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96 lines
3.5 KiB
C
96 lines
3.5 KiB
C
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#ifndef PA_ALLOCATION_H
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#define PA_ALLOCATION_H
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/*
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* $Id$
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* Portable Audio I/O Library allocation context header
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* memory allocation context for tracking allocation groups
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*
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* Based on the Open Source API proposed by Ross Bencina
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* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/** @file
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@brief Allocation Group prototypes. An Allocation Group makes it easy to
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allocate multiple blocks of memory and free them all simultanously.
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An allocation group is useful for keeping track of multiple blocks
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of memory which are allocated at the same time (such as during initialization)
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and need to be deallocated at the same time. The allocation group maintains
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a list of allocated blocks, and can deallocate them all simultaneously which
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can be usefull for cleaning up after a partially initialized object fails.
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The allocation group implementation is built on top of the lower
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level allocation functions defined in pa_util.h
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*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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typedef struct
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{
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long linkCount;
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struct PaUtilAllocationGroupLink *linkBlocks;
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struct PaUtilAllocationGroupLink *spareLinks;
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struct PaUtilAllocationGroupLink *allocations;
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}PaUtilAllocationGroup;
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/** Create an allocation group.
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*/
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PaUtilAllocationGroup* PaUtil_CreateAllocationGroup( void );
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/** Destroy an allocation group, but not the memory allocated through the group.
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*/
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void PaUtil_DestroyAllocationGroup( PaUtilAllocationGroup* group );
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/** Allocate a block of memory though an allocation group.
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*/
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void* PaUtil_GroupAllocateMemory( PaUtilAllocationGroup* group, long size );
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/** Free a block of memory that was previously allocated though an allocation
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group. Calling this function is a relatively time consuming operation.
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Under normal circumstances clients should call PaUtil_FreeAllAllocations to
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free all allocated blocks simultaneously.
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@see PaUtil_FreeAllAllocations
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*/
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void PaUtil_GroupFreeMemory( PaUtilAllocationGroup* group, void *buffer );
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/** Free all blocks of memory which have been allocated through the allocation
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group. This function doesn't destroy the group itself.
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*/
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void PaUtil_FreeAllAllocations( PaUtilAllocationGroup* group );
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* PA_ALLOCATION_H */
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