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/*
* libmowgli: A collection of useful routines for programming.
* mowgli_ioevent.c: Portable I/O event layer.
*
* Copyright (c) 2007 William Pitcock <nenolod -at- sacredspiral.co.uk>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "mowgli.h"
#ifdef HAVE_EPOLL_CTL
# include <sys/epoll.h>
#endif
#ifdef HAVE_PORT_CREATE
# include <port.h>
#endif
mowgli_ioevent_handle_t *mowgli_ioevent_create(void)
{
mowgli_ioevent_handle_t *self = mowgli_alloc(sizeof(mowgli_ioevent_handle_t));
#ifdef HAVE_EPOLL_CTL
self->impldata = epoll_create(FD_SETSIZE);
#endif
#ifdef HAVE_PORT_CREATE
self->impldata = port_create();
#endif
return self;
}
void mowgli_ioevent_destroy(mowgli_ioevent_handle_t *self)
{
return_if_fail(self != NULL);
#if defined(HAVE_EPOLL_CTL) || defined(HAVE_PORT_CREATE)
close(self->impldata);
#endif
mowgli_free(self);
}
int mowgli_ioevent_get(mowgli_ioevent_handle_t *self, mowgli_ioevent_t *buf, size_t bufsize, unsigned int delay)
{
#if defined HAVE_EPOLL_CTL || defined HAVE_PORT_CREATE
int ret, iter;
#else
int ret = -1;
#endif
#ifdef HAVE_EPOLL_CTL
struct epoll_event events[bufsize];
ret = epoll_wait(self->impldata, events, bufsize, delay);
if (ret == -1)
return ret;
for (iter = 0; iter < ret; iter++)
{
buf[iter].ev_status = 0;
buf[iter].ev_object = events[iter].data.fd;
buf[iter].ev_opaque = events[iter].data.ptr;
buf[iter].ev_source = MOWGLI_SOURCE_FD;
if (events[iter].events & EPOLLIN)
buf[iter].ev_status |= MOWGLI_POLLRDNORM;
if (events[iter].events & EPOLLOUT)
buf[iter].ev_status |= MOWGLI_POLLWRNORM;
if (events[iter].events & EPOLLHUP)
buf[iter].ev_status = MOWGLI_POLLHUP;
if (events[iter].events & EPOLLERR)
buf[iter].ev_status = MOWGLI_POLLERR;
}
#endif
#ifdef HAVE_PORT_CREATE
port_event_t events[bufsize];
unsigned int nget = 1;
struct timespec poll_time;
poll_time.tv_sec = delay / 1000;
poll_time.tv_nsec = (delay % 1000) * 1000000;
ret = port_getn(self->impldata, events, bufsize, &nget, &poll_time);
if (ret == -1)
return ret;
for (iter = 0; iter < nget; iter++)
{
buf[iter].ev_status = 0;
buf[iter].ev_object = events[iter].portev_object;
buf[iter].ev_opaque = events[iter].portev_user;
buf[iter].ev_source = MOWGLI_SOURCE_FD;
if (events[iter].portev_events & POLLRDNORM)
buf[iter].ev_status |= MOWGLI_POLLRDNORM;
if (events[iter].portev_events & POLLWRNORM)
buf[iter].ev_status |= MOWGLI_POLLWRNORM;
if (events[iter].portev_events & POLLHUP)
buf[iter].ev_status = MOWGLI_POLLHUP;
if (events[iter].portev_events & POLLERR)
buf[iter].ev_status = MOWGLI_POLLERR;
}
ret = nget;
#endif
return ret;
}
void mowgli_ioevent_associate(mowgli_ioevent_handle_t *self, mowgli_ioevent_source_t source, int object, unsigned int flags, void *opaque)
{
#if defined HAVE_EPOLL_CTL || defined HAVE_PORT_CREATE
int events = 0;
#endif
if (source != MOWGLI_SOURCE_FD)
return;
#ifdef HAVE_EPOLL_CTL
{
struct epoll_event ep_event = {};
events = EPOLLONESHOT;
if (flags & MOWGLI_POLLRDNORM)
events |= EPOLLIN;
if (flags & MOWGLI_POLLWRNORM)
events |= EPOLLOUT;
ep_event.events = events;
ep_event.data.ptr = opaque;
epoll_ctl(self->impldata, EPOLL_CTL_ADD, object, &ep_event);
}
#endif
#ifdef HAVE_PORT_CREATE
#ifdef POLLRDNORM
if (flags & MOWGLI_POLLRDNORM)
events |= POLLRDNORM;
#endif
#ifdef EPOLLWRNORM
if (flags & MOWGLI_POLLWRNORM)
events |= EPOLLWRNORM;
#endif
port_associate(self->impldata, PORT_SOURCE_FD, object, events, opaque);
#endif
}
void mowgli_ioevent_dissociate(mowgli_ioevent_handle_t *self, mowgli_ioevent_source_t source, int object)
{
if (source != MOWGLI_SOURCE_FD)
return;
#ifdef HAVE_EPOLL_CTL
{
struct epoll_event ep_event = {};
epoll_ctl(self->impldata, EPOLL_CTL_DEL, object, &ep_event);
}
#endif
#ifdef HAVE_PORT_CREATE
port_dissociate(self->impldata, PORT_SOURCE_FD, object);
#endif
}
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