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distinct functions to create/destroy states and threads

This commit is contained in:
Roberto Ierusalimschy 2002-01-11 18:26:52 -02:00
parent b7ae43d457
commit d56d4cf776
7 changed files with 144 additions and 97 deletions
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3
ldo.h
View File

@ -1,5 +1,5 @@
/* /*
** $Id: ldo.h,v 1.1 2001/11/29 22:14:34 rieru Exp rieru $ ** $Id: ldo.h,v 1.38 2002/01/11 20:24:39 roberto Exp $
** Stack and Call structure of Lua ** Stack and Call structure of Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -22,7 +22,6 @@
#define luaD_checkstack(L,n) if (L->stack_last-(n)<=L->top) luaD_stackerror(L) #define luaD_checkstack(L,n) if (L->stack_last-(n)<=L->top) luaD_stackerror(L)
void luaD_init (lua_State *L, int stacksize);
void luaD_lineHook (lua_State *L, int line, lua_Hook linehook); void luaD_lineHook (lua_State *L, int line, lua_Hook linehook);
void luaD_callHook (lua_State *L, lua_Hook callhook, const char *event); void luaD_callHook (lua_State *L, lua_Hook callhook, const char *event);
StkId luaD_precall (lua_State *L, StkId func); StkId luaD_precall (lua_State *L, StkId func);

6
lgc.c
View File

@ -126,6 +126,12 @@ static void markstacks (GCState *st) {
lua_State *L1 = st->L; lua_State *L1 = st->L;
do { /* for each thread */ do { /* for each thread */
StkId o, lim; StkId o, lim;
if (L1->base_ci == NULL) { /* incomplete state? */
lua_assert(L1 != st->L);
L1 = L1->next;
luaE_closethread(st->L, L1->previous); /* collect it */
continue;
}
for (o=L1->stack; o<L1->top; o++) for (o=L1->stack; o<L1->top; o++)
markobject(st, o); markobject(st, o);
lim = (L1->stack_last - L1->ci->base > MAXSTACK) ? L1->ci->base+MAXSTACK lim = (L1->stack_last - L1->ci->base > MAXSTACK) ? L1->ci->base+MAXSTACK

137
lstate.c
View File

@ -26,7 +26,26 @@ struct Sopen {
}; };
static void close_state (lua_State *L, lua_State *OL); static void close_state (lua_State *L);
static void stack_init (lua_State *L, lua_State *OL, int stacksize) {
if (stacksize == 0)
stacksize = DEFAULT_STACK_SIZE;
else
stacksize += LUA_MINSTACK;
stacksize += EXTRA_STACK;
L->stack = luaM_newvector(OL, stacksize, TObject);
L->stacksize = stacksize;
L->top = L->stack + RESERVED_STACK_PREFIX;
L->stack_last = L->stack+(L->stacksize-EXTRA_STACK)-1;
L->base_ci = luaM_newvector(OL, 10, CallInfo);
L->ci = L->base_ci;
L->ci->base = L->top;
L->ci->savedpc = NULL;
L->size_ci = 10;
L->end_ci = L->base_ci + L->size_ci;
}
/* /*
@ -34,22 +53,7 @@ static void close_state (lua_State *L, lua_State *OL);
*/ */
static void f_luaopen (lua_State *L, void *ud) { static void f_luaopen (lua_State *L, void *ud) {
struct Sopen *so = cast(struct Sopen *, ud); struct Sopen *so = cast(struct Sopen *, ud);
if (so->stacksize == 0) /* create a new global state */
so->stacksize = DEFAULT_STACK_SIZE;
else
so->stacksize += LUA_MINSTACK;
if (so->L != NULL) { /* shared global state? */
L->_G = G(so->L);
so->L->next->previous = L; /* insert L into linked list */
L->next = so->L->next;
so->L->next = L;
L->previous = so->L;
luaD_init(L, so->stacksize); /* init stack */
setobj(defaultet(L), defaultet(so->L)); /* share default event table */
setobj(gt(L), gt(so->L)); /* share table of globals */
setobj(registry(L), registry(so->L)); /* share registry */
}
else { /* create a new global state */
L->_G = luaM_new(L, global_State); L->_G = luaM_new(L, global_State);
G(L)->strt.size = 0; G(L)->strt.size = 0;
G(L)->strt.nuse = 0; G(L)->strt.nuse = 0;
@ -63,7 +67,7 @@ static void f_luaopen (lua_State *L, void *ud) {
G(L)->rootudata = NULL; G(L)->rootudata = NULL;
G(L)->tmudata = NULL; G(L)->tmudata = NULL;
G(L)->nblocks = sizeof(lua_State) + sizeof(global_State); G(L)->nblocks = sizeof(lua_State) + sizeof(global_State);
luaD_init(L, so->stacksize); /* init stack */ stack_init(L, L, so->stacksize); /* init stack */
/* create default event table with a dummy table, and then close the loop */ /* create default event table with a dummy table, and then close the loop */
sethvalue(defaultet(L), NULL); sethvalue(defaultet(L), NULL);
sethvalue(defaultet(L), luaH_new(L, 0, 4)); sethvalue(defaultet(L), luaH_new(L, 0, 4));
@ -75,16 +79,9 @@ static void f_luaopen (lua_State *L, void *ud) {
luaX_init(L); luaX_init(L);
G(L)->GCthreshold = 4*G(L)->nblocks; G(L)->GCthreshold = 4*G(L)->nblocks;
} }
}
LUA_API lua_State *lua_newthread (lua_State *OL, int stacksize) { static void preinit_state (lua_State *L) {
struct Sopen so;
lua_State *L;
if (OL) lua_lock(OL);
L = luaM_new(OL, lua_State);
if (L) { /* allocation OK? */
L->_G = NULL;
L->stack = NULL; L->stack = NULL;
L->stacksize = 0; L->stacksize = 0;
L->errorJmp = NULL; L->errorJmp = NULL;
@ -94,33 +91,64 @@ LUA_API lua_State *lua_newthread (lua_State *OL, int stacksize) {
L->size_ci = 0; L->size_ci = 0;
L->base_ci = NULL; L->base_ci = NULL;
L->allowhooks = 1; L->allowhooks = 1;
L->next = L->previous = L;
so.stacksize = stacksize;
so.L = OL;
if (luaD_runprotected(L, f_luaopen, &so) != 0) {
/* memory allocation error: free partial state */
close_state(L, OL);
L = NULL;
} }
}
if (OL) lua_unlock(OL);
LUA_API lua_State *lua_newthread (lua_State *OL, int stacksize) {
lua_State *L;
lua_lock(OL);
L = luaM_new(OL, lua_State);
preinit_state(L);
L->_G = OL->_G;
OL->next->previous = L; /* insert L into linked list */
L->next = OL->next;
OL->next = L;
L->previous = OL;
stack_init(L, OL, stacksize); /* init stack */
setobj(defaultet(L), defaultet(OL)); /* share default event table */
setobj(gt(L), gt(OL)); /* share table of globals */
setobj(registry(L), registry(OL)); /* share registry */
lua_unlock(OL);
lua_userstateopen(L); lua_userstateopen(L);
return L; return L;
} }
static void close_state (lua_State *L, lua_State *OL) { LUA_API lua_State *lua_open (int stacksize) {
struct Sopen so;
lua_State *L;
L = luaM_new(NULL, lua_State);
if (L) { /* allocation OK? */
preinit_state(L);
L->_G = NULL;
L->next = L->previous = L;
so.stacksize = stacksize;
so.L = NULL;
if (luaD_runprotected(L, f_luaopen, &so) != 0) {
/* memory allocation error: free partial state */
close_state(L);
L = NULL;
}
}
lua_userstateopen(L);
return L;
}
void luaE_closethread (lua_State *OL, lua_State *L) {
luaF_close(L, L->stack); /* close all upvalues for this thread */ luaF_close(L, L->stack); /* close all upvalues for this thread */
lua_assert(L->openupval == NULL); lua_assert(L->openupval == NULL);
if (OL != NULL) { /* are there other threads? */
lua_assert(L->previous != L);
L->previous->next = L->next; L->previous->next = L->next;
L->next->previous = L->previous; L->next->previous = L->previous;
luaM_freearray(OL, L->base_ci, L->size_ci, CallInfo);
luaM_freearray(OL, L->stack, L->stacksize, TObject);
luaM_freelem(OL, L);
} }
else if (G(L)) { /* last thread; close global state */
if (G(L)->rootudata) /* (avoid problems with incomplete states) */
luaC_callallgcTM(L); /* call GC tag methods for all udata */ static void close_state (lua_State *L) {
lua_assert(G(L)->tmudata == NULL); luaF_close(L, L->stack); /* close all upvalues for this thread */
if (G(L)) { /* close global state */
luaC_collect(L, 1); /* collect all elements */ luaC_collect(L, 1); /* collect all elements */
lua_assert(G(L)->rootproto == NULL); lua_assert(G(L)->rootproto == NULL);
lua_assert(G(L)->rootudata == NULL); lua_assert(G(L)->rootudata == NULL);
@ -131,21 +159,24 @@ static void close_state (lua_State *L, lua_State *OL) {
luaM_freearray(L, G(L)->Mbuffer, G(L)->Mbuffsize, char); luaM_freearray(L, G(L)->Mbuffer, G(L)->Mbuffsize, char);
luaM_freelem(NULL, L->_G); luaM_freelem(NULL, L->_G);
} }
luaM_freearray(OL, L->base_ci, L->size_ci, CallInfo); luaE_closethread(NULL, L);
luaM_freearray(OL, L->stack, L->stacksize, TObject); }
luaM_freelem(OL, L);
LUA_API void lua_closethread (lua_State *L, lua_State *thread) {
if (L == thread) lua_error(L, "cannot close only thread of a state");
lua_lock(L);
luaE_closethread(L, thread);
lua_unlock(L);
} }
LUA_API void lua_close (lua_State *L) { LUA_API void lua_close (lua_State *L) {
lua_State *OL;
lua_assert(L != lua_state || lua_gettop(L) == 0);
lua_lock(L); lua_lock(L);
OL = L->next; /* any surviving thread (if there is one) */ luaC_callallgcTM(L); /* call GC tag methods for all udata */
if (OL == L) OL = NULL; /* no surviving threads */ lua_assert(G(L)->tmudata == NULL);
close_state(L, OL); while (L->next != L) /* then, close all other threads */
if (OL) lua_unlock(OL); /* cannot unlock over a freed state */ luaE_closethread(L, L->next);
lua_assert(L != lua_state || memdebug_numblocks == 0); close_state(L);
lua_assert(L != lua_state || memdebug_total == 0);
} }

6
lstate.h
View File

@ -64,6 +64,9 @@ struct lua_longjmp; /* defined in ldo.c */
#define RESERVED_STACK_PREFIX 3 #define RESERVED_STACK_PREFIX 3
/* space to handle stack overflow errors */
#define EXTRA_STACK (2*LUA_MINSTACK)
typedef struct stringtable { typedef struct stringtable {
@ -90,6 +93,7 @@ typedef struct CallInfo {
#define ci_func(ci) (clvalue((ci)->base - 1)) #define ci_func(ci) (clvalue((ci)->base - 1))
#define yield_results refi /* reuse this field */
/* /*
@ -138,5 +142,7 @@ struct lua_State {
#define G(L) (L->_G) #define G(L) (L->_G)
void luaE_closethread (lua_State *OL, lua_State *L);
#endif #endif

14
ltests.c
View File

@ -36,7 +36,7 @@
#ifdef LUA_DEBUG #ifdef LUA_DEBUG
lua_State *lua_state = NULL; static lua_State *lua_state = NULL;
int islocked = 0; int islocked = 0;
@ -374,10 +374,9 @@ static int udataval (lua_State *L) {
static int doonnewstack (lua_State *L) { static int doonnewstack (lua_State *L) {
lua_State *L1 = lua_newthread(L, luaL_check_int(L, 1)); lua_State *L1 = lua_newthread(L, luaL_check_int(L, 1));
if (L1 == NULL) return 0;
lua_dostring(L1, luaL_check_string(L, 2)); lua_dostring(L1, luaL_check_string(L, 2));
lua_pushnumber(L, 1); lua_pushnumber(L, 1);
lua_close(L1); lua_closethread(L, L1);
return 1; return 1;
} }
@ -652,6 +651,14 @@ static const struct luaL_reg tests_funcs[] = {
}; };
static void fim (void) {
if (!islocked)
lua_close(lua_state);
lua_assert(memdebug_numblocks == 0);
lua_assert(memdebug_total == 0);
}
void luaB_opentests (lua_State *L) { void luaB_opentests (lua_State *L) {
*cast(int **, L) = &islocked; /* init lock */ *cast(int **, L) = &islocked; /* init lock */
lua_state = L; /* keep first state to be opened */ lua_state = L; /* keep first state to be opened */
@ -663,6 +670,7 @@ void luaB_opentests (lua_State *L) {
luaL_openl(L, tests_funcs); /* open functions inside new table */ luaL_openl(L, tests_funcs); /* open functions inside new table */
lua_setglobals(L); /* restore old table of globals */ lua_setglobals(L); /* restore old table of globals */
lua_setglobal(L, "T"); /* set new table as global T */ lua_setglobal(L, "T"); /* set new table as global T */
atexit(fim);
} }
#endif #endif

3
ltests.h
View File

@ -48,9 +48,6 @@ extern int islocked;
#define lua_unlock(L) lua_assert(--(**cast(int **, L)) == 0) #define lua_unlock(L) lua_assert(--(**cast(int **, L)) == 0)
extern lua_State *lua_state;
void luaB_opentests (lua_State *L); void luaB_opentests (lua_State *L);
#define LUA_USERINIT(L) (luaB_opentests(L), openstdlibs(L)) #define LUA_USERINIT(L) (luaB_opentests(L), openstdlibs(L))

6
lua.h
View File

@ -94,8 +94,10 @@ typedef LUA_NUMBER lua_Number;
/* /*
** state manipulation ** state manipulation
*/ */
LUA_API lua_State *lua_newthread (lua_State *L, int stacksize); LUA_API lua_State *lua_open (int stacksize);
LUA_API void lua_close (lua_State *L); LUA_API void lua_close (lua_State *L);
LUA_API lua_State *lua_newthread (lua_State *L, int stacksize);
LUA_API void lua_closethread (lua_State *L, lua_State *thread);
/* /*
@ -215,8 +217,6 @@ LUA_API void lua_newuserdatabox (lua_State *L, void *u);
** =============================================================== ** ===============================================================
*/ */
#define lua_open(n) lua_newthread(NULL, (n))
#define lua_pop(L,n) lua_settop(L, -(n)-1) #define lua_pop(L,n) lua_settop(L, -(n)-1)
#define lua_register(L,n,f) (lua_pushcfunction(L, f), lua_setglobal(L, n)) #define lua_register(L,n,f) (lua_pushcfunction(L, f), lua_setglobal(L, n))