91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/***********************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../../LICENSE. */
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/* */
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/***********************************************************************/
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#include <mlvalues.h>
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#include <alloc.h>
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#include <io.h>
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#include <memory.h>
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#include "unixsupport.h"
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#include <fcntl.h>
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extern intptr_t _get_osfhandle(int);
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extern int _open_osfhandle(intptr_t, int);
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int win_CRT_fd_of_filedescr(value handle)
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{
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if (CRT_fd_val(handle) != NO_CRT_FD) {
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return CRT_fd_val(handle);
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} else {
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int fd = _open_osfhandle((intptr_t) Handle_val(handle), O_BINARY);
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if (fd == -1) uerror("channel_of_descr", Nothing);
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CRT_fd_val(handle) = fd;
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return fd;
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}
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}
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CAMLprim value win_inchannel_of_filedescr(value handle)
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{
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CAMLparam1(handle);
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CAMLlocal1(vchan);
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struct channel * chan;
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chan = caml_open_descriptor_in(win_CRT_fd_of_filedescr(handle));
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if (Descr_kind_val(handle) == KIND_SOCKET)
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chan->flags |= CHANNEL_FLAG_FROM_SOCKET;
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vchan = caml_alloc_channel(chan);
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CAMLreturn(vchan);
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}
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CAMLprim value win_outchannel_of_filedescr(value handle)
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{
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CAMLparam1(handle);
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CAMLlocal1(vchan);
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int fd;
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struct channel * chan;
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chan = caml_open_descriptor_out(win_CRT_fd_of_filedescr(handle));
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if (Descr_kind_val(handle) == KIND_SOCKET)
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chan->flags |= CHANNEL_FLAG_FROM_SOCKET;
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vchan = caml_alloc_channel(chan);
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CAMLreturn(vchan);
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}
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CAMLprim value win_filedescr_of_channel(value vchan)
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{
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CAMLparam1(vchan);
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CAMLlocal1(fd);
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struct channel * chan;
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HANDLE h;
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chan = Channel(vchan);
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if (chan->fd == -1) uerror("descr_of_channel", Nothing);
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h = (HANDLE) _get_osfhandle(chan->fd);
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if (chan->flags & CHANNEL_FLAG_FROM_SOCKET)
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fd = win_alloc_socket((SOCKET) h);
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else
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fd = win_alloc_handle(h);
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CRT_fd_val(fd) = chan->fd;
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CAMLreturn(fd);
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}
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CAMLprim value win_handle_fd(value vfd)
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{
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int crt_fd = Int_val(vfd);
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/* PR#4750: do not use the _or_socket variant as it can cause performance
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degradation and this function is only used with the standard
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handles 0, 1, 2, which are not sockets. */
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value res = win_alloc_handle((HANDLE) _get_osfhandle(crt_fd));
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CRT_fd_val(res) = crt_fd;
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return res;
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}
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