Remove SIGIO support for input [v5]

This removes all of the SIGIO handling support used for input
throughout the X server, preparing the way for using threads for input
handling instead.

Places calling OsBlockSIGIO and OsReleaseSIGIO are marked with calls
to stub functions input_lock/input_unlock so that we don't lose this
information.

xfree86 SIGIO support is reworked to use internal versions of
OsBlockSIGIO and OsReleaseSIGIO.

v2: Don't change locking order (Peter Hutterer)
v3: Comment weird && FALSE in xf86Helper.c
    Leave errno save/restore in xf86ReadInput
    Squash with stub adding patch (Peter Hutterer)
v4: Leave UseSIGIO config parameter so that
    existing config files don't break (Peter Hutterer)
v5: Split a couple of independent patch bits out
    of kinput.c (Peter Hutterer)

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/xkb/xkbActions.c b/xkb/xkbActions.c
index aeb702c63..afe5edf0d 100644
--- a/xkb/xkbActions.c
+++ b/xkb/xkbActions.c
@@ -1526,7 +1526,7 @@ InjectPointerKeyEvents(DeviceIntPtr dev, int type, int button, int flags,
         return;
 
     events = InitEventList(GetMaximumEventsNum() + 1);
-    OsBlockSignals();
+    input_lock();
     pScreen = miPointerGetScreen(ptr);
     saveWait = miPointerSetWaitForUpdate(pScreen, FALSE);
     nevents = GetPointerEvents(events, ptr, type, button, flags, mask);
@@ -1534,7 +1534,7 @@ InjectPointerKeyEvents(DeviceIntPtr dev, int type, int button, int flags,
         UpdateFromMaster(&events[nevents], lastSlave, DEVCHANGE_POINTER_EVENT,
                          &nevents);
     miPointerSetWaitForUpdate(pScreen, saveWait);
-    OsReleaseSignals();
+    input_unlock();
 
     for (i = 0; i < nevents; i++)
         mieqProcessDeviceEvent(ptr, &events[i], NULL);