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https://github.com/KolibriOS/kolibrios.git
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94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*
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* Copyright (c) 2007 Intel Corporation. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _OBJECT_HEAP_H_
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#define _OBJECT_HEAP_H_
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#include "i965_mutext.h"
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#define OBJECT_HEAP_OFFSET_MASK 0x7F000000
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#define OBJECT_HEAP_ID_MASK 0x00FFFFFF
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typedef struct object_base *object_base_p;
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typedef struct object_heap *object_heap_p;
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struct object_base {
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int id;
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int next_free;
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};
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struct object_heap {
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int object_size;
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int id_offset;
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int next_free;
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int heap_size;
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int heap_increment;
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_I965Mutex mutex;
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void **bucket;
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int num_buckets;
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};
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typedef int object_heap_iterator;
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/*
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* Return 0 on success, -1 on error
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*/
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int object_heap_init( object_heap_p heap, int object_size, int id_offset);
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/*
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* Allocates an object
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* Returns the object ID on success, returns -1 on error
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*/
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int object_heap_allocate( object_heap_p heap );
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/*
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* Lookup an allocated object by object ID
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* Returns a pointer to the object on success, returns NULL on error
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*/
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object_base_p object_heap_lookup( object_heap_p heap, int id );
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/*
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* Iterate over all objects in the heap.
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* Returns a pointer to the first object on the heap, returns NULL if heap is empty.
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*/
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object_base_p object_heap_first( object_heap_p heap, object_heap_iterator *iter );
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/*
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* Iterate over all objects in the heap.
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* Returns a pointer to the next object on the heap, returns NULL if heap is empty.
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*/
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object_base_p object_heap_next( object_heap_p heap, object_heap_iterator *iter );
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/*
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* Frees an object
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*/
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void object_heap_free( object_heap_p heap, object_base_p obj );
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/*
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* Destroys a heap, the heap must be empty.
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*/
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void object_heap_destroy( object_heap_p heap );
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#endif /* _OBJECT_HEAP_H_ */
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