|
|
#include <mlvalues.h>
|
|
#include <memory.h>
|
|
#include <signals.h>
|
|
#include "unixsupport.h"
|
|
|
|
CAMLprim value unix_read(value fd, value buf, value ofs, value vlen)
|
|
{
|
|
intnat len;
|
|
DWORD numbytes, numread;
|
|
char iobuf[UNIX_BUFFER_SIZE];
|
|
DWORD err = 0;
|
|
|
|
Begin_root (buf);
|
|
len = Long_val(vlen);
|
|
numbytes = len > UNIX_BUFFER_SIZE ? UNIX_BUFFER_SIZE : len;
|
|
if (Descr_kind_val(fd) == KIND_SOCKET) {
|
|
int ret;
|
|
SOCKET s = Socket_val(fd);
|
|
enter_blocking_section();
|
|
ret = recv(s, iobuf, numbytes, 0);
|
|
if (ret == SOCKET_ERROR) err = WSAGetLastError();
|
|
leave_blocking_section();
|
|
numread = ret;
|
|
} else {
|
|
HANDLE h = Handle_val(fd);
|
|
enter_blocking_section();
|
|
if (! ReadFile(h, iobuf, numbytes, &numread, NULL))
|
|
err = GetLastError();
|
|
leave_blocking_section();
|
|
}
|
|
if (err) {
|
|
win32_maperr(err);
|
|
uerror("read", Nothing);
|
|
}
|
|
memmove (&Byte(buf, Long_val(ofs)), iobuf, numread);
|
|
End_roots();
|
|
return Val_int(numread);
|
|
}
|