ola::thread::SignalThread Class Reference

Detailed Description

Signals and threads don't play nicely together. Consider the following:

• thread1, acquires mutex M
• signal triggers
• thread1 runs the signal handler
• signal handler attempts to aqcuire mutex M
• deadlock...

The recommended way to deal with this is to run a separate thread, whose sole purpose is to wait for signals. See section 12.8 of APUE.

To avoid this we do the following:

• mask all signals that we define custom handlers for
• spawn a thread which uses sigwait() to capture signals

Inheritance diagram for ola::thread::SignalThread:

Collaboration diagram for ola::thread::SignalThread:

Public Types
typedef ola::Callback0< void >	SignalHandler

Public Member Functions
bool	InstallSignalHandler (int signal, SignalHandler *handler)
	Install a signal handler for the given signal.
Public Member Functions inherited from ola::thread::Thread
	Thread (const Options &options=Options())
	Create a new thread with the specified thread options.
virtual	~Thread ()
	Destructor.
virtual bool	Start ()
	Start the thread and wait for the thread to be running.
virtual bool	FastStart ()
	Start the thread and return immediately.
virtual bool	Join (void *ptr=NULL)
	Join this thread.
bool	IsRunning ()
	Check if the thread is running.
ThreadId	Id () const
	Return the thread id.
std::string	Name () const
	Return the thread name.

Protected Member Functions
void *	Run ()
	Entry point into the thread.

Additional Inherited Members
Static Public Member Functions inherited from ola::thread::Thread
static ThreadId	Self ()
	Returns the current thread's id.

Member Function Documentation

bool ola::thread::SignalThread::InstallSignalHandler	(	int	signal,
		SignalHandler *	handler
	)

Install a signal handler for the given signal.

This can't be called once the thread has stared.

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The documentation for this class was generated from the following files:

• include/ola/thread/SignalThread.h
• common/thread/SignalThread.cpp