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