From 82dd0225e7e21a35ca66d439dce8cfa39d782470 Mon Sep 17 00:00:00 2001
From: José Fonseca <jrfonseca@tungstengraphics.com>
Date: Thu, 8 May 2008 15:28:42 +0900
Subject: pipebuffer: Preliminary buffer validation.

Use table to store a list of buffers to validate. Unfortunately cso_hash
shrinks/regrows the hash every time, so still has to be addressed.

Multi-thread validation is still WIP.
---
 src/gallium/auxiliary/pipebuffer/pb_validate.c | 170 +++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 src/gallium/auxiliary/pipebuffer/pb_validate.c

(limited to 'src/gallium/auxiliary/pipebuffer/pb_validate.c')

diff --git a/src/gallium/auxiliary/pipebuffer/pb_validate.c b/src/gallium/auxiliary/pipebuffer/pb_validate.c
new file mode 100644
index 0000000000..a0a0965a46
--- /dev/null
+++ b/src/gallium/auxiliary/pipebuffer/pb_validate.c
@@ -0,0 +1,170 @@
+/**************************************************************************
+ *
+ * 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
+ * Buffer validation.
+ * 
+ * @author Jose Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_error.h"
+#include "pipe/p_util.h"
+#include "pipe/p_debug.h"
+
+#include "util/u_hash_table.h"
+
+#include "pb_buffer.h"
+#include "pb_buffer_fenced.h"
+
+
+struct pb_validate
+{
+   struct hash_table *buffer_table;
+};
+
+
+static unsigned buffer_table_hash(void *pb_buf) 
+{
+   return (unsigned)(uintptr_t)pb_buf;
+}
+
+
+static int buffer_table_compare(void *pb_buf1, void *pb_buf2)
+{
+   return (char *)pb_buf2 - (char *)pb_buf1; 
+}
+
+
+enum pipe_error
+pb_validate_add_buffer(struct pb_validate *vl,
+                       struct pb_buffer *buf)
+{
+   enum pipe_error ret;
+   
+   assert(buf);
+   if(!buf)
+      return PIPE_ERROR;
+   
+   if(!hash_table_get(vl->buffer_table, buf)) {
+      struct pb_buffer *tmp = NULL;
+      
+      ret = hash_table_set(vl->buffer_table, buf, buf);
+      if(ret != PIPE_OK)
+	 return ret;
+      
+      /* Increment reference count */
+      pb_reference(&tmp, buf);
+   }
+   
+   return PIPE_OK;
+}
+
+
+enum pipe_error
+pb_validate_validate(struct pb_validate *vl) 
+{
+   /* FIXME: go through each buffer, ensure its not mapped, its address is 
+    * available -- requires a new pb_buffer interface */
+   return PIPE_OK;
+}
+
+
+struct pb_validate_fence_data {
+   struct pb_validate *vl;
+   struct pipe_fence_handle *fence;
+};
+
+
+static enum pipe_error
+pb_validate_fence_cb(void *key, void *value, void *_data) 
+{
+   struct pb_buffer *buf = (struct pb_buffer *)key;
+   struct pb_validate_fence_data *data = (struct pb_validate_fence_data *)_data;
+   struct pb_validate *vl = data->vl;
+   struct pipe_fence_handle *fence = data->fence;
+   
+   assert(value == key);
+   
+   buffer_fence(buf, fence);
+   
+   /* Decrement the reference count -- table entry destroyed later */
+   pb_reference(&buf, NULL);
+   
+   return PIPE_OK;
+}
+
+
+void
+pb_validate_fence(struct pb_validate *vl,
+                  struct pipe_fence_handle *fence)
+{
+   struct pb_validate_fence_data data;
+   
+   data.vl = vl;
+   data.fence = fence;
+   
+   hash_table_foreach(vl->buffer_table, 
+                      pb_validate_fence_cb, 
+                      &data);
+
+   /* FIXME: cso_hash shrinks here, which is not desirable in this use case, 
+    * as it will be refilled right soon */ 
+   hash_table_clear(vl->buffer_table);
+}
+
+
+void
+pb_validate_destroy(struct pb_validate *vl)
+{
+   pb_validate_fence(vl, NULL);
+   hash_table_destroy(vl->buffer_table);
+   FREE(vl);
+}
+
+
+struct pb_validate *
+pb_validate_create()
+{
+   struct pb_validate *vl;
+   
+   vl = CALLOC_STRUCT(pb_validate);
+   if(!vl)
+      return NULL;
+   
+   vl->buffer_table = hash_table_create(buffer_table_hash,
+                                        buffer_table_compare);
+   if(!vl->buffer_table) {
+      FREE(vl);
+      return NULL;
+   }
+
+   return vl;
+}
+
-- 
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