/*
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* =====================================================================================
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*
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* Filename: shm_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 SHM_SOCKET_GWTJHBPO
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#define SHM_SOCKET_GWTJHBPO
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#include "bh_util.h"
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#include "defs.h"
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#include "sendq.h"
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#include "shm_msg_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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protected:
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typedef ShmMsgQueue Queue;
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public:
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typedef ShmMsgQueue::MQId MQId;
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typedef bhome_shm::SharedMemory Shm;
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typedef std::function<void(ShmSocket &sock, Queue::RawData &val)> RawRecvCB;
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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 bool create_or_else_find, const MQId id, const int len);
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ShmSocket(int64_t offset, Shm &shm, const MQId id);
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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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bool Remove() { return Remove(shm(), id()); }
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MQId id() const { return mq().Id(); }
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int64_t AbsAddr() const { return mq().AbsAddr(); }
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void SetNodeProc(const int proc_index, const int socket_index)
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{
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node_proc_index_ = proc_index;
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socket_index_ = socket_index;
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}
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// start recv.
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bool Start(int nworker = 1, const RecvCB &onMsg = RecvCB(), const RawRecvCB &onRaw = RawRecvCB(), const IdleCB &onIdle = IdleCB());
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bool Start(const RecvCB &onData, const IdleCB &onIdle, int nworker = 1) { return Start(nworker, onData, RawRecvCB(), 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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bool RequestAlloc(const int64_t size, std::function<void(MsgI &msg)> const &onResult);
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template <class Body>
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bool Send(const MQInfo &remote, BHMsgHead &head, Body &body, RecvCB &&cb = RecvCB())
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{
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return Send(remote, MsgI::Serialize(head, body), head.msg_id(), std::move(cb));
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}
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template <class... T>
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bool Send(const MQInfo &remote, const MsgI &imsg, T &&...t)
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{
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return SendImpl(remote, imsg, std::forward<decltype(t)>(t)...);
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}
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template <class... T>
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bool Send(const MQInfo &remote, const int64_t cmd, T &&...t)
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{
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return SendImpl(remote, cmd, std::forward<decltype(t)>(t)...);
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}
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template <class Body>
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bool SendAndRecv(const MQInfo &remote, BHMsgHead &head, 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 { // ignore
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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, std::move(OnRecv));
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if (!sendok) {
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LOG_DEBUG() << "send timeout";
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}
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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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SetLastError(ETIMEDOUT, "timeout");
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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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Shm &shm() const { return mq().shm(); }
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protected:
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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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bool Send(const MQInfo &remote, std::string &&content, const std::string &msg_id, RecvCB &&cb = RecvCB());
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template <class... Rest>
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bool SendImpl(Rest &&...rest)
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{
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return send_buffer_.Append(std::forward<decltype(rest)>(rest)...);
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}
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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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template <class Key, class CB>
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class CallbackRecords
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{
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std::unordered_map<Key, CB> store_;
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public:
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bool empty() const { return store_.empty(); }
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bool Store(const Key &id, CB &&cb) { return store_.emplace(id, std::move(cb)).second; }
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bool Pick(const Key &id, CB &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<CallbackRecords<std::string, RecvCB>> per_msg_cbs_;
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Synced<CallbackRecords<int, RawRecvCB>> alloc_cbs_;
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// node request center alloc memory.
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int node_proc_index_ = -1;
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int socket_index_ = -1;
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std::atomic<int> alloc_id_;
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SendQ send_buffer_;
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};
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#endif // end of include guard: SHM_SOCKET_GWTJHBPO
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