uloop-kqueue.c File Reference

Go to the source code of this file.

Functions
static int	uloop_init_pollfd (void)
static uint16_t	get_flags (unsigned int flags, unsigned int mask)
static int	register_kevent (struct uloop_fd *fd, unsigned int flags)
static int	register_poll (struct uloop_fd *fd, unsigned int flags)
static int	__uloop_fd_delete (struct uloop_fd *fd)
static int64_t	get_timestamp_us (void)
static int	uloop_fetch_events (int timeout)
static int	timer_register (struct uloop_interval *tm, unsigned int msecs)
static int	timer_remove (struct uloop_interval *tm)
static int64_t	timer_next (struct uloop_interval *tm)

Variables
static struct kevent	events [ULOOP_MAX_EVENTS]

Function Documentation

__uloop_fd_delete()

static int __uloop_fd_delete ( struct uloop_fd *  fd )

static

Definition at line 101 of file uloop-kqueue.c.

{
        return register_poll(fd, 0);
}

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get_flags()

static uint16_t get_flags ( unsigned int  flags, unsigned int  mask  )

static

Definition at line 37 of file uloop-kqueue.c.

{
        uint16_t kflags = 0;
 
        if (!(flags & mask))
                return EV_DELETE;
 
        kflags = EV_ADD;
        if (flags & ULOOP_EDGE_TRIGGER)
                kflags |= EV_CLEAR;
 
        return kflags;
}

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get_timestamp_us()

static int64_t get_timestamp_us ( void  )

static

Definition at line 106 of file uloop-kqueue.c.

{
#ifdef CLOCK_MONOTONIC
        struct timespec ts = { 0, 0 };
 
        clock_gettime(CLOCK_MONOTONIC, &ts);
 
        return ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
#else
        struct timeval tv = { 0, 0 };
 
        gettimeofday(&tv, NULL);
 
        return tv.tv_sec * 1000000 + tv.tv_usec;
#endif
}

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register_kevent()

static int register_kevent ( struct uloop_fd *  fd, unsigned int  flags  )

static

Definition at line 53 of file uloop-kqueue.c.

{
        struct timespec timeout = { 0, 0 };
        struct kevent ev[2];
        int nev = 0;
        unsigned int fl = 0;
        unsigned int changed;
        uint16_t kflags;
 
        if (flags & ULOOP_EDGE_DEFER)
                flags &= ~ULOOP_EDGE_TRIGGER;
 
        changed = flags ^ fd->flags;
        if (changed & ULOOP_EDGE_TRIGGER)
                changed |= flags;
 
        if (!changed)
                return 0;
 
        if (changed & ULOOP_READ) {
                kflags = get_flags(flags, ULOOP_READ);
                EV_SET(&ev[nev++], fd->fd, EVFILT_READ, kflags, 0, 0, fd);
        }
 
        if (changed & ULOOP_WRITE) {
                kflags = get_flags(flags, ULOOP_WRITE);
                EV_SET(&ev[nev++], fd->fd, EVFILT_WRITE, kflags, 0, 0, fd);
        }
 
        if (!flags)
                fl |= EV_DELETE;
 
        if (kevent(poll_fd, ev, nev, NULL, fl, &timeout) == -1)
                return -1;
 
        return 0;
}

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register_poll()

static int register_poll ( struct uloop_fd *  fd, unsigned int  flags  )

static

Definition at line 91 of file uloop-kqueue.c.

{
        if (flags & ULOOP_EDGE_TRIGGER)
                flags |= ULOOP_EDGE_DEFER;
        else
                flags &= ~ULOOP_EDGE_DEFER;
 
        return register_kevent(fd, flags);
}

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timer_next()

static int64_t timer_next ( struct uloop_interval *  tm )

static

Definition at line 200 of file uloop-kqueue.c.

{
        int64_t t1 = tm->priv.time.fired;
        int64_t t2 = get_timestamp_us();
 
        while (t1 < t2)
                t1 += tm->priv.time.msecs * 1000;
 
        return (t1 - t2) / 1000;
}

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timer_register()

static int timer_register ( struct uloop_interval *  tm, unsigned int  msecs  )

static

Definition at line 179 of file uloop-kqueue.c.

{
        struct kevent ev;
 
        tm->priv.time.msecs = msecs;
        tm->priv.time.fired = get_timestamp_us();
 
        EV_SET(&ev, (uintptr_t)tm, EVFILT_TIMER, EV_ADD, NOTE_USECONDS, msecs * 1000, tm);
 
        return kevent(poll_fd, &ev, 1, NULL, 0, NULL);
}

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timer_remove()

static int timer_remove ( struct uloop_interval *  tm )

static

Definition at line 191 of file uloop-kqueue.c.

{
        struct kevent ev;
 
        EV_SET(&ev, (uintptr_t)tm, EVFILT_TIMER, EV_DELETE, 0, 0, NULL);
 
        return kevent(poll_fd, &ev, 1, NULL, 0, NULL);
}

uloop_fetch_events()

static int uloop_fetch_events ( int  timeout )

static

Definition at line 123 of file uloop-kqueue.c.

{
        struct timespec ts;
        int nfds, n;
 
        if (timeout >= 0) {
                ts.tv_sec = timeout / 1000;
                ts.tv_nsec = (timeout % 1000) * 1000000;
        }
 
        nfds = kevent(poll_fd, NULL, 0, events, ARRAY_SIZE(events), timeout >= 0 ? &ts : NULL);
        for (n = 0; n < nfds; n++) {
                if (events[n].filter == EVFILT_TIMER) {
                        struct uloop_interval *tm = events[n].udata;
 
                        tm->priv.time.fired = get_timestamp_us();
                        tm->expirations += events[n].data;
                        tm->cb(tm);
 
                        continue;
                }
 
                struct uloop_fd_event *cur = &cur_fds[n];
                struct uloop_fd *u = events[n].udata;
                unsigned int ev = 0;
 
                cur->fd = u;
                if (!u)
                        continue;
 
                if (events[n].flags & EV_ERROR) {
                        u->error = true;
                        if (!(u->flags & ULOOP_ERROR_CB))
                                uloop_fd_delete(u);
                }
 
                if(events[n].filter == EVFILT_READ)
                        ev |= ULOOP_READ;
                else if (events[n].filter == EVFILT_WRITE)
                        ev |= ULOOP_WRITE;
 
                if (events[n].flags & EV_EOF)
                        u->eof = true;
                else if (!ev)
                        cur->fd = NULL;
 
                cur->events = ev;
                if (u->flags & ULOOP_EDGE_DEFER) {
                        u->flags &= ~ULOOP_EDGE_DEFER;
                        u->flags |= ULOOP_EDGE_TRIGGER;
                        register_kevent(u, u->flags);
                }
        }
        return nfds;
}

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uloop_init_pollfd()

static int uloop_init_pollfd ( void  )

static

Definition at line 18 of file uloop-kqueue.c.

{
        struct timespec timeout = { 0, 0 };
        struct kevent ev = {};
 
        if (poll_fd >= 0)
                return 0;
 
        poll_fd = kqueue();
        if (poll_fd < 0)
                return -1;
 
        EV_SET(&ev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, 0);
        kevent(poll_fd, &ev, 1, NULL, 0, &timeout);
 
        return 0;
}

Variable Documentation

events

struct kevent events[ULOOP_MAX_EVENTS]

static

Definition at line 37 of file uloop-kqueue.c.