gallium: Standardize most important error codes.

src/gallium/include/pipe/p_error.h

@@ -0,0 +1,65 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+/**
+ * @file
+ * Gallium error codes.
+ * 
+ * @author José Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+#ifndef P_ERROR_H_
+#define P_ERROR_H_
+
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+   
+/**
+ * Gallium error codes.
+ * 
+ * - A zero value always means success.
+ * - A negative value always means failure.
+ * - The meaning of a positive value is function dependent. 
+ */
+enum pipe_error {
+   PIPE_OK = 0,
+   PIPE_ERROR = -1,    /**< Generic error */
+   PIPE_ERROR_BAD_INPUT = -2, 
+   PIPE_ERROR_OUT_OF_MEMORY = -3,
+   PIPE_ERROR_RETRY = -4
+   /* TODO */
+};
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* P_ERROR_H_ */