1 /* BEGIN CSTYLED */ 2 /* 3 ** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $ 4 ** Interface to Memory Manager 5 ** See Copyright Notice in lua.h 6 */ 7 8 #ifndef lmem_h 9 #define lmem_h 10 11 12 #include "llimits.h" 13 #include <sys/lua/lua.h> 14 15 16 /* 17 ** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is 18 ** always constant. 19 ** The macro is somewhat complex to avoid warnings: 20 ** +1 avoids warnings of "comparison has constant result"; 21 ** cast to 'void' avoids warnings of "value unused". 22 */ 23 #define luaM_reallocv(L,b,on,n,e) \ 24 (cast(void, \ 25 (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \ 26 luaM_realloc_(L, (b), (on)*(e), (n)*(e))) 27 28 #define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0) 29 #define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0) 30 #define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0])) 31 32 #define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s)) 33 #define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t))) 34 #define luaM_newvector(L,n,t) \ 35 cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t))) 36 37 #define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s)) 38 39 #define luaM_growvector(L,v,nelems,size,t,limit,e) \ 40 if ((nelems)+1 > (size)) \ 41 ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e))) 42 43 #define luaM_reallocvector(L, v,oldn,n,t) \ 44 ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t)))) 45 46 LUAI_FUNC l_noret luaM_toobig (lua_State *L); 47 48 /* not to be called directly */ 49 LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize, 50 size_t size); 51 LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size, 52 size_t size_elem, int limit, 53 const char *what); 54 55 #endif 56 /* END CSTYLED */ 57