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/*
* Ivy, C interface
*
* Copyright (C) 1997-2000
* Centre d'Études de la Navigation Aérienne
*
* Main loop based on select
*
* Authors: François-Régis Colin <fcolin@cena.dgac.fr>
* Stéphane Chatty <chatty@cena.dgac.fr>
*
* $Id$
*
* Please refer to file version.h for the
* copyright notice regarding this software
*/
#ifdef WIN32
#include <windows.h>
#endif
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#ifndef WIN32
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <signal.h>
#endif
#include "list.h"
#include "ivychannel.h"
#include "ivyloop.h"
#include "timer.h"
struct _channel {
Channel next;
HANDLE fd;
void *data;
int tobedeleted;
ChannelHandleDelete handle_delete;
ChannelHandleRead handle_read;
};
ChannelInit channel_init = IvyChannelInit;
ChannelSetUp channel_setup = IvyChannelSetUp;
ChannelClose channel_close = IvyChannelClose;
static Channel channels_list = NULL;
static int channel_initialized = 0;
static fd_set open_fds;
static int MainLoop = 1;
#ifdef WIN32
WSADATA WsaData;
#endif
void
IvyChannelClose (Channel channel)
{
channel->tobedeleted = 1;
}
static void
IvyChannelDelete (Channel channel)
{
if (channel->handle_delete)
(*channel->handle_delete) (channel->data);
FD_CLR (channel->fd, &open_fds);
IVY_LIST_REMOVE (channels_list, channel);
}
static void
ChannelDefferedDelete ()
{
Channel channel, next;
IVY_LIST_EACH_SAFE (channels_list, channel,next) {
if (channel->tobedeleted ) {
IvyChannelDelete (channel);
}
}
}
Channel IvyChannelSetUp (HANDLE fd, void *data,
ChannelHandleDelete handle_delete,
ChannelHandleRead handle_read
)
{
Channel channel;
IVY_LIST_ADD (channels_list, channel);
if (!channel) {
fprintf(stderr,"NOK Memory Alloc Error\n");
exit(0);
}
channel->fd = fd;
channel->tobedeleted = 0;
channel->handle_delete = handle_delete;
channel->handle_read = handle_read;
channel->data = data;
FD_SET (channel->fd, &open_fds);
return channel;
}
static void
IvyChannelHandleRead (fd_set *current)
{
Channel channel, next;
IVY_LIST_EACH_SAFE (channels_list, channel, next) {
if (FD_ISSET (channel->fd, current)) {
(*channel->handle_read)(channel,channel->fd,channel->data);
}
}
}
static void
IvyChannelHandleExcpt (fd_set *current)
{
Channel channel,next;
IVY_LIST_EACH_SAFE (channels_list, channel, next) {
if (FD_ISSET (channel->fd, current)) {
if (channel->handle_delete)
(*channel->handle_delete)(channel->data);
/* IvyChannelClose (channel); */
}
}
}
void IvyChannelInit (void)
{
#ifdef WIN32
int error;
#else
/* pour eviter les plantages quand les autres applis font core-dump */
signal (SIGPIPE, SIG_IGN);
#endif
if (channel_initialized) return;
FD_ZERO (&open_fds);
#ifdef WIN32
error = WSAStartup (0x0101, &WsaData);
if (error == SOCKET_ERROR) {
printf ("WSAStartup failed.\n");
}
#endif
channel_initialized = 1;
}
void IvyStop (void)
{
MainLoop = 0;
}
void IvyMainLoop(void(*hook)(void))
{
fd_set rdset;
fd_set exset;
int ready;
while (MainLoop) {
ChannelDefferedDelete();
if (hook) (*hook)();
rdset = open_fds;
exset = open_fds;
ready = select(64, &rdset, 0, &exset, TimerGetSmallestTimeout());
if (ready < 0 && (errno != EINTR)) {
fprintf (stderr, "select error %d\n",errno);
perror("select");
return;
}
TimerScan();
if (ready > 0) {
IvyChannelHandleExcpt(&exset);
IvyChannelHandleRead(&rdset);
continue;
}
}
}
void IvyIdle()
{
fd_set rdset;
fd_set exset;
int ready;
struct timeval timeout = {0,0};
ChannelDefferedDelete();
rdset = open_fds;
exset = open_fds;
ready = select(64, &rdset, 0, &exset, &timeout);
if (ready < 0 && (errno != EINTR)) {
fprintf (stderr, "select error %d\n",errno);
perror("select");
return;
}
if (ready > 0) {
IvyChannelHandleExcpt(&exset);
IvyChannelHandleRead(&rdset);
}
}
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