X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/b5422865f473faf3977f31b96a635c4c8c4ede09..9dae56ea45a0f5f8136a5c93d6f3a7f99399ca73:/bindings/runtime_root.cpp diff --git a/bindings/runtime_root.cpp b/bindings/runtime_root.cpp deleted file mode 100644 index aa1fa86..0000000 --- a/bindings/runtime_root.cpp +++ /dev/null @@ -1,309 +0,0 @@ -/* - * Copyright (C) 2004 Apple Computer, Inc. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "config.h" -#include "runtime_root.h" - -#include "JSGlobalObject.h" -#include "object.h" -#include "runtime.h" -#include "runtime_object.h" -#include -#include - -namespace KJS { namespace Bindings { - -// This code attempts to solve two problems: (1) plug-ins leaking references to -// JS and the DOM; (2) plug-ins holding stale references to JS and the DOM. Previous -// comments in this file claimed that problem #1 was an issue in Java, in particular, -// because Java, allegedly, didn't always call finalize when collecting an object. - -typedef HashSet RootObjectSet; - -static RootObjectSet* rootObjectSet() -{ - static RootObjectSet staticRootObjectSet; - return &staticRootObjectSet; -} - -// FIXME: These two functions are a potential performance problem. We could -// fix them by adding a JSObject to RootObject dictionary. - -RootObject* findProtectingRootObject(JSObject* jsObject) -{ - RootObjectSet::const_iterator end = rootObjectSet()->end(); - for (RootObjectSet::const_iterator it = rootObjectSet()->begin(); it != end; ++it) { - if ((*it)->gcIsProtected(jsObject)) - return *it; - } - return 0; -} - -RootObject* findRootObject(JSGlobalObject* globalObject) -{ - RootObjectSet::const_iterator end = rootObjectSet()->end(); - for (RootObjectSet::const_iterator it = rootObjectSet()->begin(); it != end; ++it) { - if ((*it)->globalObject() == globalObject) - return *it; - } - return 0; -} - -// May only be set by dispatchToJavaScriptThread(). -#if ENABLE(JAVA_BINDINGS) -static CFRunLoopSourceRef completionSource; - -static void completedJavaScriptAccess (void *i) -{ - assert (CFRunLoopGetCurrent() != RootObject::runLoop()); - - JSObjectCallContext *callContext = (JSObjectCallContext *)i; - CFRunLoopRef runLoop = (CFRunLoopRef)callContext->originatingLoop; - - assert (CFRunLoopGetCurrent() == runLoop); - - CFRunLoopStop(runLoop); -} - -static pthread_once_t javaScriptAccessLockOnce = PTHREAD_ONCE_INIT; -static pthread_mutex_t javaScriptAccessLock; -static int javaScriptAccessLockCount = 0; - -static void initializeJavaScriptAccessLock() -{ - pthread_mutexattr_t attr; - - pthread_mutexattr_init(&attr); - pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); - - pthread_mutex_init(&javaScriptAccessLock, &attr); -} - -static inline void lockJavaScriptAccess() -{ - // Perhaps add deadlock detection? - pthread_once(&javaScriptAccessLockOnce, initializeJavaScriptAccessLock); - pthread_mutex_lock(&javaScriptAccessLock); - javaScriptAccessLockCount++; -} - -static inline void unlockJavaScriptAccess() -{ - javaScriptAccessLockCount--; - pthread_mutex_unlock(&javaScriptAccessLock); -} - - -void RootObject::dispatchToJavaScriptThread(JSObjectCallContext *context) -{ - // This lock guarantees that only one thread can invoke - // at a time, and also guarantees that completionSource; - // won't get clobbered. - lockJavaScriptAccess(); - - CFRunLoopRef currentRunLoop = CFRunLoopGetCurrent(); - - assert (currentRunLoop != RootObject::runLoop()); - - // Setup a source to signal once the invocation of the JavaScript - // call completes. - // - // FIXME: This could be a potential performance issue. Creating and - // adding run loop sources is expensive. We could create one source - // per thread, as needed, instead. - context->originatingLoop = currentRunLoop; - CFRunLoopSourceContext sourceContext = {0, context, NULL, NULL, NULL, NULL, NULL, NULL, NULL, completedJavaScriptAccess}; - completionSource = CFRunLoopSourceCreate(NULL, 0, &sourceContext); - CFRunLoopAddSource(currentRunLoop, completionSource, kCFRunLoopDefaultMode); - - // Wakeup JavaScript access thread and make it do it's work. - CFRunLoopSourceSignal(RootObject::performJavaScriptSource()); - if (CFRunLoopIsWaiting(RootObject::runLoop())) { - CFRunLoopWakeUp(RootObject::runLoop()); - } - - // Wait until the JavaScript access thread is done. - CFRunLoopRun (); - - CFRunLoopRemoveSource(currentRunLoop, completionSource, kCFRunLoopDefaultMode); - CFRelease (completionSource); - - unlockJavaScriptAccess(); -} - -static void performJavaScriptAccess(void*) -{ - assert (CFRunLoopGetCurrent() == RootObject::runLoop()); - - // Dispatch JavaScript calls here. - CFRunLoopSourceContext sourceContext; - CFRunLoopSourceGetContext (completionSource, &sourceContext); - JSObjectCallContext *callContext = (JSObjectCallContext *)sourceContext.info; - CFRunLoopRef originatingLoop = callContext->originatingLoop; - - JavaJSObject::invoke (callContext); - - // Signal the originating thread that we're done. - CFRunLoopSourceSignal (completionSource); - if (CFRunLoopIsWaiting(originatingLoop)) { - CFRunLoopWakeUp(originatingLoop); - } -} -#endif // ENABLE(JAVA_BINDINGS) - -CreateRootObjectFunction RootObject::_createRootObject = 0; -CFRunLoopRef RootObject::_runLoop = 0; -CFRunLoopSourceRef RootObject::_performJavaScriptSource = 0; - -// Must be called from the thread that will be used to access JavaScript. -void RootObject::setCreateRootObject(CreateRootObjectFunction createRootObject) { - // Should only be called once. - ASSERT(!_createRootObject); - - _createRootObject = createRootObject; - - // Assume that we can retain this run loop forever. It'll most - // likely (always?) be the main loop. - _runLoop = (CFRunLoopRef)CFRetain (CFRunLoopGetCurrent ()); - - // Setup a source the other threads can use to signal the _runLoop - // thread that a JavaScript call needs to be invoked. - -#if ENABLE(JAVA_BINDINGS) - CFRunLoopSourceContext sourceContext = {0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, performJavaScriptAccess}; - RootObject::_performJavaScriptSource = CFRunLoopSourceCreate(NULL, 0, &sourceContext); - CFRunLoopAddSource(RootObject::_runLoop, RootObject::_performJavaScriptSource, kCFRunLoopDefaultMode); -#endif // ENABLE(JAVA_BINDINGS) -} - - -PassRefPtr RootObject::create(const void* nativeHandle, JSGlobalObject* globalObject) -{ - return new RootObject(nativeHandle, globalObject); -} - -RootObject::RootObject(const void* nativeHandle, JSGlobalObject* globalObject) - : m_isValid(true) - , m_nativeHandle(nativeHandle) - , m_globalObject(globalObject) -{ - ASSERT(globalObject); - rootObjectSet()->add(this); -} - -RootObject::~RootObject() -{ - if (m_isValid) - invalidate(); -} - -void RootObject::invalidate() -{ - if (!m_isValid) - return; - - { - HashSet::iterator end = m_runtimeObjects.end(); - for (HashSet::iterator it = m_runtimeObjects.begin(); it != end; ++it) - (*it)->invalidate(); - - m_runtimeObjects.clear(); - } - - m_isValid = false; - - m_nativeHandle = 0; - m_globalObject = 0; - - ProtectCountSet::iterator end = m_protectCountSet.end(); - for (ProtectCountSet::iterator it = m_protectCountSet.begin(); it != end; ++it) { - JSLock lock; - KJS::gcUnprotect(it->first); - } - m_protectCountSet.clear(); - - rootObjectSet()->remove(this); -} - -void RootObject::gcProtect(JSObject* jsObject) -{ - ASSERT(m_isValid); - - if (!m_protectCountSet.contains(jsObject)) { - JSLock lock; - KJS::gcProtect(jsObject); - } - m_protectCountSet.add(jsObject); -} - -void RootObject::gcUnprotect(JSObject* jsObject) -{ - ASSERT(m_isValid); - - if (!jsObject) - return; - - if (m_protectCountSet.count(jsObject) == 1) { - JSLock lock; - KJS::gcUnprotect(jsObject); - } - m_protectCountSet.remove(jsObject); -} - -bool RootObject::gcIsProtected(JSObject* jsObject) -{ - ASSERT(m_isValid); - return m_protectCountSet.contains(jsObject); -} - -const void* RootObject::nativeHandle() const -{ - ASSERT(m_isValid); - return m_nativeHandle; -} - -JSGlobalObject* RootObject::globalObject() const -{ - ASSERT(m_isValid); - return m_globalObject; -} - -void RootObject::addRuntimeObject(RuntimeObjectImp* object) -{ - ASSERT(m_isValid); - ASSERT(!m_runtimeObjects.contains(object)); - - m_runtimeObjects.add(object); -} - -void RootObject::removeRuntimeObject(RuntimeObjectImp* object) -{ - ASSERT(m_isValid); - ASSERT(m_runtimeObjects.contains(object)); - - m_runtimeObjects.remove(object); -} - -} } // namespace KJS::Bindings