diff options
author | sanine <sanine.not@pm.me> | 2022-08-25 14:54:53 -0500 |
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committer | sanine <sanine.not@pm.me> | 2022-08-25 14:54:53 -0500 |
commit | 37c97e345d12f95dde44e1d1a4c2f2aadd4615bc (patch) | |
tree | e1bb25bc855883062bdd7847ff2c04290f71c840 /portaudio/src/common/pa_allocation.h | |
parent | 5634c7b04da619669f2f29f6798c03982be05180 (diff) |
add initial structure
Diffstat (limited to 'portaudio/src/common/pa_allocation.h')
-rw-r--r-- | portaudio/src/common/pa_allocation.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/portaudio/src/common/pa_allocation.h b/portaudio/src/common/pa_allocation.h new file mode 100644 index 0000000..5c3cf53 --- /dev/null +++ b/portaudio/src/common/pa_allocation.h @@ -0,0 +1,104 @@ +#ifndef PA_ALLOCATION_H +#define PA_ALLOCATION_H +/* + * $Id$ + * Portable Audio I/O Library allocation context header + * memory allocation context for tracking allocation groups + * + * Based on the Open Source API proposed by Ross Bencina + * Copyright (c) 1999-2008 Ross Bencina, Phil Burk + * + * 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, sublicense, 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 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 NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 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. + */ + +/* + * The text above constitutes the entire PortAudio license; however, + * the PortAudio community also makes the following non-binding requests: + * + * Any person wishing to distribute modifications to the Software is + * requested to send the modifications to the original developer so that + * they can be incorporated into the canonical version. It is also + * requested that these non-binding requests be included along with the + * license above. + */ + +/** @file + @ingroup common_src + + @brief Allocation Group prototypes. An Allocation Group makes it easy to + allocate multiple blocks of memory and free them all at once. + + An allocation group is useful for keeping track of multiple blocks + of memory which are allocated at the same time (such as during initialization) + and need to be deallocated at the same time. The allocation group maintains + a list of allocated blocks, and can free all allocations at once. This + can be useful for cleaning up after a partially initialized object fails. + + The allocation group implementation is built on top of the lower + level allocation functions defined in pa_util.h +*/ + + +#ifdef __cplusplus +extern "C" +{ +#endif /* __cplusplus */ + + +typedef struct +{ + long linkCount; + struct PaUtilAllocationGroupLink *linkBlocks; + struct PaUtilAllocationGroupLink *spareLinks; + struct PaUtilAllocationGroupLink *allocations; +}PaUtilAllocationGroup; + + + +/** Create an allocation group. +*/ +PaUtilAllocationGroup* PaUtil_CreateAllocationGroup( void ); + +/** Destroy an allocation group, but not the memory allocated through the group. +*/ +void PaUtil_DestroyAllocationGroup( PaUtilAllocationGroup* group ); + +/** Allocate a block of memory though an allocation group. +*/ +void* PaUtil_GroupAllocateMemory( PaUtilAllocationGroup* group, long size ); + +/** Free a block of memory that was previously allocated though an allocation + group. Calling this function is a relatively time consuming operation. + Under normal circumstances clients should call PaUtil_FreeAllAllocations to + free all allocated blocks simultaneously. + @see PaUtil_FreeAllAllocations +*/ +void PaUtil_GroupFreeMemory( PaUtilAllocationGroup* group, void *buffer ); + +/** Free all blocks of memory which have been allocated through the allocation + group. This function doesn't destroy the group itself. +*/ +void PaUtil_FreeAllAllocations( PaUtilAllocationGroup* group ); + + +#ifdef __cplusplus +} +#endif /* __cplusplus */ +#endif /* PA_ALLOCATION_H */ |