nik/lush
1
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

support for multiple stacks sharing the same global environment

Browse Source
This commit is contained in:
Roberto Ierusalimschy
2001-01-22 16:01:38 -02:00
parent 4ac58853dc
commit 6fda6a5302
6 changed files with 134 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files

111
lstate.c
View File

@@ -1,5 +1,5 @@
/*
** $Id: lstate.c,v 1.50 2000/12/28 12:55:41 roberto Exp roberto $
** $Id: lstate.c,v 1.51 2001/01/19 13:20:30 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@@ -38,52 +38,70 @@ static int errormessage (lua_State *L) {
}
struct Sopen {
int stacksize;
lua_State *L;
};
/*
** open parts that may cause memory-allocation errors
*/
static void f_luaopen (lua_State *L, void *ud) {
int stacksize = *(int *)ud;
if (stacksize == 0)
stacksize = DEFAULT_STACK_SIZE;
struct Sopen *so = (struct Sopen *)ud;
if (so->stacksize == 0)
so->stacksize = DEFAULT_STACK_SIZE;
else
stacksize += LUA_MINSTACK;
L->G = luaM_new(L, global_State);
G(L)->strt.size = G(L)->udt.size = 0;
G(L)->strt.nuse = G(L)->udt.nuse = 0;
G(L)->strt.hash = G(L)->udt.hash = NULL;
G(L)->Mbuffer = NULL;
G(L)->Mbuffsize = 0;
G(L)->rootproto = NULL;
G(L)->rootcl = NULL;
G(L)->roottable = NULL;
G(L)->TMtable = NULL;
G(L)->sizeTM = 0;
G(L)->ntag = 0;
G(L)->refArray = NULL;
G(L)->nref = 0;
G(L)->sizeref = 0;
G(L)->refFree = NONEXT;
G(L)->nblocks = sizeof(lua_State) + sizeof(global_State);
G(L)->GCthreshold = MAX_INT; /* to avoid GC during pre-definitions */
L->gt = luaH_new(L, 10); /* table of globals */
luaD_init(L, stacksize);
luaS_init(L);
luaX_init(L);
luaT_init(L);
lua_newtable(L);
lua_ref(L, 1); /* create registry */
lua_register(L, LUA_ERRORMESSAGE, errormessage);
so->stacksize += LUA_MINSTACK;
if (so->L != NULL) { /* shared global state? */
L->G = G(so->L);
L->gt = so->L->gt; /* share table of globals */
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 */
}
else { /* create a new global state */
L->G = luaM_new(L, global_State);
G(L)->strt.size = G(L)->udt.size = 0;
G(L)->strt.nuse = G(L)->udt.nuse = 0;
G(L)->strt.hash = G(L)->udt.hash = NULL;
G(L)->Mbuffer = NULL;
G(L)->Mbuffsize = 0;
G(L)->rootproto = NULL;
G(L)->rootcl = NULL;
G(L)->roottable = NULL;
G(L)->TMtable = NULL;
G(L)->sizeTM = 0;
G(L)->ntag = 0;
G(L)->refArray = NULL;
G(L)->nref = 0;
G(L)->sizeref = 0;
G(L)->refFree = NONEXT;
G(L)->nblocks = sizeof(lua_State) + sizeof(global_State);
G(L)->GCthreshold = MAX_INT; /* to avoid GC during pre-definitions */
luaD_init(L, so->stacksize); /* init stack */
L->gt = luaH_new(L, 10); /* table of globals */
luaS_init(L);
luaX_init(L);
luaT_init(L);
lua_newtable(L);
lua_ref(L, 1); /* create registry */
lua_register(L, LUA_ERRORMESSAGE, errormessage);
#ifdef LUA_DEBUG
luaB_opentests(L);
if (lua_state == NULL) lua_state = L; /* keep first state to be opened */
lua_assert(lua_gettop(L) == 0);
luaB_opentests(L);
if (lua_state == NULL) lua_state = L; /* keep first state to be opened */
lua_assert(lua_gettop(L) == 0);
#endif
G(L)->GCthreshold = 2*G(L)->nblocks;
}
}
LUA_API lua_State *lua_open (int stacksize) {
lua_State *L;
L = luaM_new(NULL, lua_State);
LUA_API lua_State *lua_open (lua_State *OL, int stacksize) {
struct Sopen so;
lua_State *L = luaM_new(OL, lua_State);
if (L == NULL) return NULL; /* memory allocation error */
L->G = NULL;
L->stack = NULL;
@@ -92,19 +110,28 @@ LUA_API lua_State *lua_open (int stacksize) {
L->callhook = NULL;
L->linehook = NULL;
L->allowhooks = 1;
if (luaD_runprotected(L, f_luaopen, &stacksize) != 0) {
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 */
lua_close(L);
return NULL;
}
G(L)->GCthreshold = 2*G(L)->nblocks;
return L;
}
LUA_API void lua_close (lua_State *L) {
lua_State *L1 = L->next; /* any surviving thread (if there is one) */
lua_assert(L != lua_state || lua_gettop(L) == 0);
if (G(L)) { /* close global state */
if (L1 == L) L1 = NULL; /* no surviving threads */
if (L1 != NULL) { /* are there other threads? */
lua_assert(L->previous != L);
L->previous->next = L->next;
L->next->previous = L->previous;
}
else if (G(L)) { /* last thread; close global state */
luaC_collect(L, 1); /* collect all elements */
lua_assert(G(L)->rootproto == NULL);
lua_assert(G(L)->rootcl == NULL);
@@ -115,8 +142,8 @@ LUA_API void lua_close (lua_State *L) {
luaM_freearray(L, G(L)->Mbuffer, G(L)->Mbuffsize, char);
luaM_freelem(NULL, L->G, global_State);
}
luaM_freearray(NULL, L->stack, L->stacksize, TObject);
luaM_freelem(NULL, L, lua_State);
luaM_freearray(L1, L->stack, L->stacksize, TObject);
luaM_freelem(L1, L, lua_State);
lua_assert(L != lua_state || memdebug_numblocks == 0);
lua_assert(L != lua_state || memdebug_total == 0);
}