Andrew's git - gitweb.git/blob - compat/nedmalloc/nedmalloc.h

   1/* nedalloc, an alternative malloc implementation for multiple threads without
   2lock contention based on dlmalloc v2.8.3. (C) 2005 Niall Douglas
   3
   4Boost Software License - Version 1.0 - August 17th, 2003
   5
   6Permission is hereby granted, free of charge, to any person or organization
   7obtaining a copy of the software and accompanying documentation covered by
   8this license (the "Software") to use, reproduce, display, distribute,
   9execute, and transmit the Software, and to prepare derivative works of the
  10Software, and to permit third-parties to whom the Software is furnished to
  11do so, all subject to the following:
  12
  13The copyright notices in the Software and this entire statement, including
  14the above license grant, this restriction and the following disclaimer,
  15must be included in all copies of the Software, in whole or in part, and
  16all derivative works of the Software, unless such copies or derivative
  17works are solely in the form of machine-executable object code generated by
  18a source language processor.
  19
  20THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  23SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  24FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  25ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  26DEALINGS IN THE SOFTWARE.
  27*/
  28
  29#ifndef NEDMALLOC_H
  30#define NEDMALLOC_H
  31
  32
  33/* See malloc.c.h for what each function does.
  34
  35REPLACE_SYSTEM_ALLOCATOR causes nedalloc's functions to be called malloc,
  36free etc. instead of nedmalloc, nedfree etc. You may or may not want this.
  37
  38NO_NED_NAMESPACE prevents the functions from being defined in the nedalloc
  39namespace when in C++ (uses the global namespace instead).
  40
  41EXTSPEC can be defined to be __declspec(dllexport) or
  42__attribute__ ((visibility("default"))) or whatever you like. It defaults
  43to extern.
  44
  45USE_LOCKS can be 2 if you want to define your own MLOCK_T, INITIAL_LOCK,
  46ACQUIRE_LOCK, RELEASE_LOCK, TRY_LOCK, IS_LOCKED and NULL_LOCK_INITIALIZER.
  47
  48*/
  49
  50#include <stddef.h>   /* for size_t */
  51
  52#ifndef EXTSPEC
  53 #define EXTSPEC extern
  54#endif
  55
  56#if defined(_MSC_VER) && _MSC_VER>=1400
  57 #define MALLOCATTR __declspec(restrict)
  58#endif
  59#ifdef __GNUC__
  60 #define MALLOCATTR __attribute__ ((malloc))
  61#endif
  62#ifndef MALLOCATTR
  63 #define MALLOCATTR
  64#endif
  65
  66#ifdef REPLACE_SYSTEM_ALLOCATOR
  67 #define nedmalloc               malloc
  68 #define nedcalloc               calloc
  69 #define nedrealloc              realloc
  70 #define nedfree                 free
  71 #define nedmemalign             memalign
  72 #define nedmallinfo             mallinfo
  73 #define nedmallopt              mallopt
  74 #define nedmalloc_trim          malloc_trim
  75 #define nedmalloc_stats         malloc_stats
  76 #define nedmalloc_footprint     malloc_footprint
  77 #define nedindependent_calloc   independent_calloc
  78 #define nedindependent_comalloc independent_comalloc
  79 #ifdef _MSC_VER
  80  #define nedblksize              _msize
  81 #endif
  82#endif
  83
  84#ifndef NO_MALLINFO
  85#define NO_MALLINFO 0
  86#endif
  87
  88#if !NO_MALLINFO
  89struct mallinfo;
  90#endif
  91
  92#if defined(__cplusplus)
  93 #if !defined(NO_NED_NAMESPACE)
  94namespace nedalloc {
  95 #else
  96extern "C" {
  97 #endif
  98 #define THROWSPEC throw()
  99#else
 100 #define THROWSPEC
 101#endif
 102
 103/* These are the global functions */
 104
 105/* Gets the usable size of an allocated block. Note this will always be bigger than what was
 106asked for due to rounding etc.
 107*/
 108EXTSPEC size_t nedblksize(void *mem) THROWSPEC;
 109
 110EXTSPEC void nedsetvalue(void *v) THROWSPEC;
 111
 112EXTSPEC MALLOCATTR void * nedmalloc(size_t size) THROWSPEC;
 113EXTSPEC MALLOCATTR void * nedcalloc(size_t no, size_t size) THROWSPEC;
 114EXTSPEC MALLOCATTR void * nedrealloc(void *mem, size_t size) THROWSPEC;
 115EXTSPEC void   nedfree(void *mem) THROWSPEC;
 116EXTSPEC MALLOCATTR void * nedmemalign(size_t alignment, size_t bytes) THROWSPEC;
 117#if !NO_MALLINFO
 118EXTSPEC struct mallinfo nedmallinfo(void) THROWSPEC;
 119#endif
 120EXTSPEC int    nedmallopt(int parno, int value) THROWSPEC;
 121EXTSPEC int    nedmalloc_trim(size_t pad) THROWSPEC;
 122EXTSPEC void   nedmalloc_stats(void) THROWSPEC;
 123EXTSPEC size_t nedmalloc_footprint(void) THROWSPEC;
 124EXTSPEC MALLOCATTR void **nedindependent_calloc(size_t elemsno, size_t elemsize, void **chunks) THROWSPEC;
 125EXTSPEC MALLOCATTR void **nedindependent_comalloc(size_t elems, size_t *sizes, void **chunks) THROWSPEC;
 126
 127/* These are the pool functions */
 128struct nedpool_t;
 129typedef struct nedpool_t nedpool;
 130
 131/* Creates a memory pool for use with the nedp* functions below.
 132Capacity is how much to allocate immediately (if you know you'll be allocating a lot
 133of memory very soon) which you can leave at zero. Threads specifies how many threads
 134will *normally* be accessing the pool concurrently. Setting this to zero means it
 135extends on demand, but be careful of this as it can rapidly consume system resources
 136where bursts of concurrent threads use a pool at once.
 137*/
 138EXTSPEC MALLOCATTR nedpool *nedcreatepool(size_t capacity, int threads) THROWSPEC;
 139
 140/* Destroys a memory pool previously created by nedcreatepool().
 141*/
 142EXTSPEC void neddestroypool(nedpool *p) THROWSPEC;
 143
 144/* Sets a value to be associated with a pool. You can retrieve this value by passing
 145any memory block allocated from that pool.
 146*/
 147EXTSPEC void nedpsetvalue(nedpool *p, void *v) THROWSPEC;
 148/* Gets a previously set value using nedpsetvalue() or zero if memory is unknown.
 149Optionally can also retrieve pool.
 150*/
 151EXTSPEC void *nedgetvalue(nedpool **p, void *mem) THROWSPEC;
 152
 153/* Disables the thread cache for the calling thread, returning any existing cache
 154data to the central pool.
 155*/
 156EXTSPEC void neddisablethreadcache(nedpool *p) THROWSPEC;
 157
 158EXTSPEC MALLOCATTR void * nedpmalloc(nedpool *p, size_t size) THROWSPEC;
 159EXTSPEC MALLOCATTR void * nedpcalloc(nedpool *p, size_t no, size_t size) THROWSPEC;
 160EXTSPEC MALLOCATTR void * nedprealloc(nedpool *p, void *mem, size_t size) THROWSPEC;
 161EXTSPEC void   nedpfree(nedpool *p, void *mem) THROWSPEC;
 162EXTSPEC MALLOCATTR void * nedpmemalign(nedpool *p, size_t alignment, size_t bytes) THROWSPEC;
 163#if !NO_MALLINFO
 164EXTSPEC struct mallinfo nedpmallinfo(nedpool *p) THROWSPEC;
 165#endif
 166EXTSPEC int    nedpmallopt(nedpool *p, int parno, int value) THROWSPEC;
 167EXTSPEC int    nedpmalloc_trim(nedpool *p, size_t pad) THROWSPEC;
 168EXTSPEC void   nedpmalloc_stats(nedpool *p) THROWSPEC;
 169EXTSPEC size_t nedpmalloc_footprint(nedpool *p) THROWSPEC;
 170EXTSPEC MALLOCATTR void **nedpindependent_calloc(nedpool *p, size_t elemsno, size_t elemsize, void **chunks) THROWSPEC;
 171EXTSPEC MALLOCATTR void **nedpindependent_comalloc(nedpool *p, size_t elems, size_t *sizes, void **chunks) THROWSPEC;
 172
 173#if defined(__cplusplus)
 174}
 175#endif
 176
 177#undef MALLOCATTR
 178#undef EXTSPEC
 179
 180#endif