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- /*
- ** $Id: lmem.h,v 1.40 2013/02/20 14:08:21 roberto Exp $
- ** Interface to Memory Manager
- ** See Copyright Notice in lua.h
- */
- #ifndef lmem_h
- #define lmem_h
- #include <stddef.h>
- #include "llimits.h"
- #include "lua.h"
- /*
- ** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is
- ** always constant.
- ** The macro is somewhat complex to avoid warnings:
- ** +1 avoids warnings of "comparison has constant result";
- ** cast to 'void' avoids warnings of "value unused".
- */
- #define luaM_reallocv(L,b,on,n,e) \
- (cast(void, \
- (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \
- luaM_realloc_(L, (b), (on)*(e), (n)*(e)))
- #define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0)
- #define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0)
- #define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0]))
- #define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s))
- #define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t)))
- #define luaM_newvector(L,n,t) \
- cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
- #define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s))
- #define luaM_growvector(L,v,nelems,size,t,limit,e) \
- if ((nelems)+1 > (size)) \
- ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
- #define luaM_reallocvector(L, v,oldn,n,t) \
- ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
- LUAI_FUNC l_noret luaM_toobig (lua_State *L);
- /* not to be called directly */
- LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
- size_t size);
- LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
- size_t size_elem, int limit,
- const char *what);
- #endif
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