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pipe-win32: possible fix for Windows XP deadlock

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This fixes a hang with the VirtualBox OpenGL drivers. It might help
with #1325 as well.
This commit is contained in:
James Ross-Gowan 2014-12-11 23:20:35 +11:00
parent d01cf36c74
commit 8a270250e8
1 changed files with 10 additions and 0 deletions
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10
input/pipe-win32.c
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@ -45,6 +45,16 @@ static void read_pipe_thread(struct mp_input_src *src, void *param)
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");