1*dfc11533SChris Williamson /* 2*dfc11533SChris Williamson ** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $ 3*dfc11533SChris Williamson ** Interface to Memory Manager 4*dfc11533SChris Williamson ** See Copyright Notice in lua.h 5*dfc11533SChris Williamson */ 6*dfc11533SChris Williamson 7*dfc11533SChris Williamson #ifndef lmem_h 8*dfc11533SChris Williamson #define lmem_h 9*dfc11533SChris Williamson 10*dfc11533SChris Williamson 11*dfc11533SChris Williamson #include <sys/zfs_context.h> 12*dfc11533SChris Williamson 13*dfc11533SChris Williamson #include "llimits.h" 14*dfc11533SChris Williamson #include "lua.h" 15*dfc11533SChris Williamson 16*dfc11533SChris Williamson 17*dfc11533SChris Williamson /* 18*dfc11533SChris Williamson ** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is 19*dfc11533SChris Williamson ** always constant. 20*dfc11533SChris Williamson ** The macro is somewhat complex to avoid warnings: 21*dfc11533SChris Williamson ** +1 avoids warnings of "comparison has constant result"; 22*dfc11533SChris Williamson ** cast to 'void' avoids warnings of "value unused". 23*dfc11533SChris Williamson */ 24*dfc11533SChris Williamson #define luaM_reallocv(L,b,on,n,e) \ 25*dfc11533SChris Williamson (cast(void, \ 26*dfc11533SChris Williamson (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \ 27*dfc11533SChris Williamson luaM_realloc_(L, (b), (on)*(e), (n)*(e))) 28*dfc11533SChris Williamson 29*dfc11533SChris Williamson #define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0) 30*dfc11533SChris Williamson #define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0) 31*dfc11533SChris Williamson #define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0])) 32*dfc11533SChris Williamson 33*dfc11533SChris Williamson #define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s)) 34*dfc11533SChris Williamson #define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t))) 35*dfc11533SChris Williamson #define luaM_newvector(L,n,t) \ 36*dfc11533SChris Williamson cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t))) 37*dfc11533SChris Williamson 38*dfc11533SChris Williamson #define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s)) 39*dfc11533SChris Williamson 40*dfc11533SChris Williamson #define luaM_growvector(L,v,nelems,size,t,limit,e) \ 41*dfc11533SChris Williamson if ((nelems)+1 > (size)) \ 42*dfc11533SChris Williamson ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e))) 43*dfc11533SChris Williamson 44*dfc11533SChris Williamson #define luaM_reallocvector(L, v,oldn,n,t) \ 45*dfc11533SChris Williamson ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t)))) 46*dfc11533SChris Williamson 47*dfc11533SChris Williamson LUAI_FUNC l_noret luaM_toobig (lua_State *L); 48*dfc11533SChris Williamson 49*dfc11533SChris Williamson /* not to be called directly */ 50*dfc11533SChris Williamson LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize, 51*dfc11533SChris Williamson size_t size); 52*dfc11533SChris Williamson LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size, 53*dfc11533SChris Williamson size_t size_elem, int limit, 54*dfc11533SChris Williamson const char *what); 55*dfc11533SChris Williamson 56*dfc11533SChris Williamson #endif 57*dfc11533SChris Williamson 58