eventloop.c File Reference

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include "eventloop.h"

Include dependency graph for eventloop.c:

Classes
struct	CB
struct	TF
struct	WP

Macros
#define	EPOCHDT(tp)   /* ms from epoch to timeval *tp */ (((tp)->tv_usec) / 1000.0 + ((tp)->tv_sec) * 1000.0)

Functions
static void	runWorkProc (void)
static void	callCallback (fd_set *rfdp)
static void	checkTimer ()
static void	oneLoop (void)
static void	deferTO (void *p)
void	eventLoop ()
	Main calls this when ready to hand over control. More...
int	deferLoop (int maxms, int *flagp)
int	deferLoop0 (int maxms, int *flagp)
int	addCallback (int fd, CBF *fp, void *ud)
	Register a new callback, fp, to be called with ud as argument when fd is ready. More...
void	rmCallback (int cid)
	Remove a callback function. More...
int	addTimer (int ms, TCF *fp, void *ud)
	Register a new timer function, fp, to be called with ud as argument after ms. More...
void	rmTimer (int timer_id)
	Remove the timer with the given id, as returned from addTimer(). More...
int	addWorkProc (WPF *fp, void *ud)
	Add a new work procedure, fp, to be called with ud when nothing else to do. More...
void	rmWorkProc (int wid)
	Remove the work procedure with the given id, as returned from addWorkProc(). More...

Variables
static CB *	cback
static int	ncback
static int	ncbinuse
static int	lastcb
static TF *	timef
static int	ntimef
static int	tid
static WP *	wproc
static int	nwproc
static int	nwpinuse
static int	lastwp

Macro Definition Documentation

EPOCHDT

#define EPOCHDT

(

tp

)

/* ms from epoch to timeval *tp */ (((tp)->tv_usec) / 1000.0 + ((tp)->tv_sec) * 1000.0)

Function Documentation

addCallback()

int addCallback	(	int	fd,
		CBF *	fp,
		void *	ud
	)

Register a new callback, fp, to be called with ud as argument when fd is ready.

Parameters

fd	file descriptor.
fp	a pointer to the callback function.
ud	a pointer to be passed to the callback function when called.

Returns

a unique callback id for use with rmCallback().

addTimer()

int addTimer	(	int	ms,
		TCF *	fp,
		void *	ud
	)

Register a new timer function, fp, to be called with ud as argument after ms.

Add to list in order of decreasing time from epoch, ie, last entry runs soonest. The timer will only invoke the callback function once. You need to call addTimer again if you want to repeat the process.

Parameters

ms	timer period in milliseconds.
fp	a pointer to the callback function.
ud	a pointer to be passed to the callback function when called.

Returns

a unique id for use with rmTimer().

addWorkProc()

int addWorkProc	(	WPF *	fp,
		void *	ud
	)

Add a new work procedure, fp, to be called with ud when nothing else to do.

Parameters

fp	a pointer to the work procedure callback function.
ud	a pointer to be passed to the callback function when called.

Returns

a unique id for use with rmWorkProc().

callCallback()

static void callCallback ( fd_set *  rfdp )

static

checkTimer()

static void checkTimer ( )

static

deferLoop()

int deferLoop	(	int	maxms,
		int *	flagp
	)

deferLoop0()

int deferLoop0	(	int	maxms,
		int *	flagp
	)

deferTO()

static void deferTO ( void *  p )

static

eventLoop()

void eventLoop

(

)

Main calls this when ready to hand over control.

oneLoop()

static void oneLoop ( void  )

static

rmCallback()

void rmCallback

(

int

cid

)

Remove a callback function.

Parameters

cid	the callback ID returned from addCallback().

rmTimer()

void rmTimer

(

int

tid

)

Remove the timer with the given id, as returned from addTimer().

Parameters

tid	the timer callback ID returned from addTimer().

rmWorkProc()

void rmWorkProc

(

int

wid

)

Remove the work procedure with the given id, as returned from addWorkProc().

Parameters

wid	the work procedure callback ID returned from addWorkProc().

runWorkProc()

static void runWorkProc ( void  )

static

Variable Documentation

cback

CB* cback

static

lastcb

int lastcb

static

lastwp

int lastwp

static

ncback

int ncback

static

ncbinuse

int ncbinuse

static

ntimef

int ntimef

static

nwpinuse

int nwpinuse

static

nwproc

int nwproc

static

tid

int tid

static

timef

TF* timef

static

wproc

WP* wproc

static