最初に私はこれを尋ねましたブーストスレッドからメインスレッドで関数を実行し、その関数にパラメーターを渡します
だから今私はこれを試しています：
以下は、大きなプロジェクトを完全にシミュレートしたコンソールC++プロジェクトです。
TestServicePost.cpp
#include "stdafx.h"
#include "SomeClass.h"
int _tmain(int argc, _TCHAR* argv[])
{
SomeClass* s = new SomeClass();
while(true)
{
s->update();
}
return 0;
}
SomeClass.h
#include <boost/thread.hpp>
#include <boost/asio.hpp>
#include <queue>
class ServiceNote
{
public:
std::string getType()
{
std::stringstream typeSS;
typeSS << "LamasaTech.MultiWall.PostNote." << (NoteType.compare("Normal") == 0 ? "Node" : "Header") << "." << Shape << "." << Colour;
return typeSS.str();
}
int Action;
int CNoteId;
std::string Colour;
int NoteId;
std::string NoteType;
int SessionId;
std::string Shape;
std::string Style;
std::string Text;
int X;
int Y;
};
class SomeClass
{
public:
SomeClass();
~SomeClass();
void update();
private:
std::queue<ServiceNote> pendingNotes;
void addToQueue(ServiceNote sn);
void pollService(boost::asio::io_service* svc);
int getMessage(boost::asio::io_service* svc, std::string sessionId, int messageId);
boost::thread servicePoller;
};
SomeClass.cpp
#include "stdafx.h"
#include "SomeClass.h"
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/asio/signal_set.hpp>
#define POLL_SERVICE = 0;
#define POLLING_WAIT_TIME 1000
#define SAVE_SESSION_EVERY 1800000
SomeClass::SomeClass()
{
boost::asio::io_service io_servicePoller;
io_servicePoller.run();
servicePoller = boost::thread(boost::bind(&SomeClass::pollService, this, &io_servicePoller));
/*boost::asio::io_service io_sessionSaver;
boost::asio::signal_set signalsSaver(io_sessionSaver, SIGINT, SIGTERM);
signalsSaver.async_wait( boost::bind(&boost::asio::io_service::stop, &io_sessionSaver));
sessionSaver = boost::thread(&SomeClass::saveSessionEvery, io_sessionSaver);*/
}
SomeClass::~SomeClass()
{
}
void SomeClass::update()
{
while(!pendingNotes.empty())
{
ServiceNote sn = pendingNotes.front();
pendingNotes.pop();
}
}
void SomeClass::addToQueue(ServiceNote sn)
{
pendingNotes.push(sn);
}
void SomeClass::pollService(boost::asio::io_service* svc)
{
int messageId = 1;
while(true)
{
if(boost::this_thread::interruption_enabled() && boost::this_thread::interruption_requested())
return;
int currentId = messageId;
messageId = getMessage(svc, "49", messageId);
if(currentId == messageId)
boost::this_thread::sleep(boost::posix_time::milliseconds(POLLING_WAIT_TIME));
}
}
int SomeClass::getMessage(boost::asio::io_service* svc, std::string sessionId, int messageId)
{
try
{
boost::asio::io_service io_service;
// Get a list of endpoints corresponding to the server name.
boost::asio::ip::tcp::resolver resolver(io_service);
boost::asio::ip::tcp::resolver::query query("mw.rombus.com", "http");
boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
// Try each endpoint until we successfully establish a connection.
boost::asio::ip::tcp::socket socket(io_service);
boost::asio::connect(socket, endpoint_iterator);
// Form the request. We specify the "Connection: close" header so that the
// server will close the socket after transmitting the response. This will
// allow us to treat all data up until the EOF as the content.
boost::asio::streambuf request;
std::ostream request_stream(&request);
request_stream << "GET " "/Service.svc/message/" << sessionId << "/" << messageId << " HTTP/1.0\r\n";
request_stream << "Host: " << "mw.rombus.com" << "\r\n";
request_stream << "Accept: */*\r\n";
request_stream << "Connection: close\r\n\r\n";
// Send the request.
boost::asio::write(socket, request);
// Read the response status line. The response streambuf will automatically
// grow to accommodate the entire line. The growth may be limited by passing
// a maximum size to the streambuf constructor.
boost::asio::streambuf response;
boost::asio::read_until(socket, response, "\r\n");
// Check that response is OK.
std::istream response_stream(&response);
std::string http_version;
response_stream >> http_version;
unsigned int status_code;
response_stream >> status_code;
std::string status_message;
std::getline(response_stream, status_message);
if (!response_stream || http_version.substr(0, 5) != "HTTP/")
{
//std::cout << "Invalid response\n";
return messageId;
}
if (status_code != 200)
{
//std::cout << "Response returned with status code " << status_code << "\n";
return messageId;
}
// Read the response headers, which are terminated by a blank line.
boost::asio::read_until(socket, response, "\r\n\r\n");
// Process the response headers.
std::string header;
std::string fullHeader = "";
while (std::getline(response_stream, header) && header != "\r")
fullHeader.append(header).append("\n");
// Write whatever content we already have to output.
std::string fullResponse = "";
if (response.size() > 0)
{
std::stringstream ss;
ss << &response;
fullResponse = ss.str();
try
{
boost::property_tree::ptree pt;
boost::property_tree::read_json(ss, pt);
ServiceNote sn;
sn.Action = pt.get<int>("Action");
sn.CNoteId = pt.get<int>("CNoteId");
sn.Colour = pt.get<std::string>("Colour");
sn.NoteId = pt.get<int>("NoteId");
sn.NoteType = pt.get<std::string>("NoteType");
sn.SessionId = pt.get<int>("SessionId");
sn.Shape = pt.get<std::string>("Shape");
sn.Style = pt.get<std::string>("Style");
sn.Text = pt.get<std::string>("Text");
sn.X = pt.get<int>("X");
sn.Y = pt.get<int>("Y");
svc->post(boost::bind(&SomeClass::addToQueue, this, sn));
//pendingNotes.push(sn);
}
catch (std::exception const& e)
{
std::string test = e.what();
//std::cerr << e.what() << std::endl;
}
messageId++;
}
// Read until EOF, writing data to output as we go.
std::string fullSth = "";
boost::system::error_code error;
while (boost::asio::read(socket, response,
boost::asio::transfer_at_least(1), error))
{
std::ostringstream ss;
ss << &response;
fullSth = ss.str();
}
if (error != boost::asio::error::eof)
throw boost::system::system_error(error);
}
catch (std::exception& e)
{
std::string test = e.what();
std::cout << "Exception: " << e.what() << "\n";
}
return messageId;
}
Unhandled exception at 0x771215de in TestServicePost.exe: 0xC0000005: Access violation writing location 0xcccccce4.しかし、この行が実行された直後に、私は取得します：
svc->post(boost::bind(&SomeClass::addToQueue, this, sn));
io_serviceをクラスメンバーとして定義できなかったので、デストラクタ~SomeClass()で使用できます。それについても助けていただければ幸いです。
io_service.postが私にとって最善の解決策ではない場合は、何かをお勧めします。コンストラクタ、デストラクタ、およびティックごとに呼び出される更新メソッドがあることがわかります。これとキューだけを使用してみましたが、スレッドセーフではありませんでした。 、使用するのが簡単なスレッドセーフなFIFOはありますか？