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Add custom memory allocator to MinGW and MacOS builds

Browse Source 
The standard allocator on Windows is pretty bad prior
to Windows Vista, and nedmalloc is better than the
modified dlmalloc provided with newer versions of the
MinGW libc.

NedMalloc stats in Git
----------------------
  All results are the best result out of 3 runs. The
  benchmarks have been done on different hardware, so
  the repack times are not comparable.

  These benchmarks are all based on 'git repack -adf'
  on the Linux kernel.

  XP
  -----------------------------------------------
  MinGW               Threads  Total Time   Speed
  -----------------------------------------------
  3.4.2                  (1T)  00:12:28.422
  3.4.2     + nedmalloc  (1T)  00:07:25.437 1.68x

  3.4.5                  (1T)  00:12:20.718
  3.4.5     + nedmalloc  (1T)  00:07:24.809 1.67x

  4.3.3-tdm              (1T)  00:12:01.843
  4.3.3-tdm + nedmalloc  (1T)  00:07:16.468 1.65x

  4.3.3-tdm              (2T)  00:07:35.062
  4.3.3-tdm + nedmalloc  (2T)  00:04:57.874 1.54x

  Vista
  -----------------------------------------------
  MinGW               Threads  Total Time   Speed
  -----------------------------------------------
  4.3.3-tdm              (1T)  00:07:40.844
  4.3.3-tdm + nedmalloc  (1T)  00:07:17.548 1.05x

  4.3.3-tdm              (2T)  00:05:33.746
  4.3.3-tdm + nedmalloc  (2T)  00:05:27.334 1.02x

  Mac Mini
  -----------------------------------------------
  GCC                 Threads  Total Time   Speed
  -----------------------------------------------
  i686-darwin9-4.0.1     (2T)  00:09:57.346
  i686-darwin9-4.0.1+ned (2T)  00:08:51.072 1.12x

Signed-off-by: Marius Storm-Olsen <marius@trolltech.com>
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Marius Storm-Olsen 2009-05-31 18:15:23 +02:00 committed by Junio C Hamano
parent e16c60d9f9
commit f0ed8226c9
6 changed files with 7064 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Makefile
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@ -178,6 +178,9 @@ all::
#
# Define NO_CROSS_DIRECTORY_HARDLINKS if you plan to distribute the installed
# programs as a tar, where bin/ and libexec/ might be on different file systems.
#
# Define USE_NED_ALLOCATOR if you want to replace the platforms default
# memory allocators with the nedmalloc allocator written by Niall Douglas.
GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
@$(SHELL_PATH) ./GIT-VERSION-GEN
@ -844,6 +847,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
NO_ST_BLOCKS_IN_STRUCT_STAT = YesPlease
NO_NSEC = YesPlease
USE_WIN32_MMAP = YesPlease
USE_NED_ALLOCATOR = YesPlease
UNRELIABLE_FSTAT = UnfortunatelyYes
OBJECT_CREATION_USES_RENAMES = UnfortunatelyNeedsTo
COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -DNOGDI -Icompat -Icompat/regex -Icompat/fnmatch
@ -1130,6 +1134,11 @@ ifdef UNRELIABLE_FSTAT
BASIC_CFLAGS += -DUNRELIABLE_FSTAT
endif
ifdef USE_NED_ALLOCATOR
COMPAT_CFLAGS += -DUSE_NED_ALLOCATOR -DOVERRIDE_STRDUP -DNDEBUG -DREPLACE_SYSTEM_ALLOCATOR -Icompat/nedmalloc
COMPAT_OBJS += compat/nedmalloc/nedmalloc.o
endif
ifeq ($(TCLTK_PATH),)
NO_TCLTK=NoThanks
endif

23
compat/nedmalloc/License.txt Normal file
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@ -0,0 +1,23 @@
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

136
compat/nedmalloc/Readme.txt Normal file
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@ -0,0 +1,136 @@
nedalloc v1.05 15th June 2008:
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
by Niall Douglas (http://www.nedprod.com/programs/portable/nedmalloc/)
Enclosed is nedalloc, an alternative malloc implementation for multiple
threads without lock contention based on dlmalloc v2.8.4. It is more
or less a newer implementation of ptmalloc2, the standard allocator in
Linux (which is based on dlmalloc v2.7.0) but also contains a per-thread
cache for maximum CPU scalability.
It is licensed under the Boost Software License which basically means
you can do anything you like with it. This does not apply to the malloc.c.h
file which remains copyright to others.
It has been tested on win32 (x86), win64 (x64), Linux (x64), FreeBSD (x64)
and Apple MacOS X (x86). It works very well on all of these and is very
significantly faster than the system allocator on all of these platforms.
By literally dropping in this allocator as a replacement for your system
allocator, you can see real world improvements of up to three times in normal
code!
To use:
-=-=-=-
Drop in nedmalloc.h, nedmalloc.c and malloc.c.h into your project.
Configure using the instructions in nedmalloc.h. Run and enjoy.
To test, compile test.c. It will run a comparison between your system
allocator and nedalloc and tell you how much faster nedalloc is. It also
serves as an example of usage.
Notes:
-=-=-=
If you want the very latest version of this allocator, get it from the
TnFOX SVN repository at svn://svn.berlios.de/viewcvs/tnfox/trunk/src/nedmalloc
Because of how nedalloc allocates an mspace per thread, it can cause
severe bloating of memory usage under certain allocation patterns.
You can substantially reduce this wastage by setting MAXTHREADSINPOOL
or the threads parameter to nedcreatepool() to a fraction of the number of
threads which would normally be in a pool at once. This will reduce
bloating at the cost of an increase in lock contention. If allocated size
is less than THREADCACHEMAX, locking is avoided 90-99% of the time and
if most of your allocations are below this value, you can safely set
MAXTHREADSINPOOL to one.
You will suffer memory leakage unless you call neddisablethreadcache()
per pool for every thread which exits. This is because nedalloc cannot
portably know when a thread exits and thus when its thread cache can
be returned for use by other code. Don't forget pool zero, the system pool.
For C++ type allocation patterns (where the same sizes of memory are
regularly allocated and deallocated as objects are created and destroyed),
the threadcache always benefits performance. If however your allocation
patterns are different, searching the threadcache may significantly slow
down your code - as a rule of thumb, if cache utilisation is below 80%
(see the source for neddisablethreadcache() for how to enable debug
printing in release mode) then you should disable the thread cache for
that thread. You can compile out the threadcache code by setting
THREADCACHEMAX to zero.
Speed comparisons:
-=-=-=-=-=-=-=-=-=
See Benchmarks.xls for details.
The enclosed test.c can do two things: it can be a torture test or a speed
test. The speed test is designed to be a representative synthetic
memory allocator test. It works by randomly mixing allocations with frees
with half of the allocation sizes being a two power multiple less than
512 bytes (to mimic C++ stack instantiated objects) and the other half
being a simple random value less than 16Kb.
The real world code results are from Tn's TestIO benchmark. This is a
heavily multithreaded and memory intensive benchmark with a lot of branching
and other stuff modern processors don't like so much. As you'll note, the
test doesn't show the benefits of the threadcache mostly due to the saturation
of the memory bus being the limiting factor.
ChangeLog:
-=-=-=-=-=
v1.05 15th June 2008:
* { 1042 } Added error check for TLSSET() and TLSFREE() macros. Thanks to
Markus Elfring for reporting this.
* { 1043 } Fixed a segfault when freeing memory allocated using
nedindependent_comalloc(). Thanks to Pavel Vozenilek for reporting this.
v1.04 14th July 2007:
* Fixed a bug with the new optimised implementation that failed to lock
on a realloc under certain conditions.
* Fixed lack of thread synchronisation in InitPool() causing pool corruption
* Fixed a memory leak of thread cache contents on disabling. Thanks to Earl
Chew for reporting this.
* Added a sanity check for freed blocks being valid.
* Reworked test.c into being a torture test.
* Fixed GCC assembler optimisation misspecification
v1.04alpha_svn915 7th October 2006:
* Fixed failure to unlock thread cache list if allocating a new list failed.
Thanks to Dmitry Chichkov for reporting this. Futher thanks to Aleksey Sanin.
* Fixed realloc(0, <size>) segfaulting. Thanks to Dmitry Chichkov for
reporting this.
* Made config defines #ifndef so they can be overriden by the build system.
Thanks to Aleksey Sanin for suggesting this.
* Fixed deadlock in nedprealloc() due to unnecessary locking of preferred
thread mspace when mspace_realloc() always uses the original block's mspace
anyway. Thanks to Aleksey Sanin for reporting this.
* Made some speed improvements by hacking mspace_malloc() to no longer lock
its mspace, thus allowing the recursive mutex implementation to be removed
with an associated speed increase. Thanks to Aleksey Sanin for suggesting this.
* Fixed a bug where allocating mspaces overran its max limit. Thanks to
Aleksey Sanin for reporting this.
v1.03 10th July 2006:
* Fixed memory corruption bug in threadcache code which only appeared with >4
threads and in heavy use of the threadcache.
v1.02 15th May 2006:
* Integrated dlmalloc v2.8.4, fixing the win32 memory release problem and
improving performance still further. Speed is now up to twice the speed of v1.01
(average is 67% faster).
* Fixed win32 critical section implementation. Thanks to Pavel Kuznetsov
for reporting this.
* Wasn't locking mspace if all mspaces were locked. Thanks to Pavel Kuznetsov
for reporting this.
* Added Apple Mac OS X support.
v1.01 24th February 2006:
* Fixed multiprocessor scaling problems by removing sources of cache sloshing
* Earl Chew <earl_chew <at> agilent <dot> com> sent patches for the following:
1. size2binidx() wasn't working for default code path (non x86)
2. Fixed failure to release mspace lock under certain circumstances which
caused a deadlock
v1.00 1st January 2006:
* First release

5750
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/* Alternative malloc implementation for multiple threads without
lock contention based on dlmalloc. (C) 2005-2006 Niall Douglas
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#ifdef _MSC_VER
/* Enable full aliasing on MSVC */
/*#pragma optimize("a", on)*/
#endif
/*#define FULLSANITYCHECKS*/
#include "nedmalloc.h"
#if defined(WIN32) && !defined(__MINGW32__)
#include <malloc.h>
#endif
#define MSPACES 1
#define ONLY_MSPACES 1
#ifndef USE_LOCKS
#define USE_LOCKS 1
#endif
#define FOOTERS 1 /* Need to enable footers so frees lock the right mspace */
#undef DEBUG /* dlmalloc wants DEBUG either 0 or 1 */
#ifdef _DEBUG
#define DEBUG 1
#else
#define DEBUG 0
#endif
#ifdef NDEBUG /* Disable assert checking on release builds */
#undef DEBUG
#endif
/* The default of 64Kb means we spend too much time kernel-side */
#ifndef DEFAULT_GRANULARITY
#define DEFAULT_GRANULARITY (1*1024*1024)
#endif
/*#define USE_SPIN_LOCKS 0*/
/*#define FORCEINLINE*/
#include "malloc.c.h"
#ifdef NDEBUG /* Disable assert checking on release builds */
#undef DEBUG
#endif
/* The maximum concurrent threads in a pool possible */
#ifndef MAXTHREADSINPOOL
#define MAXTHREADSINPOOL 16
#endif
/* The maximum number of threadcaches which can be allocated */
#ifndef THREADCACHEMAXCACHES
#define THREADCACHEMAXCACHES 256
#endif
/* The maximum size to be allocated from the thread cache */
#ifndef THREADCACHEMAX
#define THREADCACHEMAX 8192
#endif
#if 0
/* The number of cache entries for finer grained bins. This is (topbitpos(THREADCACHEMAX)-4)*2 */
#define THREADCACHEMAXBINS ((13-4)*2)
#else
/* The number of cache entries. This is (topbitpos(THREADCACHEMAX)-4) */
#define THREADCACHEMAXBINS (13-4)
#endif
/* Point at which the free space in a thread cache is garbage collected */
#ifndef THREADCACHEMAXFREESPACE
#define THREADCACHEMAXFREESPACE (512*1024)
#endif
#ifdef WIN32
#define TLSVAR DWORD
#define TLSALLOC(k) (*(k)=TlsAlloc(), TLS_OUT_OF_INDEXES==*(k))
#define TLSFREE(k) (!TlsFree(k))
#define TLSGET(k) TlsGetValue(k)
#define TLSSET(k, a) (!TlsSetValue(k, a))
#ifdef DEBUG
static LPVOID ChkedTlsGetValue(DWORD idx)
{
LPVOID ret=TlsGetValue(idx);
assert(S_OK==GetLastError());
return ret;
}
#undef TLSGET
#define TLSGET(k) ChkedTlsGetValue(k)
#endif
#else
#define TLSVAR pthread_key_t
#define TLSALLOC(k) pthread_key_create(k, 0)
#define TLSFREE(k) pthread_key_delete(k)
#define TLSGET(k) pthread_getspecific(k)
#define TLSSET(k, a) pthread_setspecific(k, a)
#endif
#if 0
/* Only enable if testing with valgrind. Causes misoperation */
#define mspace_malloc(p, s) malloc(s)
#define mspace_realloc(p, m, s) realloc(m, s)
#define mspace_calloc(p, n, s) calloc(n, s)
#define mspace_free(p, m) free(m)
#endif
#if defined(__cplusplus)
#if !defined(NO_NED_NAMESPACE)
namespace nedalloc {
#else
extern "C" {
#endif
#endif
size_t nedblksize(void *mem) THROWSPEC
{
#if 0
/* Only enable if testing with valgrind. Causes misoperation */
return THREADCACHEMAX;
#else
if(mem)
{
mchunkptr p=mem2chunk(mem);
assert(cinuse(p)); /* If this fails, someone tried to free a block twice */
if(cinuse(p))
return chunksize(p)-overhead_for(p);
}
return 0;
#endif
}
void nedsetvalue(void *v) THROWSPEC { nedpsetvalue(0, v); }
void * nedmalloc(size_t size) THROWSPEC { return nedpmalloc(0, size); }
void * nedcalloc(size_t no, size_t size) THROWSPEC { return nedpcalloc(0, no, size); }
void * nedrealloc(void *mem, size_t size) THROWSPEC { return nedprealloc(0, mem, size); }
void nedfree(void *mem) THROWSPEC { nedpfree(0, mem); }
void * nedmemalign(size_t alignment, size_t bytes) THROWSPEC { return nedpmemalign(0, alignment, bytes); }
#if !NO_MALLINFO
struct mallinfo nedmallinfo(void) THROWSPEC { return nedpmallinfo(0); }
#endif
int nedmallopt(int parno, int value) THROWSPEC { return nedpmallopt(0, parno, value); }
int nedmalloc_trim(size_t pad) THROWSPEC { return nedpmalloc_trim(0, pad); }
void nedmalloc_stats() THROWSPEC { nedpmalloc_stats(0); }
size_t nedmalloc_footprint() THROWSPEC { return nedpmalloc_footprint(0); }
void **nedindependent_calloc(size_t elemsno, size_t elemsize, void **chunks) THROWSPEC { return nedpindependent_calloc(0, elemsno, elemsize, chunks); }
void **nedindependent_comalloc(size_t elems, size_t *sizes, void **chunks) THROWSPEC { return nedpindependent_comalloc(0, elems, sizes, chunks); }
struct threadcacheblk_t;
typedef struct threadcacheblk_t threadcacheblk;
struct threadcacheblk_t
{ /* Keep less than 16 bytes on 32 bit systems and 32 bytes on 64 bit systems */
#ifdef FULLSANITYCHECKS
unsigned int magic;
#endif
unsigned int lastUsed, size;
threadcacheblk *next, *prev;
};
typedef struct threadcache_t
{
#ifdef FULLSANITYCHECKS
unsigned int magic1;
#endif
int mymspace; /* Last mspace entry this thread used */
long threadid;
unsigned int mallocs, frees, successes;
size_t freeInCache; /* How much free space is stored in this cache */
threadcacheblk *bins[(THREADCACHEMAXBINS+1)*2];
#ifdef FULLSANITYCHECKS
unsigned int magic2;
#endif
} threadcache;
struct nedpool_t
{
MLOCK_T mutex;
void *uservalue;
int threads; /* Max entries in m to use */
threadcache *caches[THREADCACHEMAXCACHES];
TLSVAR mycache; /* Thread cache for this thread. 0 for unset, negative for use mspace-1 directly, otherwise is cache-1 */
mstate m[MAXTHREADSINPOOL+1]; /* mspace entries for this pool */
};
static nedpool syspool;
static FORCEINLINE unsigned int size2binidx(size_t _size) THROWSPEC
{ /* 8=1000 16=10000 20=10100 24=11000 32=100000 48=110000 4096=1000000000000 */
unsigned int topbit, size=(unsigned int)(_size>>4);
/* 16=1 20=1 24=1 32=10 48=11 64=100 96=110 128=1000 4096=100000000 */
#if defined(__GNUC__)
topbit = sizeof(size)*__CHAR_BIT__ - 1 - __builtin_clz(size);
#elif defined(_MSC_VER) && _MSC_VER>=1300
{
unsigned long bsrTopBit;
_BitScanReverse(&bsrTopBit, size);
topbit = bsrTopBit;
}
#else
#if 0
union {
unsigned asInt[2];
double asDouble;
};
int n;
asDouble = (double)size + 0.5;
topbit = (asInt[!FOX_BIGENDIAN] >> 20) - 1023;
#else
{
unsigned int x=size;
x = x | (x >> 1);
x = x | (x >> 2);
x = x | (x >> 4);
x = x | (x >> 8);
x = x | (x >>16);
x = ~x;
x = x - ((x >> 1) & 0x55555555);
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
x = (x + (x >> 4)) & 0x0F0F0F0F;
x = x + (x << 8);
x = x + (x << 16);
topbit=31 - (x >> 24);
}
#endif
#endif
return topbit;
}
#ifdef FULLSANITYCHECKS
static void tcsanitycheck(threadcacheblk **ptr) THROWSPEC
{
assert((ptr[0] && ptr[1]) || (!ptr[0] && !ptr[1]));
if(ptr[0] && ptr[1])
{
assert(nedblksize(ptr[0])>=sizeof(threadcacheblk));
assert(nedblksize(ptr[1])>=sizeof(threadcacheblk));
assert(*(unsigned int *) "NEDN"==ptr[0]->magic);
assert(*(unsigned int *) "NEDN"==ptr[1]->magic);
assert(!ptr[0]->prev);
assert(!ptr[1]->next);
if(ptr[0]==ptr[1])
{
assert(!ptr[0]->next);
assert(!ptr[1]->prev);
}
}
}
static void tcfullsanitycheck(threadcache *tc) THROWSPEC
{
threadcacheblk **tcbptr=tc->bins;
int n;
for(n=0; n<=THREADCACHEMAXBINS; n++, tcbptr+=2)
{
threadcacheblk *b, *ob=0;
tcsanitycheck(tcbptr);
for(b=tcbptr[0]; b; ob=b, b=b->next)
{
assert(*(unsigned int *) "NEDN"==b->magic);
assert(!ob || ob->next==b);
assert(!ob || b->prev==ob);
}
}
}
#endif
static NOINLINE void RemoveCacheEntries(nedpool *p, threadcache *tc, unsigned int age) THROWSPEC
{
#ifdef FULLSANITYCHECKS
tcfullsanitycheck(tc);
#endif
if(tc->freeInCache)
{
threadcacheblk **tcbptr=tc->bins;
int n;
for(n=0; n<=THREADCACHEMAXBINS; n++, tcbptr+=2)
{
threadcacheblk **tcb=tcbptr+1; /* come from oldest end of list */
/*tcsanitycheck(tcbptr);*/
for(; *tcb && tc->frees-(*tcb)->lastUsed>=age; )
{
threadcacheblk *f=*tcb;
size_t blksize=f->size; /*nedblksize(f);*/
assert(blksize<=nedblksize(f));
assert(blksize);
#ifdef FULLSANITYCHECKS
assert(*(unsigned int *) "NEDN"==(*tcb)->magic);
#endif
*tcb=(*tcb)->prev;
if(*tcb)
(*tcb)->next=0;
else
*tcbptr=0;
tc->freeInCache-=blksize;
assert((long) tc->freeInCache>=0);
mspace_free(0, f);
/*tcsanitycheck(tcbptr);*/
}
}
}
#ifdef FULLSANITYCHECKS
tcfullsanitycheck(tc);
#endif
}
static void DestroyCaches(nedpool *p) THROWSPEC
{
if(p->caches)
{
threadcache *tc;
int n;
for(n=0; n<THREADCACHEMAXCACHES; n++)
{
if((tc=p->caches[n]))
{
tc->frees++;
RemoveCacheEntries(p, tc, 0);
assert(!tc->freeInCache);
tc->mymspace=-1;
tc->threadid=0;
mspace_free(0, tc);
p->caches[n]=0;
}
}
}
}
static NOINLINE threadcache *AllocCache(nedpool *p) THROWSPEC
{
threadcache *tc=0;
int n, end;
ACQUIRE_LOCK(&p->mutex);
for(n=0; n<THREADCACHEMAXCACHES && p->caches[n]; n++);
if(THREADCACHEMAXCACHES==n)
{ /* List exhausted, so disable for this thread */
RELEASE_LOCK(&p->mutex);
return 0;
}
tc=p->caches[n]=(threadcache *) mspace_calloc(p->m[0], 1, sizeof(threadcache));
if(!tc)
{
RELEASE_LOCK(&p->mutex);
return 0;
}
#ifdef FULLSANITYCHECKS
tc->magic1=*(unsigned int *)"NEDMALC1";
tc->magic2=*(unsigned int *)"NEDMALC2";
#endif
tc->threadid=(long)(size_t)CURRENT_THREAD;
for(end=0; p->m[end]; end++);
tc->mymspace=tc->threadid % end;
RELEASE_LOCK(&p->mutex);
if(TLSSET(p->mycache, (void *)(size_t)(n+1))) abort();
return tc;
}
static void *threadcache_malloc(nedpool *p, threadcache *tc, size_t *size) THROWSPEC
{
void *ret=0;
unsigned int bestsize;
unsigned int idx=size2binidx(*size);
size_t blksize=0;
threadcacheblk *blk, **binsptr;
#ifdef FULLSANITYCHECKS
tcfullsanitycheck(tc);
#endif
/* Calculate best fit bin size */
bestsize=1<<(idx+4);
#if 0
/* Finer grained bin fit */
idx<<=1;
if(*size>bestsize)
{
idx++;
bestsize+=bestsize>>1;
}
if(*size>bestsize)
{
idx++;
bestsize=1<<(4+(idx>>1));
}
#else
if(*size>bestsize)
{
idx++;
bestsize<<=1;
}
#endif
assert(bestsize>=*size);
if(*size<bestsize) *size=bestsize;
assert(*size<=THREADCACHEMAX);
assert(idx<=THREADCACHEMAXBINS);
binsptr=&tc->bins[idx*2];
/* Try to match close, but move up a bin if necessary */
blk=*binsptr;
if(!blk || blk->size<*size)
{ /* Bump it up a bin */
if(idx<THREADCACHEMAXBINS)
{
idx++;
binsptr+=2;
blk=*binsptr;
}
}
if(blk)
{
blksize=blk->size; /*nedblksize(blk);*/
assert(nedblksize(blk)>=blksize);
assert(blksize>=*size);
if(blk->next)
blk->next->prev=0;
*binsptr=blk->next;
if(!*binsptr)
binsptr[1]=0;
#ifdef FULLSANITYCHECKS
blk->magic=0;
#endif
assert(binsptr[0]!=blk && binsptr[1]!=blk);
assert(nedblksize(blk)>=sizeof(threadcacheblk) && nedblksize(blk)<=THREADCACHEMAX+CHUNK_OVERHEAD);
/*printf("malloc: %p, %p, %p, %lu\n", p, tc, blk, (long) size);*/
ret=(void *) blk;
}
++tc->mallocs;
if(ret)
{
assert(blksize>=*size);
++tc->successes;
tc->freeInCache-=blksize;
assert((long) tc->freeInCache>=0);
}
#if defined(DEBUG) && 0
if(!(tc->mallocs & 0xfff))
{
printf("*** threadcache=%u, mallocs=%u (%f), free=%u (%f), freeInCache=%u\n", (unsigned int) tc->threadid, tc->mallocs,
(float) tc->successes/tc->mallocs, tc->frees, (float) tc->successes/tc->frees, (unsigned int) tc->freeInCache);
}
#endif
#ifdef FULLSANITYCHECKS
tcfullsanitycheck(tc);
#endif
return ret;
}
static NOINLINE void ReleaseFreeInCache(nedpool *p, threadcache *tc, int mymspace) THROWSPEC
{
unsigned int age=THREADCACHEMAXFREESPACE/8192;
/*ACQUIRE_LOCK(&p->m[mymspace]->mutex);*/
while(age && tc->freeInCache>=THREADCACHEMAXFREESPACE)
{
RemoveCacheEntries(p, tc, age);
/*printf("*** Removing cache entries older than %u (%u)\n", age, (unsigned int) tc->freeInCache);*/
age>>=1;
}
/*RELEASE_LOCK(&p->m[mymspace]->mutex);*/
}
static void threadcache_free(nedpool *p, threadcache *tc, int mymspace, void *mem, size_t size) THROWSPEC
{
unsigned int bestsize;
unsigned int idx=size2binidx(size);
threadcacheblk **binsptr, *tck=(threadcacheblk *) mem;
assert(size>=sizeof(threadcacheblk) && size<=THREADCACHEMAX+CHUNK_OVERHEAD);
#ifdef DEBUG
{ /* Make sure this is a valid memory block */
mchunkptr p = mem2chunk(mem);
mstate fm = get_mstate_for(p);
if (!ok_magic(fm)) {
USAGE_ERROR_ACTION(fm, p);
return;
}
}
#endif
#ifdef FULLSANITYCHECKS
tcfullsanitycheck(tc);
#endif
/* Calculate best fit bin size */
bestsize=1<<(idx+4);
#if 0
/* Finer grained bin fit */
idx<<=1;
if(size>bestsize)
{
unsigned int biggerbestsize=bestsize+bestsize<<1;
if(size>=biggerbestsize)
{
idx++;
bestsize=biggerbestsize;
}
}
#endif
if(bestsize!=size) /* dlmalloc can round up, so we round down to preserve indexing */
size=bestsize;
binsptr=&tc->bins[idx*2];
assert(idx<=THREADCACHEMAXBINS);
if(tck==*binsptr)
{
fprintf(stderr, "Attempt to free already freed memory block %p - aborting!\n", tck);
abort();
}
#ifdef FULLSANITYCHECKS
tck->magic=*(unsigned int *) "NEDN";
#endif
tck->lastUsed=++tc->frees;
tck->size=(unsigned int) size;
tck->next=*binsptr;
tck->prev=0;
if(tck->next)
tck->next->prev=tck;
else
binsptr[1]=tck;
assert(!*binsptr || (*binsptr)->size==tck->size);
*binsptr=tck;
assert(tck==tc->bins[idx*2]);
assert(tc->bins[idx*2+1]==tck || binsptr[0]->next->prev==tck);
/*printf("free: %p, %p, %p, %lu\n", p, tc, mem, (long) size);*/
tc->freeInCache+=size;
#ifdef FULLSANITYCHECKS
tcfullsanitycheck(tc);
#endif
#if 1
if(tc->freeInCache>=THREADCACHEMAXFREESPACE)
ReleaseFreeInCache(p, tc, mymspace);
#endif
}
static NOINLINE int InitPool(nedpool *p, size_t capacity, int threads) THROWSPEC
{ /* threads is -1 for system pool */
ensure_initialization();
ACQUIRE_MALLOC_GLOBAL_LOCK();
if(p->threads) goto done;
if(INITIAL_LOCK(&p->mutex)) goto err;
if(TLSALLOC(&p->mycache)) goto err;
if(!(p->m[0]=(mstate) create_mspace(capacity, 1))) goto err;
p->m[0]->extp=p;
p->threads=(threads<1 || threads>MAXTHREADSINPOOL) ? MAXTHREADSINPOOL : threads;
done:
RELEASE_MALLOC_GLOBAL_LOCK();
return 1;
err:
if(threads<0)
abort(); /* If you can't allocate for system pool, we're screwed */
DestroyCaches(p);
if(p->m[0])
{
destroy_mspace(p->m[0]);
p->m[0]=0;
}
if(p->mycache)
{
if(TLSFREE(p->mycache)) abort();
p->mycache=0;
}
RELEASE_MALLOC_GLOBAL_LOCK();
return 0;
}
static NOINLINE mstate FindMSpace(nedpool *p, threadcache *tc, int *lastUsed, size_t size) THROWSPEC
{ /* Gets called when thread's last used mspace is in use. The strategy
is to run through the list of all available mspaces looking for an
unlocked one and if we fail, we create a new one so long as we don't
exceed p->threads */
int n, end;
for(n=end=*lastUsed+1; p->m[n]; end=++n)
{
if(TRY_LOCK(&p->m[n]->mutex)) goto found;
}
for(n=0; n<*lastUsed && p->m[n]; n++)
{
if(TRY_LOCK(&p->m[n]->mutex)) goto found;
}
if(end<p->threads)
{
mstate temp;
if(!(temp=(mstate) create_mspace(size, 1)))
goto badexit;
/* Now we're ready to modify the lists, we lock */
ACQUIRE_LOCK(&p->mutex);
while(p->m[end] && end<p->threads)
end++;
if(end>=p->threads)
{ /* Drat, must destroy it now */
RELEASE_LOCK(&p->mutex);
destroy_mspace((mspace) temp);
goto badexit;
}
/* We really want to make sure this goes into memory now but we
have to be careful of breaking aliasing rules, so write it twice */
*((volatile struct malloc_state **) &p->m[end])=p->m[end]=temp;
ACQUIRE_LOCK(&p->m[end]->mutex);
/*printf("Created mspace idx %d\n", end);*/
RELEASE_LOCK(&p->mutex);
n=end;
goto found;
}
/* Let it lock on the last one it used */
badexit:
ACQUIRE_LOCK(&p->m[*lastUsed]->mutex);
return p->m[*lastUsed];
found:
*lastUsed=n;
if(tc)
tc->mymspace=n;
else
{
if(TLSSET(p->mycache, (void *)(size_t)(-(n+1)))) abort();
}
return p->m[n];
}
nedpool *nedcreatepool(size_t capacity, int threads) THROWSPEC
{
nedpool *ret;
if(!(ret=(nedpool *) nedpcalloc(0, 1, sizeof(nedpool)))) return 0;
if(!InitPool(ret, capacity, threads))
{
nedpfree(0, ret);
return 0;
}
return ret;
}
void neddestroypool(nedpool *p) THROWSPEC
{
int n;
ACQUIRE_LOCK(&p->mutex);
DestroyCaches(p);
for(n=0; p->m[n]; n++)
{
destroy_mspace(p->m[n]);
p->m[n]=0;
}
RELEASE_LOCK(&p->mutex);
if(TLSFREE(p->mycache)) abort();
nedpfree(0, p);
}
void nedpsetvalue(nedpool *p, void *v) THROWSPEC
{
if(!p) { p=&syspool; if(!syspool.threads) InitPool(&syspool, 0, -1); }
p->uservalue=v;
}
void *nedgetvalue(nedpool **p, void *mem) THROWSPEC
{
nedpool *np=0;
mchunkptr mcp=mem2chunk(mem);
mstate fm;
if(!(is_aligned(chunk2mem(mcp))) && mcp->head != FENCEPOST_HEAD) return 0;
if(!cinuse(mcp)) return 0;
if(!next_pinuse(mcp)) return 0;
if(!is_mmapped(mcp) && !pinuse(mcp))
{
if(next_chunk(prev_chunk(mcp))!=mcp) return 0;
}
fm=get_mstate_for(mcp);
if(!ok_magic(fm)) return 0;
if(!ok_address(fm, mcp)) return 0;
if(!fm->extp) return 0;
np=(nedpool *) fm->extp;
if(p) *p=np;
return np->uservalue;
}
void neddisablethreadcache(nedpool *p) THROWSPEC
{
int mycache;
if(!p)
{
p=&syspool;
if(!syspool.threads) InitPool(&syspool, 0, -1);
}
mycache=(int)(size_t) TLSGET(p->mycache);
if(!mycache)
{ /* Set to mspace 0 */
if(TLSSET(p->mycache, (void *)-1)) abort();
}
else if(mycache>0)
{ /* Set to last used mspace */
threadcache *tc=p->caches[mycache-1];
#if defined(DEBUG)
printf("Threadcache utilisation: %lf%% in cache with %lf%% lost to other threads\n",
100.0*tc->successes/tc->mallocs, 100.0*((double) tc->mallocs-tc->frees)/tc->mallocs);
#endif
if(TLSSET(p->mycache, (void *)(size_t)(-tc->mymspace))) abort();
tc->frees++;
RemoveCacheEntries(p, tc, 0);
assert(!tc->freeInCache);
tc->mymspace=-1;
tc->threadid=0;
mspace_free(0, p->caches[mycache-1]);
p->caches[mycache-1]=0;
}
}
#define GETMSPACE(m,p,tc,ms,s,action) \
do \
{ \
mstate m = GetMSpace((p),(tc),(ms),(s)); \
action; \
RELEASE_LOCK(&m->mutex); \
} while (0)
static FORCEINLINE mstate GetMSpace(nedpool *p, threadcache *tc, int mymspace, size_t size) THROWSPEC
{ /* Returns a locked and ready for use mspace */
mstate m=p->m[mymspace];
assert(m);
if(!TRY_LOCK(&p->m[mymspace]->mutex)) m=FindMSpace(p, tc, &mymspace, size);\
/*assert(IS_LOCKED(&p->m[mymspace]->mutex));*/
return m;
}
static FORCEINLINE void GetThreadCache(nedpool **p, threadcache **tc, int *mymspace, size_t *size) THROWSPEC
{
int mycache;
if(size && *size<sizeof(threadcacheblk)) *size=sizeof(threadcacheblk);
if(!*p)
{
*p=&syspool;
if(!syspool.threads) InitPool(&syspool, 0, -1);
}
mycache=(int)(size_t) TLSGET((*p)->mycache);
if(mycache>0)
{
*tc=(*p)->caches[mycache-1];
*mymspace=(*tc)->mymspace;
}
else if(!mycache)
{
*tc=AllocCache(*p);
if(!*tc)
{ /* Disable */
if(TLSSET((*p)->mycache, (void *)-1)) abort();
*mymspace=0;
}
else
*mymspace=(*tc)->mymspace;
}
else
{
*tc=0;
*mymspace=-mycache-1;
}
assert(*mymspace>=0);
assert((long)(size_t)CURRENT_THREAD==(*tc)->threadid);
#ifdef FULLSANITYCHECKS
if(*tc)
{
if(*(unsigned int *)"NEDMALC1"!=(*tc)->magic1 || *(unsigned int *)"NEDMALC2"!=(*tc)->magic2)
{
abort();
}
}
#endif
}
void * nedpmalloc(nedpool *p, size_t size) THROWSPEC
{
void *ret=0;
threadcache *tc;
int mymspace;
GetThreadCache(&p, &tc, &mymspace, &size);
#if THREADCACHEMAX
if(tc && size<=THREADCACHEMAX)
{ /* Use the thread cache */
ret=threadcache_malloc(p, tc, &size);
}
#endif
if(!ret)
{ /* Use this thread's mspace */
GETMSPACE(m, p, tc, mymspace, size,
ret=mspace_malloc(m, size));
}
return ret;
}
void * nedpcalloc(nedpool *p, size_t no, size_t size) THROWSPEC
{
size_t rsize=size*no;
void *ret=0;
threadcache *tc;
int mymspace;
GetThreadCache(&p, &tc, &mymspace, &rsize);
#if THREADCACHEMAX
if(tc && rsize<=THREADCACHEMAX)
{ /* Use the thread cache */
if((ret=threadcache_malloc(p, tc, &rsize)))
memset(ret, 0, rsize);
}
#endif
if(!ret)
{ /* Use this thread's mspace */
GETMSPACE(m, p, tc, mymspace, rsize,
ret=mspace_calloc(m, 1, rsize));
}
return ret;
}
void * nedprealloc(nedpool *p, void *mem, size_t size) THROWSPEC
{
void *ret=0;
threadcache *tc;
int mymspace;
if(!mem) return nedpmalloc(p, size);
GetThreadCache(&p, &tc, &mymspace, &size);
#if THREADCACHEMAX
if(tc && size && size<=THREADCACHEMAX)
{ /* Use the thread cache */
size_t memsize=nedblksize(mem);
assert(memsize);
if((ret=threadcache_malloc(p, tc, &size)))
{
memcpy(ret, mem, memsize<size ? memsize : size);
if(memsize<=THREADCACHEMAX)
threadcache_free(p, tc, mymspace, mem, memsize);
else
mspace_free(0, mem);
}
}
#endif
if(!ret)
{ /* Reallocs always happen in the mspace they happened in, so skip
locking the preferred mspace for this thread */
ret=mspace_realloc(0, mem, size);
}
return ret;
}
void nedpfree(nedpool *p, void *mem) THROWSPEC
{ /* Frees always happen in the mspace they happened in, so skip
locking the preferred mspace for this thread */
threadcache *tc;
int mymspace;
size_t memsize;
assert(mem);
GetThreadCache(&p, &tc, &mymspace, 0);
#if THREADCACHEMAX
memsize=nedblksize(mem);
assert(memsize);
if(mem && tc && memsize<=(THREADCACHEMAX+CHUNK_OVERHEAD))
threadcache_free(p, tc, mymspace, mem, memsize);
else
#endif
mspace_free(0, mem);
}
void * nedpmemalign(nedpool *p, size_t alignment, size_t bytes) THROWSPEC
{
void *ret;
threadcache *tc;
int mymspace;
GetThreadCache(&p, &tc, &mymspace, &bytes);
{ /* Use this thread's mspace */
GETMSPACE(m, p, tc, mymspace, bytes,
ret=mspace_memalign(m, alignment, bytes));
}
return ret;
}
#if !NO_MALLINFO
struct mallinfo nedpmallinfo(nedpool *p) THROWSPEC
{
int n;
struct mallinfo ret={0};
if(!p) { p=&syspool; if(!syspool.threads) InitPool(&syspool, 0, -1); }
for(n=0; p->m[n]; n++)
{
struct mallinfo t=mspace_mallinfo(p->m[n]);
ret.arena+=t.arena;
ret.ordblks+=t.ordblks;
ret.hblkhd+=t.hblkhd;
ret.usmblks+=t.usmblks;
ret.uordblks+=t.uordblks;
ret.fordblks+=t.fordblks;
ret.keepcost+=t.keepcost;
}
return ret;
}
#endif
int nedpmallopt(nedpool *p, int parno, int value) THROWSPEC
{
return mspace_mallopt(parno, value);
}
int nedpmalloc_trim(nedpool *p, size_t pad) THROWSPEC
{
int n, ret=0;
if(!p) { p=&syspool; if(!syspool.threads) InitPool(&syspool, 0, -1); }
for(n=0; p->m[n]; n++)
{
ret+=mspace_trim(p->m[n], pad);
}
return ret;
}
void nedpmalloc_stats(nedpool *p) THROWSPEC
{
int n;
if(!p) { p=&syspool; if(!syspool.threads) InitPool(&syspool, 0, -1); }
for(n=0; p->m[n]; n++)
{
mspace_malloc_stats(p->m[n]);
}
}
size_t nedpmalloc_footprint(nedpool *p) THROWSPEC
{
size_t ret=0;
int n;
if(!p) { p=&syspool; if(!syspool.threads) InitPool(&syspool, 0, -1); }
for(n=0; p->m[n]; n++)
{
ret+=mspace_footprint(p->m[n]);
}
return ret;
}
void **nedpindependent_calloc(nedpool *p, size_t elemsno, size_t elemsize, void **chunks) THROWSPEC
{
void **ret;
threadcache *tc;
int mymspace;
GetThreadCache(&p, &tc, &mymspace, &elemsize);
GETMSPACE(m, p, tc, mymspace, elemsno*elemsize,
ret=mspace_independent_calloc(m, elemsno, elemsize, chunks));
return ret;
}
void **nedpindependent_comalloc(nedpool *p, size_t elems, size_t *sizes, void **chunks) THROWSPEC
{
void **ret;
threadcache *tc;
int mymspace;
size_t i, *adjustedsizes=(size_t *) alloca(elems*sizeof(size_t));
if(!adjustedsizes) return 0;
for(i=0; i<elems; i++)
adjustedsizes[i]=sizes[i]<sizeof(threadcacheblk) ? sizeof(threadcacheblk) : sizes[i];
GetThreadCache(&p, &tc, &mymspace, 0);
GETMSPACE(m, p, tc, mymspace, 0,
ret=mspace_independent_comalloc(m, elems, adjustedsizes, chunks));
return ret;
}
#ifdef OVERRIDE_STRDUP
/*
* This implementation is purely there to override the libc version, to
* avoid a crash due to allocation and free on different 'heaps'.
*/
char *strdup(const char *s1)
{
char *s2 = 0;
if (s1) {
s2 = malloc(strlen(s1) + 1);
strcpy(s2, s1);
}
return s2;
}
#endif
#if defined(__cplusplus)
}
#endif

180
compat/nedmalloc/nedmalloc.h Normal file
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@ -0,0 +1,180 @@
/* nedalloc, an alternative malloc implementation for multiple threads without
lock contention based on dlmalloc v2.8.3. (C) 2005 Niall Douglas
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#ifndef NEDMALLOC_H
#define NEDMALLOC_H
/* See malloc.c.h for what each function does.
REPLACE_SYSTEM_ALLOCATOR causes nedalloc's functions to be called malloc,
free etc. instead of nedmalloc, nedfree etc. You may or may not want this.
NO_NED_NAMESPACE prevents the functions from being defined in the nedalloc
namespace when in C++ (uses the global namespace instead).
EXTSPEC can be defined to be __declspec(dllexport) or
__attribute__ ((visibility("default"))) or whatever you like. It defaults
to extern.
USE_LOCKS can be 2 if you want to define your own MLOCK_T, INITIAL_LOCK,
ACQUIRE_LOCK, RELEASE_LOCK, TRY_LOCK, IS_LOCKED and NULL_LOCK_INITIALIZER.
*/
#include <stddef.h> /* for size_t */
#ifndef EXTSPEC
#define EXTSPEC extern
#endif
#if defined(_MSC_VER) && _MSC_VER>=1400
#define MALLOCATTR __declspec(restrict)
#endif
#ifdef __GNUC__
#define MALLOCATTR __attribute__ ((malloc))
#endif
#ifndef MALLOCATTR
#define MALLOCATTR
#endif
#ifdef REPLACE_SYSTEM_ALLOCATOR
#define nedmalloc malloc
#define nedcalloc calloc
#define nedrealloc realloc
#define nedfree free
#define nedmemalign memalign
#define nedmallinfo mallinfo
#define nedmallopt mallopt
#define nedmalloc_trim malloc_trim
#define nedmalloc_stats malloc_stats
#define nedmalloc_footprint malloc_footprint
#define nedindependent_calloc independent_calloc
#define nedindependent_comalloc independent_comalloc
#ifdef _MSC_VER
#define nedblksize _msize
#endif
#endif
#ifndef NO_MALLINFO
#define NO_MALLINFO 0
#endif
#if !NO_MALLINFO
struct mallinfo;
#endif
#if defined(__cplusplus)
#if !defined(NO_NED_NAMESPACE)
namespace nedalloc {
#else
extern "C" {
#endif
#define THROWSPEC throw()
#else
#define THROWSPEC
#endif
/* These are the global functions */
/* Gets the usable size of an allocated block. Note this will always be bigger than what was
asked for due to rounding etc.
*/
EXTSPEC size_t nedblksize(void *mem) THROWSPEC;
EXTSPEC void nedsetvalue(void *v) THROWSPEC;
EXTSPEC MALLOCATTR void * nedmalloc(size_t size) THROWSPEC;
EXTSPEC MALLOCATTR void * nedcalloc(size_t no, size_t size) THROWSPEC;
EXTSPEC MALLOCATTR void * nedrealloc(void *mem, size_t size) THROWSPEC;
EXTSPEC void nedfree(void *mem) THROWSPEC;
EXTSPEC MALLOCATTR void * nedmemalign(size_t alignment, size_t bytes) THROWSPEC;
#if !NO_MALLINFO
EXTSPEC struct mallinfo nedmallinfo(void) THROWSPEC;
#endif
EXTSPEC int nedmallopt(int parno, int value) THROWSPEC;
EXTSPEC int nedmalloc_trim(size_t pad) THROWSPEC;
EXTSPEC void nedmalloc_stats(void) THROWSPEC;
EXTSPEC size_t nedmalloc_footprint(void) THROWSPEC;
EXTSPEC MALLOCATTR void **nedindependent_calloc(size_t elemsno, size_t elemsize, void **chunks) THROWSPEC;
EXTSPEC MALLOCATTR void **nedindependent_comalloc(size_t elems, size_t *sizes, void **chunks) THROWSPEC;
/* These are the pool functions */
struct nedpool_t;
typedef struct nedpool_t nedpool;
/* Creates a memory pool for use with the nedp* functions below.
Capacity is how much to allocate immediately (if you know you'll be allocating a lot
of memory very soon) which you can leave at zero. Threads specifies how many threads
will *normally* be accessing the pool concurrently. Setting this to zero means it
extends on demand, but be careful of this as it can rapidly consume system resources
where bursts of concurrent threads use a pool at once.
*/
EXTSPEC MALLOCATTR nedpool *nedcreatepool(size_t capacity, int threads) THROWSPEC;
/* Destroys a memory pool previously created by nedcreatepool().
*/
EXTSPEC void neddestroypool(nedpool *p) THROWSPEC;
/* Sets a value to be associated with a pool. You can retrieve this value by passing
any memory block allocated from that pool.
*/
EXTSPEC void nedpsetvalue(nedpool *p, void *v) THROWSPEC;
/* Gets a previously set value using nedpsetvalue() or zero if memory is unknown.
Optionally can also retrieve pool.
*/
EXTSPEC void *nedgetvalue(nedpool **p, void *mem) THROWSPEC;
/* Disables the thread cache for the calling thread, returning any existing cache
data to the central pool.
*/
EXTSPEC void neddisablethreadcache(nedpool *p) THROWSPEC;
EXTSPEC MALLOCATTR void * nedpmalloc(nedpool *p, size_t size) THROWSPEC;
EXTSPEC MALLOCATTR void * nedpcalloc(nedpool *p, size_t no, size_t size) THROWSPEC;
EXTSPEC MALLOCATTR void * nedprealloc(nedpool *p, void *mem, size_t size) THROWSPEC;
EXTSPEC void nedpfree(nedpool *p, void *mem) THROWSPEC;
EXTSPEC MALLOCATTR void * nedpmemalign(nedpool *p, size_t alignment, size_t bytes) THROWSPEC;
#if !NO_MALLINFO
EXTSPEC struct mallinfo nedpmallinfo(nedpool *p) THROWSPEC;
#endif
EXTSPEC int nedpmallopt(nedpool *p, int parno, int value) THROWSPEC;
EXTSPEC int nedpmalloc_trim(nedpool *p, size_t pad) THROWSPEC;
EXTSPEC void nedpmalloc_stats(nedpool *p) THROWSPEC;
EXTSPEC size_t nedpmalloc_footprint(nedpool *p) THROWSPEC;
EXTSPEC MALLOCATTR void **nedpindependent_calloc(nedpool *p, size_t elemsno, size_t elemsize, void **chunks) THROWSPEC;
EXTSPEC MALLOCATTR void **nedpindependent_comalloc(nedpool *p, size_t elems, size_t *sizes, void **chunks) THROWSPEC;
#if defined(__cplusplus)
}
#endif
#undef MALLOCATTR
#undef EXTSPEC
#endif