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/*
* Copyright (c) International Business Machines Corp., 2014
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* File: dispatch.c
* Author: Shaun Wetzstein <shaun@us.ibm.com>
* Descr:
* Note:
* Date: 10/03/10
*/
#include <unistd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <malloc.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include "misc.h"
#include "nargs.h"
#include "dispatch.h"
#define DISPATCH_PAGE_SIZE 64
#define DISPATCH_EVENT_SIZE 10
/* ======================================================================= */
const char *__dispatch_msg[] = {
"dispatch: unexpected NULL self pointer",
"dispatch: unexpected NULL callback structure",
};
#define DISPATCH_NULL (__dispatch_msg[0])
#define DISPATCH_CALLBACK_NULL (__dispatch_msg[1])
/* ======================================================================= */
void dispatch_init(dispatch_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(DISPATCH_NULL);
if (self->fd != -1)
close(self->fd), self->fd = -1;
self->fd = epoll_create1(EPOLL_CLOEXEC);
if (unlikely(self->fd == -1))
throw_errno(errno);
array_init(&self->events, sizeof(struct epoll_event),
DISPATCH_PAGE_SIZE);
}
void dispatch_delete(dispatch_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(DISPATCH_NULL);
close(self->fd), self->fd = -1;
array_delete(&self->events);
}
int dispatch_fileno(dispatch_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(DISPATCH_NULL);
return self->fd;
}
int dispatch_add(dispatch_t * self, int fd, uint32_t events,
dispatch_callback_t * cb)
{
if (unlikely(self == NULL))
throw_unexpected(DISPATCH_NULL);
array_status(&self->events, fd, true);
struct epoll_event *ep;
ep = (struct epoll_event *)array_at(&self->events, fd);
ep->events = events;
ep->data.u64 = (uint64_t) fd << 32;
ep->data.ptr = (void *)cb;
if (unlikely(epoll_ctl(self->fd, EPOLL_CTL_ADD, fd, ep)))
throw_errno(errno);
return fd;
}
void dispatch_remove(dispatch_t * self, int fd)
{
if (unlikely(self == NULL))
throw_unexpected(DISPATCH_NULL);
if (unlikely(epoll_ctl(self->fd, EPOLL_CTL_DEL, fd, NULL)))
throw_errno(errno);
array_status(&self->events, fd, false);
}
void dispatch_wait1(dispatch_t * self)
{
dispatch_wait2(self, -1);
}
void dispatch_wait2(dispatch_t * self, int timeout)
{
if (unlikely(self == NULL))
throw_unexpected(DISPATCH_NULL);
if (-1 < self->fd) {
struct epoll_event events[DISPATCH_EVENT_SIZE];
int rc = epoll_wait(self->fd, events,
DISPATCH_EVENT_SIZE, timeout);
if (0 < rc) {
dump_memory(stdout, 0, events, sizeof(events));
}
for (int n = 0; n < rc; n++) {
dispatch_callback_t *cb =
(dispatch_callback_t *) events[n].data.ptr;
if (cb != NULL) {
printf
("cb[%p] fd[%d] data[%p] ep->data.u64[%lld]\n",
cb, cb->fd, cb->data, events[n].data.u64);
if (cb->func != NULL) {
// dispatch_event ev = {events[n].data.u64 >> 32, events[n].events};
dispatch_event_t ev =
{ cb->fd, events[n].events };
cb->func(&ev, cb->data);
}
}
}
}
}
/* ======================================================================= */
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