void NativeToJsBridge::runOnExecutorQueue(ExecutorToken executorToken, std::function<void(JSExecutor*)> task) {
if (*m_destroyed) {
return;
}
auto executorMessageQueueThread = getMessageQueueThread(executorToken);
if (executorMessageQueueThread == nullptr) {
LOG(WARNING) << "Dropping JS action for executor that has been unregistered...";
return;
}
std::shared_ptr<bool> isDestroyed = m_destroyed;
executorMessageQueueThread->runOnQueue([this, isDestroyed, executorToken, task=std::move(task)] {
if (*isDestroyed) {
return;
}
JSExecutor *executor = getExecutor(executorToken);
if (executor == nullptr) {
LOG(WARNING) << "Dropping JS call for executor that has been unregistered...";
return;
}
// The executor is guaranteed to be valid for the duration of the task because:
// 1. the executor is only destroyed after it is unregistered
// 2. the executor is unregistered on this queue
// 3. we just confirmed that the executor hasn't been unregistered above
task(executor);
});
}
void NativeToJsBridge::destroy() {
m_delegate->quitQueueSynchronous();
auto* executorMessageQueueThread = getMessageQueueThread(m_mainExecutorToken);
executorMessageQueueThread->runOnQueueSync([this, executorMessageQueueThread] {
m_mainExecutor->destroy();
executorMessageQueueThread->quitSynchronous();
unregisterExecutor(*m_mainExecutor);
m_mainExecutor = nullptr;
*m_destroyed = true;
});
}
void NativeToJsBridge::destroy() {
m_delegate->quitQueueSynchronous();
auto* executorMessageQueueThread = getMessageQueueThread(m_mainExecutorToken);
// All calls made through runOnExecutorQueue have an early exit if
// m_destroyed is true. Setting this before the runOnQueueSync will cause
// pending work to be cancelled and we won't have to wait for it.
*m_destroyed = true;
executorMessageQueueThread->runOnQueueSync([this, executorMessageQueueThread] {
m_mainExecutor->destroy();
executorMessageQueueThread->quitSynchronous();
unregisterExecutor(*m_mainExecutor);
m_mainExecutor = nullptr;
});
}
void Bridge::callFunction(
ExecutorToken executorToken,
const std::string& moduleId,
const std::string& methodId,
const folly::dynamic& arguments,
const std::string& tracingName) {
if (*m_destroyed) {
return;
}
#ifdef WITH_FBSYSTRACE
int systraceCookie = m_systraceCookie++;
FbSystraceAsyncFlow::begin(
TRACE_TAG_REACT_CXX_BRIDGE,
tracingName.c_str(),
systraceCookie);
#endif
auto executorMessageQueueThread = getMessageQueueThread(executorToken);
if (executorMessageQueueThread == nullptr) {
LOG(WARNING) << "Dropping JS call for executor that has been unregistered...";
return;
}
std::shared_ptr<bool> isDestroyed = m_destroyed;
executorMessageQueueThread->runOnQueue([=] () {
#ifdef WITH_FBSYSTRACE
FbSystraceAsyncFlow::end(
TRACE_TAG_REACT_CXX_BRIDGE,
tracingName.c_str(),
systraceCookie);
FbSystraceSection s(TRACE_TAG_REACT_CXX_BRIDGE, tracingName.c_str());
#endif
if (*isDestroyed) {
return;
}
JSExecutor *executor = getExecutor(executorToken);
if (executor == nullptr) {
LOG(WARNING) << "Dropping JS call for executor that has been unregistered...";
return;
}
// This is safe because we are running on the executor's thread: it won't
// destruct until after it's been unregistered (which we check above) and
// that will happen on this thread
executor->callFunction(moduleId, methodId, arguments);
});
}
