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Diffstat (limited to 'src/lua/lmem.c')
-rw-r--r-- | src/lua/lmem.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/src/lua/lmem.c b/src/lua/lmem.c deleted file mode 100644 index 8fdecef3..00000000 --- a/src/lua/lmem.c +++ /dev/null @@ -1,150 +0,0 @@ -/* -** $Id: lmem.c,v 1.3 2001/11/26 23:00:24 darkgod Exp $ -** Interface to Memory Manager -** See Copyright Notice in lua.h -*/ - - -#include <stdlib.h> - -#include "lua.h" - -#include "ldo.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" - - - - -#ifdef LUA_DEBUG -/* -** {====================================================================== -** Controlled version for realloc. -** ======================================================================= -*/ - - -#include <assert.h> -#include <limits.h> -#include <string.h> - -#define realloc(b, s) debug_realloc(b, s) -#define malloc(b) debug_realloc(NULL, b) -#define free(b) debug_realloc(b, 0) - - -/* ensures maximum alignment for HEADER */ -#define HEADER (sizeof(union L_Umaxalign)) - -#define MARKSIZE 16 -#define MARK 0x55 /* 01010101 (a nice pattern) */ - - -#define blocksize(b) ((unsigned long *)((char *)(b) - HEADER)) - -unsigned long memdebug_numblocks = 0; -unsigned long memdebug_total = 0; -unsigned long memdebug_maxmem = 0; -unsigned long memdebug_memlimit = LONG_MAX; - - -static void *checkblock (void *block) { - unsigned long *b = blocksize(block); - unsigned long size = *b; - int i; - for (i=0;i<MARKSIZE;i++) - assert(*(((char *)b)+HEADER+size+i) == MARK+i); /* corrupted block? */ - memdebug_numblocks--; - memdebug_total -= size; - return b; -} - - -static void freeblock (void *block) { - if (block) { - size_t size = *blocksize(block); - block = checkblock(block); - memset(block, -1, size+HEADER+MARKSIZE); /* erase block */ - (free)(block); /* free original block */ - } -} - - -static void *debug_realloc (void *block, size_t size) { - if (size == 0) { - freeblock(block); - return NULL; - } - else if (memdebug_total+size > memdebug_memlimit) - return NULL; /* to test memory allocation errors */ - else { - size_t realsize = HEADER+size+MARKSIZE; - char *newblock = (char *)(malloc)(realsize); /* alloc a new block */ - int i; - if (realsize < size) return NULL; /* overflow! */ - if (newblock == NULL) return NULL; - if (block) { - size_t oldsize = *blocksize(block); - if (oldsize > size) oldsize = size; - memcpy(newblock+HEADER, block, oldsize); - freeblock(block); /* erase (and check) old copy */ - } - memdebug_total += size; - if (memdebug_total > memdebug_maxmem) memdebug_maxmem = memdebug_total; - memdebug_numblocks++; - *(unsigned long *)newblock = size; - for (i=0;i<MARKSIZE;i++) - *(newblock+HEADER+size+i) = (char)(MARK+i); - return newblock+HEADER; - } -} - - -/* }====================================================================== */ -#endif - - - -/* -** Real ISO (ANSI) systems do not need these tests; -** but some systems (Sun OS) are not that ISO... -*/ -#ifdef OLD_ANSI -#define realloc(b,s) ((b) == NULL ? malloc(s) : (realloc)(b, s)) -#define free(b) if (b) (free)(b) -#endif - - -void *luaM_growaux (lua_State *L, void *block, size_t nelems, - int inc, size_t size, const char *errormsg, size_t limit) { - size_t newn = nelems+inc; - if (nelems >= limit-inc) lua_error(L, errormsg); - if ((newn ^ nelems) <= nelems || /* still the same power-of-2 limit? */ - (nelems > 0 && newn < MINPOWER2)) /* or block already is MINPOWER2? */ - return block; /* do not need to reallocate */ - else /* it crossed a power-of-2 boundary; grow to next power */ - return luaM_realloc(L, block, luaO_power2(newn)*size); -} - - -/* -** generic allocation routine. -*/ -void *luaM_realloc (lua_State *L, void *block, lint32 size) { - if (size == 0) { - free(block); /* block may be NULL; that is OK for free */ - return NULL; - } - else if (size >= MAX_SIZET) - lua_error(L, "memory allocation error: block too big"); - block = realloc(block, size); - if (block == NULL) { - if (L) - luaD_breakrun(L, LUA_ERRMEM); /* break run without error message */ - else return NULL; /* error before creating state! */ - } - return block; -} - - |