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# lua/lmem.h

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    00001 /*
    00002 ** $Id: lmem.h,v 1.31 2005/04/25 19:24:10 roberto Exp $
    00003 ** Interface to Memory Manager
    00004 ** See Copyright Notice in lua.h
    00005 */
    00006
    00007 #ifndef lmem_h
    00008 #define lmem_h
    00009
    00010
    00011 #include <stddef.h>
    00012
    00013 #include "llimits.h"
    00014 #include "lua.h"
    00015
    00016 #define MEMERRMSG       "not enough memory"
    00017
    00018
    00019 #define luaM_reallocv(L,b,on,n,e) \
    00020         ((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ?  /* +1 to avoid warnings */ \
    00021                 luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \
    00022                 luaM_toobig(L))
    00023
    00024 #define luaM_freemem(L, b, s)   luaM_realloc_(L, (b), (s), 0)
    00025 #define luaM_free(L, b)         luaM_realloc_(L, (b), sizeof(*(b)), 0)
    00026 #define luaM_freearray(L, b, n, t)   luaM_reallocv(L, (b), n, 0, sizeof(t))
    00027
    00028 #define luaM_malloc(L,t)        luaM_realloc_(L, NULL, 0, (t))
    00029 #define luaM_new(L,t)           cast(t *, luaM_malloc(L, sizeof(t)))
    00030 #define luaM_newvector(L,n,t) \
    00031                 cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
    00032
    00033 #define luaM_growvector(L,v,nelems,size,t,limit,e) \
    00034           if ((nelems)+1 > (size)) \
    00035             ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
    00036
    00037 #define luaM_reallocvector(L, v,oldn,n,t) \
    00038    ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
    00039
    00040
    00041 LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
    00042                                                           size_t size);
    00043 LUAI_FUNC void *luaM_toobig (lua_State *L);
    00044 LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
    00045                                size_t size_elem, int limit,
    00046                                const char *errormsg);
    00047
    00048 #endif
    00049