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Sync VEX/LICENSE.GPL with top-level COPYING file. We used 3 different addresses for writing to the FSF to receive a copy of the GPL. Replace all different variants with an URL <http://www.gnu.org/licenses/>. The following files might still have some slightly different (L)GPL copyright notice because they were derived from other programs: - files under coregrind/m_demangle which come from libiberty: cplus-dem.c, d-demangle.c, demangle.h, rust-demangle.c, safe-ctype.c and safe-ctype.h - coregrind/m_demangle/dyn-string.[hc] derived from GCC. - coregrind/m_demangle/ansidecl.h derived from glibc. - VEX files for FMA detived from glibc: host_generic_maddf.h and host_generic_maddf.c - files under coregrin/m_debuginfo derived from LZO: lzoconf.h, lzodefs.h, minilzo-inl.c and minilzo.h - files under coregrind/m_gdbserver detived from GDB: gdb/signals.h, inferiors.c, regcache.c, regcache.h, regdef.h, remote-utils.c, server.c, server.h, signals.c, target.c, target.h and utils.c Plus the following test files: - none/tests/ppc32/testVMX.c derived from testVMX. - ppc tests derived from QEMU: jm-insns.c, ppc64_helpers.h and test_isa_3_0.c - tests derived from bzip2 (with embedded GPL text in code): hackedbz2.c, origin5-bz2.c, varinfo6.c - tests detived from glibc: str_tester.c, pth_atfork1.c - test detived from GCC libgomp: tc17_sembar.c - performance tests derived from bzip2 or tinycc (with embedded GPL text in code): bz2.c, test_input_for_tinycc.c and tinycc.c
100 lines
4.1 KiB
C
100 lines
4.1 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) 2011-2017 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, see <http://www.gnu.org/licenses/>.
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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_POOLALLOC_H
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#define __PUB_TOOL_POOLALLOC_H
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#include "pub_tool_basics.h" // UWord
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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 return NULL (that
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is, if it returns it must have succeeded.)
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This function never returns NULL. */
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extern PoolAlloc* VG_(newPA) ( UWord elemSzB,
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UWord nPerPool,
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Alloc_Fn_t alloc_fn,
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const HChar* cc,
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Free_Fn_t free_fn );
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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. The function never returns NULL. */
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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 call VG_(addRefPA) for
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each new reference to a pool and VG_(releasePA) when such a reference
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disappears.
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VG_(releasePA) will automatically call VG_(deletePA)
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to delete the PA when the ref counter drops to 0. */
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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) decrements the pa reference count and deletes the pa if that
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// reference count has dropped to zero. Returns the new value of the reference
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// count.
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extern UWord VG_(releasePA) ( PoolAlloc* pa);
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// How many elements are managed by the pool 'pa'. This includes
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// the elements allocated by VG_(allocEltPA), the elements freed by
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// VG_(freeEltPA) and the elements that are in a block and have not
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// yet been allocated.
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extern UWord VG_(sizePA) ( 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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