#include <stdlib.h>
#include <string.h>

Classes
struct	Service_status_msg
	Service status message providing an abstraction for the service message sent by monitor to client. More...

Enumerations
enum class	Signal_type { SIGNAL_SHUTDOWN , SIGNAL_SERVICE_STATUS_CMD , SIGNAL_SERVICE_STATUS_CMD_PROCESSED }
	Type indicating the type of signals which involve communication between the monitor and the mysqld. More...

enum class	Monitor_log_msg_type { MONITOR_LOG_ERROR , MONITOR_LOG_WARN , MONITOR_LOG_INFO }
	Type of messages logged by monitor logging. More...

Functions
bool	initialize_mysqld_monitor ()
	Initialize the mysqld monitor. More...

void	deinitialize_mysqld_monitor ()
	Deinitialize the monitor. More...

bool	send_service_status (const Service_status_msg &)
	Send service status message to the monitor. More...

void	close_service_status_pipe_in_mysqld ()
	Close the service status pipe. More...

const char *	get_monitor_pid ()
	Get char representation corresponding to MYSQLD_PARENT_PID. More...

void	signal_event (Signal_type signal)
	Signal an event of type Signal_type. More...

bool	is_early_option (int argc, char **argv)
	Check if option is an early type or –gdb, –no-monitor. More...

bool	is_mysqld_monitor ()
	Check if we are monitor process. More...

bool	is_monitor_win_service ()
	Check if the monitor is started under a windows service. More...

int	start_monitor ()
	Start the monitor if we are called in parent (monitor) context. More...

bool	setup_service_status_cmd_processed_handle ()
	Setup the service status command processed handle. More...

void	close_service_status_cmd_processed_handle ()
	Close the Service Status Cmd Processed handle. More...

bool	is_windows_service ()

NTService *	get_win_service_ptr ()

Enumeration Type Documentation

◆ Monitor_log_msg_type

enum class Monitor_log_msg_type

strong

Type of messages logged by monitor logging.

Enumerator
MONITOR_LOG_ERROR	Error log.
MONITOR_LOG_WARN	Warning log.
MONITOR_LOG_INFO	Information log.

◆ Signal_type

enum class Signal_type

strong

Type indicating the type of signals which involve communication between the monitor and the mysqld.

Enumerator

SIGNAL_SHUTDOWN

Shutdown signal from monitor to mysqld.

This is used to relay the shutdown that comes from the SCM.

SIGNAL_SERVICE_STATUS_CMD

Signal used to send the service status command to the monitor.

SIGNAL_SERVICE_STATUS_CMD_PROCESSED

Signal to the the mysqld from monitor indicating service status command has been processed.

Function Documentation

◆ close_service_status_cmd_processed_handle()

void close_service_status_cmd_processed_handle ( )

Close the Service Status Cmd Processed handle.

◆ close_service_status_pipe_in_mysqld()

void close_service_status_pipe_in_mysqld ( )

Close the service status pipe.

This method is called by the mysqld child process.

Close the service status pipe.

This call shall made in context of the mysqld process.

◆ deinitialize_mysqld_monitor()

void deinitialize_mysqld_monitor ( )

Deinitialize the monitor.

This method essentially closes any handles opened during initialization.

◆ get_monitor_pid()

const char * get_monitor_pid ( )

Get char representation corresponding to MYSQLD_PARENT_PID.

Returns: Pointer to string representing pid of the monitor.

◆ get_win_service_ptr()

NTService * get_win_service_ptr ( )

◆ initialize_mysqld_monitor()

bool initialize_mysqld_monitor ( )

Initialize the mysqld monitor.

This method is called from both the monitor and mysqld. It sets the variable that distinguishes the monitor and the mysqld. It also initialize the monitor logging subsystem if the process under which it is called is monitor.

◆ is_early_option()

bool is_early_option	(	int	argc,
		char **	argv
	)

Check if option is an early type or –gdb, –no-monitor.

The early type options are verbose, help, initialize, version and initialize-insecure. These options print and do certain activities and allow the server to exit. In addition there are options like gdb, no-monitor where we do not spawn a monitor process.

Parameters

argc	Count of arguments.
argv	Vector of arguments.

Returns: true if we are early option else false.

◆ is_monitor_win_service()

bool is_monitor_win_service ( )

Check if the monitor is started under a windows service.

Returns: true if the monitor is started as a windows service.

◆ is_mysqld_monitor()

bool is_mysqld_monitor ( )

Check if we are monitor process.

Returns: true if the current process is monitor else false.

◆ is_windows_service()

bool is_windows_service ( )

◆ send_service_status()

bool send_service_status ( const Service_status_msg & msg )

Send service status message to the monitor.

This method is used by mysqld to send service status like running and setting the slow timeout value.

◆ setup_service_status_cmd_processed_handle()

bool setup_service_status_cmd_processed_handle ( )

Setup the service status command processed handle.

This method is called from mysqld context. This handle ensures the synchronization required between the monitor and mysqld once the monitor has handled the service status sent by client.

Setup the service status command processed handle.

Returns: true if service status command processed handle could not be setup else false.

◆ signal_event()

void signal_event ( Signal_type signal )

Signal an event of type Signal_type.