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be97cddd7a
* new files include/pub_tool_groupalloc.h and coregrind/m_groupalloc.c implementing a group allocator (based on helgrind group alloc). * include/Makefile.am coregrind/Makefile.am : added pub_tool_groupalloc.h and m_groupalloc.c * helgrind/libhb_core.c : use pub_tool_groupalloc.h/m_groupalloc.c instead of the local implementation. * include/pub_tool_oset.h coregrind/m_oset.c : new function allowing to create an oset that will use a pool allocator. new function allowing to clone an oset (so as to share the pool alloc) * memcheck/tests/unit_oset.c drd/tests/unit_bitmap.c : modified so that it compiles with the new m_oset.c * memcheck/mc_main.c : use group alloc for MC_Chunk memcheck/mc_include.h : declare the MC_Chunk group alloc * memcheck/mc_main.c : use group alloc for the nodes of the secVBitTable OSet * include/pub_tool_hashtable.h coregrind/m_hashtable.c : pass the free node function in the VG_(HT_destruct). (needed as the hashtable user can allocate a node with its own alloc, the hash table destroy must be able to free the nodes with the user own free). * coregrind/m_gdbserver/m_gdbserver.c : pass free function to VG_(HT_destruct) * memcheck/mc_replace_strmem.c memcheck/mc_machine.c memcheck/mc_malloc_wrappers.c memcheck/mc_leakcheck.c memcheck/mc_errors.c memcheck/mc_translate.c : new include needed due to group alloc. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12341
95 lines
3.8 KiB
C
95 lines
3.8 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- A simple pool (memory) allocator. pub_tool_poolalloc.h ---*/
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/*--------------------------------------------------------------------*/
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2011-2012 OpenWorks LLP info@open-works.co.uk,
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Philippe Waroquiers philippe.waroquiers@skynet.be
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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#ifndef __PUB_TOOL_GROUPALLOC_H
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#define __PUB_TOOL_GROUPALLOC_H
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//--------------------------------------------------------------------
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// PURPOSE: Provides efficient allocation and free of elements of
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// the same size.
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// This pool allocator manages elements alloc/free by allocating
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// "pools" of many elements from a lower level allocator (typically
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// pub_tool_mallocfree.h).
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// Single elements can then be allocated and released from these pools.
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// A pool allocator is faster and has less memory overhead than
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// calling directly pub_tool_mallocfree.h
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// Note: the pools of elements are not freed, even if all the
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// single elements have been freed. The only way to free the underlying
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// pools of elements is to delete the pool allocator.
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//--------------------------------------------------------------------
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typedef struct _PoolAlloc PoolAlloc;
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/* Create new PoolAlloc, using given allocation and free function, and
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for elements of the specified size. Alloc fn must not fail (that
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is, if it returns it must have succeeded.) */
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PoolAlloc* VG_(newPA) ( UWord elemSzB,
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UWord nPerPool,
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void* (*alloc)(HChar*, SizeT),
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HChar* cc,
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void (*free_fn)(void*) );
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/* Free all memory associated with a PoolAlloc. */
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extern void VG_(deletePA) ( PoolAlloc* pa);
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/* Allocates an element from pa. */
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extern void* VG_(allocEltPA) ( PoolAlloc* pa);
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/* Free element of pa. */
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extern void VG_(freeEltPA) ( PoolAlloc* pa, void* p);
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/* A pool allocator can be shared between multiple data structures.
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For example, multiple OSet* can allocate/free nodes from the same
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pool allocator.
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The Pool Allocator provides support to use a ref counter
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to detect a pool allocator is not needed anymore.
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It is the caller responsibility to delete the PA if the ref counter
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drops to 0. In other words, this just helps the caller to manage
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the PA memory destruction but it does not fully manage it.
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Note that the usage of pool reference counting is optional. */
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// VG_(addRefPA) indicates there is a new reference to pa.
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extern void VG_(addRefPA) ( PoolAlloc* pa);
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// VG_(releasePA) indicates a reference to pa has been released.
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extern void VG_(releasePA) ( PoolAlloc* pa);
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// Returns the current nr of reference to pa.
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// When this drops to 0, VG_(deletePA) can be called by the pa user.
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extern UWord VG_(nrRefPA) (PoolAlloc* pa);
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#endif // __PUB_TOOL_POOLALLOC_
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/*--------------------------------------------------------------------*/
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/*--- end pub_tool_poolalloc.h ---*/
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/*--------------------------------------------------------------------*/
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