source: vbox/trunk/src/libs/xpcom18a4/nsprpub/lib/ds/plarenas.h@ 95259

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#if defined(PLARENAS_H)
#else  /* defined(PLARENAS_H) */
#define PLARENAS_H

#ifdef VBOX_WITH_XPCOM_NAMESPACE_CLEANUP
#define PL_ArenaAllocate VBoxNsplPL_ArenaAllocate
#define PL_ArenaFinish VBoxNsplPL_ArenaFinish
#define PL_ArenaGrow VBoxNsplPL_ArenaGrow
#define PL_ArenaRelease VBoxNsplPL_ArenaRelease
#define PL_CompactArenaPool VBoxNsplPL_CompactArenaPool
#define PL_FinishArenaPool VBoxNsplPL_FinishArenaPool
#define PL_FreeArenaPool VBoxNsplPL_FreeArenaPool
#define PL_InitArenaPool VBoxNsplPL_InitArenaPool
#endif /* VBOX_WITH_XPCOM_NAMESPACE_CLEANUP */

PR_BEGIN_EXTERN_C

typedef struct PLArenaPool      PLArenaPool;

/*
** Allocate an arena pool as specified by the parameters.
**
** This is equivelant to allocating the space yourself and then
** calling PL_InitArenaPool().
**
** This function may fail (and return a NULL) for a variety of
** reasons. The reason for a particular failure can be discovered
** by calling PR_GetError().
*/
#if 0  /* Not implemented */
PR_EXTERN(PLArenaPool*) PL_AllocArenaPool(
    const char *name, PRUint32 size, PRUint32 align);
#endif

/*
** Destroy an arena pool previously allocated by PL_AllocArenaPool().
**
** This function may fail if the arena is not empty and the caller
** wishes to check for empty upon descruction.
*/
#if 0  /* Not implemented */
PR_EXTERN(PRStatus) PL_DestroyArenaPool(PLArenaPool *pool, PRBool checkEmpty);
#endif


/*
** Initialize an arena pool with the given name for debugging and metering,
** with a minimum size per arena of size bytes.
**/
PR_EXTERN(void) PL_InitArenaPool(
    PLArenaPool *pool, const char *name, PRUint32 size, PRUint32 align);

/*
** Finish using arenas, freeing all memory associated with them.
**/
PR_EXTERN(void) PL_ArenaFinish(void);

/*
** Free the arenas in pool.  The user may continue to allocate from pool
** after calling this function.  There is no need to call PL_InitArenaPool()
** again unless PL_FinishArenaPool(pool) has been called.
**/
PR_EXTERN(void) PL_FreeArenaPool(PLArenaPool *pool);

/*
** Free the arenas in pool and finish using it altogether.
**/
PR_EXTERN(void) PL_FinishArenaPool(PLArenaPool *pool);

/*
** Compact all of the arenas in a pool so that no space is wasted.
**/
PR_EXTERN(void) PL_CompactArenaPool(PLArenaPool *pool);

/*
** Friend functions used by the PL_ARENA_*() macros.
**/
PR_EXTERN(void *) PL_ArenaAllocate(PLArenaPool *pool, PRUint32 nb);

PR_EXTERN(void *) PL_ArenaGrow(
    PLArenaPool *pool, void *p, PRUint32 size, PRUint32 incr);

PR_EXTERN(void) PL_ArenaRelease(PLArenaPool *pool, char *mark);

PR_END_EXTERN_C

#endif /* defined(PLARENAS_H) */

/* plarenas */