[ovs-dev] [PATCH V3 9/10] cfm: Add cfm_wake_time() function.

Alex Wang alexw at nicira.com
Wed Oct 9 16:31:07 UTC 2013


This commit adds a new function "cfm_wake_time()" that returns the
next wakeup time associated with the "struct cfm".

Signed-off-by: Alex Wang <alexw at nicira.com>
---

v2 -> v3:
- fix the code duplication.

v1 -> v2:
- rebase to master.

---
 lib/cfm.c |   19 +++++++++++++++++--
 lib/cfm.h |    1 +
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/cfm.c b/lib/cfm.c
index e8f86dc..730a00f 100644
--- a/lib/cfm.c
+++ b/lib/cfm.c
@@ -580,12 +580,27 @@ cfm_compose_ccm(struct cfm *cfm, struct ofpbuf *packet,
 void
 cfm_wait(struct cfm *cfm) OVS_EXCLUDED(mutex)
 {
+    poll_timer_wait_until(cfm_wake_time(cfm));
+}
+
+
+/* Returns the next cfm wakeup time. */
+long long int
+cfm_wake_time(struct cfm *cfm) OVS_EXCLUDED(mutex)
+{
+    long long int retval;
+
+    if (!cfm) {
+        return LLONG_MAX;
+    }
+
     ovs_mutex_lock(&mutex);
-    timer_wait(&cfm->tx_timer);
-    timer_wait(&cfm->fault_timer);
+    retval = MIN(cfm->tx_timer.t, cfm->fault_timer.t);
     ovs_mutex_unlock(&mutex);
+    return retval;
 }
 
+
 /* Configures 'cfm' with settings from 's'. */
 bool
 cfm_configure(struct cfm *cfm, const struct cfm_settings *s)
diff --git a/lib/cfm.h b/lib/cfm.h
index cff713f..9d1ea4c 100644
--- a/lib/cfm.h
+++ b/lib/cfm.h
@@ -82,4 +82,5 @@ int cfm_get_opup(const struct cfm *);
 void cfm_get_remote_mpids(const struct cfm *, uint64_t **rmps, size_t *n_rmps);
 const char *cfm_fault_reason_to_str(int fault);
 
+long long int cfm_wake_time(struct cfm*);
 #endif /* cfm.h */
-- 
1.7.9.5




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