static void
checkluaversion(lua_State *L) {
const lua_Number *v = lua_version(L);
if (v != lua_version(NULL))
fault("multiple Lua VMs detected");
else if (*v != LUA_VERSION_NUM) {
fault("Lua version mismatch: app. needs %f, Lua core provides %f",
LUA_VERSION_NUM, *v);
}
}
LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
const lua_Number *v = lua_version(L);
if (sz != LUAL_NUMSIZES) /* check numeric types */
luaL_error(L, "core and library have incompatible numeric types");
if (v != lua_version(NULL))
luaL_error(L, "multiple Lua VMs detected");
else if (*v != ver)
luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
ver, *v);
}
LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) {
const lua_Number *v = lua_version(L);
if (v != lua_version(NULL))
luaL_error(L, "multiple Lua VMs detected");
else if (*v != ver)
luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
ver, *v);
/* check conversions number -> integer types */
lua_pushnumber(L, -(lua_Number)0x1234);
if (lua_tointeger(L, -1) != -0x1234 ||
lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234)
luaL_error(L, "bad conversion number->int;"
" must recompile Lua with proper settings");
lua_pop(L, 1);
}
void luaL_checkversion_ (LuaThread *L, double ver) {
THREAD_CHECK(L);
const double *v = lua_version(L);
if (v != lua_version(NULL))
luaL_error(L, "multiple Lua VMs detected");
else if (*v != ver)
luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
ver, *v);
/* check conversions number -> integer types */
lua_pushnumber(L, -(double)0x1234);
if (lua_tointeger(L, -1) != -0x1234 ||
lua_tounsigned(L, -1) != (uint32_t)-0x1234)
luaL_error(L, "bad conversion number->int;"
" must recompile Lua with proper settings");
L->stack_.pop();
}
/*
** open parts of the state that may cause memory-allocation errors
*/
static void f_luaopen (lua_State *L, void *ud) {
global_State *g = G(L);
UNUSED(ud);
stack_init(L, L); /* init stack */
init_registry(L, g);
#if LUA_FASTREF_SUPPORT
{
TValue n;
sethvalue(L, &G(L)->l_refs, luaH_new(L, 1, 0)); /* refs */
setnvalue(&n, 0);
setobj2t(L, luaH_setnum(L, hvalue(&G(L)->l_refs), LUA_RIDX_FASTREF_FREELIST), &n);
setnilvalue(&g->fastrefNilValue);
}
#endif /* LUA_FASTREF_SUPPORT */
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
luaT_init(L);
luaX_init(L);
/* pre-create memory-error message */
g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
luaS_fix(g->memerrmsg); /* it should never be collected */
g->gcrunning = 1; /* allow gc */
g->version = lua_version(NULL);
luai_userstateopen(L);
}
LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
lua_Number v = lua_version(L);
if (sz != LUAL_NUMSIZES) /* check numeric types */
luaL_error(L, "core and library have incompatible numeric types");
else if (v != ver)
luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
(LUAI_UACNUMBER)ver, (LUAI_UACNUMBER)v);
}
/*
** open parts of the state that may cause memory-allocation errors.
** ('g->version' != NULL flags that the state was completely build)
*/
static void f_luaopen (lua_State *L, void *ud) {
global_State *g = G(L);
UNUSED(ud);
stack_init(L, L); /* init stack */
init_registry(L, g);
luaS_init(L);
luaT_init(L);
luaX_init(L);
g->gcrunning = 1; /* allow gc */
g->version = lua_version(NULL);
luai_userstateopen(L);
}
LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
int i;
lua_State *L;
global_State *g;
/* cast -> llimits.h line 93 是一个宏*/
/* f -> lauxlib.c l_alloc */
LG *l = cast(LG *, (*f)(ud, NULL, LUA_TTHREAD, sizeof(LG))); /* -> LG *l = (LG *)((*f)(ud, NULL, LUA_TTHREAD, sizeof(LG)));*/
if (l == NULL) return NULL;
L = &l->l.l;
g = &l->g;
L->next = NULL;
L->tt = LUA_TTHREAD;
g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
L->marked = luaC_white(g);
g->gckind = KGC_NORMAL;
preinit_state(L, g);
g->frealloc = f;
g->ud = ud;
g->mainthread = L;
g->seed = makeseed(L);
g->uvhead.u.l.prev = &g->uvhead;
g->uvhead.u.l.next = &g->uvhead;
g->gcrunning = 0; /* no GC while building state */
g->GCestimate = 0;
g->strt.size = 0;
g->strt.nuse = 0;
g->strt.hash = NULL;
setnilvalue(&g->l_registry);
luaZ_initbuffer(L, &g->buff);
g->panic = NULL;
g->version = lua_version(NULL);
g->gcstate = GCSpause;
g->allgc = NULL;
g->finobj = NULL;
g->tobefnz = NULL;
g->sweepgc = g->sweepfin = NULL;
g->gray = g->grayagain = NULL;
g->weak = g->ephemeron = g->allweak = NULL;
g->totalbytes = sizeof(LG);
g->GCdebt = 0;
g->gcpause = LUAI_GCPAUSE;
g->gcmajorinc = LUAI_GCMAJOR;
g->gcstepmul = LUAI_GCMUL;
for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {
/* memory allocation error: free partial state */
close_state(L);
L = NULL;
}
else
luai_userstateopen(L);
return L;
}
/*
** open parts of the state that may cause memory-allocation errors
*/
static void f_luaopen (lua_State *L, void *ud) {
global_State *g = G(L);
UNUSED(ud);
stack_init(L, L); /* init stack */
init_registry(L, g);
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
luaT_init(L);
luaX_init(L);
/* pre-create memory-error message */
g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
luaS_fix(g->memerrmsg); /* it should never be collected */
g->gcrunning = 1; /* allow gc */
g->version = lua_version(NULL);
luai_userstateopen(L);
}
/*
** open parts of the state that may cause memory-allocation errors.
** ('g->version' != NULL flags that the state was completely build)
*/
static void f_luaopen (lua_State *L, void *ud) {
global_State *g = G(L);
UNUSED(ud);
stack_init(L, L); /* init stack */
init_registry(L, g);
#if LUA_FASTREF_SUPPORT
{
TValue n;
sethvalue(L, &G(L)->l_refs, luaH_new(L)); /* refs */
setivalue(&n, 0);
luaH_setint(L, hvalue(&G(L)->l_refs), LUA_RIDX_FASTREF_FREELIST, &n);
setnilvalue(&g->fastrefNilValue);
}
#endif /* LUA_FASTREF_SUPPORT */
luaS_init(L);
luaT_init(L);
luaX_init(L);
g->gcrunning = 1; /* allow gc */
g->version = lua_version(NULL);
luai_userstateopen(L);
}
