From 34b70b0b46e34a73308a4034cc9b1c70209b9eb4 Mon Sep 17 00:00:00 2001
From: Fritz Elfert <felfert@to.com>
Date: Mon, 28 Jun 1999 08:56:01 +0000
Subject: First import.

---
 lib/iowatch.cc | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 lib/iowatch.cc

(limited to 'lib/iowatch.cc')

diff --git a/lib/iowatch.cc b/lib/iowatch.cc
new file mode 100644
index 0000000..15e8ecf
--- /dev/null
+++ b/lib/iowatch.cc
@@ -0,0 +1,77 @@
+//
+//  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 "bool.h"
+#include "iowatch.h"
+
+IOWatch::IOWatch() {
+  num = 0;
+  io = new int [MAX_IO];
+}
+
+IOWatch::~IOWatch() {
+  delete [] io;
+}
+
+void IOWatch::addIO(int a) {
+  int pos;
+  for (pos = 0; pos < num && a < io[pos]; pos++);
+  for (int i = num; i > pos; i--) io[i] = io[i-1];
+  io[pos] = a;
+  num++;
+}
+
+void IOWatch::remIO(int a) {
+  int pos;
+  for (pos = 0; pos < num && a != io[pos]; pos++);
+  if (pos != num) {
+    num--;
+    for (int i = pos; i <num; i++) io[i] = io[i+1];
+  }
+}
+
+bool IOWatch::watch(long secs, 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);
+  }
+  else {
+    sleep(secs);
+    usleep(usecs);
+  }
+  return false;
+}
+
+
-- 
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