Module: ngircd.git Branch: master Commit: c7dd5ea0baeff589a569cdc7ffd46fc83e885ab2 URL: http://ngircd.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git&a=commit;h=c7dd5ea0b... Author: Florian Westphal <fw@strlen.de> Date: Tue Jan 24 21:57:23 2012 +0100 io: remove outer do {} while loops for epoll/kqueue/devpoll backends simplifies things a bit. io_dispatch() is called repeatedly from the main loop. --- src/ngircd/io.c | 156 ++++++++++++++++++++++++------------------------------- 1 files changed, 68 insertions(+), 88 deletions(-) diff --git a/src/ngircd/io.c b/src/ngircd/io.c index f44dfbf..f061ce0 100644 --- a/src/ngircd/io.c +++ b/src/ngircd/io.c @@ -160,39 +160,34 @@ io_dispatch_devpoll(struct timeval *tv) { struct dvpoll dvp; time_t sec = tv->tv_sec * 1000; - int i, total, ret, timeout = tv->tv_usec + sec; + int i, ret, timeout = tv->tv_usec + sec; short what; struct pollfd p[100]; if (timeout < 0) timeout = 1000; - total = 0; - do { - dvp.dp_timeout = timeout; - dvp.dp_nfds = 100; - dvp.dp_fds = p; - ret = ioctl(io_masterfd, DP_POLL, &dvp); - total += ret; - if (ret <= 0) - return total; - for (i=0; i < ret ; i++) { - what = 0; - if (p[i].revents & (POLLIN|POLLPRI)) - what = IO_WANTREAD; - - if (p[i].revents & POLLOUT) - what |= IO_WANTWRITE; - - if (p[i].revents && !what) { - /* other flag is set, probably POLLERR */ - what = IO_ERROR; - } - io_docallback(p[i].fd, what); + dvp.dp_timeout = timeout; + dvp.dp_nfds = 100; + dvp.dp_fds = p; + ret = ioctl(io_masterfd, DP_POLL, &dvp); + + for (i=0; i < ret ; i++) { + what = 0; + if (p[i].revents & (POLLIN|POLLPRI)) + what = IO_WANTREAD; + + if (p[i].revents & POLLOUT) + what |= IO_WANTWRITE; + + if (p[i].revents && !what) { + /* other flag is set, probably POLLERR */ + what = IO_ERROR; } - } while (ret == 100); + io_docallback(p[i].fd, what); + } - return total; + return ret; } @@ -462,37 +457,30 @@ static int io_dispatch_epoll(struct timeval *tv) { time_t sec = tv->tv_sec * 1000; - int i, total = 0, ret, timeout = tv->tv_usec + sec; + int i, ret, timeout = tv->tv_usec + sec; struct epoll_event epoll_ev[100]; short type; if (timeout < 0) timeout = 1000; - do { - ret = epoll_wait(io_masterfd, epoll_ev, 100, timeout); - total += ret; - if (ret <= 0) - return total; - - for (i = 0; i < ret; i++) { - type = 0; - if (epoll_ev[i].events & (EPOLLERR | EPOLLHUP)) - type = IO_ERROR; + ret = epoll_wait(io_masterfd, epoll_ev, 100, timeout); - if (epoll_ev[i].events & (EPOLLIN | EPOLLPRI)) - type |= IO_WANTREAD; + for (i = 0; i < ret; i++) { + type = 0; + if (epoll_ev[i].events & (EPOLLERR | EPOLLHUP)) + type = IO_ERROR; - if (epoll_ev[i].events & EPOLLOUT) - type |= IO_WANTWRITE; + if (epoll_ev[i].events & (EPOLLIN | EPOLLPRI)) + type |= IO_WANTREAD; - io_docallback(epoll_ev[i].data.fd, type); - } + if (epoll_ev[i].events & EPOLLOUT) + type |= IO_WANTWRITE; - timeout = 0; - } while (ret == 100); + io_docallback(epoll_ev[i].data.fd, type); + } - return total; + return ret; } static void @@ -576,7 +564,7 @@ io_event_change_kqueue(int fd, short what, const int action) static int io_dispatch_kqueue(struct timeval *tv) { - int i, total = 0, ret; + int i, ret; struct kevent kev[100]; struct kevent *newevents; struct timespec ts; @@ -584,50 +572,42 @@ io_dispatch_kqueue(struct timeval *tv) ts.tv_sec = tv->tv_sec; ts.tv_nsec = tv->tv_usec * 1000; - do { - newevents_len = (int) array_length(&io_evcache, sizeof (struct kevent)); - newevents = (newevents_len > 0) ? array_start(&io_evcache) : NULL; - assert(newevents_len >= 0); - - ret = kevent(io_masterfd, newevents, newevents_len, kev, 100, &ts); - if (newevents && ret != -1) - array_trunc(&io_evcache); - - total += ret; - if (ret <= 0) - return total; - - for (i = 0; i < ret; i++) { - io_debug("dispatch_kqueue: fd, kev.flags", (int)kev[i].ident, kev[i].flags); - if (kev[i].flags & (EV_EOF|EV_ERROR)) { - if (kev[i].flags & EV_ERROR) - Log(LOG_ERR, "kevent fd %d: EV_ERROR (%s)", - (int)kev[i].ident, strerror((int)kev[i].data)); - io_docallback((int)kev[i].ident, IO_ERROR); - continue; - } - - switch (kev[i].filter) { - case EVFILT_READ: - io_docallback((int)kev[i].ident, IO_WANTREAD); - break; - case EVFILT_WRITE: - io_docallback((int)kev[i].ident, IO_WANTWRITE); - break; - default: - LogDebug("Unknown kev.filter number %d for fd %d", - kev[i].filter, kev[i].ident); - /* Fall through */ - case EV_ERROR: - io_docallback((int)kev[i].ident, IO_ERROR); - break; - } + newevents_len = (int) array_length(&io_evcache, sizeof (struct kevent)); + newevents = (newevents_len > 0) ? array_start(&io_evcache) : NULL; + assert(newevents_len >= 0); + + ret = kevent(io_masterfd, newevents, newevents_len, kev, 100, &ts); + if (newevents && ret != -1) + array_trunc(&io_evcache); + + for (i = 0; i < ret; i++) { + io_debug("dispatch_kqueue: fd, kev.flags", (int)kev[i].ident, kev[i].flags); + if (kev[i].flags & (EV_EOF|EV_ERROR)) { + if (kev[i].flags & EV_ERROR) + Log(LOG_ERR, "kevent fd %d: EV_ERROR (%s)", + (int)kev[i].ident, strerror((int)kev[i].data)); + io_docallback((int)kev[i].ident, IO_ERROR); + continue; + } + + switch (kev[i].filter) { + case EVFILT_READ: + io_docallback((int)kev[i].ident, IO_WANTREAD); + break; + case EVFILT_WRITE: + io_docallback((int)kev[i].ident, IO_WANTWRITE); + break; + default: + LogDebug("Unknown kev.filter number %d for fd %d", + kev[i].filter, kev[i].ident); + /* Fall through */ + case EV_ERROR: + io_docallback((int)kev[i].ident, IO_ERROR); + break; } - ts.tv_sec = 0; - ts.tv_nsec = 0; - } while (ret == 100); + } - return total; + return ret; } static void