Prepare Open vSwitch 1.1.2 release.

[sliver-openvswitch.git] / lib / poll-loop.c

diff --git a/lib/poll-loop.c b/lib/poll-loop.c
index 8f65f94..e47cccc 100644 (file)
--- 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. */
@@ -73,6 +76,18 @@ poll_fd_wait(int fd, short int events)
     return new_waiter(fd, events);
 }
 
+/* The caller must ensure that 'msec' is not negative. */
+static void
+poll_timer_wait__(int msec)
+{
+    if (timeout < 0 || msec < timeout) {
+        timeout = msec;
+        if (VLOG_IS_DBG_ENABLED()) {
+            backtrace_capture(&timeout_backtrace);
+        }
+    }
+}
+
 /* Causes the following call to poll_block() to block for no more than 'msec'
  * milliseconds.  If 'msec' is nonpositive, the following call to poll_block()
  * will not block at all.
@@ -81,14 +96,28 @@ poll_fd_wait(int fd, short int events)
  * is affected.  The timer will need to be re-registered after poll_block() is
  * called if it is to persist. */
 void
-poll_timer_wait(int msec)
+poll_timer_wait(long long int msec)
 {
-    if (timeout < 0 || msec < timeout) {
-        timeout = MAX(0, msec);
-        if (VLOG_IS_DBG_ENABLED()) {
-            backtrace_capture(&timeout_backtrace);
-        }
-    }
+    poll_timer_wait__(msec < 0 ? 0
+                      : msec > INT_MAX ? INT_MAX
+                      : 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
@@ -145,7 +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;
@@ -164,7 +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]" : "",