glx: MakeCurrent fixes.

1) If MakeContextCurrent is called with (NULL, None, None), Don't
   send the request to the X server if the current context is direct.
2) Return BadMatch in some error cases according to the glx spec.
3) If MakeContextCurrent is called for a context which is current in
   another thread, return BadAccess according to the glx spec.

Signed-off-by: Thomas Hellstrom <thellstrom-at-vmware-dot-com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/glx/x11/glxclient.h b/src/glx/x11/glxclient.h
index fa3ec26e60..bf68d0f891 100644
--- a/src/glx/x11/glxclient.h
+++ b/src/glx/x11/glxclient.h
@@ -426,6 +426,11 @@ struct __GLXcontextRec {
    int server_minor;        /**< Minor version number. */
     /*@}*/
 
+   /**
+    * Thread ID we're currently current in. Zero if none.
+    */
+   unsigned long thread_id;
+
     char gl_extension_bits[ __GL_EXT_BYTES ];
 };