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/***********************************************************************/
/* */
/* OCaml */
/* */
/* 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 <mlvalues.h>
#include <alloc.h>
#include <io.h>
#include <memory.h>
#include "unixsupport.h"
#include <fcntl.h>
extern intptr_t _get_osfhandle(int);
extern int _open_osfhandle(intptr_t, int);
int win_CRT_fd_of_filedescr(value handle)
{
if (CRT_fd_val(handle) != NO_CRT_FD) {
return CRT_fd_val(handle);
} else {
int fd = _open_osfhandle((intptr_t) Handle_val(handle), O_BINARY);
if (fd == -1) uerror("channel_of_descr", Nothing);
CRT_fd_val(handle) = fd;
return fd;
}
}
CAMLprim value win_inchannel_of_filedescr(value handle)
{
CAMLparam1(handle);
CAMLlocal1(vchan);
struct channel * chan;
chan = caml_open_descriptor_in(win_CRT_fd_of_filedescr(handle));
if (Descr_kind_val(handle) == KIND_SOCKET)
chan->flags |= CHANNEL_FLAG_FROM_SOCKET;
vchan = caml_alloc_channel(chan);
CAMLreturn(vchan);
}
CAMLprim value win_outchannel_of_filedescr(value handle)
{
CAMLparam1(handle);
CAMLlocal1(vchan);
int fd;
struct channel * chan;
chan = caml_open_descriptor_out(win_CRT_fd_of_filedescr(handle));
if (Descr_kind_val(handle) == KIND_SOCKET)
chan->flags |= CHANNEL_FLAG_FROM_SOCKET;
vchan = caml_alloc_channel(chan);
CAMLreturn(vchan);
}
CAMLprim value win_filedescr_of_channel(value vchan)
{
CAMLparam1(vchan);
CAMLlocal1(fd);
struct channel * chan;
HANDLE h;
chan = Channel(vchan);
if (chan->fd == -1) uerror("descr_of_channel", Nothing);
h = (HANDLE) _get_osfhandle(chan->fd);
if (chan->flags & CHANNEL_FLAG_FROM_SOCKET)
fd = win_alloc_socket((SOCKET) h);
else
fd = win_alloc_handle(h);
CRT_fd_val(fd) = chan->fd;
CAMLreturn(fd);
}
CAMLprim value win_handle_fd(value vfd)
{
int crt_fd = Int_val(vfd);
/* PR#4750: do not use the _or_socket variant as it can cause performance
degradation and this function is only used with the standard
handles 0, 1, 2, which are not sockets. */
value res = win_alloc_handle((HANDLE) _get_osfhandle(crt_fd));
CRT_fd_val(res) = crt_fd;
return res;
}
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