Wrappers for and extensions to glib mainloop. More...

#include <stdbool.h>
#include <signal.h>
#include <sys/types.h>
#include <glib.h>
#include <qb/qbipcs.h>
#include <crm/common/ipc.h>

Include dependency graph for mainloop.h:

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Go to the source code of this file.

Data Structures
struct	ipc_client_callbacks

struct	mainloop_fd_callbacks

Macros
#define	G_PRIORITY_MEDIUM (G_PRIORITY_HIGH/2)

Typedefs
typedef struct trigger_s	crm_trigger_t

typedef struct mainloop_io_s	mainloop_io_t

typedef struct mainloop_child_s	mainloop_child_t

typedef struct mainloop_timer_s	mainloop_timer_t

typedef void(*	sighandler_t) (int)

Enumerations
enum	mainloop_child_flags { mainloop_leave_pid_group = 0x01 }

Functions
void	mainloop_cleanup (void)

crm_trigger_t *	mainloop_add_trigger (int priority, int(*dispatch)(gpointer user_data), gpointer userdata)
	Create a trigger to be used as a mainloop source.

void	mainloop_set_trigger (crm_trigger_t *source)

void	mainloop_trigger_complete (crm_trigger_t *trig)

gboolean	mainloop_destroy_trigger (crm_trigger_t *source)

sighandler_t	crm_signal_handler (int sig, sighandler_t dispatch)

gboolean	mainloop_add_signal (int sig, void(*dispatch)(int sig))

gboolean	mainloop_destroy_signal (int sig)

bool	mainloop_timer_running (mainloop_timer_t *t)

void	mainloop_timer_start (mainloop_timer_t *t)

void	mainloop_timer_stop (mainloop_timer_t *t)

guint	mainloop_timer_set_period (mainloop_timer_t *t, guint period_ms)

mainloop_timer_t *	mainloop_timer_add (const char name, guint period_ms, bool repeat, GSourceFunc cb, void userdata)

void	mainloop_timer_del (mainloop_timer_t *t)

qb_ipcs_service_t *	mainloop_add_ipc_server (const char name, enum qb_ipc_type type, struct qb_ipcs_service_handlers callbacks)

qb_ipcs_service_t *	mainloop_add_ipc_server_with_prio (const char name, enum qb_ipc_type type, struct qb_ipcs_service_handlers callbacks, enum qb_loop_priority prio)
	Start server-side API end-point, hooked into the internal event loop.

void	mainloop_del_ipc_server (qb_ipcs_service_t *server)

mainloop_io_t *	mainloop_add_ipc_client (const char name, int priority, size_t max_size, void userdata, struct ipc_client_callbacks *callbacks)

void	mainloop_del_ipc_client (mainloop_io_t *client)

crm_ipc_t *	mainloop_get_ipc_client (mainloop_io_t *client)

mainloop_io_t *	mainloop_add_fd (const char name, int priority, int fd, void userdata, struct mainloop_fd_callbacks *callbacks)

void	mainloop_del_fd (mainloop_io_t *client)

void	mainloop_child_add (pid_t pid, int timeout, const char desc, void userdata, void(callback)(mainloop_child_t p, pid_t pid, int core, int signo, int exitcode))

void	mainloop_child_add_with_flags (pid_t pid, int timeout, const char desc, void userdata, enum mainloop_child_flags, void(callback)(mainloop_child_t p, pid_t pid, int core, int signo, int exitcode))

void *	mainloop_child_userdata (mainloop_child_t *child)

int	mainloop_child_timeout (mainloop_child_t *child)

const char *	mainloop_child_name (mainloop_child_t *child)

pid_t	mainloop_child_pid (mainloop_child_t *child)

void	mainloop_clear_child_userdata (mainloop_child_t *child)

gboolean	mainloop_child_kill (pid_t pid)

void	pcmk_quit_main_loop (GMainLoop *mloop, unsigned int n)
	Drain some remaining main loop events then quit it.

void	pcmk_drain_main_loop (GMainLoop mloop, guint timer_ms, bool(check)(guint))
	Process main loop events while a certain condition is met.

Detailed Description

Wrappers for and extensions to glib mainloop.

Definition in file mainloop.h.

Macro Definition Documentation

◆ G_PRIORITY_MEDIUM

#define G_PRIORITY_MEDIUM (G_PRIORITY_HIGH/2)

Definition at line 195 of file mainloop.h.

Typedef Documentation

◆ crm_trigger_t

typedef struct trigger_s crm_trigger_t

Definition at line 39 of file mainloop.h.

◆ mainloop_child_t

typedef struct mainloop_child_s mainloop_child_t

Definition at line 42 of file mainloop.h.

◆ mainloop_io_t

typedef struct mainloop_io_s mainloop_io_t

Definition at line 41 of file mainloop.h.

◆ mainloop_timer_t

typedef struct mainloop_timer_s mainloop_timer_t

Definition at line 45 of file mainloop.h.

◆ sighandler_t

typedef void(* sighandler_t) (int)

Definition at line 61 of file mainloop.h.

Enumeration Type Documentation

◆ mainloop_child_flags

enum mainloop_child_flags

Enumerator
mainloop_leave_pid_group

Definition at line 33 of file mainloop.h.

Function Documentation

◆ crm_signal_handler()

sighandler_t crm_signal_handler	(	int	sig,
		sighandler_t	dispatch )

Definition at line 304 of file mainloop.c.

◆ mainloop_add_fd()

mainloop_io_t * mainloop_add_fd	(	const char *	name,
		int	priority,
		int	fd,
		void *	userdata,
		struct mainloop_fd_callbacks *	callbacks )

Definition at line 962 of file mainloop.c.

◆ mainloop_add_ipc_client()

mainloop_io_t * mainloop_add_ipc_client	(	const char *	name,
		int	priority,
		size_t	max_size,
		void *	userdata,
		struct ipc_client_callbacks *	callbacks )

Definition at line 922 of file mainloop.c.

◆ mainloop_add_ipc_server()

qb_ipcs_service_t * mainloop_add_ipc_server	(	const char *	name,
		enum qb_ipc_type	type,
		struct qb_ipcs_service_handlers *	callbacks )

Definition at line 637 of file mainloop.c.

◆ mainloop_add_ipc_server_with_prio()

qb_ipcs_service_t * mainloop_add_ipc_server_with_prio	(	const char *	name,
		enum qb_ipc_type	type,
		struct qb_ipcs_service_handlers *	callbacks,
		enum qb_loop_priority	prio )

Start server-side API end-point, hooked into the internal event loop.

Parameters

[in]	name	name of the IPC end-point ("address" for the client)
[in]	type	selects libqb's IPC back-end (or use #QB_IPC_NATIVE)
[in]	callbacks	defines libqb's IPC service-level handlers
[in]	priority	priority relative to other events handled in the abstract handling loop, use #QB_LOOP_MED when unsure

Returns: libqb's opaque handle to the created service abstraction

Note: For portability concerns, do not use this function if you keep priority as #QB_LOOP_MED, stick with mainloop_add_ipc_server (with exactly such semantics) instead (once you link with this new symbol employed, you can't downgrade the library freely anymore).; The intended effect will only get fully reflected when run-time linked to patched libqb: https://github.com/ClusterLabs/libqb/pull/352

Definition at line 644 of file mainloop.c.

◆ mainloop_add_signal()

gboolean mainloop_add_signal	(	int	sig,
		void(*	dispatch )(int sig) )

Definition at line 353 of file mainloop.c.

◆ mainloop_add_trigger()

crm_trigger_t * mainloop_add_trigger	(	int	priority,
		int(*	dispatch )(gpointer user_data),
		gpointer	userdata )

Create a trigger to be used as a mainloop source.

Parameters

[in]	priority	Relative priority of source (lower number is higher priority)
[in]	dispatch	Trigger dispatch function (should return 0 to remove the trigger from the mainloop, -1 if the trigger should be kept but the job is still running and not complete, and 1 if the trigger should be kept and the job is complete)
[in]	userdata	Pointer to pass to `dispatch`

Returns: Newly allocated mainloop source for trigger

Definition at line 183 of file mainloop.c.

◆ mainloop_child_add()

void mainloop_child_add	(	pid_t	pid,
		int	timeout,
		const char *	desc,
		void *	userdata,
		void(*	callback )(mainloop_child_t *p, pid_t pid, int core, int signo, int exitcode) )

Definition at line 1289 of file mainloop.c.

◆ mainloop_child_add_with_flags()

void mainloop_child_add_with_flags	(	pid_t	pid,
		int	timeout,
		const char *	desc,
		void *	userdata,
		enum	mainloop_child_flags,
		void(*	callback )(mainloop_child_t *p, pid_t pid, int core, int signo, int exitcode) )

Definition at line 1258 of file mainloop.c.

◆ mainloop_child_kill()

gboolean mainloop_child_kill ( pid_t pid )

Definition at line 1202 of file mainloop.c.

◆ mainloop_child_name()

const char * mainloop_child_name ( mainloop_child_t * child )

Definition at line 1028 of file mainloop.c.

◆ mainloop_child_pid()

pid_t mainloop_child_pid ( mainloop_child_t * child )

Definition at line 1022 of file mainloop.c.

◆ mainloop_child_timeout()

int mainloop_child_timeout ( mainloop_child_t * child )

Definition at line 1034 of file mainloop.c.

◆ mainloop_child_userdata()

void * mainloop_child_userdata ( mainloop_child_t * child )

Definition at line 1040 of file mainloop.c.

◆ mainloop_cleanup()

void mainloop_cleanup ( void )

Definition at line 417 of file mainloop.c.

◆ mainloop_clear_child_userdata()

void mainloop_clear_child_userdata ( mainloop_child_t * child )

Definition at line 1046 of file mainloop.c.

◆ mainloop_del_fd()

void mainloop_del_fd ( mainloop_io_t * client )

Definition at line 1006 of file mainloop.c.

◆ mainloop_del_ipc_client()

void mainloop_del_ipc_client ( mainloop_io_t * client )

Definition at line 947 of file mainloop.c.

◆ mainloop_del_ipc_server()

void mainloop_del_ipc_server ( qb_ipcs_service_t * server )

Definition at line 681 of file mainloop.c.

◆ mainloop_destroy_signal()

gboolean mainloop_destroy_signal ( int sig )

Definition at line 397 of file mainloop.c.

◆ mainloop_destroy_trigger()

gboolean mainloop_destroy_trigger ( crm_trigger_t * source )

Definition at line 203 of file mainloop.c.

◆ mainloop_get_ipc_client()

crm_ipc_t * mainloop_get_ipc_client ( mainloop_io_t * client )

Definition at line 953 of file mainloop.c.

◆ mainloop_set_trigger()

void mainloop_set_trigger ( crm_trigger_t * source )

Definition at line 195 of file mainloop.c.

◆ mainloop_timer_add()

mainloop_timer_t * mainloop_timer_add	(	const char *	name,
		guint	period_ms,
		bool	repeat,
		GSourceFunc	cb,
		void *	userdata )

Definition at line 1372 of file mainloop.c.

◆ mainloop_timer_del()

void mainloop_timer_del ( mainloop_timer_t * t )

Definition at line 1391 of file mainloop.c.

◆ mainloop_timer_running()

bool mainloop_timer_running ( mainloop_timer_t * t )

Definition at line 1327 of file mainloop.c.

◆ mainloop_timer_set_period()

guint mainloop_timer_set_period	(	mainloop_timer_t *	t,
		guint	period_ms )

Definition at line 1356 of file mainloop.c.

◆ mainloop_timer_start()

void mainloop_timer_start ( mainloop_timer_t * t )

Definition at line 1336 of file mainloop.c.

◆ mainloop_timer_stop()

void mainloop_timer_stop ( mainloop_timer_t * t )

Definition at line 1346 of file mainloop.c.

◆ mainloop_trigger_complete()

void mainloop_trigger_complete ( crm_trigger_t * trig )

Definition at line 164 of file mainloop.c.

◆ pcmk_drain_main_loop()

void pcmk_drain_main_loop	(	GMainLoop *	mloop,
		guint	timer_ms,
		bool(*	check )(guint) )

Process main loop events while a certain condition is met.

Parameters

[in,out]	mloop	Main loop to process
[in]	timer_ms	Don't process longer than this amount of time
[in]	check	Function that returns true if events should be processed

Note: This function is intended to be called at shutdown if certain important events should not be missed. The caller would likely quit the main loop or exit after calling this function. The check() function will be passed the remaining timeout in milliseconds.

Definition at line 1450 of file mainloop.c.

◆ pcmk_quit_main_loop()

void pcmk_quit_main_loop	(	GMainLoop *	mloop,
		unsigned int	n )

Drain some remaining main loop events then quit it.

Parameters

[in,out]	mloop	Main loop to drain and quit
[in]	n	Drain up to this many pending events

Definition at line 1421 of file mainloop.c.

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ G_PRIORITY_MEDIUM

Typedef Documentation

◆ crm_trigger_t

◆ mainloop_child_t

◆ mainloop_io_t

◆ mainloop_timer_t

◆ sighandler_t

Enumeration Type Documentation

◆ mainloop_child_flags

Function Documentation

◆ crm_signal_handler()

◆ mainloop_add_fd()

◆ mainloop_add_ipc_client()

◆ mainloop_add_ipc_server()

◆ mainloop_add_ipc_server_with_prio()

◆ mainloop_add_signal()

◆ mainloop_add_trigger()

◆ mainloop_child_add()

◆ mainloop_child_add_with_flags()

◆ mainloop_child_kill()

◆ mainloop_child_name()

◆ mainloop_child_pid()

◆ mainloop_child_timeout()

◆ mainloop_child_userdata()

◆ mainloop_cleanup()

◆ mainloop_clear_child_userdata()

◆ mainloop_del_fd()

◆ mainloop_del_ipc_client()

◆ mainloop_del_ipc_server()

◆ mainloop_destroy_signal()

◆ mainloop_destroy_trigger()

◆ mainloop_get_ipc_client()

◆ mainloop_set_trigger()

◆ mainloop_timer_add()

◆ mainloop_timer_del()

◆ mainloop_timer_running()

◆ mainloop_timer_set_period()

◆ mainloop_timer_start()

◆ mainloop_timer_stop()

◆ mainloop_trigger_complete()

◆ pcmk_drain_main_loop()

◆ pcmk_quit_main_loop()