C++ ProcessPtr::isAlive方法代码示例

bool
Group::shouldInitiateOobw(const ProcessPtr &process) const {
	return process->oobwStatus == Process::OOBW_REQUESTED
		&& process->enabled != Process::DETACHED
		&& process->isAlive()
		&& oobwAllowed();
}

void
Group::requestOOBW(const ProcessPtr &process) {
	// Standard resource management boilerplate stuff...
	PoolPtr pool = getPool();
	boost::unique_lock<boost::mutex> lock(pool->syncher);
	if (isAlive() && process->isAlive() && process->oobwStatus == Process::OOBW_NOT_ACTIVE) {
		process->oobwStatus = Process::OOBW_REQUESTED;
	}
}

bool
Pool::detachProcessUnlocked(const ProcessPtr &process,
	boost::container::vector<Callback> &postLockActions)
{
	if (OXT_LIKELY(process->isAlive())) {
		verifyInvariants();

		Group *group = process->getGroup();
		group->detach(process, postLockActions);
		// 'process' may now be a stale pointer so don't use it anymore.
		assignSessionsToGetWaiters(postLockActions);
		possiblySpawnMoreProcessesForExistingGroups();

		group->verifyInvariants();
		verifyInvariants();
		verifyExpensiveInvariants();

		return true;
	} else {
		return false;
	}
}

// The 'self' parameter is for keeping the current Group object alive while this thread is running.
void
Group::spawnThreadOOBWRequest(GroupPtr self, ProcessPtr process) {
	TRACE_POINT();
	this_thread::disable_interruption di;
	this_thread::disable_syscall_interruption dsi;

	Socket *socket;
	Connection connection;
	PoolPtr pool = getPool();
	Pool::DebugSupportPtr debug = pool->debugSupport;

	UPDATE_TRACE_POINT();
	P_DEBUG("Performing OOBW request for process " << process->inspect());
	if (debug != NULL && debug->oobw) {
		debug->debugger->send("OOBW request about to start");
		debug->messages->recv("Proceed with OOBW request");
	}
	
	UPDATE_TRACE_POINT();
	{
		// Standard resource management boilerplate stuff...
		boost::unique_lock<boost::mutex> lock(pool->syncher);
		if (OXT_UNLIKELY(!process->isAlive()
			|| process->enabled == Process::DETACHED
			|| !isAlive()))
		{
			return;
		}

		if (process->enabled != Process::DISABLED) {
			UPDATE_TRACE_POINT();
			P_INFO("Out-of-Band Work canceled: process " << process->inspect() <<
				" was concurrently re-enabled.");
			if (debug != NULL && debug->oobw) {
				debug->debugger->send("OOBW request canceled");
			}
			return;
		}
		
		assert(process->oobwStatus == Process::OOBW_IN_PROGRESS);
		assert(process->sessions == 0);
		socket = process->sessionSockets.top();
		assert(socket != NULL);
	}
	
	UPDATE_TRACE_POINT();
	unsigned long long timeout = 1000 * 1000 * 60; // 1 min
	try {
		this_thread::restore_interruption ri(di);
		this_thread::restore_syscall_interruption rsi(dsi);

		// Grab a connection. The connection is marked as fail in order to
		// ensure it is closed / recycled after this request (otherwise we'd
		// need to completely read the response).
		connection = socket->checkoutConnection();
		connection.fail = true;
		ScopeGuard guard(boost::bind(&Socket::checkinConnection, socket, connection));
		
		// This is copied from RequestHandler when it is sending data using the
		// "session" protocol.
		char sizeField[sizeof(uint32_t)];
		SmallVector<StaticString, 10> data;

		data.push_back(StaticString(sizeField, sizeof(uint32_t)));
		data.push_back(makeStaticStringWithNull("REQUEST_METHOD"));
		data.push_back(makeStaticStringWithNull("OOBW"));

		data.push_back(makeStaticStringWithNull("PASSENGER_CONNECT_PASSWORD"));
		data.push_back(makeStaticStringWithNull(process->connectPassword));

		uint32_t dataSize = 0;
		for (unsigned int i = 1; i < data.size(); i++) {
			dataSize += (uint32_t) data[i].size();
		}
		Uint32Message::generate(sizeField, dataSize);

		gatheredWrite(connection.fd, &data[0], data.size(), &timeout);

		// We do not care what the actual response is ... just wait for it.
		UPDATE_TRACE_POINT();
		waitUntilReadable(connection.fd, &timeout);
	} catch (const SystemException &e) {
		P_ERROR("*** ERROR: " << e.what() << "\n" << e.backtrace());
	} catch (const TimeoutException &e) {
		P_ERROR("*** ERROR: " << e.what() << "\n" << e.backtrace());
	}
	
	UPDATE_TRACE_POINT();
	vector<Callback> actions;
	{
		// Standard resource management boilerplate stuff...
		PoolPtr pool = getPool();
		boost::unique_lock<boost::mutex> lock(pool->syncher);
		if (OXT_UNLIKELY(!process->isAlive() || !isAlive())) {
			return;
		}
		
		process->oobwStatus = Process::OOBW_NOT_ACTIVE;
		if (process->enabled == Process::DISABLED) {
//.........这里部分代码省略.........

void
Session::requestOOBW() {
	ProcessPtr process = getProcess();
	assert(process->isAlive());
	process->getGroup()->requestOOBW(process);
}