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no more one environment per thread: all threads share a single global

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environment
This commit is contained in:
Roberto Ierusalimschy 2009-10-23 17:12:19 -02:00
parent f5073de0a7
commit 5bc91c6405
7 changed files with 27 additions and 47 deletions
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14
lapi.c
View file

@ -1,5 +1,5 @@
/*
** $Id: lapi.c,v 2.92 2009/09/28 16:32:50 roberto Exp roberto $
** $Id: lapi.c,v 2.93 2009/10/05 16:44:33 roberto Exp roberto $
** Lua API
** See Copyright Notice in lua.h
*/
@ -55,13 +55,13 @@ static TValue *index2addr (lua_State *L, int idx) {
return L->top + idx;
}
else switch (idx) { /* pseudo-indices */
case LUA_REGISTRYINDEX: return registry(L);
case LUA_REGISTRYINDEX: return &G(L)->l_registry;
case LUA_ENVIRONINDEX: {
Closure *func = curr_func(L);
sethvalue(L, &L->env, func->c.env);
return &L->env;
}
case LUA_GLOBALSINDEX: return gt(L);
case LUA_GLOBALSINDEX: return &G(L)->l_gt;
default: {
Closure *func = curr_func(L);
idx = LUA_GLOBALSINDEX - idx;
@ -76,7 +76,7 @@ static TValue *index2addr (lua_State *L, int idx) {
static Table *getcurrenv (lua_State *L) {
if (L->ci->previous == NULL) /* no enclosing function? */
return hvalue(gt(L)); /* use global table as environment */
return hvalue(&G(L)->l_gt); /* use global table as environment */
else {
Closure *func = curr_func(L);
return func->c.env;
@ -633,9 +633,6 @@ LUA_API void lua_getfenv (lua_State *L, int idx) {
case LUA_TUSERDATA:
sethvalue(L, L->top, uvalue(o)->env);
break;
case LUA_TTHREAD:
setobj2s(L, L->top, gt(thvalue(o)));
break;
default:
setnilvalue(L->top);
break;
@ -755,9 +752,6 @@ LUA_API int lua_setfenv (lua_State *L, int idx) {
case LUA_TUSERDATA:
uvalue(o)->env = hvalue(L->top - 1);
break;
case LUA_TTHREAD:
sethvalue(L, gt(thvalue(o)), hvalue(L->top - 1));
break;
default:
res = 0;
break;

13
lbaselib.c
View file

@ -1,5 +1,5 @@
/*
** $Id: lbaselib.c,v 1.219 2009/10/05 16:44:33 roberto Exp roberto $
** $Id: lbaselib.c,v 1.220 2009/10/23 12:50:25 roberto Exp roberto $
** Basic library
** See Copyright Notice in lua.h
*/
@ -125,7 +125,7 @@ static void getfunc (lua_State *L, int opt) {
static int luaB_getfenv (lua_State *L) {
getfunc(L, 1);
if (lua_iscfunction(L, -1)) /* is a C function? */
lua_pushvalue(L, LUA_GLOBALSINDEX); /* return the thread's global env. */
lua_pushvalue(L, LUA_GLOBALSINDEX); /* return the global env. */
else
lua_getfenv(L, -1);
return 1;
@ -136,14 +136,7 @@ static int luaB_setfenv (lua_State *L) {
luaL_checktype(L, 2, LUA_TTABLE);
getfunc(L, 0);
lua_pushvalue(L, 2);
if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) {
/* change environment of current thread */
lua_pushthread(L);
lua_insert(L, -2);
lua_setfenv(L, -2);
return 0;
}
else if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0)
if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0)
return luaL_error(L,
LUA_QL("setfenv") " cannot change environment of given object");
return 1;

4
ldo.c
View file

@ -1,5 +1,5 @@
/*
** $Id: ldo.c,v 2.68 2009/09/28 16:32:50 roberto Exp roberto $
** $Id: ldo.c,v 2.69 2009/10/11 20:02:19 roberto Exp roberto $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@ -579,7 +579,7 @@ static void f_parser (lua_State *L, void *ud) {
: luaY_parser(L, p->z, &p->buff, &p->varl, p->name);
setptvalue2s(L, L->top, tf);
incr_top(L);
cl = luaF_newLclosure(L, tf->sizeupvalues, hvalue(gt(L)));
cl = luaF_newLclosure(L, tf->sizeupvalues, hvalue(&G(L)->l_gt));
cl->l.p = tf;
setclvalue(L, L->top - 1, cl);
for (i = 0; i < tf->sizeupvalues; i++) /* initialize upvalues */

9
lgc.c
View file

@ -1,5 +1,5 @@
/*
** $Id: lgc.c,v 2.56 2009/09/28 13:50:34 roberto Exp roberto $
** $Id: lgc.c,v 2.57 2009/09/28 16:32:50 roberto Exp roberto $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@ -221,9 +221,9 @@ static void markroot (lua_State *L) {
g->grayagain = NULL;
g->weak = g->ephemeron = g->allweak = NULL;
markobject(g, g->mainthread);
/* make global table be traversed before main stack */
markvalue(g, gt(g->mainthread));
markvalue(g, registry(L));
/* make global table and registry to be traversed before main stack */
markvalue(g, &g->l_gt);
markvalue(g, &g->l_registry);
markmt(g);
markbeingfnz(g); /* mark any finalizing object left from previous cycle */
g->gcstate = GCSpropagate;
@ -383,7 +383,6 @@ static void traversestack (global_State *g, lua_State *L) {
StkId o;
if (L->stack == NULL)
return; /* stack not completely built yet */
markvalue(g, gt(L)); /* mark global table */
for (o = L->stack; o < L->top; o++)
markvalue(g, o);
if (g->gcstate == GCSatomic) { /* final traversal? */

19
lstate.c
View file

@ -1,5 +1,5 @@
/*
** $Id: lstate.c,v 2.61 2009/09/30 20:49:47 roberto Exp roberto $
** $Id: lstate.c,v 2.62 2009/10/05 16:44:33 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@ -108,18 +108,18 @@ static int cpcall (lua_State *L) {
/*
** Create registry table and its predefined values
*/
static void init_registry (lua_State *L) {
static void init_registry (lua_State *L, global_State *g) {
Closure *cp;
TValue mt;
/* create registry */
Table *registry = luaH_new(L);
sethvalue(L, registry(L), registry);
sethvalue(L, &g->l_registry, registry);
luaH_resize(L, registry, LUA_RIDX_LAST, 0);
/* registry[LUA_RIDX_MAINTHREAD] = L */
setthvalue(L, &mt, L);
setobj2t(L, luaH_setint(L, registry, LUA_RIDX_MAINTHREAD), &mt);
/* registry[LUA_RIDX_CPCALL] = cpcall */
cp = luaF_newCclosure(L, 0, hvalue(gt(L)));
cp = luaF_newCclosure(L, 0, hvalue(&g->l_gt));
cp->c.f = cpcall;
setclvalue(L, &mt, cp);
setobj2t(L, luaH_setint(L, registry, LUA_RIDX_CPCALL), &mt);
@ -127,14 +127,14 @@ static void init_registry (lua_State *L) {
/*
** open parts of a state that may cause memory-allocation errors
** 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 */
sethvalue(L, gt(L), luaH_new(L)); /* table of globals */
init_registry(L);
sethvalue(L, &g->l_gt, luaH_new(L)); /* table of globals */
init_registry(L, g);
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
luaT_init(L);
luaX_init(L);
@ -164,7 +164,6 @@ static void preinit_state (lua_State *L, global_State *g) {
L->base_ci.next = L->base_ci.previous = NULL;
L->ci = &L->base_ci;
L->errfunc = 0;
setnilvalue(gt(L));
}
@ -190,7 +189,6 @@ LUA_API lua_State *lua_newthread (lua_State *L) {
api_incr_top(L);
preinit_state(L1, G(L));
stack_init(L1, L); /* init stack */
setobj2n(L, gt(L1), gt(L)); /* share table of globals */
L1->hookmask = L->hookmask;
L1->basehookcount = L->basehookcount;
L1->hook = L->hook;
@ -236,7 +234,8 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
g->strt.size = 0;
g->strt.nuse = 0;
g->strt.hash = NULL;
setnilvalue(registry(L));
setnilvalue(&g->l_registry);
setnilvalue(&g->l_gt);
luaZ_initbuffer(L, &g->buff);
g->panic = NULL;
g->version = lua_version(NULL);

10
lstate.h
View file

@ -1,5 +1,5 @@
/*
** $Id: lstate.h,v 2.45 2009/06/18 18:59:18 roberto Exp roberto $
** $Id: lstate.h,v 2.46 2009/07/15 17:26:14 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@ -44,12 +44,6 @@
struct lua_longjmp; /* defined in ldo.c */
/* table of globals */
#define gt(L) (&L->l_gt)
/* registry */
#define registry(L) (&G(L)->l_registry)
/* extra stack space to handle TM calls and some other extras */
#define EXTRA_STACK 5
@ -146,6 +140,7 @@ typedef struct global_State {
int gcstepmul; /* GC `granularity' */
lua_CFunction panic; /* to be called in unprotected errors */
TValue l_registry;
TValue l_gt; /* table of globals */
struct lua_State *mainthread;
UpVal uvhead; /* head of double-linked list of all open upvalues */
const lua_Number *version; /* pointer to version number */
@ -173,7 +168,6 @@ struct lua_State {
int basehookcount;
int hookcount;
lua_Hook hook;
TValue l_gt; /* table of globals */
TValue env; /* temporary place for environments */
GCObject *openupval; /* list of open upvalues in this stack */
GCObject *gclist;

5
ltests.c
View file

@ -1,5 +1,5 @@
/*
** $Id: ltests.c,v 2.75 2009/10/05 16:44:33 roberto Exp roberto $
** $Id: ltests.c,v 2.76 2009/10/11 20:02:19 roberto Exp roberto $
** Internal Module for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/
@ -305,7 +305,6 @@ static void checkstack (global_State *g, lua_State *L1) {
lua_assert(uv->v != &uv->u.value); /* must be open */
lua_assert(!isblack(uvo)); /* open upvalues cannot be black */
}
checkliveness(g, gt(L1));
for (ci = L1->ci; ci != NULL; ci = ci->previous) {
lua_assert(ci->top <= L1->stack_last);
lua_assert(lua_checkpc(ci));
@ -366,6 +365,8 @@ int lua_checkmemory (lua_State *L) {
global_State *g = G(L);
GCObject *o;
UpVal *uv;
checkliveness(g, &g->l_registry);
checkliveness(g, &g->l_gt);
checkstack(g, g->mainthread);
for (o = g->rootgc; o != obj2gco(g->mainthread); o = gch(o)->next) {
lua_assert(!testbits(o->gch.marked, bit2mask(SEPARATED, SFIXEDBIT)));