no more maximum stack size

6 files changed, 37 insertions, 47 deletions

diff --git a/lbaselib.c b/lbaselib.c
index b561a52c..363acdd9 100644
--- a/lbaselib.c
+++ b/lbaselib.c
@@ -434,7 +434,7 @@ static int luaB_coroutine (lua_State *L) {
   int n = lua_gettop(L);
   luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
     "Lua function expected");
-  NL = lua_newthread(L, 0);
+  NL = lua_newthread(L);
   if (NL == NULL) lua_error(L, "unable to create new thread");
   /* move function and arguments from L to NL */
   for (i=0; i<n; i++) {
diff --git a/ldo.c b/ldo.c
index ec39419a..2c2a28cd 100644
--- a/ldo.c
+++ b/ldo.c
@@ -71,26 +71,26 @@ void luaD_reallocstack (lua_State *L, int newsize) {
 
 
 static void restore_stack_limit (lua_State *L) {
-  if (L->stacksize > L->maxstacksize) {  /* there was an overflow? */
+  if (L->stacksize > LUA_MAXSTACK) {  /* there was an overflow? */
     int inuse = (L->top - L->stack);
-    if (inuse + MAXSTACK < L->maxstacksize)  /* can `undo' overflow? */
-      luaD_reallocstack(L, L->maxstacksize);
+    if (inuse + MAXSTACK < LUA_MAXSTACK)  /* can `undo' overflow? */
+      luaD_reallocstack(L, LUA_MAXSTACK);
   }
 }
 
 
 void luaD_growstack (lua_State *L, int n) {
-  if (L->stacksize > L->maxstacksize) {  /* overflow while handling overflow? */
+  if (L->stacksize > LUA_MAXSTACK) {  /* overflow while handling overflow? */
     luaD_breakrun(L, LUA_ERRERR);  /* break run without error message */
   }
   else {
-    if (n <= L->stacksize && 2*L->stacksize < L->maxstacksize)  /* can double? */
+    if (n <= L->stacksize && 2*L->stacksize < LUA_MAXSTACK)  /* can double? */
       luaD_reallocstack(L, 2*L->stacksize);
-   else if (L->stacksize+n <= L->maxstacksize)  /* no overflow? */
-      luaD_reallocstack(L, L->maxstacksize);
+   else if (L->stacksize+n <= LUA_MAXSTACK)  /* no overflow? */
+      luaD_reallocstack(L, LUA_MAXSTACK);
    else {
       /* resize to maximum + some extra space to handle error */
-      luaD_reallocstack(L, L->maxstacksize+4*LUA_MINSTACK);
+      luaD_reallocstack(L, LUA_MAXSTACK+4*LUA_MINSTACK);
       luaD_error(L, "stack overflow");
     }
   }
@@ -428,9 +428,13 @@ LUA_API int lua_loadfile (lua_State *L, const char *filename) {
     f = fopen(filename, "rb");  /* reopen in binary mode */
     if (f == NULL) return LUA_ERRFILE;  /* unable to reopen file */
   }
-  lua_pushliteral(L, "@");
-  lua_pushstring(L, (filename == NULL) ? "=stdin" : filename);
-  lua_concat(L, 2);
+  if (filename == NULL)
+    lua_pushstring(L, "=stdin");
+  else {
+    lua_pushliteral(L, "@");
+    lua_pushstring(L, filename);
+    lua_concat(L, 2);
+  }
   nlevel = lua_gettop(L);
   filename = lua_tostring(L, -1);  /* filename = `@'..filename */
   luaZ_Fopen(&z, f, filename);
diff --git a/lstate.c b/lstate.c
index 1f30d03b..4f89a892 100644
--- a/lstate.c
+++ b/lstate.c
@@ -21,22 +21,12 @@
 
 
 
-struct Sopen {
-  lua_State *L;
-  int stacksize;
-};
-
 
 static void close_state (lua_State *L);
 
 
-static void stack_init (lua_State *L, lua_State *OL, int maxstacksize) {
-  if (maxstacksize == 0)
-    maxstacksize = DEFAULT_MAXSTACK;
-  else
-    maxstacksize += 2*LUA_MINSTACK;
+static void stack_init (lua_State *L, lua_State *OL) {
   L->stack = luaM_newvector(OL, BASIC_STACK_SIZE, TObject);
-  L->maxstacksize = maxstacksize;
   L->stacksize = BASIC_STACK_SIZE;
   L->top = L->stack + RESERVED_STACK_PREFIX;
   L->stack_last = L->stack+(BASIC_STACK_SIZE-EXTRA_STACK)-1;
@@ -53,7 +43,7 @@ static void stack_init (lua_State *L, lua_State *OL, int maxstacksize) {
 ** open parts that may cause memory-allocation errors
 */
 static void f_luaopen (lua_State *L, void *ud) {
-  struct Sopen *so = cast(struct Sopen *, ud);
+  UNUSED(ud);
   /* create a new global state */
   L->_G = luaM_new(L, global_State);
   G(L)->strt.size = 0;
@@ -68,7 +58,7 @@ static void f_luaopen (lua_State *L, void *ud) {
   G(L)->rootudata = NULL;
   G(L)->tmudata = NULL;
   G(L)->nblocks = sizeof(lua_State) + sizeof(global_State);
-  stack_init(L, L, so->stacksize);  /* init stack */
+  stack_init(L, L);  /* init stack */
   /* create default meta table with a dummy table, and then close the loop */
   sethvalue(defaultmeta(L), NULL);
   sethvalue(defaultmeta(L), luaH_new(L, 0, 4));
@@ -85,7 +75,6 @@ static void f_luaopen (lua_State *L, void *ud) {
 static void preinit_state (lua_State *L) {
   L->stack = NULL;
   L->stacksize = 0;
-  L->maxstacksize = 1;
   L->errorJmp = NULL;
   L->callhook = NULL;
   L->linehook = NULL;
@@ -96,7 +85,7 @@ static void preinit_state (lua_State *L) {
 }
 
 
-LUA_API lua_State *lua_newthread (lua_State *OL, int stacksize) {
+LUA_API lua_State *lua_newthread (lua_State *OL) {
   lua_State *L;
   lua_lock(OL);
   L = luaM_new(OL, lua_State);
@@ -106,7 +95,7 @@ LUA_API lua_State *lua_newthread (lua_State *OL, int stacksize) {
   L->next = OL->next;
   OL->next = L;
   L->previous = OL;
-  stack_init(L, OL, stacksize);  /* init stack */
+  stack_init(L, OL);  /* init stack */
   setobj(defaultmeta(L), defaultmeta(OL));  /* share default meta table */
   setobj(gt(L), gt(OL));  /* share table of globals */
   setobj(registry(L), registry(OL));  /* share registry */
@@ -116,17 +105,14 @@ LUA_API lua_State *lua_newthread (lua_State *OL, int stacksize) {
 }
 
 
-LUA_API lua_State *lua_open (int stacksize) {
-  struct Sopen so;
+LUA_API lua_State *lua_open (void) {
   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) {
+    if (luaD_runprotected(L, f_luaopen, NULL) != 0) {
       /* memory allocation error: free partial state */
       close_state(L);
       L = NULL;
diff --git a/lstate.h b/lstate.h
index f07dae36..8ba95a59 100644
--- a/lstate.h
+++ b/lstate.h
@@ -73,8 +73,9 @@ struct lua_longjmp;  /* defined in ldo.c */
 
 #define BASIC_STACK_SIZE        (2*LUA_MINSTACK)
 
-#define DEFAULT_MAXSTACK        12000
-
+#ifndef LUA_MAXSTACK
+#define LUA_MAXSTACK        14000
+#endif
 
 
 
@@ -141,7 +142,6 @@ struct lua_State {
   lua_State *next;  /* circular double linked list of states */
   lua_State *previous;
   int stacksize;
-  int maxstacksize;
   int size_ci;  /* size of array `base_ci' */
   int allowhooks;
   lua_Hook callhook;
diff --git a/ltests.c b/ltests.c
index 0785fa7b..4c040392 100644
--- a/ltests.c
+++ b/ltests.c
@@ -378,9 +378,9 @@ static int udataval (lua_State *L) {
 
 
 static int doonnewstack (lua_State *L) {
-  lua_State *L1 = lua_newthread(L, luaL_check_int(L, 1));
-  lua_dostring(L1, luaL_check_string(L, 2));
-  lua_pushnumber(L, 1);
+  lua_State *L1 = lua_newthread(L);
+  int status = lua_dostring(L1, luaL_check_string(L, 1));
+  lua_pushnumber(L, status);
   lua_closethread(L, L1);
   return 1;
 }
@@ -399,7 +399,7 @@ static int d2s (lua_State *L) {
 
 
 static int newstate (lua_State *L) {
-  lua_State *L1 = lua_open(luaL_check_int(L, 1));
+  lua_State *L1 = lua_open();
   if (L1) {
     *cast(int **, L1) = &islocked;  /* initialize the lock */
     lua_pushnumber(L, (unsigned long)L1);
diff --git a/lua.h b/lua.h
index a3fb1df5..e0e913b9 100644
--- a/lua.h
+++ b/lua.h
@@ -57,12 +57,12 @@ typedef int (*lua_CFunction) (lua_State *L);
 */
 #define LUA_TNONE       (-1)
 
-#define LUA_TUSERDATA   0
-#define LUA_TNIL        1
-#define LUA_TNUMBER     2
+#define LUA_TNIL        0
+#define LUA_TNUMBER     1
+#define LUA_TSTRING     2
 #define LUA_TBOOLEAN    3
-#define LUA_TSTRING     4
-#define LUA_TTABLE      5
+#define LUA_TTABLE      4
+#define LUA_TUSERDATA   5
 #define LUA_TFUNCTION   6
 
 
@@ -94,9 +94,9 @@ typedef LUA_NUMBER lua_Number;
 /*
 ** state manipulation
 */
-LUA_API lua_State *lua_open (int stacksize);
+LUA_API lua_State *lua_open (void);
 LUA_API void       lua_close (lua_State *L);
-LUA_API lua_State *lua_newthread (lua_State *L, int stacksize);
+LUA_API lua_State *lua_newthread (lua_State *L);
 LUA_API void       lua_closethread (lua_State *L, lua_State *thread);