diff options
Diffstat (limited to 'lib/lua/src/lstate.c')
-rw-r--r-- | lib/lua/src/lstate.c | 440 |
1 files changed, 220 insertions, 220 deletions
diff --git a/lib/lua/src/lstate.c b/lib/lua/src/lstate.c index f6dd14f..53eb6aa 100644 --- a/lib/lua/src/lstate.c +++ b/lib/lua/src/lstate.c @@ -1,220 +1,220 @@ -/* -** $Id: lstate.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Global State -** See Copyright Notice in lua.h -*/ - - -#include <stdlib.h> - -#define lstate_c - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "llex.h" -#include "lmem.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" - - -/* -** macro to allow the inclusion of user information in Lua state -*/ -#ifndef LUA_USERSTATE -#define EXTRASPACE 0 -#else -union UEXTRASPACE {L_Umaxalign a; LUA_USERSTATE b;}; -#define EXTRASPACE (sizeof(union UEXTRASPACE)) -#endif - - - -/* -** you can change this function through the official API: -** call `lua_setpanicf' -*/ -static int default_panic (lua_State *L) { - UNUSED(L); - return 0; -} - - -static lua_State *mallocstate (lua_State *L) { - lu_byte *block = (lu_byte *)luaM_malloc(L, sizeof(lua_State) + EXTRASPACE); - if (block == NULL) return NULL; - else { - block += EXTRASPACE; - return cast(lua_State *, block); - } -} - - -static void freestate (lua_State *L, lua_State *L1) { - luaM_free(L, cast(lu_byte *, L1) - EXTRASPACE, - sizeof(lua_State) + EXTRASPACE); -} - - -static void stack_init (lua_State *L1, lua_State *L) { - L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TObject); - L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK; - L1->top = L1->stack; - L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1; - L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo); - L1->ci = L1->base_ci; - L1->ci->state = CI_C; /* not a Lua function */ - setnilvalue(L1->top++); /* `function' entry for this `ci' */ - L1->base = L1->ci->base = L1->top; - L1->ci->top = L1->top + LUA_MINSTACK; - L1->size_ci = BASIC_CI_SIZE; - L1->end_ci = L1->base_ci + L1->size_ci; -} - - -static void freestack (lua_State *L, lua_State *L1) { - luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo); - luaM_freearray(L, L1->stack, L1->stacksize, TObject); -} - - -/* -** open parts that may cause memory-allocation errors -*/ -static void f_luaopen (lua_State *L, void *ud) { - /* create a new global state */ - global_State *g = luaM_new(NULL, global_State); - UNUSED(ud); - if (g == NULL) luaD_throw(L, LUA_ERRMEM); - L->l_G = g; - g->mainthread = L; - g->GCthreshold = 0; /* mark it as unfinished state */ - g->strt.size = 0; - g->strt.nuse = 0; - g->strt.hash = NULL; - setnilvalue(defaultmeta(L)); - setnilvalue(registry(L)); - luaZ_initbuffer(L, &g->buff); - g->panic = default_panic; - g->rootgc = NULL; - g->rootudata = NULL; - g->tmudata = NULL; - setnilvalue(gkey(g->dummynode)); - setnilvalue(gval(g->dummynode)); - g->dummynode->next = NULL; - g->nblocks = sizeof(lua_State) + sizeof(global_State); - stack_init(L, L); /* init stack */ - /* create default meta table with a dummy table, and then close the loop */ - defaultmeta(L)->tt = LUA_TTABLE; - sethvalue(defaultmeta(L), luaH_new(L, 0, 0)); - hvalue(defaultmeta(L))->metatable = hvalue(defaultmeta(L)); - sethvalue(gt(L), luaH_new(L, 0, 4)); /* table of globals */ - sethvalue(registry(L), luaH_new(L, 4, 4)); /* registry */ - luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */ - luaT_init(L); - luaX_init(L); - luaS_fix(luaS_newliteral(L, MEMERRMSG)); - g->GCthreshold = 4*G(L)->nblocks; -} - - -static void preinit_state (lua_State *L) { - L->stack = NULL; - L->stacksize = 0; - L->errorJmp = NULL; - L->hook = NULL; - L->hookmask = L->hookinit = 0; - L->basehookcount = 0; - L->allowhook = 1; - resethookcount(L); - L->openupval = NULL; - L->size_ci = 0; - L->nCcalls = 0; - L->base_ci = L->ci = NULL; - L->errfunc = 0; - setnilvalue(gt(L)); -} - - -static void close_state (lua_State *L) { - luaF_close(L, L->stack); /* close all upvalues for this thread */ - if (G(L)) { /* close global state */ - luaC_sweep(L, 1); /* collect all elements */ - lua_assert(G(L)->rootgc == NULL); - lua_assert(G(L)->rootudata == NULL); - luaS_freeall(L); - luaZ_freebuffer(L, &G(L)->buff); - } - freestack(L, L); - if (G(L)) { - lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State)); - luaM_freelem(NULL, G(L)); - } - freestate(NULL, L); -} - - -lua_State *luaE_newthread (lua_State *L) { - lua_State *L1 = mallocstate(L); - luaC_link(L, valtogco(L1), LUA_TTHREAD); - preinit_state(L1); - L1->l_G = L->l_G; - stack_init(L1, L); /* init stack */ - setobj2n(gt(L1), gt(L)); /* share table of globals */ - return L1; -} - - -void luaE_freethread (lua_State *L, lua_State *L1) { - luaF_close(L1, L1->stack); /* close all upvalues for this thread */ - lua_assert(L1->openupval == NULL); - freestack(L, L1); - freestate(L, L1); -} - - -LUA_API lua_State *lua_open (void) { - lua_State *L = mallocstate(NULL); - if (L) { /* allocation OK? */ - L->tt = LUA_TTHREAD; - L->marked = 0; - L->next = L->gclist = NULL; - preinit_state(L); - L->l_G = NULL; - if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) { - /* memory allocation error: free partial state */ - close_state(L); - L = NULL; - } - } - lua_userstateopen(L); - return L; -} - - -static void callallgcTM (lua_State *L, void *ud) { - UNUSED(ud); - luaC_callGCTM(L); /* call GC metamethods for all udata */ -} - - -LUA_API void lua_close (lua_State *L) { - lua_lock(L); - L = G(L)->mainthread; /* only the main thread can be closed */ - luaF_close(L, L->stack); /* close all upvalues for this thread */ - luaC_separateudata(L); /* separate udata that have GC metamethods */ - L->errfunc = 0; /* no error function during GC metamethods */ - do { /* repeat until no more errors */ - L->ci = L->base_ci; - L->base = L->top = L->ci->base; - L->nCcalls = 0; - } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0); - lua_assert(G(L)->tmudata == NULL); - close_state(L); -} - +/*
+** $Id: lstate.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lstate_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+/*
+** macro to allow the inclusion of user information in Lua state
+*/
+#ifndef LUA_USERSTATE
+#define EXTRASPACE 0
+#else
+union UEXTRASPACE {L_Umaxalign a; LUA_USERSTATE b;};
+#define EXTRASPACE (sizeof(union UEXTRASPACE))
+#endif
+
+
+
+/*
+** you can change this function through the official API:
+** call `lua_setpanicf'
+*/
+static int default_panic (lua_State *L) {
+ UNUSED(L);
+ return 0;
+}
+
+
+static lua_State *mallocstate (lua_State *L) {
+ lu_byte *block = (lu_byte *)luaM_malloc(L, sizeof(lua_State) + EXTRASPACE);
+ if (block == NULL) return NULL;
+ else {
+ block += EXTRASPACE;
+ return cast(lua_State *, block);
+ }
+}
+
+
+static void freestate (lua_State *L, lua_State *L1) {
+ luaM_free(L, cast(lu_byte *, L1) - EXTRASPACE,
+ sizeof(lua_State) + EXTRASPACE);
+}
+
+
+static void stack_init (lua_State *L1, lua_State *L) {
+ L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TObject);
+ L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
+ L1->top = L1->stack;
+ L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
+ L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
+ L1->ci = L1->base_ci;
+ L1->ci->state = CI_C; /* not a Lua function */
+ setnilvalue(L1->top++); /* `function' entry for this `ci' */
+ L1->base = L1->ci->base = L1->top;
+ L1->ci->top = L1->top + LUA_MINSTACK;
+ L1->size_ci = BASIC_CI_SIZE;
+ L1->end_ci = L1->base_ci + L1->size_ci;
+}
+
+
+static void freestack (lua_State *L, lua_State *L1) {
+ luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);
+ luaM_freearray(L, L1->stack, L1->stacksize, TObject);
+}
+
+
+/*
+** open parts that may cause memory-allocation errors
+*/
+static void f_luaopen (lua_State *L, void *ud) {
+ /* create a new global state */
+ global_State *g = luaM_new(NULL, global_State);
+ UNUSED(ud);
+ if (g == NULL) luaD_throw(L, LUA_ERRMEM);
+ L->l_G = g;
+ g->mainthread = L;
+ g->GCthreshold = 0; /* mark it as unfinished state */
+ g->strt.size = 0;
+ g->strt.nuse = 0;
+ g->strt.hash = NULL;
+ setnilvalue(defaultmeta(L));
+ setnilvalue(registry(L));
+ luaZ_initbuffer(L, &g->buff);
+ g->panic = default_panic;
+ g->rootgc = NULL;
+ g->rootudata = NULL;
+ g->tmudata = NULL;
+ setnilvalue(gkey(g->dummynode));
+ setnilvalue(gval(g->dummynode));
+ g->dummynode->next = NULL;
+ g->nblocks = sizeof(lua_State) + sizeof(global_State);
+ stack_init(L, L); /* init stack */
+ /* create default meta table with a dummy table, and then close the loop */
+ defaultmeta(L)->tt = LUA_TTABLE;
+ sethvalue(defaultmeta(L), luaH_new(L, 0, 0));
+ hvalue(defaultmeta(L))->metatable = hvalue(defaultmeta(L));
+ sethvalue(gt(L), luaH_new(L, 0, 4)); /* table of globals */
+ sethvalue(registry(L), luaH_new(L, 4, 4)); /* registry */
+ luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
+ luaT_init(L);
+ luaX_init(L);
+ luaS_fix(luaS_newliteral(L, MEMERRMSG));
+ g->GCthreshold = 4*G(L)->nblocks;
+}
+
+
+static void preinit_state (lua_State *L) {
+ L->stack = NULL;
+ L->stacksize = 0;
+ L->errorJmp = NULL;
+ L->hook = NULL;
+ L->hookmask = L->hookinit = 0;
+ L->basehookcount = 0;
+ L->allowhook = 1;
+ resethookcount(L);
+ L->openupval = NULL;
+ L->size_ci = 0;
+ L->nCcalls = 0;
+ L->base_ci = L->ci = NULL;
+ L->errfunc = 0;
+ setnilvalue(gt(L));
+}
+
+
+static void close_state (lua_State *L) {
+ luaF_close(L, L->stack); /* close all upvalues for this thread */
+ if (G(L)) { /* close global state */
+ luaC_sweep(L, 1); /* collect all elements */
+ lua_assert(G(L)->rootgc == NULL);
+ lua_assert(G(L)->rootudata == NULL);
+ luaS_freeall(L);
+ luaZ_freebuffer(L, &G(L)->buff);
+ }
+ freestack(L, L);
+ if (G(L)) {
+ lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State));
+ luaM_freelem(NULL, G(L));
+ }
+ freestate(NULL, L);
+}
+
+
+lua_State *luaE_newthread (lua_State *L) {
+ lua_State *L1 = mallocstate(L);
+ luaC_link(L, valtogco(L1), LUA_TTHREAD);
+ preinit_state(L1);
+ L1->l_G = L->l_G;
+ stack_init(L1, L); /* init stack */
+ setobj2n(gt(L1), gt(L)); /* share table of globals */
+ return L1;
+}
+
+
+void luaE_freethread (lua_State *L, lua_State *L1) {
+ luaF_close(L1, L1->stack); /* close all upvalues for this thread */
+ lua_assert(L1->openupval == NULL);
+ freestack(L, L1);
+ freestate(L, L1);
+}
+
+
+LUA_API lua_State *lua_open (void) {
+ lua_State *L = mallocstate(NULL);
+ if (L) { /* allocation OK? */
+ L->tt = LUA_TTHREAD;
+ L->marked = 0;
+ L->next = L->gclist = NULL;
+ preinit_state(L);
+ L->l_G = NULL;
+ if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
+ /* memory allocation error: free partial state */
+ close_state(L);
+ L = NULL;
+ }
+ }
+ lua_userstateopen(L);
+ return L;
+}
+
+
+static void callallgcTM (lua_State *L, void *ud) {
+ UNUSED(ud);
+ luaC_callGCTM(L); /* call GC metamethods for all udata */
+}
+
+
+LUA_API void lua_close (lua_State *L) {
+ lua_lock(L);
+ L = G(L)->mainthread; /* only the main thread can be closed */
+ luaF_close(L, L->stack); /* close all upvalues for this thread */
+ luaC_separateudata(L); /* separate udata that have GC metamethods */
+ L->errfunc = 0; /* no error function during GC metamethods */
+ do { /* repeat until no more errors */
+ L->ci = L->base_ci;
+ L->base = L->top = L->ci->base;
+ L->nCcalls = 0;
+ } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
+ lua_assert(G(L)->tmudata == NULL);
+ close_state(L);
+}
+
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