This commit adds an extern sequence number 'timewarp_seq' in timeval,
so that threads other than main thread can wait on this sequence number
and be waken up when time is warped.
Signed-off-by: Alex Wang <al...@nicira.com>
---
lib/timeval.c | 8 ++++++++
lib/timeval.h | 3 +++
2 files changed, 11 insertions(+)
diff --git a/lib/timeval.c b/lib/timeval.c
index 223ed30..07b3e05 100644
--- a/lib/timeval.c
+++ b/lib/timeval.c
@@ -33,6 +33,7 @@
#include "hmap.h"
#include "ovs-thread.h"
#include "signals.h"
+#include "seq.h"
#include "unixctl.h"
#include "util.h"
#include "vlog.h"
@@ -57,6 +58,10 @@ static struct clock wall_clock; /* CLOCK_REALTIME. */
/* The monotonic time at which the time module was initialized. */
static long long int boot_time;
+/* Reference to the seq struct. Threads other than main thread can
+ * wait on timewarp_seq and be wakenup when time is warped. */
+struct seq *timewarp_seq;
+
/* Monotonic time in milliseconds at which to die with SIGALRM (if not
* LLONG_MAX). */
static long long int deadline = LLONG_MAX;
@@ -79,6 +84,7 @@ init_clock(struct clock *c, clockid_t id)
ovs_mutex_init(&c->mutex);
atomic_init(&c->slow_path, false);
xclock_gettime(c->id, &c->cache);
+ timewarp_seq = seq_create();
}
static void
@@ -509,6 +515,8 @@ timeval_warp_cb(struct unixctl_conn *conn,
ovs_mutex_lock(&monotonic_clock.mutex);
atomic_store(&monotonic_clock.slow_path, true);
timespec_add(&monotonic_clock.warp, &monotonic_clock.warp, &ts);
+ /* Changes 'timewarp_seq' to wakeup all waiting thread. */
+ seq_change(timewarp_seq);
ovs_mutex_unlock(&monotonic_clock.mutex);
unixctl_command_reply(conn, "warped");
diff --git a/lib/timeval.h b/lib/timeval.h
index 99b3af0..9f8e917 100644
--- a/lib/timeval.h
+++ b/lib/timeval.h
@@ -27,6 +27,7 @@ extern "C" {
struct ds;
struct pollfd;
+struct seq;
struct timespec;
struct timeval;
@@ -45,6 +46,8 @@ struct tm_msec {
int msec;
};
+extern struct seq *timewarp_seq;
+
time_t time_now(void);
time_t time_wall(void);
long long int time_msec(void);
--
1.7.9.5
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