/* * 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. */ #ifndef _OBJECT_HEAP_H_ #define _OBJECT_HEAP_H_ #define OBJECT_HEAP_OFFSET_MASK 0x7F000000 #define OBJECT_HEAP_ID_MASK 0x00FFFFFF typedef struct object_base *object_base_p; typedef struct object_heap *object_heap_p; struct object_base { int id; int next_free; }; struct object_heap { int object_size; int id_offset; void *heap_index; int next_free; int heap_size; int heap_increment; }; typedef int object_heap_iterator; /* * Return 0 on success, -1 on error */ int object_heap_init( object_heap_p heap, int object_size, int id_offset); /* * Allocates an object * Returns the object ID on success, returns -1 on error */ int object_heap_allocate( object_heap_p heap ); /* * Lookup an allocated 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 ); /* * 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 ); /* * 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 ); /* * Frees an object */ void object_heap_free( object_heap_p heap, object_base_p obj ); /* * Destroys a heap, the heap must be empty. */ void object_heap_destroy( object_heap_p heap ); #endif /* _OBJECT_HEAP_H_ */

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