JSignalHandler Namespace Reference

JSignalHandler bundles together the logic for querying a JApplication about its JStatus with signal handlers for USR1, USR2, and CTRL-C. More...

Functions
void	create_named_pipe (const std::string &path_to_named_pipe)
void	send_to_named_pipe (const std::string &path_to_named_pipe, const std::string &data)
void	produce_thread_report ()
void	produce_overall_report ()
	If something goes wrong, we want to signal all threads to assemble a report Whereas USR1 is meant to be triggered externally and is caught by one thread, produce_overall_report triggers USR2 and is caught by all threads. More...
void	handle_sigint (int)
	Handle SIGINT signals (e.g. More...
void	handle_usr1 (int)
void	handle_usr2 (int)
void	handle_sigsegv (int signal_number, siginfo_t *signal_info, void *context)
void	register_handlers (JApplication *app)
	Add special handles for system signals.

Variables
JApplication *	g_app
int	g_sigint_count = 0
JLogger *	g_logger
std::string	g_path_to_named_pipe = "/tmp/jana_status"
std::map< pthread_t, std::string >	g_thread_reports
std::atomic_int	g_thread_report_count

Detailed Description

JSignalHandler bundles together the logic for querying a JApplication about its JStatus with signal handlers for USR1, USR2, and CTRL-C.

Function Documentation

void JSignalHandler::handle_sigint

(

int

)

Handle SIGINT signals (e.g.

from hitting Ctrl-C). When a SIGINT is received, JANA will try and shutdown the program cleanly, allowing the processing threads to finish up the events they are working on. The first 2 SIGINT signals received will tell JANA to shutdown gracefully. On the 3rd SIGINT, the program will try to exit immediately.

References produce_overall_report().

Referenced by register_handlers().

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void JSignalHandler::produce_overall_report

(

)

If something goes wrong, we want to signal all threads to assemble a report Whereas USR1 is meant to be triggered externally and is caught by one thread, produce_overall_report triggers USR2 and is caught by all threads.

References JApplication::GetComponentSummary().

Referenced by handle_sigint().

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