JSContext *
js_NewContext(JSRuntime *rt, size_t stackChunkSize)
{
JSContext *cx;
JSBool ok, first;
cx = (JSContext *) malloc(sizeof *cx);
if (!cx)
return NULL;
memset(cx, 0, sizeof *cx);
cx->runtime = rt;
#ifdef JS_THREADSAFE
js_InitContextForLocking(cx);
#endif
JS_LOCK_RUNTIME(rt);
for (;;) {
first = (rt->contextList.next == &rt->contextList);
if (rt->state == JSRTS_UP) {
JS_ASSERT(!first);
break;
}
if (rt->state == JSRTS_DOWN) {
JS_ASSERT(first);
rt->state = JSRTS_LAUNCHING;
break;
}
JS_WAIT_CONDVAR(rt->stateChange, JS_NO_TIMEOUT);
}
JS_APPEND_LINK(&cx->links, &rt->contextList);
JS_UNLOCK_RUNTIME(rt);
/*
* First we do the infallible, every-time per-context initializations.
* Should a later, fallible initialization (js_InitRegExpStatics, e.g.,
* or the stuff under 'if (first)' below) fail, at least the version
* and arena-pools will be valid and safe to use (say, from the last GC
* done by js_DestroyContext).
*/
cx->version = JSVERSION_DEFAULT;
cx->jsop_eq = JSOP_EQ;
cx->jsop_ne = JSOP_NE;
JS_InitArenaPool(&cx->stackPool, "stack", stackChunkSize, sizeof(jsval));
JS_InitArenaPool(&cx->codePool, "code", 1024, sizeof(jsbytecode));
JS_InitArenaPool(&cx->notePool, "note", 1024, sizeof(jssrcnote));
JS_InitArenaPool(&cx->tempPool, "temp", 1024, sizeof(jsdouble));
#if JS_HAS_REGEXPS
if (!js_InitRegExpStatics(cx, &cx->regExpStatics)) {
js_DestroyContext(cx, JS_NO_GC);
return NULL;
}
#endif
#if JS_HAS_EXCEPTIONS
cx->throwing = JS_FALSE;
#endif
/*
* If cx is the first context on this runtime, initialize well-known atoms,
* keywords, numbers, and strings. If one of these steps should fail, the
* runtime will be left in a partially initialized state, with zeroes and
* nulls stored in the default-initialized remainder of the struct. We'll
* clean the runtime up under js_DestroyContext, because cx will be "last"
* as well as "first".
*/
if (first) {
ok = (rt->atomState.liveAtoms == 0)
? js_InitAtomState(cx, &rt->atomState)
: js_InitPinnedAtoms(cx, &rt->atomState);
if (ok)
ok = js_InitScanner(cx);
if (ok)
ok = js_InitRuntimeNumberState(cx);
if (ok)
ok = js_InitRuntimeStringState(cx);
if (!ok) {
js_DestroyContext(cx, JS_NO_GC);
return NULL;
}
JS_LOCK_RUNTIME(rt);
rt->state = JSRTS_UP;
JS_NOTIFY_ALL_CONDVAR(rt->stateChange);
JS_UNLOCK_RUNTIME(rt);
}
return cx;
}
JSContext *
js_NewContext(JSRuntime *rt, size_t stackChunkSize)
{
JSContext *cx;
JSBool ok, first;
JSContextCallback cxCallback;
cx = (JSContext *) malloc(sizeof *cx);
if (!cx)
return NULL;
memset(cx, 0, sizeof *cx);
cx->runtime = rt;
#if JS_STACK_GROWTH_DIRECTION > 0
cx->stackLimit = (jsuword)-1;
#endif
#ifdef JS_THREADSAFE
JS_INIT_CLIST(&cx->threadLinks);
js_SetContextThread(cx);
#endif
JS_LOCK_GC(rt);
for (;;) {
first = (rt->contextList.next == &rt->contextList);
if (rt->state == JSRTS_UP) {
JS_ASSERT(!first);
break;
}
if (rt->state == JSRTS_DOWN) {
JS_ASSERT(first);
rt->state = JSRTS_LAUNCHING;
break;
}
JS_WAIT_CONDVAR(rt->stateChange, JS_NO_TIMEOUT);
}
JS_APPEND_LINK(&cx->links, &rt->contextList);
JS_UNLOCK_GC(rt);
/*
* First we do the infallible, every-time per-context initializations.
* Should a later, fallible initialization (js_InitRegExpStatics, e.g.,
* or the stuff under 'if (first)' below) fail, at least the version
* and arena-pools will be valid and safe to use (say, from the last GC
* done by js_DestroyContext).
*/
cx->version = JSVERSION_DEFAULT;
cx->jsop_eq = JSOP_EQ;
cx->jsop_ne = JSOP_NE;
JS_InitArenaPool(&cx->stackPool, "stack", stackChunkSize, sizeof(jsval));
JS_InitArenaPool(&cx->tempPool, "temp", 1024, sizeof(jsdouble));
if (!js_InitRegExpStatics(cx, &cx->regExpStatics)) {
js_DestroyContext(cx, JSDCM_NEW_FAILED);
return NULL;
}
/*
* If cx is the first context on this runtime, initialize well-known atoms,
* keywords, numbers, and strings. If one of these steps should fail, the
* runtime will be left in a partially initialized state, with zeroes and
* nulls stored in the default-initialized remainder of the struct. We'll
* clean the runtime up under js_DestroyContext, because cx will be "last"
* as well as "first".
*/
if (first) {
#ifdef JS_THREADSAFE
JS_BeginRequest(cx);
#endif
/*
* Both atomState and the scriptFilenameTable may be left over from a
* previous episode of non-zero contexts alive in rt, so don't re-init
* either table if it's not necessary. Just repopulate atomState with
* well-known internal atoms, and with the reserved identifiers added
* by the scanner.
*/
ok = (rt->atomState.liveAtoms == 0)
? js_InitAtomState(cx, &rt->atomState)
: js_InitPinnedAtoms(cx, &rt->atomState);
if (ok && !rt->scriptFilenameTable)
ok = js_InitRuntimeScriptState(rt);
if (ok)
ok = js_InitRuntimeNumberState(cx);
if (ok)
ok = js_InitRuntimeStringState(cx);
#ifdef JS_THREADSAFE
JS_EndRequest(cx);
#endif
if (!ok) {
js_DestroyContext(cx, JSDCM_NEW_FAILED);
return NULL;
}
JS_LOCK_GC(rt);
rt->state = JSRTS_UP;
JS_NOTIFY_ALL_CONDVAR(rt->stateChange);
JS_UNLOCK_GC(rt);
}
cxCallback = rt->cxCallback;
if (cxCallback && !cxCallback(cx, JSCONTEXT_NEW)) {
js_DestroyContext(cx, JSDCM_NEW_FAILED);
return NULL;
}
return cx;
}