mirror of
https://github.com/sogou/workflow.git
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138 lines
2.9 KiB
C++
138 lines
2.9 KiB
C++
/*
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Copyright (c) 2019 Sogou, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Authors: Xie Han (xiehan@sogou-inc.com)
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Wu Jiaxu (wujiaxu@sogou-inc.com)
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include "list.h"
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#include "thrdpool.h"
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#include "Executor.h"
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struct ExecTaskEntry
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{
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struct list_head list;
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ExecSession *session;
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thrdpool_t *thrdpool;
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};
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int ExecQueue::init()
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{
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INIT_LIST_HEAD(&this->task_list);
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return 0;
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}
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int Executor::init(size_t nthreads)
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{
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if (nthreads == 0)
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{
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errno = EINVAL;
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return -1;
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}
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this->thrdpool = thrdpool_create(nthreads, 0);
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if (this->thrdpool)
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return 0;
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return -1;
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}
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void Executor::deinit()
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{
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thrdpool_destroy(Executor::executor_cancel_tasks, this->thrdpool);
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}
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void __thrdpool_schedule(const struct thrdpool_task *, void *, thrdpool_t *);
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void Executor::executor_thread_routine(void *context)
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{
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ExecQueue *queue = (ExecQueue *)context;
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ExecTaskEntry *entry;
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ExecSession *session;
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queue->mutex.lock();
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entry = list_entry(queue->task_list.next, ExecTaskEntry, list);
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list_del(&entry->list);
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session = entry->session;
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if (!list_empty(&queue->task_list))
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{
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struct thrdpool_task task = {Executor::executor_thread_routine, queue};
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/*
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{
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.routine = Executor::executor_thread_routine,
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.context = queue
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};
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*/
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__thrdpool_schedule(&task, entry, entry->thrdpool);
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}
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else
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delete entry;
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queue->mutex.unlock();
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session->execute();
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session->handle(ES_STATE_FINISHED, 0);
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}
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void Executor::executor_cancel_tasks(const struct thrdpool_task *task)
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{
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ExecQueue *queue = (ExecQueue *)task->context;
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ExecTaskEntry *entry;
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struct list_head *pos, *tmp;
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ExecSession *session;
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list_for_each_safe(pos, tmp, &queue->task_list)
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{
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entry = list_entry(pos, ExecTaskEntry, list);
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list_del(pos);
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session = entry->session;
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delete entry;
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session->handle(ES_STATE_CANCELED, 0);
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}
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}
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int Executor::request(ExecSession *session, ExecQueue *queue)
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{
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ExecTaskEntry *entry = new ExecTaskEntry;
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session->queue = queue;
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entry->session = session;
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entry->thrdpool = this->thrdpool;
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queue->mutex.lock();
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list_add_tail(&entry->list, &queue->task_list);
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if (queue->task_list.next == &entry->list)
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{
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struct thrdpool_task task = {Executor::executor_thread_routine, queue};
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/*
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{
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.routine = Executor::executor_thread_routine,
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.context = queue
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};
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*/
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if (thrdpool_schedule(&task, this->thrdpool) < 0)
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{
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list_del(&entry->list);
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delete entry;
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entry = NULL;
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}
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}
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queue->mutex.unlock();
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return -!entry;
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}
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