fsw::poll_monitor Class Reference

stat()-based monitor. More...

#include <poll_monitor.hpp>

Inheritance diagram for fsw::poll_monitor:

Classes
struct	poll_monitor_data

Public Member Functions
	poll_monitor (std::vector< std::string > paths, FSW_EVENT_CALLBACK *callback, void *context=nullptr)
	Constructs an instance of this class.
virtual	~poll_monitor ()
	Destroys an instance of this class.
Public Member Functions inherited from fsw::monitor
	monitor (std::vector< std::string > paths, FSW_EVENT_CALLBACK *callback, void *context=nullptr)
	Constructs a monitor watching the specified paths. More...
virtual	~monitor ()
	Destructs a monitor instance. More...
	monitor (const monitor &orig)=delete
	This class is not copy constructible.
monitor &	operator= (const monitor &that)=delete
	This class is not copy assignable.
void	set_property (const std::string &name, const std::string &value)
	Sets a custom property. More...
void	set_properties (const std::map< std::string, std::string > options)
	Sets the custom properties. More...
std::string	get_property (std::string name)
	Gets the value of a property. More...
void	set_latency (double latency)
	Sets the latency. More...
void	set_fire_idle_event (bool fire_idle_event)
	Sets the fire idle event flag. More...
void	set_allow_overflow (bool overflow)
	Notify buffer overflows as change events. More...
void	set_recursive (bool recursive)
	Recursively scan subdirectories. More...
void	set_directory_only (bool directory_only)
	Watch directories only. More...
void	add_filter (const monitor_filter &filter)
	Add a path filter. More...
void	set_filters (const std::vector< monitor_filter > &filters)
	Set the path filters. More...
void	set_follow_symlinks (bool follow)
	Follow symlinks. More...
void *	get_context () const
	Get the pointer to the context data. More...
void	set_context (void *context)
	Set the context data. More...
void	start ()
	Start the monitor. More...
void	stop ()
	Stop the monitor. More...
bool	is_running ()
	Check whether the monitor is running. More...
void	add_event_type_filter (const fsw_event_type_filter &filter)
	Add an event type filter. More...
void	set_event_type_filters (const std::vector< fsw_event_type_filter > &filters)
	Set the event type filters. More...
void	set_watch_access (bool access)
	Monitor file access. More...

Protected Member Functions
void	run ()
	Execute monitor loop. More...
Protected Member Functions inherited from fsw::monitor
bool	accept_event_type (fsw_event_flag event_type) const
	Check whether an event should be accepted. More...
bool	accept_path (const std::string &path) const
	Check whether a path should be accepted. More...
bool	accept_path (const char *path) const
	Check whether a path should be accepted. More...
void	notify_events (const std::vector< event > &events) const
	Notify change events. More...
void	notify_overflow (const std::string &path) const
	Notify an overflow event. More...
std::vector< fsw_event_flag >	filter_flags (const event &evt) const
	Filter event types. More...
virtual void	on_stop ()
	Execute an implementation-specific stop handler. More...

Additional Inherited Members
Protected Attributes inherited from fsw::monitor
std::vector< std::string >	paths
	List of paths to watch. More...
std::map< std::string, std::string >	properties
	Map of custom properties. More...
FSW_EVENT_CALLBACK *	callback
	Callback to which change events should be notified. More...
void *	context = nullptr
	Pointer to context data that will be passed to the monitor::callback.
double	latency = 1.0
	Latency of the monitor.
bool	fire_idle_event = false
	If true, the monitor will notify an event when idle. More...
bool	allow_overflow = false
	If true, queue overflow events will be notified to the caller, otherwise the monitor will throw a libfsw_exception.
bool	recursive = false
	If true, directories will be scanned recursively.
bool	follow_symlinks = false
	If true, symbolic links are followed.
bool	directory_only = false
	Flag indicating whether only directories should be monitored.
bool	watch_access = false
	Flag indicating whether file access should be watched.
bool	running = false
	Flag indicating whether the monitor is in the running state.
bool	should_stop = false
	Flag indicating whether the monitor should preemptively stop.
std::mutex	run_mutex
	Mutex used to serialize access to the monitor state from multiple threads.
std::mutex	notify_mutex
	Mutex used to serialize access to the notify_events() method.

Detailed Description

stat()-based monitor.

This monitor uses the stat() function to periodically check the observed paths and detect changes.

Member Function Documentation

void fsw::poll_monitor::run ( )

protectedvirtual

Execute monitor loop.

This function implements the monitor event watching logic. This function is called from start() and it is executed on its thread. This function should block until the monitoring loop terminates: when it returns, the monitor is marked as stopped.

This function should cooperatively check the monitor::should_stop field locking monitor::run_mutex and return if set to true.

See also

start()

stop()

Implements fsw::monitor.

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

• libfswatch/c++/poll_monitor.hpp
• libfswatch/c++/poll_monitor.cpp