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89 lines
1.8 KiB
89 lines
1.8 KiB
/*
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Copyright (c) 2022 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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*/
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#ifndef _WFMESSAGEQUEUE_H_
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#define _WFMESSAGEQUEUE_H_
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#include <mutex>
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#include "list.h"
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#include "WFTask.h"
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class WFMessageQueue
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{
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public:
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WFConditional *get(SubTask *task, void **msgbuf);
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WFConditional *get(SubTask *task);
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void post(void *msg);
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public:
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struct Data
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{
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void *pop() { return this->queue->pop(); }
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void push(void *msg) { this->queue->push(msg); }
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struct list_head msg_list;
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struct list_head wait_list;
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std::mutex mutex;
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WFMessageQueue *queue;
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};
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protected:
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struct MessageEntry
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{
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struct list_head list;
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void *msg;
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};
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protected:
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virtual void *pop()
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{
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struct MessageEntry *entry;
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void *msg;
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entry = list_entry(this->data.msg_list.next, struct MessageEntry, list);
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list_del(&entry->list);
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msg = entry->msg;
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delete entry;
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return msg;
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}
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virtual void push(void *msg)
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{
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struct MessageEntry *entry = new struct MessageEntry;
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entry->msg = msg;
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list_add_tail(&entry->list, &this->data.msg_list);
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}
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protected:
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struct Data data;
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public:
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WFMessageQueue()
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{
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INIT_LIST_HEAD(&this->data.msg_list);
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INIT_LIST_HEAD(&this->data.wait_list);
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this->data.queue = this;
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}
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virtual ~WFMessageQueue() { }
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};
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#endif
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