llvmpipe: added new lp_memory.[ch] files

Functions for using dummy tiles when we detect OOM conditions.

src/gallium/drivers/llvmpipe/Makefile

@@ -18,6 +18,7 @@ C_SOURCES = \
 	lp_fence.c \
 	lp_flush.c \
 	lp_jit.c \
+	lp_memory.c \
 	lp_perf.c \
 	lp_query.c \
 	lp_rast.c \

src/gallium/drivers/llvmpipe/SConscript

@@ -38,6 +38,7 @@ llvmpipe = env.ConvenienceLibrary(
 		'lp_fence.c',
 		'lp_flush.c',
 		'lp_jit.c',
+		'lp_memory.c',
 		'lp_perf.c',
 		'lp_query.c',
 		'lp_rast.c',

src/gallium/drivers/llvmpipe/lp_memory.c

@@ -0,0 +1,54 @@
+/**************************************************************************
+ * 
+ * Copyright 2010 VMware, Inc.  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 VMWARE 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.
+ * 
+ **************************************************************************/
+
+
+#include "util/u_debug.h"
+#include "lp_limits.h"
+#include "lp_memory.h"
+
+
+/** 32bpp RGBA dummy tile to use in out of memory conditions */
+static PIPE_ALIGN_VAR(16) uint8_t lp_dummy_tile[TILE_SIZE * TILE_SIZE * 4];
+
+static unsigned lp_out_of_memory = 0;
+
+
+uint8_t *
+lp_get_dummy_tile(void)
+{
+   if (lp_out_of_memory++ < 10) {
+      debug_printf("llvmpipe: out of memory.  Using dummy tile memory.\n");
+   }
+   return lp_dummy_tile;
+}
+
+
+boolean
+lp_is_dummy_tile(void *tile)
+{
+   return tile == lp_dummy_tile;
+}
+

src/gallium/drivers/llvmpipe/lp_memory.h

@@ -0,0 +1,43 @@
+/**************************************************************************
+ * 
+ * Copyright 2010 VMware, Inc.  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 VMWARE 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.
+ * 
+ **************************************************************************/
+
+
+#ifndef LP_MEMORY_H
+#define LP_MEMORY_H
+
+
+#include "pipe/p_compiler.h"
+
+
+extern uint8_t *
+lp_get_dummy_tile(void);
+
+
+extern boolean
+lp_is_dummy_tile(void *tile);
+
+
+#endif /* LP_MEMORY_H */