C++ ProcessPtr::inspect方法代码示例

void
Group::initiateOobw(const ProcessPtr &process) {
	assert(process->oobwStatus == Process::OOBW_REQUESTED);

	process->oobwStatus = Process::OOBW_IN_PROGRESS;

	if (process->enabled == Process::ENABLED
	 || process->enabled == Process::DISABLING)
	{
		// We want the process to be disabled. However, disabling a process is potentially
		// asynchronous, so we pass a callback which will re-aquire the lock and call this
		// method again.
		P_DEBUG("Disabling process " << process->inspect() << " in preparation for OOBW");
		DisableResult result = disable(process,
			boost::bind(&Group::lockAndMaybeInitiateOobw, this,
				_1, _2, shared_from_this()));
		switch (result) {
		case DR_SUCCESS:
			// Continue code flow.
			break;
		case DR_DEFERRED:
			// lockAndMaybeInitiateOobw() will eventually be called.
			return;
		case DR_ERROR:
		case DR_NOOP:
			P_DEBUG("Out-of-band work for process " << process->inspect() << " aborted "
				"because the process could not be disabled");
			process->oobwStatus = Process::OOBW_NOT_ACTIVE;
			return;
		default:
			P_BUG("Unexpected disable() result " << result);
		}
	}
	
	assert(process->enabled == Process::DISABLED);
	assert(process->sessions == 0);
	
	P_DEBUG("Initiating OOBW request for process " << process->inspect());
	interruptableThreads.create_thread(
		boost::bind(&Group::spawnThreadOOBWRequest, this, shared_from_this(), process),
		"OOBW request thread for process " + process->inspect(),
		POOL_HELPER_THREAD_STACK_SIZE);
}

// The 'self' parameter is for keeping the current Group object alive
void
Group::lockAndMaybeInitiateOobw(const ProcessPtr &process, DisableResult result, GroupPtr self) {
	TRACE_POINT();
	
	// Standard resource management boilerplate stuff...
	PoolPtr pool = getPool();
	boost::unique_lock<boost::mutex> lock(pool->syncher);
	if (OXT_UNLIKELY(!process->isAlive() || !isAlive())) {
		return;
	}

	assert(process->oobwStatus == Process::OOBW_IN_PROGRESS);

	if (result == DR_SUCCESS) {
		if (process->enabled == Process::DISABLED) {
			P_DEBUG("Process " << process->inspect() << " disabled; proceeding " <<
				"with out-of-band work");
			process->oobwStatus = Process::OOBW_REQUESTED;
			if (shouldInitiateOobw(process)) {
				initiateOobw(process);
			} else {
				// We do not re-enable the process because it's likely that the
				// administrator has explicitly changed the state.
				P_DEBUG("Out-of-band work for process " << process->inspect() << " aborted "
					"because the process no longer requests out-of-band work");
				process->oobwStatus = Process::OOBW_NOT_ACTIVE;
			}
		} else {
			// We do not re-enable the process because it's likely that the
			// administrator has explicitly changed the state.
			P_DEBUG("Out-of-band work for process " << process->inspect() << " aborted "
				"because the process was reenabled after disabling");
			process->oobwStatus = Process::OOBW_NOT_ACTIVE;
		}
	} else {
		P_DEBUG("Out-of-band work for process " << process->inspect() << " aborted "
			"because the process could not be disabled");
		process->oobwStatus = Process::OOBW_NOT_ACTIVE;
	}
}

/**
 * Calls Group::detach() so be sure to fix up the invariants afterwards.
 * See the comments for Group::detach() and the code for detachProcessUnlocked().
 */
ProcessPtr
Pool::forceFreeCapacity(const Group *exclude,
	boost::container::vector<Callback> &postLockActions)
{
	ProcessPtr process = findOldestIdleProcess(exclude);
	if (process != NULL) {
		P_DEBUG("Forcefully detaching process " << process->inspect() <<
			" in order to free capacity in the pool");

		Group *group = process->getGroup();
		assert(group != NULL);
		assert(group->getWaitlist.empty());

		group->detach(process, postLockActions);
	}
	return process;
}

void
Group::spawnThreadRealMain(const SpawnerPtr &spawner, const Options &options, unsigned int restartsInitiated) {
	TRACE_POINT();
	this_thread::disable_interruption di;
	this_thread::disable_syscall_interruption dsi;

	PoolPtr pool = getPool();
	Pool::DebugSupportPtr debug = pool->debugSupport;
	
	bool done = false;
	while (!done) {
		bool shouldFail = false;
		if (debug != NULL && debug->spawning) {
			UPDATE_TRACE_POINT();
			this_thread::restore_interruption ri(di);
			this_thread::restore_syscall_interruption rsi(dsi);
			this_thread::interruption_point();
			string iteration;
			{
				LockGuard g(debug->syncher);
				debug->spawnLoopIteration++;
				iteration = toString(debug->spawnLoopIteration);
			}
			P_DEBUG("Begin spawn loop iteration " << iteration);
			debug->debugger->send("Begin spawn loop iteration " +
				iteration);
			
			vector<string> cases;
			cases.push_back("Proceed with spawn loop iteration " + iteration);
			cases.push_back("Fail spawn loop iteration " + iteration);
			MessagePtr message = debug->messages->recvAny(cases);
			shouldFail = message->name == "Fail spawn loop iteration " + iteration;
		}

		ProcessPtr process;
		ExceptionPtr exception;
		try {
			UPDATE_TRACE_POINT();
			this_thread::restore_interruption ri(di);
			this_thread::restore_syscall_interruption rsi(dsi);
			if (shouldFail) {
				throw SpawnException("Simulated failure");
			} else {
				process = spawner->spawn(options);
				process->setGroup(shared_from_this());
			}
		} catch (const thread_interrupted &) {
			break;
		} catch (const tracable_exception &e) {
			exception = copyException(e);
			// Let other (unexpected) exceptions crash the program so
			// gdb can generate a backtrace.
		}

		UPDATE_TRACE_POINT();
		ScopeGuard guard(boost::bind(Process::forceTriggerShutdownAndCleanup, process));
		boost::unique_lock<boost::mutex> lock(pool->syncher);

		if (!isAlive()) {
			if (process != NULL) {
				P_DEBUG("Group is being shut down so dropping process " <<
					process->inspect() << " which we just spawned and exiting spawn loop");
			} else {
				P_DEBUG("The group is being shut down. A process failed "
					"to be spawned anyway, so ignoring this error and exiting "
					"spawn loop");
			}
			// We stop immediately because any previously assumed invariants
			// may have been violated.
			break;
		} else if (restartsInitiated != this->restartsInitiated) {
			if (process != NULL) {
				P_DEBUG("A restart was issued for the group, so dropping process " <<
					process->inspect() << " which we just spawned and exiting spawn loop");
			} else {
				P_DEBUG("A restart was issued for the group. A process failed "
					"to be spawned anyway, so ignoring this error and exiting "
					"spawn loop");
			}
			// We stop immediately because any previously assumed invariants
			// may have been violated.
			break;
		}

		verifyInvariants();
		assert(m_spawning);
		assert(processesBeingSpawned > 0);

		processesBeingSpawned--;
		assert(processesBeingSpawned == 0);

		UPDATE_TRACE_POINT();
		vector<Callback> actions;
		if (process != NULL) {
			AttachResult result = attach(process, actions);
			if (result == AR_OK) {
				guard.clear();
				if (getWaitlist.empty()) {
					pool->assignSessionsToGetWaiters(actions);
				} else {
//.........这里部分代码省略.........