/*===========================================================================*
* get_work *
*===========================================================================*/
static void get_work(struct worker_thread *worker)
{
/* Find new work to do. Work can be 'queued', 'pending', or absent. In the
* latter case wait for new work to come in. */
struct job *new_job;
struct fproc *rfp;
ASSERTW(worker);
self = worker;
/* Do we have queued work to do? */
if ((new_job = worker->w_job.j_next) != NULL) {
worker->w_job = *new_job;
free(new_job);
return;
} else if (worker != &sys_worker && worker != &dl_worker && pending > 0) {
/* Find pending work */
for (rfp = &fproc[0]; rfp < &fproc[NR_PROCS]; rfp++) {
if (rfp->fp_flags & FP_PENDING) {
worker->w_job = rfp->fp_job;
rfp->fp_job.j_func = NULL;
rfp->fp_flags &= ~FP_PENDING; /* No longer pending */
pending--;
assert(pending >= 0);
return;
}
}
panic("Pending work inconsistency");
}
/* Wait for work to come to us */
worker_sleep(worker);
}
/**
* Work.
*
*/
void
worker_start(worker_type* worker)
{
time_t now, timeout = 1;
task_type *task_that_was_worked_on;
ods_log_assert(worker);
while (worker->need_to_exit == 0) {
ods_log_debug("[worker[%i]]: report for duty", worker->thread_num);
lock_basic_lock(&worker->engine->taskq->schedule_lock);
/* [LOCK] schedule */
worker->task = schedule_pop_task(worker->engine->taskq);
if (worker->task) {
/* [UNLOCK] schedule */
lock_basic_unlock(&worker->engine->taskq->schedule_lock);
ods_log_debug("[worker[%i]] start working", worker->thread_num);
worker->clock_in = time(NULL);
worker_perform_task(worker);
task_that_was_worked_on = worker->task;
worker->task = NULL;
ods_log_debug("[worker[%i]] finished working", worker->thread_num);
if (task_that_was_worked_on)
(void) lock_and_schedule_task(worker->engine->taskq,
task_that_was_worked_on, 1);
timeout = 1;
} else {
ods_log_debug("[worker[%i]] nothing to do", worker->thread_num);
worker->task = schedule_get_first_task(worker->engine->taskq);
/* [UNLOCK] schedule */
lock_basic_unlock(&worker->engine->taskq->schedule_lock);
now = time_now();
if (worker->task && !worker->engine->taskq->loading) {
timeout = (worker->task->when - now);
} else {
timeout *= 2;
if (timeout > ODS_SE_MAX_BACKOFF) {
timeout = ODS_SE_MAX_BACKOFF;
}
}
worker->task = NULL;
worker_sleep(worker, timeout);
}
}
return;
}
/*===========================================================================*
* worker_wait *
*===========================================================================*/
void worker_wait(void)
{
self->w_job.j_err_code = err_code;
worker_sleep(self);
/* We continue here after waking up */
fp = self->w_job.j_fp; /* Restore global data */
err_code = self->w_job.j_err_code;
assert(self->w_next == NULL);
}
/**
* Work.
*
*/
static void
worker_work(worker_type* worker)
{
time_t now = 0;
time_t timeout = 1;
engine_type* engine = NULL;
zone_type* zone = NULL;
ods_status status = ODS_STATUS_OK;
ods_log_assert(worker);
ods_log_assert(worker->type == WORKER_WORKER);
engine = (engine_type*) worker->engine;
while (worker->need_to_exit == 0) {
ods_log_debug("[%s[%i]] report for duty", worker2str(worker->type),
worker->thread_num);
now = time_now();
lock_basic_lock(&engine->taskq->schedule_lock);
worker->task = schedule_pop_task(engine->taskq);
if (worker->task) {
worker->working_with = worker->task->what;
lock_basic_unlock(&engine->taskq->schedule_lock);
zone = (zone_type*) worker->task->zone;
lock_basic_lock(&zone->zone_lock);
ods_log_debug("[%s[%i]] start working on zone %s",
worker2str(worker->type), worker->thread_num, zone->name);
worker->clock_in = time(NULL);
worker_perform_task(worker);
zone->task = worker->task;
ods_log_debug("[%s[%i]] finished working on zone %s",
worker2str(worker->type), worker->thread_num, zone->name);
lock_basic_lock(&engine->taskq->schedule_lock);
worker->task = NULL;
worker->working_with = TASK_NONE;
status = schedule_task(engine->taskq, zone->task, 1);
if (status != ODS_STATUS_OK) {
ods_log_error("[%s[%i]] unable to schedule task for zone %s: "
"%s", worker2str(worker->type), worker->thread_num,
zone->name, ods_status2str(status));
}
lock_basic_unlock(&engine->taskq->schedule_lock);
lock_basic_unlock(&zone->zone_lock);
timeout = 1;
/** Do we need to tell the engine that we require a reload? */
lock_basic_lock(&engine->signal_lock);
if (engine->need_to_reload) {
lock_basic_alarm(&engine->signal_cond);
}
lock_basic_unlock(&engine->signal_lock);
} else {
ods_log_debug("[%s[%i]] nothing to do", worker2str(worker->type),
worker->thread_num);
worker->task = schedule_get_first_task(engine->taskq);
lock_basic_unlock(&engine->taskq->schedule_lock);
if (worker->task && !engine->taskq->loading) {
timeout = (worker->task->when - now);
} else {
timeout *= 2;
}
if (timeout > ODS_SE_MAX_BACKOFF) {
timeout = ODS_SE_MAX_BACKOFF;
}
worker->task = NULL;
worker_sleep(worker, timeout);
}
}
return;
}
