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82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef PLARENAS_H
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#define PLARENAS_H
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PR_BEGIN_EXTERN_C
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typedef struct PLArenaPool PLArenaPool;
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/*
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** Initialize an arena pool with the given name for debugging and metering,
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** with a minimum gross size per arena of size bytes. The net size per arena
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** is smaller than the gross size by a header of four pointers plus any
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** necessary padding for alignment.
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**
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** Note: choose a gross size that's a power of two to avoid the heap allocator
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** rounding the size up.
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**/
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PR_EXTERN(void) PL_InitArenaPool(
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PLArenaPool *pool, const char *name, PRUint32 size, PRUint32 align);
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/*
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** Finish using arenas, freeing all memory associated with them.
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**/
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PR_EXTERN(void) PL_ArenaFinish(void);
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/*
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** Free the arenas in pool. The user may continue to allocate from pool
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** after calling this function. There is no need to call PL_InitArenaPool()
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** again unless PL_FinishArenaPool(pool) has been called.
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**/
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PR_EXTERN(void) PL_FreeArenaPool(PLArenaPool *pool);
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/*
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** Free the arenas in pool and finish using it altogether.
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**/
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PR_EXTERN(void) PL_FinishArenaPool(PLArenaPool *pool);
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/*
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** Compact all of the arenas in a pool so that no space is wasted.
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** NOT IMPLEMENTED. Do not use.
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**/
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PR_EXTERN(void) PL_CompactArenaPool(PLArenaPool *pool);
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/*
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** Friend functions used by the PL_ARENA_*() macros.
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**
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** WARNING: do not call these functions directly. Always use the
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** PL_ARENA_*() macros.
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**/
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PR_EXTERN(void *) PL_ArenaAllocate(PLArenaPool *pool, PRUint32 nb);
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PR_EXTERN(void *) PL_ArenaGrow(
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PLArenaPool *pool, void *p, PRUint32 size, PRUint32 incr);
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PR_EXTERN(void) PL_ArenaRelease(PLArenaPool *pool, char *mark);
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/*
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** memset contents of all arenas in pool to pattern
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*/
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PR_EXTERN(void) PL_ClearArenaPool(PLArenaPool *pool, PRInt32 pattern);
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/*
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** A function like malloc_size() or malloc_usable_size() that measures the
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** size of a heap block.
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*/
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typedef size_t (*PLMallocSizeFn)(const void *ptr);
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/*
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** Measure all memory used by a PLArenaPool, excluding the PLArenaPool
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** structure.
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*/
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PR_EXTERN(size_t) PL_SizeOfArenaPoolExcludingPool(
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const PLArenaPool *pool, PLMallocSizeFn mallocSizeOf);
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PR_END_EXTERN_C
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#endif /* PLARENAS_H */
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