void grpc_fd_shutdown(grpc_fd *fd) {
size_t ncb = 0;
gpr_mu_lock(&fd->set_state_mu);
GPR_ASSERT(!gpr_atm_no_barrier_load(&fd->shutdown));
gpr_atm_rel_store(&fd->shutdown, 1);
set_ready_locked(&fd->readst, &fd->shutdown_closures[0], &ncb);
set_ready_locked(&fd->writest, &fd->shutdown_closures[0], &ncb);
gpr_mu_unlock(&fd->set_state_mu);
GPR_ASSERT(ncb <= 2);
process_callbacks(fd->shutdown_closures[0], ncb, 0 /* GPR_FALSE */,
0 /* GPR_FALSE */);
}
struct bt_ctf_event *bt_ctf_iter_read_event_flags(struct bt_ctf_iter *iter,
int *flags)
{
struct ctf_file_stream *file_stream;
struct bt_ctf_event *ret;
struct ctf_stream_definition *stream;
struct packet_index *packet_index;
/*
* We do not want to fail for any other reason than end of
* trace, hence the assert.
*/
assert(iter);
ret = &iter->current_ctf_event;
file_stream = bt_heap_maximum(iter->parent.stream_heap);
if (!file_stream) {
/* end of file for all streams */
goto stop;
}
stream = &file_stream->parent;
ret->parent = g_ptr_array_index(stream->events_by_id,
stream->event_id);
if (flags)
*flags = 0;
if (!file_stream->pos.packet_cycles_index)
packet_index = NULL;
else
packet_index = &g_array_index(file_stream->pos.packet_cycles_index,
struct packet_index, file_stream->pos.cur_index);
iter->events_lost = 0;
if (packet_index && packet_index->events_discarded >
file_stream->pos.last_events_discarded) {
if (flags)
*flags |= BT_ITER_FLAG_LOST_EVENTS;
iter->events_lost += packet_index->events_discarded -
file_stream->pos.last_events_discarded;
file_stream->pos.last_events_discarded =
packet_index->events_discarded;
}
if (ret->parent->stream->stream_id > iter->callbacks->len)
goto end;
process_callbacks(iter, ret->parent->stream);
end:
return ret;
stop:
return NULL;
}
/*
* Callback routine when the required locks are obtained.
* Called from parent context
*/
static void ctdb_lock_handler(struct tevent_context *ev,
struct tevent_fd *tfd,
uint16_t flags,
void *private_data)
{
struct lock_context *lock_ctx;
char c;
bool locked;
double t;
int id;
lock_ctx = talloc_get_type_abort(private_data, struct lock_context);
/* cancel the timeout event */
TALLOC_FREE(lock_ctx->ttimer);
t = timeval_elapsed(&lock_ctx->start_time);
id = lock_bucket_id(t);
/* Read the status from the child process */
if (sys_read(lock_ctx->fd[0], &c, 1) != 1) {
locked = false;
} else {
locked = (c == 0 ? true : false);
}
/* Update statistics */
CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.num_calls);
if (lock_ctx->ctdb_db) {
CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_calls);
}
if (locked) {
if (lock_ctx->ctdb_db) {
CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.buckets[id]);
CTDB_UPDATE_LATENCY(lock_ctx->ctdb, lock_ctx->ctdb_db,
lock_type_str[lock_ctx->type], locks.latency,
lock_ctx->start_time);
CTDB_UPDATE_DB_LATENCY(lock_ctx->ctdb_db, lock_type_str[lock_ctx->type], locks.latency, t);
CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.buckets[id]);
}
} else {
CTDB_INCREMENT_STAT(lock_ctx->ctdb, locks.num_failed);
if (lock_ctx->ctdb_db) {
CTDB_INCREMENT_DB_STAT(lock_ctx->ctdb_db, locks.num_failed);
}
}
process_callbacks(lock_ctx, locked);
}
/*
* Informs other threads that this thread has passed through a quiescent
* state.
* If all threads have passed through a quiescent state since the last time
* this thread processed it's callbacks, proceed to process pending callbacks.
*/
void quiescent_state (int blocking)
{
uint8_t my_index = ltd.thread_index;
int epoch;
int orig;
retry:
epoch = qg->global_epoch;
if (shtd[my_index].epoch != epoch) { /* New epoch. */
/* Process callbacks for old 'incarnation' of this epoch. */
process_callbacks(ltd.limbo_list[epoch]);
shtd[my_index].epoch = epoch;
} else {
orig = shtd[my_index].in_critical;
shtd[my_index].in_critical = 0;
int res = update_epoch();
if (res) {
shtd[my_index].in_critical = orig;
MEM_BARRIER;
epoch = qg->global_epoch;
if (shtd[my_index].epoch != epoch) {
process_callbacks(ltd.limbo_list[epoch]);
shtd[my_index].epoch = epoch;
}
return;
} else if (blocking) {
shtd[my_index].in_critical = orig;
MEM_BARRIER;
sched_yield();
goto retry;
}
shtd[my_index].in_critical = orig;
MEM_BARRIER;
}
return;
}
static void set_ready(grpc_fd *fd, gpr_atm *st,
int allow_synchronous_callback) {
/* only one set_ready can be active at once (but there may be a racing
notify_on) */
int success;
grpc_iomgr_closure* closure;
size_t ncb = 0;
gpr_mu_lock(&fd->set_state_mu);
set_ready_locked(st, &closure, &ncb);
gpr_mu_unlock(&fd->set_state_mu);
success = !gpr_atm_acq_load(&fd->shutdown);
GPR_ASSERT(ncb <= 1);
if (ncb > 0) {
process_callbacks(closure, ncb, success, allow_synchronous_callback);
}
}
void mastermind_t::data::collect_info_loop() {
std::unique_lock<std::mutex> lock(m_mutex);
if (m_done) {
COCAINE_LOG_INFO(m_logger, "libmastermind: have to stop immediately");
return;
}
try {
reconnect();
} catch (const std::exception &ex) {
COCAINE_LOG_ERROR(m_logger, "libmastermind: reconnect: %s", ex.what());
}
#if __GNUC_MINOR__ >= 6
auto no_timeout = std::cv_status::no_timeout;
auto timeout = std::cv_status::timeout;
auto tm = timeout;
#else
bool no_timeout = true;
bool timeout = false;
bool tm = timeout;
#endif
COCAINE_LOG_INFO(m_logger, "libmastermind: collect_info_loop: update period is %d", static_cast<int>(m_group_info_update_period));
do {
collect_info_loop_impl();
process_callbacks();
tm = timeout;
do {
tm = m_weight_cache_condition_variable.wait_for(lock,
std::chrono::seconds(
m_group_info_update_period));
} while(tm == no_timeout && m_done == false);
} while(m_done == false);
}
struct bt_ctf_event *bt_ctf_iter_read_event_flags(struct bt_ctf_iter *iter,
int *flags)
{
struct ctf_file_stream *file_stream;
struct bt_ctf_event *ret;
struct ctf_stream_definition *stream;
struct packet_index *packet_index;
/*
* We do not want to fail for any other reason than end of
* trace, hence the assert.
*/
assert(iter);
if (flags)
*flags = 0;
ret = &iter->current_ctf_event;
file_stream = bt_heap_maximum(iter->parent.stream_heap);
if (!file_stream) {
/* end of file for all streams */
goto stop;
}
/*
* If the packet is empty (contains only headers or is of size 0), the
* caller has to know that we can't read the current event and we need
* to do a bt_iter_next.
*/
if (file_stream->pos.data_offset == file_stream->pos.content_size
|| file_stream->pos.content_size == 0) {
/* More events may come. */
ret = NULL;
if (flags)
*flags |= BT_ITER_FLAG_RETRY;
goto end;
}
stream = &file_stream->parent;
if (iter->parent.end_pos &&
iter->parent.end_pos->type == BT_SEEK_TIME &&
stream->real_timestamp > iter->parent.end_pos->u.seek_time) {
goto stop;
}
ret->parent = g_ptr_array_index(stream->events_by_id,
stream->event_id);
if (!file_stream->pos.packet_index)
packet_index = NULL;
else
packet_index = &g_array_index(file_stream->pos.packet_index,
struct packet_index, file_stream->pos.cur_index);
iter->events_lost = 0;
if (packet_index && packet_index->events_discarded >
file_stream->pos.last_events_discarded) {
if (flags)
*flags |= BT_ITER_FLAG_LOST_EVENTS;
iter->events_lost += packet_index->events_discarded -
file_stream->pos.last_events_discarded;
file_stream->pos.last_events_discarded =
packet_index->events_discarded;
}
if (ret->parent->stream->stream_id > iter->callbacks->len)
goto end;
process_callbacks(iter, ret->parent->stream);
end:
return ret;
stop:
return NULL;
}
void mastermind_t::data::cache_force_update() {
std::lock_guard<std::mutex> lock(m_mutex);
(void) lock;
collect_info_loop_impl();
process_callbacks();
}