| /* |
| ** $Id: lstate.c,v 1.38 2000/09/11 19:42:57 roberto Exp roberto $ |
| ** Global State |
| ** See Copyright Notice in lua.h |
| */ |
| |
| |
| #include <stdio.h> |
| |
| #include "lua.h" |
| |
| #include "ldo.h" |
| #include "lgc.h" |
| #include "llex.h" |
| #include "lmem.h" |
| #include "lstate.h" |
| #include "lstring.h" |
| #include "ltable.h" |
| #include "ltm.h" |
| |
| |
| #ifdef DEBUG |
| extern lua_State *lua_state; |
| void luaB_opentests (lua_State *L); |
| #endif |
| |
| |
| /* |
| ** built-in implementation for ERRORMESSAGE. In a "correct" environment |
| ** ERRORMESSAGE should have an external definition, and so this function |
| ** would not be used. |
| */ |
| static int errormessage (lua_State *L) { |
| const char *s = lua_tostring(L, 1); |
| if (s == NULL) s = "(no message)"; |
| fprintf(stderr, "error: %s\n", s); |
| return 0; |
| } |
| |
| |
| lua_State *lua_open (int stacksize) { |
| struct lua_longjmp myErrorJmp; |
| lua_State *L = luaM_new(NULL, lua_State); |
| if (L == NULL) return NULL; /* memory allocation error */ |
| L->stack = NULL; |
| L->strt.size = L->udt.size = 0; |
| L->strt.nuse = L->udt.nuse = 0; |
| L->strt.hash = NULL; |
| L->udt.hash = NULL; |
| L->Mbuffer = NULL; |
| L->Mbuffsize = 0; |
| L->rootproto = NULL; |
| L->rootcl = NULL; |
| L->roottable = NULL; |
| L->IMtable = NULL; |
| L->last_tag = -1; |
| L->refArray = NULL; |
| L->refSize = 0; |
| L->refFree = NONEXT; |
| L->nblocks = 0; |
| L->GCthreshold = MAX_INT; /* to avoid GC during pre-definitions */ |
| L->callhook = NULL; |
| L->linehook = NULL; |
| L->allowhooks = 1; |
| L->errorJmp = &myErrorJmp; |
| if (setjmp(myErrorJmp.b) == 0) { /* to catch memory allocation errors */ |
| L->gt = luaH_new(L, 10); |
| luaD_init(L, (stacksize == 0) ? DEFAULT_STACK_SIZE : |
| stacksize+LUA_MINSTACK); |
| luaS_init(L); |
| luaX_init(L); |
| luaT_init(L); |
| lua_register(L, LUA_ERRORMESSAGE, errormessage); |
| #ifdef DEBUG |
| luaB_opentests(L); |
| #endif |
| L->GCthreshold = L->nblocks*4; |
| L->errorJmp = NULL; |
| return L; |
| } |
| else { /* memory allocation error: free partial state */ |
| lua_close(L); |
| return NULL; |
| } |
| } |
| |
| |
| void lua_close (lua_State *L) { |
| luaC_collect(L, 1); /* collect all elements */ |
| LUA_ASSERT(L->rootproto == NULL, "list should be empty"); |
| LUA_ASSERT(L->rootcl == NULL, "list should be empty"); |
| LUA_ASSERT(L->roottable == NULL, "list should be empty"); |
| luaS_freeall(L); |
| luaM_free(L, L->stack); |
| luaM_free(L, L->IMtable); |
| luaM_free(L, L->refArray); |
| luaM_free(L, L->Mbuffer); |
| LUA_ASSERT(L->nblocks == 0, "wrong count for nblocks"); |
| luaM_free(L, L); |
| LUA_ASSERT(L->Cbase == L->stack, "stack not empty"); |
| LUA_ASSERT(L != lua_state || memdebug_numblocks == 0, "memory leak!"); |
| LUA_ASSERT(L != lua_state || memdebug_total == 0,"memory leak!"); |
| } |
| |