[gegl] opencl: if there is a serious error, just disable opencl

[Victor Matheus de Araujo Oliveira <vmaolive src gnome org>]

commit 7b1846d65711e96f60a363266e3cae8238ff76df
Author: Victor Oliveira <victormatheus gmail com>
Date:   Fri Jan 11 22:40:35 2013 -0200

    opencl: if there is a serious error, just disable opencl

 gegl/buffer/gegl-buffer-cl-iterator.c |    6 ++++++
 gegl/opencl/gegl-cl-init.c            |    6 ++++++
 gegl/opencl/gegl-cl-init.h            |    2 ++
 3 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-cl-iterator.c b/gegl/buffer/gegl-buffer-cl-iterator.c
index fb7b92f..8f36975 100644
--- a/gegl/buffer/gegl-buffer-cl-iterator.c
+++ b/gegl/buffer/gegl-buffer-cl-iterator.c
@@ -34,6 +34,8 @@
 #include "gegl-tile-storage.h"
 #include "gegl-utils.h"
 
+#include "opencl/gegl-cl.h"
+
 #define CL_ERROR {GEGL_NOTE (GEGL_DEBUG_OPENCL, "Error in %s:%d %s - %s\n", __FILE__, __LINE__, __func__, gegl_cl_errstring(cl_err)); goto error;}
 
 typedef struct GeglBufferClIterators
@@ -594,6 +596,10 @@ error:
         i->tex_op [no][j] = NULL;
       }
 
+  /* something pretty bad happened, so it's better to just disable opencl at all for next operations */
+  GEGL_NOTE (GEGL_DEBUG_OPENCL, "Error: Disabling OpenCL!");
+  gegl_cl_disable();
+
   *err = TRUE;
   return FALSE;
 }
diff --git a/gegl/opencl/gegl-cl-init.c b/gegl/opencl/gegl-cl-init.c
index 6a3bc42..c8dafbf 100644
--- a/gegl/opencl/gegl-cl-init.c
+++ b/gegl/opencl/gegl-cl-init.c
@@ -138,6 +138,12 @@ gegl_cl_is_accelerated (void)
   return cl_state.is_accelerated && gegl_config()->use_opencl;
 }
 
+void
+gegl_cl_disable (void)
+{
+  cl_state.is_accelerated = FALSE;
+}
+
 cl_platform_id
 gegl_cl_get_platform (void)
 {
diff --git a/gegl/opencl/gegl-cl-init.h b/gegl/opencl/gegl-cl-init.h
index 2a707f4..16746aa 100644
--- a/gegl/opencl/gegl-cl-init.h
+++ b/gegl/opencl/gegl-cl-init.h
@@ -27,6 +27,8 @@ gboolean          gegl_cl_init (GError **error);
 
 gboolean          gegl_cl_is_accelerated (void);
 
+void              gegl_cl_disable (void);
+
 cl_platform_id    gegl_cl_get_platform (void);
 
 cl_device_id      gegl_cl_get_device (void);