int embb_condition_wait_until(embb_condition_t* condition_var,
embb_mutex_t* mutex, const embb_time_t* time) {
assert(condition_var != NULL);
assert(mutex != NULL);
assert(time != NULL);
/* The Windows API needs a time duration, so we need to convert the given time
by using the time now. */
embb_time_t now;
embb_time_now(&now);
/* Check if absolute timepoint (in milliseconds) still is in the future */
if ((time->seconds * 1000 + time->nanoseconds / 1000000)
> (now.seconds * 1000 + now.nanoseconds / 1000000)) {
/* Convert to (unsigned type) milliseconds and round up */
DWORD time_diff = (DWORD) (
time->seconds * 1000 + time->nanoseconds / 1000000
- now.seconds * 1000 - now.nanoseconds / 1000000);
if (SleepConditionVariableCS(condition_var, mutex, time_diff) == 0) {
if (GetLastError() == ERROR_TIMEOUT) {
return EMBB_TIMEDOUT;
} else {
return EMBB_ERROR;
}
}
} else {
return EMBB_TIMEDOUT;
}
return EMBB_SUCCESS;
}
void mtapi_action_disable(
MTAPI_IN mtapi_action_hndl_t action,
MTAPI_IN mtapi_timeout_t timeout,
MTAPI_OUT mtapi_status_t* status) {
mtapi_status_t local_status = MTAPI_ERR_UNKNOWN;
embb_mtapi_log_trace("mtapi_action_disable() called\n");
if (embb_mtapi_node_is_initialized()) {
embb_mtapi_node_t* node = embb_mtapi_node_get_instance();
if (embb_mtapi_action_pool_is_handle_valid(node->action_pool, action)) {
embb_mtapi_action_t* local_action =
embb_mtapi_action_pool_get_storage_for_handle(
node->action_pool, action);
local_action->enabled = MTAPI_FALSE;
embb_mtapi_thread_context_t * context = NULL;
embb_duration_t wait_duration;
embb_time_t end_time;
if (MTAPI_INFINITE < timeout) {
embb_duration_set_milliseconds(
&wait_duration, (unsigned long long)timeout);
embb_time_in(&end_time, &wait_duration);
}
/* cancel all tasks */
embb_mtapi_scheduler_process_tasks(
node->scheduler, embb_mtapi_action_disable_visitor, local_action);
/* find out on which thread we are */
context = embb_mtapi_scheduler_get_current_thread_context(
node->scheduler);
local_status = MTAPI_SUCCESS;
while (embb_atomic_load_int(&local_action->num_tasks)) {
if (MTAPI_INFINITE < timeout) {
embb_time_t current_time;
embb_time_now(¤t_time);
if (embb_time_compare(¤t_time, &end_time) > 0) {
/* timeout! */
local_status = MTAPI_TIMEOUT;
break;
}
}
/* do other work if applicable */
embb_mtapi_scheduler_execute_task_or_yield(
node->scheduler,
node,
context);
}
} else {
local_status = MTAPI_ERR_ACTION_INVALID;
}
} else {
embb_mtapi_log_error("mtapi not initialized\n");
local_status = MTAPI_ERR_NODE_NOTINIT;
}
mtapi_status_set(status, local_status);
}
void mtapi_group_wait_any(
MTAPI_IN mtapi_group_hndl_t group,
MTAPI_OUT void** result,
MTAPI_IN mtapi_timeout_t timeout,
MTAPI_OUT mtapi_status_t* status) {
mtapi_status_t local_status = MTAPI_ERR_UNKNOWN;
embb_mtapi_log_trace("mtapi_group_wait_any() called\n");
if (embb_mtapi_node_is_initialized()) {
embb_mtapi_node_t* node = embb_mtapi_node_get_instance();
if (embb_mtapi_group_pool_is_handle_valid(node->group_pool, group)) {
embb_mtapi_group_t* local_group =
embb_mtapi_group_pool_get_storage_for_handle(
node->group_pool, group);
embb_mtapi_task_t* local_task;
/* are there any tasks left? */
if (0 == embb_atomic_load_int(&local_group->num_tasks)) {
/* group becomes invalid, so delete it */
mtapi_group_delete(group, &local_status);
local_status = MTAPI_GROUP_COMPLETED;
} else {
embb_mtapi_thread_context_t * context = NULL;
embb_duration_t wait_duration;
embb_time_t end_time;
if (MTAPI_INFINITE < timeout) {
embb_duration_set_milliseconds(
&wait_duration, (unsigned long long)timeout);
embb_time_in(&end_time, &wait_duration);
}
/* find out on which thread we are */
context = embb_mtapi_scheduler_get_current_thread_context(
node->scheduler);
/* wait for any task to arrive */
local_status = MTAPI_SUCCESS;
local_task = embb_mtapi_task_queue_pop(&local_group->queue);
while (MTAPI_NULL == local_task) {
if (MTAPI_INFINITE < timeout) {
embb_time_t current_time;
embb_time_now(¤t_time);
if (embb_time_compare(¤t_time, &end_time) > 0) {
/* timeout! */
local_status = MTAPI_TIMEOUT;
break;
}
}
/* do other work if applicable */
embb_mtapi_scheduler_execute_task_or_yield(
node->scheduler,
node,
context);
/* try to pop a task from the group queue */
local_task = embb_mtapi_task_queue_pop(&local_group->queue);
}
/* was there a timeout, or is there a result? */
if (MTAPI_NULL != local_task) {
/* store result */
if (MTAPI_NULL != result) {
*result = local_task->result_buffer;
}
/* return error code set by the task */
local_status = local_task->error_code;
/* delete task */
embb_mtapi_task_delete(local_task, node->task_pool);
embb_atomic_fetch_and_add_int(&local_group->num_tasks, -1);
}
}
} else {
local_status = MTAPI_ERR_GROUP_INVALID;
}
} else {
embb_mtapi_log_error("mtapi not initialized\n");
local_status = MTAPI_ERR_NODE_NOTINIT;
}
mtapi_status_set(status, local_status);
embb_mtapi_log_trace("mtapi_group_wait_any() returns\n");
}
