mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
591e21a2eb
The standard header is stdatomic.h, so the extra "s" freaks me out every time I look at it.
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <windows.h>
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#include <io.h>
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#include "common/msg.h"
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#include "osdep/atomic.h"
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#include "osdep/io.h"
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#include "input.h"
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struct priv {
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atomic_bool cancel_requested;
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int fd;
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bool close_fd;
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HANDLE file;
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HANDLE thread;
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};
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static void request_cancel(struct mp_input_src *src)
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{
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struct priv *p = src->priv;
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MP_VERBOSE(src, "Exiting...\n");
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atomic_store(&p->cancel_requested, true);
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// The thread might not be peforming I/O at the exact moment when
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// CancelIoEx is called, so call it in a loop until it succeeds or the
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// thread exits
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do {
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if (CancelIoEx(p->file, NULL))
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break;
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} while (WaitForSingleObject(p->thread, 1) != WAIT_OBJECT_0);
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}
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static void uninit(struct mp_input_src *src)
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{
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struct priv *p = src->priv;
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CloseHandle(p->thread);
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if (p->close_fd)
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close(p->fd);
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MP_VERBOSE(src, "Exited.\n");
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}
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static void read_pipe_thread(struct mp_input_src *src, void *param)
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{
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char *filename = talloc_strdup(src, param);
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struct priv *p = talloc_zero(src, struct priv);
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p->fd = -1;
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p->close_fd = true;
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if (strcmp(filename, "/dev/stdin") == 0) { // for symmetry with unix
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p->fd = STDIN_FILENO;
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p->close_fd = false;
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}
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if (p->fd < 0)
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p->fd = open(filename, O_RDONLY);
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if (p->fd < 0) {
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MP_ERR(src, "Can't open %s.\n", filename);
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return;
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}
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p->file = (HANDLE)_get_osfhandle(p->fd);
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if (!p->file || p->file == INVALID_HANDLE_VALUE) {
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MP_ERR(src, "Can't open %s.\n", filename);
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return;
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}
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atomic_store(&p->cancel_requested, false);
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if (!DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
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GetCurrentProcess(), &p->thread, SYNCHRONIZE, FALSE, 0))
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return;
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src->priv = p;
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src->cancel = request_cancel;
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src->uninit = uninit;
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mp_input_src_init_done(src);
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char buffer[4096];
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while (!atomic_load(&p->cancel_requested)) {
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DWORD r;
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if (!ReadFile(p->file, buffer, 4096, &r, NULL)) {
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if (GetLastError() != ERROR_OPERATION_ABORTED)
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MP_ERR(src, "Read operation failed.\n");
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break;
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}
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mp_input_src_feed_cmd_text(src, buffer, r);
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}
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}
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void mp_input_pipe_add(struct input_ctx *ictx, const char *filename)
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{
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mp_input_add_thread_src(ictx, (void *)filename, read_pipe_thread);
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}
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