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//
// PLP - An implementation of the PSION link protocol
//
// Copyright (C) 1999 Philip Proudman
//
// 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
//
// e-mail philip.proudman@btinternet.com
#include <unistd.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <stream.h>
#include <memory.h>
#include "iowatch.h"
IOWatch::IOWatch() {
num = 0;
io = new int [FD_SETSIZE];
}
IOWatch::~IOWatch() {
delete [] io;
}
void IOWatch::addIO(const int fd) {
int pos;
for (pos = 0; pos < num && fd < io[pos]; pos++);
if (io[pos] == fd)
return;
for (int i = num; i > pos; i--)
io[i] = io[i-1];
io[pos] = fd;
num++;
}
void IOWatch::remIO(const int fd) {
int pos;
for (pos = 0; pos < num && fd != io[pos]; pos++);
if (pos != num) {
num--;
for (int i = pos; i <num; i++) io[i] = io[i+1];
}
}
bool IOWatch::watch(const long secs, const long usecs) {
if (num > 0) {
fd_set iop;
FD_ZERO(&iop);
for (int i = 0; i < num; i++)
FD_SET(io[i], &iop);
struct timeval t;
t.tv_usec = usecs;
t.tv_sec = secs;
return (select(io[0]+1, &iop, NULL, NULL, &t) > 0);
}
sleep(secs);
usleep(usecs);
return false;
}
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