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, 3 insertions, 3 deletions

diff --git a/hw/xfree86/common/xf86Init.c b/hw/xfree86/common/xf86Init.c
index 66c668980..cf726d4a0 100644
--- a/hw/xfree86/common/xf86Init.c
+++ b/hw/xfree86/common/xf86Init.c
@@ -762,7 +762,7 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
             ioctl(xf86Info.consoleFd, VT_RELDISP, VT_ACKACQ);
 #endif
             xf86AccessEnter();
-            OsBlockSIGIO();
+            input_lock();
             sigio_blocked = TRUE;
         }
     }
@@ -864,7 +864,7 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
 
     xf86VGAarbiterWrapFunctions();
     if (sigio_blocked)
-        OsReleaseSIGIO();
+        input_unlock();
 
     xf86InitOrigins();
 
@@ -1010,7 +1010,7 @@ AbortDDX(enum ExitCode error)
 {
     int i;
 
-    OsBlockSIGIO();
+    input_lock();
 
     /*
      * try to restore the original video state