/* Has directory been update? */
if (sm->shared_header->epoch != sm->current_epoch)
return 0;
- stat_segment_access_start (&sa, sm);
+ if (stat_segment_access_start (&sa, sm))
+ return 0;
ep = vec_elt_at_index (sm->directory_vector, STAT_COUNTER_HEARTBEAT);
if (!stat_segment_access_end (&sa, sm))
return 0.0;
}
}
- stat_segment_access_start (&sa, sm);
+ if (stat_segment_access_start (&sa, sm))
+ return 0;
stat_segment_directory_entry_t *counter_vec = get_stat_vector_r (sm);
for (j = 0; j < vec_len (counter_vec); j++)
if (sm->shared_header->epoch != sm->current_epoch)
return 0;
- stat_segment_access_start (&sa, sm);
+ if (stat_segment_access_start (&sa, sm))
+ return 0;
+
for (i = 0; i < vec_len (stats); i++)
{
/* Collect counter */
stat_segment_data_t *res = 0;
stat_segment_access_t sa;
- stat_segment_access_start (&sa, sm);
+ if (stat_segment_access_start (&sa, sm))
+ return 0;
/* Collect counter */
ep = vec_elt_at_index (sm->directory_vector, index);
/* Has directory been update? */
if (sm->shared_header->epoch != sm->current_epoch)
return 0;
- stat_segment_access_start (&sa, sm);
+ if (stat_segment_access_start (&sa, sm))
+ return 0;
vec = get_stat_vector_r (sm);
ep = vec_elt_at_index (vec, index);
if (!stat_segment_access_end (&sa, sm))
#include <stdint.h>
#include <unistd.h>
#include <vlib/counter_types.h>
+#include <time.h>
#include <stdbool.h>
#include <vpp/stats/stat_segment_shared.h>
stat_segment_shared_header_t *shared_header;
stat_segment_directory_entry_t *directory_vector;
ssize_t memory_size;
+ uint64_t timeout;
} stat_client_main_t;
extern stat_client_main_t stat_client_main;
uint64_t epoch;
} stat_segment_access_t;
-static inline void
+/*
+ * Returns 0 on success, -1 on failure (timeout)
+ */
+static inline uint64_t
+_time_now_nsec (void)
+{
+ struct timespec ts;
+ clock_gettime (CLOCK_REALTIME, &ts);
+ return 1e9 * ts.tv_sec + ts.tv_nsec;
+}
+
+static inline int
stat_segment_access_start (stat_segment_access_t * sa,
stat_client_main_t * sm)
{
stat_segment_shared_header_t *shared_header = sm->shared_header;
+ uint64_t max_time;
+
sa->epoch = shared_header->epoch;
- while (shared_header->in_progress != 0)
- ;
+ if (sm->timeout)
+ {
+ max_time = _time_now_nsec () + sm->timeout;
+ while (shared_header->in_progress != 0 && _time_now_nsec () < max_time)
+ ;
+ }
+ else
+ {
+ while (shared_header->in_progress != 0)
+ ;
+ }
sm->directory_vector = (stat_segment_directory_entry_t *)
stat_segment_pointer (sm->shared_header,
sm->shared_header->directory_offset);
+ if (sm->timeout)
+ return _time_now_nsec () < max_time ? 0 : -1;
+ return 0;
+}
+
+/*
+ * set maximum number of nano seconds to wait for in_progress state
+ */
+static inline void
+stat_segment_set_timeout_nsec (stat_client_main_t * sm, uint64_t timeout)
+{
+ sm->timeout = timeout;
}
static inline bool