/*
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* =====================================================================================
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*
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* Filename: socket.cpp
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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48分58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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#include "socket.h"
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#include "bh_util.h"
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#include "defs.h"
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#include "msg.h"
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using namespace bhome_msg;
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using namespace bhome_shm;
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namespace
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{
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} // namespace
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ShmSocket::ShmSocket(Shm &shm, const MQId &id, const int len) :
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run_(false), mq_(id, shm, len)
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{
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Start();
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}
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ShmSocket::ShmSocket(bhome_shm::SharedMemory &shm, const int len) :
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run_(false), mq_(shm, len)
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{
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Start();
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}
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ShmSocket::~ShmSocket()
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{
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Stop(); //TODO should stop in sub class, incase thread access sub class data.
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}
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bool ShmSocket::Start(int nworker, const RecvCB &onData, const IdleCB &onIdle)
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{
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auto ioProc = [this, onData, onIdle]() {
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auto DoSend = [this]() { return send_buffer_.TrySend(mq()); };
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auto DoRecv = [=] {
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auto onRecvWithPerMsgCB = [this, onData](ShmSocket &socket, MsgI &imsg, BHMsgHead &head) {
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RecvCB cb;
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if (per_msg_cbs_->Find(head.msg_id(), cb)) {
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cb(socket, imsg, head);
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} else if (onData) {
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onData(socket, imsg, head);
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}
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};
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// do not recv if no cb is set.
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if (!onData && per_msg_cbs_->empty()) {
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return false;
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}
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auto onMsg = [&](MsgI &imsg) {
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DEFER1(imsg.Release(shm()));
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BHMsgHead head;
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if (imsg.ParseHead(head)) {
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onRecvWithPerMsgCB(*this, imsg, head);
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}
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};
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return mq().TryRecvAll(onMsg) > 0; // this will recv all msgs.
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};
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try {
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bool more_to_send = DoSend();
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bool more_to_recv = DoRecv();
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if (onIdle) { onIdle(*this); }
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if (!more_to_send && !more_to_recv) {
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std::this_thread::yield();
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}
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} catch (...) {
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}
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};
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std::lock_guard<std::mutex> lock(mutex_);
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StopNoLock();
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run_.store(true);
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for (int i = 0; i < nworker; ++i) {
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workers_.emplace_back([this, ioProc]() { while (run_) { ioProc(); } });
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}
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return true;
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}
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bool ShmSocket::Stop()
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{
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std::lock_guard<std::mutex> lock(mutex_);
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return StopNoLock();
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}
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bool ShmSocket::StopNoLock()
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{
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if (run_.exchange(false)) {
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for (auto &w : workers_) {
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if (w.joinable()) {
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w.join();
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}
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}
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workers_.clear();
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return true;
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}
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return false;
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}
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//maybe reimplment, using async cbs?
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bool ShmSocket::SyncRecv(bhome_msg::MsgI &msg, bhome_msg::BHMsgHead &head, const int timeout_ms)
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{
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// std::lock_guard<std::mutex> lock(mutex_); // seems no need to lock mutex_.
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bool got = (timeout_ms == 0) ? mq().TryRecv(msg) : mq().Recv(msg, timeout_ms);
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if (got) {
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if (msg.ParseHead(head)) {
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return true;
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} else {
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msg.Release(shm());
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}
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}
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return false;
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}
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