X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fpoll-loop.c;h=e47cccc392763f53c3e68ecfd987ca8894e99d1b;hb=cb034511802ff7516ca2a94da1e161965fb80ad0;hp=29931f7855ae53f0d4e2651443a6dba9b382ab01;hpb=8bf4bbe390af3f370e7e95d9237572ff750047a8;p=openvswitch

diff --git a/lib/poll-loop.c b/lib/poll-loop.c
index 29931f78..e47cccc3 100644
--- a/lib/poll-loop.c
+++ b/lib/poll-loop.c
@@ -28,10 +28,13 @@
 #include "fatal-signal.h"
 #include "list.h"
 #include "timeval.h"
-
-#define THIS_MODULE VLM_poll_loop
 #include "vlog.h"
 
+VLOG_DEFINE_THIS_MODULE(poll_loop);
+
+COVERAGE_DEFINE(poll_fd_wait);
+COVERAGE_DEFINE(poll_zero_timeout);
+
 /* An event that will wake the following call to poll_block(). */
 struct poll_waiter {
     /* Set when the waiter is created. */
@@ -100,6 +103,23 @@ poll_timer_wait(long long int msec)
                       : msec);
 }
 
+/* Causes the following call to poll_block() to wake up when the current time,
+ * as returned by time_msec(), reaches 'msec' or later.  If 'msec' is earlier
+ * than the current time, the following call to poll_block() will not block at
+ * all.
+ *
+ * The timer registration is one-shot: only the following call to poll_block()
+ * is affected.  The timer will need to be re-registered after poll_block() is
+ * called if it is to persist. */
+void
+poll_timer_wait_until(long long int msec)
+{
+    long long int now = time_msec();
+    poll_timer_wait__(msec <= now ? 0
+                      : msec < now + INT_MAX ? msec - now
+                      : INT_MAX);
+}
+
 /* Causes the following call to poll_block() to wake up immediately, without
  * blocking. */
 void
@@ -154,7 +174,7 @@ poll_block(void)
     }
 
     n_pollfds = 0;
-    LIST_FOR_EACH (pw, struct poll_waiter, node, &waiters) {
+    LIST_FOR_EACH (pw, node, &waiters) {
         pw->pollfd = &pollfds[n_pollfds];
         pollfds[n_pollfds].fd = pw->fd;
         pollfds[n_pollfds].events = pw->events;
@@ -173,7 +193,7 @@ poll_block(void)
         log_wakeup(&timeout_backtrace, "%d-ms timeout", timeout);
     }
 
-    LIST_FOR_EACH_SAFE (pw, next, struct poll_waiter, node, &waiters) {
+    LIST_FOR_EACH_SAFE (pw, next, node, &waiters) {
         if (pw->pollfd->revents && VLOG_IS_DBG_ENABLED()) {
             log_wakeup(pw->backtrace, "%s%s%s%s%s on fd %d",
                        pw->pollfd->revents & POLLIN ? "[POLLIN]" : "",