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#include <pthread.h>
#include <stdio.h>
#include <windows.h>
#include <io.h>
#include <stdint.h>
#include <waio/waio.h>
#include "common/msg.h"
#include "osdep/io.h"
#include "input.h"
static void request_cancel(struct mp_input_src *src)
{
HANDLE terminate = src->priv;
MP_VERBOSE(src, "Exiting...\n");
SetEvent(terminate);
}
static void uninit(struct mp_input_src *src)
{
HANDLE terminate = src->priv;
CloseHandle(terminate);
MP_VERBOSE(src, "Exited.\n");
}
static void read_pipe_thread(struct mp_input_src *src, void *param)
{
char *filename = talloc_strdup(src, param);
struct waio_cx_interface *waio = NULL;
int mode = O_RDONLY;
int fd = -1;
bool close_fd = true;
if (strcmp(filename, "/dev/stdin") == 0) { // for symmetry with unix
fd = STDIN_FILENO;
close_fd = false;
}
if (fd < 0)
fd = open(filename, mode);
if (fd < 0) {
MP_ERR(src, "Can't open %s.\n", filename);
goto done;
}
// If we're reading from stdin, unset it. All I/O on synchronous handles is
// serialized, so stupid DLLs that call GetFileType on stdin can hang the
// process if they do it while we're reading from it. At least, the
// VirtualBox OpenGL ICD is affected by this, but only on Windows XP.
// GetFileType works differently in later versions of Windows. See:
// https://support.microsoft.com/kb/2009703
// http://blogs.msdn.com/b/oldnewthing/archive/2011/12/02/10243553.aspx
if ((void*)_get_osfhandle(fd) == GetStdHandle(STD_INPUT_HANDLE))
SetStdHandle(STD_INPUT_HANDLE, NULL);
waio = waio_alloc((void *)_get_osfhandle(fd), 0, NULL, NULL);
if (!waio) {
MP_ERR(src, "Can't initialize win32 file reader.\n");
goto done;
}
HANDLE terminate = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!terminate)
goto done;
src->priv = terminate;
src->cancel = request_cancel;
src->uninit = uninit;
mp_input_src_init_done(src);
char buffer[128];
struct waio_aiocb cb = {
.aio_buf = buffer,
.aio_nbytes = sizeof(buffer),
.hsignal = terminate,
};
while (1) {
if (waio_read(waio, &cb)) {
MP_ERR(src, "Read operation failed.\n");
break;
}
if (waio_suspend(waio, (const struct waio_aiocb *[]){&cb}, 1, NULL))
break;
ssize_t r = waio_return(waio, &cb);
if (r <= 0)
break; // EOF or error
mp_input_src_feed_cmd_text(src, buffer, r);
}
done:
waio_free(waio);
if (close_fd)
close(fd);
}
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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