New files

Rev: src/jpoll.c:1.1
Rev: src/jpoll.h:1.1

src/jpoll.c

+/*
+ * AUTHOR:     Sean Reifschneider <jafo@tummy.com>
+ * DATE:       1998-10-10
+ * Copyright (c) 1998 Sean Reifschneider
+ *
+ * This code emulates a minimal poll() function, and can be used as a drop-in
+ * replacement for the SVID3 implementation.  Note that at this time it only
+ * emulates the POLLIN and POLLOUT events.
+ */
+
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "jpoll.h"
+
+
+int poll(struct pollfd *fdlist, nfds_t count, int timeoutInMS)
+{
+struct timeval timeout, *to;
+fd_set readfdset, writefdset;
+nfds_t i;
+int ret, fdcount = 0;
+int tsize = getdtablesize();
+
+
+if (timeoutInMS < 0)
+	to = NULL;
+else {
+	to = &timeout;
+	timeout.tv_sec = timeoutInMS / 1000;
+	timeout.tv_usec = (timeoutInMS % 1000) * 1000;
+	}
+
+FD_ZERO(&readfdset);
+FD_ZERO(&writefdset);
+for (i = 0; i < count; i++) {
+	if (fdlist[i].fd < 0) continue;
+	if (fdlist[i].events & POLLIN) FD_SET(fdlist[i].fd, &readfdset);
+	if (fdlist[i].events & POLLOUT) FD_SET(fdlist[i].fd, &writefdset);
+	fdcount++;
+	}
+
+/*  spec says that if all FDs are negative, then *ONLY* return zero  */
+if (fdcount == 0)
+	return(0);
+
+/*  clear all events  */
+for (i = 0; i < count; i++) fdlist[i].revents = 0;
+
+if ((ret = select(tsize, &readfdset, &writefdset, NULL, &timeout)) == -1)
+	return(-1);
+
+for (i = 0; i < count; i++) {
+	if (FD_ISSET(fdlist[i].fd, &readfdset)) fdlist[i].revents |= POLLIN;
+	if (FD_ISSET(fdlist[i].fd, &writefdset)) fdlist[i].revents |= POLLOUT;
+	printf("Set FD %d = %d\n", fdlist[i].revents);
+	}
+printf("Returning %d\n", ret);
+return(ret);
+}

src/jpoll.h

+/*
+ * AUTHOR:     Sean Reifschneider <jafo@tummy.com>
+ * DATE:       1998-10-10
+ * Copyright (c) 1998 Sean Reifschneider
+ *
+ * Header file for my poll() SVID3 emulation function.
+ */
+
+#ifndef JPOLL_H_INCLUDED
+#define JPOLL_H_INCLUDED
+
+#define POLLIN		0x0001		/*  check for input  */
+#define POLLOUT	0x0004		/*  check for output  */
+
+struct pollfd {
+	int fd;				/*  file descriptor to poll  */
+	short events;		/*  events we are interested in  */
+	short revents;		/*  events that occured  */
+	};
+
+typedef unsigned int nfds_t;
+
+int poll(struct pollfd *fdlist, nfds_t count, int timeoutInMS);
+
+#endif