1323530Savg/* 2323530Savg** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $ 3323530Savg** Interface to Memory Manager 4323530Savg** See Copyright Notice in lua.h 5323530Savg*/ 6323530Savg 7323530Savg#ifndef lmem_h 8323530Savg#define lmem_h 9323530Savg 10323530Savg 11323530Savg#include <sys/zfs_context.h> 12323530Savg 13323530Savg#include "llimits.h" 14323530Savg#include "lua.h" 15323530Savg 16323530Savg 17323530Savg/* 18323530Savg** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is 19323530Savg** always constant. 20323530Savg** The macro is somewhat complex to avoid warnings: 21323530Savg** +1 avoids warnings of "comparison has constant result"; 22323530Savg** cast to 'void' avoids warnings of "value unused". 23323530Savg*/ 24323530Savg#define luaM_reallocv(L,b,on,n,e) \ 25323530Savg (cast(void, \ 26323530Savg (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \ 27323530Savg luaM_realloc_(L, (b), (on)*(e), (n)*(e))) 28323530Savg 29323530Savg#define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0) 30323530Savg#define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0) 31323530Savg#define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0])) 32323530Savg 33323530Savg#define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s)) 34323530Savg#define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t))) 35323530Savg#define luaM_newvector(L,n,t) \ 36323530Savg cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t))) 37323530Savg 38323530Savg#define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s)) 39323530Savg 40323530Savg#define luaM_growvector(L,v,nelems,size,t,limit,e) \ 41323530Savg if ((nelems)+1 > (size)) \ 42323530Savg ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e))) 43323530Savg 44323530Savg#define luaM_reallocvector(L, v,oldn,n,t) \ 45323530Savg ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t)))) 46323530Savg 47323530SavgLUAI_FUNC l_noret luaM_toobig (lua_State *L); 48323530Savg 49323530Savg/* not to be called directly */ 50323530SavgLUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize, 51323530Savg size_t size); 52323530SavgLUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size, 53323530Savg size_t size_elem, int limit, 54323530Savg const char *what); 55323530Savg 56323530Savg#endif 57323530Savg 58