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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <windows.h>
#include <io.h>
#include "common/msg.h"
#include "osdep/atomics.h"
#include "osdep/io.h"
#include "input.h"
struct priv {
atomic_bool cancel_requested;
int fd;
bool close_fd;
HANDLE file;
HANDLE thread;
};
static void request_cancel(struct mp_input_src *src)
{
struct priv *p = src->priv;
MP_VERBOSE(src, "Exiting...\n");
atomic_store(&p->cancel_requested, true);
// The thread might not be peforming I/O at the exact moment when
// CancelIoEx is called, so call it in a loop until it succeeds or the
// thread exits
do {
if (CancelIoEx(p->file, NULL))
break;
} while (WaitForSingleObject(p->thread, 1) != WAIT_OBJECT_0);
}
static void uninit(struct mp_input_src *src)
{
struct priv *p = src->priv;
CloseHandle(p->thread);
if (p->close_fd)
close(p->fd);
MP_VERBOSE(src, "Exited.\n");
}
static void read_pipe_thread(struct mp_input_src *src, void *param)
{
char *filename = talloc_strdup(src, param);
struct priv *p = talloc_zero(src, struct priv);
p->fd = -1;
p->close_fd = true;
if (strcmp(filename, "/dev/stdin") == 0) { // for symmetry with unix
p->fd = STDIN_FILENO;
p->close_fd = false;
}
if (p->fd < 0)
p->fd = open(filename, O_RDONLY);
if (p->fd < 0) {
MP_ERR(src, "Can't open %s.\n", filename);
return;
}
p->file = (HANDLE)_get_osfhandle(p->fd);
if (!p->file || p->file == INVALID_HANDLE_VALUE) {
MP_ERR(src, "Can't open %s.\n", filename);
return;
}
atomic_store(&p->cancel_requested, false);
if (!DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
GetCurrentProcess(), &p->thread, SYNCHRONIZE, FALSE, 0))
return;
src->priv = p;
src->cancel = request_cancel;
src->uninit = uninit;
mp_input_src_init_done(src);
char buffer[4096];
while (!atomic_load(&p->cancel_requested)) {
DWORD r;
if (!ReadFile(p->file, buffer, 4096, &r, NULL)) {
if (GetLastError() != ERROR_OPERATION_ABORTED)
MP_ERR(src, "Read operation failed.\n");
break;
}
mp_input_src_feed_cmd_text(src, buffer, r);
}
}
void mp_input_pipe_add(struct input_ctx *ictx, const char *filename)
{
mp_input_add_thread_src(ictx, (void *)filename, read_pipe_thread);
}
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