X-Git-Url: http://git.pond.sub.org/?p=empserver;a=blobdiff_plain;f=src%2Flib%2Fempthread%2Fio.c;h=b440a4f3e5cbfd0add227d018734f03bf561ee94;hp=f73d89d5dd28db6c8d18e55c1852349321e9829c;hb=ed1cbc97e66405d9bf7639f56fe4f2f98a2961c0;hpb=a96b400da338861e6baa8ef6025b15ff46e924e0

diff --git a/src/lib/empthread/io.c b/src/lib/empthread/io.c
index f73d89d5d..b440a4f3e 100644
--- a/src/lib/empthread/io.c
+++ b/src/lib/empthread/io.c
@@ -124,6 +124,24 @@ io_close(struct iop *iop, struct timeval *timeout)
     free(iop);
 }
 
+void
+io_timeout(struct timeval *timeout, time_t deadline)
+{
+    struct timeval now;
+
+    gettimeofday(&now, NULL);
+    if (now.tv_sec >= deadline) {
+	/* deadline reached already */
+	timeout->tv_sec = 0;
+	timeout->tv_usec = 0;
+    } else {
+	/* deadline in future */
+	timeout->tv_sec = deadline - now.tv_sec - 1;
+	timeout->tv_usec = 999999 - now.tv_usec;
+	/* yes, this is 1usec early; sue me */
+    }
+}
+
 /*
  * Read input from IOP and enqueue it.
  * If TIMEOUT is non-null, wait at most that long for input to arrive.