summaryrefslogtreecommitdiff
path: root/i965_drv_video/object_heap.c
diff options
context:
space:
mode:
Diffstat (limited to 'i965_drv_video/object_heap.c')
-rw-r--r--i965_drv_video/object_heap.c211
1 files changed, 0 insertions, 211 deletions
diff --git a/i965_drv_video/object_heap.c b/i965_drv_video/object_heap.c
deleted file mode 100644
index 46062fb..0000000
--- a/i965_drv_video/object_heap.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/*
- * Copyright (c) 2007 Intel Corporation. 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 PRECISION INSIGHT 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 "object_heap.h"
-
-#include "assert.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-
-#define ASSERT assert
-
-#define LAST_FREE -1
-#define ALLOCATED -2
-
-/*
- * Expands the heap
- * Return 0 on success, -1 on error
- */
-static int object_heap_expand( object_heap_p heap )
-{
- int i;
- void *new_heap_index;
- int next_free;
- int new_heap_size = heap->heap_size + heap->heap_increment;
-
- new_heap_index = (void *) realloc( heap->heap_index, new_heap_size * heap->object_size );
- if ( NULL == new_heap_index )
- {
- return -1; /* Out of memory */
- }
- heap->heap_index = new_heap_index;
- next_free = heap->next_free;
- for(i = new_heap_size; i-- > heap->heap_size; )
- {
- object_base_p obj = (object_base_p) (heap->heap_index + i * heap->object_size);
- obj->id = i + heap->id_offset;
- obj->next_free = next_free;
- next_free = i;
- }
- heap->next_free = next_free;
- heap->heap_size = new_heap_size;
- return 0; /* Success */
-}
-
-/*
- * Return 0 on success, -1 on error
- */
-int object_heap_init( object_heap_p heap, int object_size, int id_offset)
-{
- heap->object_size = object_size;
- heap->id_offset = id_offset & OBJECT_HEAP_OFFSET_MASK;
- heap->heap_size = 0;
- heap->heap_increment = 16;
- heap->heap_index = NULL;
- heap->next_free = LAST_FREE;
- _i965InitMutex(&heap->mutex);
- return object_heap_expand(heap);
-}
-
-/*
- * Allocates an object
- * Returns the object ID on success, returns -1 on error
- */
-int object_heap_allocate( object_heap_p heap )
-{
- object_base_p obj;
-
- _i965LockMutex(&heap->mutex);
- if ( LAST_FREE == heap->next_free )
- {
- if( -1 == object_heap_expand( heap ) )
- {
- _i965UnlockMutex(&heap->mutex);
- return -1; /* Out of memory */
- }
- }
- ASSERT( heap->next_free >= 0 );
-
- obj = (object_base_p) (heap->heap_index + heap->next_free * heap->object_size);
- heap->next_free = obj->next_free;
- _i965UnlockMutex(&heap->mutex);
-
- obj->next_free = ALLOCATED;
- return obj->id;
-}
-
-/*
- * Lookup an object by object ID
- * Returns a pointer to the object on success, returns NULL on error
- */
-object_base_p object_heap_lookup( object_heap_p heap, int id )
-{
- object_base_p obj;
-
- _i965LockMutex(&heap->mutex);
- if ( (id < heap->id_offset) || (id > (heap->heap_size+heap->id_offset)) )
- {
- _i965UnlockMutex(&heap->mutex);
- return NULL;
- }
- id &= OBJECT_HEAP_ID_MASK;
- obj = (object_base_p) (heap->heap_index + id * heap->object_size);
- _i965UnlockMutex(&heap->mutex);
-
- /* Check if the object has in fact been allocated */
- if ( obj->next_free != ALLOCATED )
- {
- return NULL;
- }
- return obj;
-}
-
-/*
- * Iterate over all objects in the heap.
- * Returns a pointer to the first object on the heap, returns NULL if heap is empty.
- */
-object_base_p object_heap_first( object_heap_p heap, object_heap_iterator *iter )
-{
- *iter = -1;
- return object_heap_next( heap, iter );
-}
-
-/*
- * Iterate over all objects in the heap.
- * Returns a pointer to the next object on the heap, returns NULL if heap is empty.
- */
-object_base_p object_heap_next( object_heap_p heap, object_heap_iterator *iter )
-{
- object_base_p obj;
- int i = *iter + 1;
- _i965LockMutex(&heap->mutex);
- while ( i < heap->heap_size)
- {
- obj = (object_base_p) (heap->heap_index + i * heap->object_size);
- if (obj->next_free == ALLOCATED)
- {
- _i965UnlockMutex(&heap->mutex);
- *iter = i;
- return obj;
- }
- i++;
- }
- _i965UnlockMutex(&heap->mutex);
- *iter = i;
- return NULL;
-}
-
-
-
-/*
- * Frees an object
- */
-void object_heap_free( object_heap_p heap, object_base_p obj )
-{
- /* Don't complain about NULL pointers */
- if (NULL != obj)
- {
- /* Check if the object has in fact been allocated */
- ASSERT( obj->next_free == ALLOCATED );
-
- _i965LockMutex(&heap->mutex);
- obj->next_free = heap->next_free;
- heap->next_free = obj->id & OBJECT_HEAP_ID_MASK;
- _i965UnlockMutex(&heap->mutex);
- }
-}
-
-/*
- * Destroys a heap, the heap must be empty.
- */
-void object_heap_destroy( object_heap_p heap )
-{
- object_base_p obj;
- int i;
-
- _i965DestroyMutex(&heap->mutex);
-
- /* Check if heap is empty */
- for (i = 0; i < heap->heap_size; i++)
- {
- /* Check if object is not still allocated */
- obj = (object_base_p) (heap->heap_index + i * heap->object_size);
- ASSERT( obj->next_free != ALLOCATED );
- }
- free(heap->heap_index);
- heap->heap_size = 0;
- heap->heap_index = NULL;
- heap->next_free = LAST_FREE;
-}
View Lorry Controller Status