embb_counter_t* embb_thread_index_counter() {
int compare_to = 0;
if (embb_atomic_load_int(&embb_thread_index_counter_flag) != 2) {
if (embb_atomic_compare_and_swap_int(
&embb_thread_index_counter_flag, &compare_to, 1)) {
embb_counter_init(&embb_thread_index_counter_index);
embb_atomic_store_int(&embb_thread_index_counter_flag, 2);
}
while (embb_atomic_load_int(&embb_thread_index_counter_flag) != 2) {}
}
return &embb_thread_index_counter_index;
}
unsigned int* embb_max_number_thread_indices() {
int compare_to = 0;
if (embb_atomic_load_int(&embb_max_number_thread_indices_flag) != 2) {
if (embb_atomic_compare_and_swap_int(
&embb_max_number_thread_indices_flag, &compare_to, 1)) {
embb_max_number_thread_indices_max =
(int)(embb_core_count_available() * 2);
embb_atomic_store_int(&embb_max_number_thread_indices_flag, 2);
}
while (embb_atomic_load_int(&embb_max_number_thread_indices_flag) != 2) {}
}
return (unsigned int*) &embb_max_number_thread_indices_max;
}
mtapi_boolean_t embb_mtapi_thread_context_start(
embb_mtapi_thread_context_t* that,
embb_mtapi_scheduler_t * scheduler) {
int err;
embb_mtapi_scheduler_worker_func_t * worker_func;
embb_core_set_t core_set;
assert(MTAPI_NULL != that);
assert(MTAPI_NULL != scheduler);
worker_func = embb_mtapi_scheduler_worker_func(scheduler);
/* pin thread to core */
embb_core_set_init(&core_set, 0);
embb_core_set_add(&core_set, that->core_num);
/* create thread */
if (that->is_main_thread) {
/* reuse main thread */
that->thread = embb_thread_current();
err = embb_tss_create(&that->tss_id);
if (EMBB_SUCCESS != err) {
/* report error to scheduler */
embb_atomic_store_int(&that->run, -1);
return MTAPI_FALSE;
}
embb_tss_set(&(that->tss_id), that);
embb_atomic_store_int(&that->run, 1);
} else {
err = embb_thread_create_with_priority(
&that->thread, &core_set, that->thread_priority, worker_func, that);
if (EMBB_SUCCESS != err) {
embb_mtapi_log_error(
"embb_mtapi_ThreadContext_initializeWithNodeAndCoreNumber() could not "
"create thread %d on core %d\n", that->worker_index, that->core_num);
return MTAPI_FALSE;
}
/* wait for worker to come up */
while (0 == embb_atomic_load_int(&that->run)) {
embb_thread_yield();
}
}
if (0 < embb_atomic_load_int(&that->run)) {
return MTAPI_TRUE;
} else {
return MTAPI_FALSE;
}
}
void mtapi_group_delete(
MTAPI_IN mtapi_group_hndl_t group,
MTAPI_OUT mtapi_status_t* status) {
mtapi_status_t local_status = MTAPI_ERR_UNKNOWN;
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);
if (embb_atomic_load_int(&local_group->deleted)) {
local_status = MTAPI_ERR_GROUP_INVALID;
} else {
embb_mtapi_group_finalize(local_group);
embb_mtapi_group_pool_deallocate(node->group_pool, local_group);
local_status = MTAPI_SUCCESS;
}
} else {
local_status = MTAPI_ERR_GROUP_INVALID;
}
} else {
local_status = MTAPI_ERR_NODE_NOTINIT;
}
mtapi_status_set(status, local_status);
}
mtapi_task_state_t mtapi_context_taskstate_get(
MTAPI_IN mtapi_task_context_t* task_context,
MTAPI_OUT mtapi_status_t* status) {
mtapi_status_t local_status = MTAPI_ERR_UNKNOWN;
mtapi_task_state_t task_state = MTAPI_TASK_ERROR;
embb_mtapi_log_trace("mtapi_context_taskstate_get() called\n");
if (MTAPI_NULL != task_context) {
embb_mtapi_thread_context_t* local_context =
(embb_mtapi_thread_context_t*)embb_tss_get(
&(task_context->thread_context->tss_id));
if (local_context == task_context->thread_context) {
task_state = (mtapi_task_state_t)embb_atomic_load_int(
&task_context->task->state);
local_status = MTAPI_SUCCESS;
} else {
local_status = MTAPI_ERR_CONTEXT_OUTOFCONTEXT;
}
} else {
local_status = MTAPI_ERR_CONTEXT_INVALID;
}
mtapi_status_set(status, local_status);
return task_state;
}
void embb_mtapi_thread_context_stop(embb_mtapi_thread_context_t* that) {
int result;
if (0 < embb_atomic_load_int(&that->run)) {
embb_atomic_store_int(&that->run, 0);
embb_condition_notify_one(&that->work_available);
if (MTAPI_FALSE == that->is_main_thread) {
embb_thread_join(&(that->thread), &result);
}
}
}
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");
}
