mesa: add DisjointOperation to gl_shared_state

This state will be used by EXT_disjoint_timer_query. As first
usage, patch sets DisjointOperation true when gpu reset happens.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

src/mesa/main/mtypes.h

@@ -3310,6 +3310,14 @@ struct gl_shared_state
    /** EXT_external_objects */
    struct _mesa_HashTable *MemoryObjects;
 
+   /**
+    * Some context in this share group was affected by a disjoint
+    * operation. This operation can be anything that has effects on
+    * values of timer queries in such manner that they become invalid for
+    * performance metrics. As example gpu reset, counter overflow or gpu
+    * frequency changes.
+    */
+   bool DisjointOperation;
 };
 
 

src/mesa/main/robustness.c

@@ -145,6 +145,7 @@ _mesa_GetGraphicsResetStatusARB( void )
        */
       if (status != GL_NO_ERROR) {
          ctx->Shared->ShareGroupReset = true;
+         ctx->Shared->DisjointOperation = true;
       } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
          status = GL_INNOCENT_CONTEXT_RESET_ARB;
       }