/*
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* =====================================================================================
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*
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* Filename: socket.h
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*
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* Description:
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*
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* Version: 1.0
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* Created: 2021年03月30日 15时49分19秒
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* Revision: none
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* Compiler: gcc
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*
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* Author: Li Chao (),
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* Organization:
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*
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* =====================================================================================
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*/
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#ifndef SOCKET_GWTJHBPO
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#define SOCKET_GWTJHBPO
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#include "bh_util.h"
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#include "defs.h"
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#include "shm_queue.h"
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#include <atomic>
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#include <boost/noncopyable.hpp>
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#include <condition_variable>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <thread>
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#include <vector>
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using namespace bhome_msg;
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class ShmSocket : private boost::noncopyable
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{
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template <class DoSend>
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inline bool SendImpl(MsgI &msg, const int timeout_ms, const DoSend &doSend)
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{
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bool r = false;
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DEFER1(if (msg.IsCounted() || !r) { msg.Release(shm()); });
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r = doSend(msg);
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return r;
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}
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protected:
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typedef bhome_shm::ShmMsgQueue Queue;
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public:
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typedef bhome_shm::SharedMemory Shm;
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typedef std::function<void(ShmSocket &sock, MsgI &imsg, BHMsgHead &head)> RecvCB;
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typedef std::function<bool(ShmSocket &sock, MsgI &imsg, BHMsgHead &head)> PartialRecvCB;
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typedef std::function<void(ShmSocket &sock)> IdleCB;
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ShmSocket(Shm &shm, const MQId &id, const int len);
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ShmSocket(Shm &shm, const int len = 12);
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~ShmSocket();
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static bool Remove(SharedMemory &shm, const MQId &id) { return Queue::Remove(shm, id); }
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const MQId &id() const { return mq().Id(); }
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Shm &shm() { return shm_; }
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// start recv.
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bool Start(int nworker = 1, const RecvCB &onData = RecvCB(), const IdleCB &onIdle = IdleCB());
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bool Start(const RecvCB &onData, const IdleCB &onIdle, int nworker = 1) { return Start(nworker, onData, onIdle); }
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bool Start(const RecvCB &onData, int nworker = 1) { return Start(nworker, onData); }
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bool Stop();
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size_t Pending() const { return mq().Pending(); }
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bool Send(const void *valid_remote, const MsgI &imsg, const int timeout_ms)
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{
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assert(valid_remote);
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return mq().Send(*static_cast<const MQId *>(valid_remote), imsg, timeout_ms);
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}
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//TODO reimplment, using async.
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bool SyncRecv(MsgI &msg, bhome::msg::BHMsgHead &head, const int timeout_ms);
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template <class Body>
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bool Send(const void *valid_remote, const BHMsgHead &head, const Body &body, const int timeout_ms, const RecvCB &cb)
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{
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auto DoSend = [&](MsgI &msg) { return mq().Send(*static_cast<const MQId *>(valid_remote), msg, timeout_ms, [&]() { async_cbs_->Add(head.msg_id(), cb); }); };
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MsgI msg;
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return msg.Make(shm(), head, body) && SendImpl(msg, timeout_ms, DoSend);
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}
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template <class Body>
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bool Send(const void *valid_remote, const BHMsgHead &head, const Body &body, const int timeout_ms)
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{
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auto DoSend = [&](MsgI &msg) { return mq().Send(*static_cast<const MQId *>(valid_remote), msg, timeout_ms); };
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MsgI msg;
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return msg.Make(shm(), head, body) && SendImpl(msg, timeout_ms, DoSend);
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}
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template <class Body>
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bool SendAndRecv(const void *remote, const BHMsgHead &head, const Body &body, MsgI &reply, BHMsgHead &reply_head, const int timeout_ms)
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{
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struct State {
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std::mutex mutex;
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std::condition_variable cv;
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bool canceled = false;
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};
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try {
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std::shared_ptr<State> st(new State);
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auto endtime = std::chrono::steady_clock::now() + std::chrono::milliseconds(timeout_ms);
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auto OnRecv = [st, &reply, &reply_head](ShmSocket &sock, MsgI &msg, BHMsgHead &head) {
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std::unique_lock<std::mutex> lk(st->mutex);
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if (!st->canceled) {
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reply.swap(msg);
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reply_head.Swap(&head);
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st->cv.notify_one();
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} else {
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}
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};
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std::unique_lock<std::mutex> lk(st->mutex);
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bool sendok = Send(remote, head, body, timeout_ms, OnRecv);
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if (sendok && st->cv.wait_until(lk, endtime) == std::cv_status::no_timeout) {
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return true;
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} else {
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st->canceled = true;
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return false;
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}
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} catch (...) {
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return false;
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}
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}
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protected:
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const Shm &shm() const { return shm_; }
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Queue &mq() { return mq_; } // programmer should make sure that mq_ is valid.
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const Queue &mq() const { return mq_; }
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std::mutex &mutex() { return mutex_; }
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private:
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bool StopNoLock();
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bool RunningNoLock() { return !workers_.empty(); }
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Shm &shm_;
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std::vector<std::thread> workers_;
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std::mutex mutex_;
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std::atomic<bool> run_;
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Queue mq_;
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class AsyncCBs
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{
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std::unordered_map<std::string, RecvCB> store_;
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public:
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bool Add(const std::string &id, const RecvCB &cb) { return store_.emplace(id, cb).second; }
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bool Find(const std::string &id, RecvCB &cb)
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{
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auto pos = store_.find(id);
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if (pos != store_.end()) {
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cb.swap(pos->second);
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store_.erase(pos);
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return true;
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} else {
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return false;
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}
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}
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};
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Synced<AsyncCBs> async_cbs_;
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};
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#endif // end of include guard: SOCKET_GWTJHBPO
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