forked from bartvdbraak/blender
4bd4037276
Release builds will now use lock-free allocator by
default without any internal locks happening.
MemHead is also reduces to as minimum as it's possible.
It still need to be size_t stored in a MemHead in order
to make us keep track on memory we're requesting from
the system, not memory which system is allocating. This
is probably also faster than using a malloc's usable
size function.
Lock-free guarded allocator will say you whether all
the blocks were freed, but wouldn't give you a list
of unfreed blocks list. To have such a list use a
--debug or --debug-memory command line arguments.
Debug builds does have the same behavior as release
builds. This is so tools like valgrind are not
screwed up by guarded allocator as they're currently
are.
--
svn merge -r59941:59942 -r60072:60073 -r60093:60094 \
-r60095:60096 ^/branches/soc-2013-depsgraph_mt
221 lines
8.1 KiB
C
221 lines
8.1 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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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
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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 Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): Brecht Van Lommel
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* Campbell Barton
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/**
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* \file MEM_guardedalloc.h
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* \ingroup MEM
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*
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* \author Copyright (C) 2001 NaN Technologies B.V.
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* \brief Read \ref MEMPage
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*
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* \page MEMPage Guarded memory(de)allocation
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*
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* \section aboutmem c-style guarded memory allocation
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*
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* \subsection memabout About the MEM module
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*
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* MEM provides guarded malloc/calloc calls. All memory is enclosed by
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* pads, to detect out-of-bound writes. All blocks are placed in a
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* linked list, so they remain reachable at all times. There is no
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* back-up in case the linked-list related data is lost.
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*
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* \subsection memissues Known issues with MEM
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*
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* There are currently no known issues with MEM. Note that there is a
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* second intern/ module with MEM_ prefix, for use in c++.
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*
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* \subsection memdependencies Dependencies
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* - stdlib
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* - stdio
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*
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* \subsection memdocs API Documentation
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* See \ref MEM_guardedalloc.h
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*/
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#ifndef __MEM_GUARDEDALLOC_H__
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#define __MEM_GUARDEDALLOC_H__
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#include <stdio.h> /* needed for FILE* */
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/* needed for uintptr_t and attributes, exception, dont use BLI anywhere else in MEM_* */
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#include "../../source/blender/blenlib/BLI_sys_types.h"
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#include "../../source/blender/blenlib/BLI_compiler_attrs.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Returns the length of the allocated memory segment pointed at
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* by vmemh. If the pointer was not previously allocated by this
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* module, the result is undefined.*/
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extern size_t (*MEM_allocN_len)(const void *vmemh) ATTR_WARN_UNUSED_RESULT;
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/**
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* Release memory previously allocatred by this module.
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*/
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extern void (*MEM_freeN)(void *vmemh);
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#if 0 /* UNUSED */
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/**
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* Return zero if memory is not in allocated list
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*/
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extern short (*MEM_testN)(void *vmemh);
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#endif
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/**
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* Duplicates a block of memory, and returns a pointer to the
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* newly allocated block. */
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extern void *(*MEM_dupallocN)(const void *vmemh) /* ATTR_MALLOC */ ATTR_WARN_UNUSED_RESULT;
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/**
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* Reallocates a block of memory, and returns pointer to the newly
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* allocated block, the old one is freed. this is not as optimized
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* as a system realloc but just makes a new allocation and copies
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* over from existing memory. */
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extern void *(*MEM_reallocN_id)(void *vmemh, size_t len, const char *str) /* ATTR_MALLOC */ ATTR_WARN_UNUSED_RESULT ATTR_ALLOC_SIZE(2);
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/**
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* A variant of realloc which zeros new bytes
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*/
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extern void *(*MEM_recallocN_id)(void *vmemh, size_t len, const char *str) /* ATTR_MALLOC */ ATTR_WARN_UNUSED_RESULT ATTR_ALLOC_SIZE(2);
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#define MEM_reallocN(vmemh, len) MEM_reallocN_id(vmemh, len, __func__)
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#define MEM_recallocN(vmemh, len) MEM_recallocN_id(vmemh, len, __func__)
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/**
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* Allocate a block of memory of size len, with tag name str. The
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* memory is cleared. The name must be static, because only a
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* pointer to it is stored ! */
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extern void *(*MEM_callocN)(size_t len, const char *str) /* ATTR_MALLOC */ ATTR_WARN_UNUSED_RESULT ATTR_ALLOC_SIZE(1) ATTR_NONNULL(2);
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/**
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* Allocate a block of memory of size len, with tag name str. The
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* name must be a static, because only a pointer to it is stored !
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* */
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extern void *(*MEM_mallocN)(size_t len, const char *str) /* ATTR_MALLOC */ ATTR_WARN_UNUSED_RESULT ATTR_ALLOC_SIZE(1) ATTR_NONNULL(2);
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/**
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* Same as callocN, clears memory and uses mmap (disk cached) if supported.
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* Can be free'd with MEM_freeN as usual.
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* */
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extern void *(*MEM_mapallocN)(size_t len, const char *str) /* ATTR_MALLOC */ ATTR_WARN_UNUSED_RESULT ATTR_ALLOC_SIZE(1) ATTR_NONNULL(2);
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/** Print a list of the names and sizes of all allocated memory
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* blocks. as a python dict for easy investigation */
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extern void (*MEM_printmemlist_pydict)(void);
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/** Print a list of the names and sizes of all allocated memory
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* blocks. */
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extern void (*MEM_printmemlist)(void);
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/** calls the function on all allocated memory blocks. */
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extern void (*MEM_callbackmemlist)(void (*func)(void *));
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/** Print statistics about memory usage */
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extern void (*MEM_printmemlist_stats)(void);
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/** Set the callback function for error output. */
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extern void (*MEM_set_error_callback)(void (*func)(const char *));
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/**
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* Are the start/end block markers still correct ?
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*
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* @retval 0 for correct memory, 1 for corrupted memory. */
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extern bool (*MEM_check_memory_integrity)(void);
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/** Set thread locking functions for safe memory allocation from multiple
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* threads, pass NULL pointers to disable thread locking again. */
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extern void (*MEM_set_lock_callback)(void (*lock)(void), void (*unlock)(void));
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/** Attempt to enforce OSX (or other OS's) to have malloc and stack nonzero */
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extern void (*MEM_set_memory_debug)(void);
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/**
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* Memory usage stats
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* - MEM_get_memory_in_use is all memory
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* - MEM_get_mapped_memory_in_use is a subset of all memory */
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extern uintptr_t (*MEM_get_memory_in_use)(void);
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/** Get mapped memory usage. */
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extern uintptr_t (*MEM_get_mapped_memory_in_use)(void);
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/** Get amount of memory blocks in use. */
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extern unsigned int (*MEM_get_memory_blocks_in_use)(void);
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/** Reset the peak memory statistic to zero. */
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extern void (*MEM_reset_peak_memory)(void);
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/** Get the peak memory usage in bytes, including mmap allocations. */
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extern size_t (*MEM_get_peak_memory)(void) ATTR_WARN_UNUSED_RESULT;
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#define MEM_SAFE_FREE(v) if (v) { MEM_freeN(v); v = NULL; } (void)0
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#ifndef NDEBUG
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extern const char *(*MEM_name_ptr)(void *vmemh);
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#endif
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/* Switch allocator to slower but fully guarded mode. */
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void MEM_use_guarded_allocator(void);
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#ifdef __cplusplus
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/* alloc funcs for C++ only */
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#define MEM_CXX_CLASS_ALLOC_FUNCS(_id) \
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public: \
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void *operator new(size_t num_bytes) { \
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return MEM_mallocN(num_bytes, _id); \
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} \
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void operator delete(void *mem) { \
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if (mem) \
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MEM_freeN(mem); \
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} \
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void *operator new[](size_t num_bytes) { \
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return MEM_mallocN(num_bytes, _id "[]"); \
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} \
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void operator delete[](void *mem) { \
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if (mem) \
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MEM_freeN(mem); \
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} \
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#if defined __GNUC__ || defined __sun
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# define OBJECT_GUARDED_NEW(type, args ...) \
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new(MEM_mallocN(sizeof(type), __func__)) type(args)
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#else
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# define OBJECT_GUARDED_NEW(type, ...) \
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new(MEM_mallocN(sizeof(type), __FUNCTION__)) type(__VA_ARGS__)
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#endif
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#define OBJECT_GUARDED_DELETE(what, type) \
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{ if(what) { \
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((type*)(what))->~type(); \
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MEM_freeN(what); \
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} } (void)0
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#endif /* __cplusplus */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __MEM_GUARDEDALLOC_H__ */
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