我正在使用 boost 进程间和 ptree 结构进行一些测试,当我尝试读取发送的消息时(或者当我尝试在 json 中解析它时)出现段错误。
我在 debian linux 上使用 boost1.49。
我在 json 中序列化它以供以后使用,并且因为我没有找到任何用于直接序列化 boost 属性三的好文档。
这是我用来测试的代码(commed 说段错误在哪里):
接收文件
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/interprocess/ipc/message_queue.hpp>
#include <sstream>
struct test_data{
std::string action;
std::string name;
int faceID;
uint32_t Flags;
uint32_t freshness;
};
test_data recvData()
{
boost::interprocess::message_queue::remove("queue");
boost::property_tree::ptree pt;
test_data data;
std::istringstream buffer;
boost::interprocess::message_queue mq(boost::interprocess::open_or_create,"queue", 1, sizeof(buffer)
boost::interprocess::message_queue::size_type recvd_size;
unsigned int pri;
mq.receive(&buffer,sizeof(buffer),recvd_size,pri);
std::cout << buffer.str() << std::endl; //the segfault is there
boost::property_tree::read_json(buffer,pt);
data.action = pt.get<std::string>("action");
data.name = pt.get<std::string>("name");
data.faceID = pt.get<int>("face");
data.Flags = pt.get<uint32_t>("flags");
data.freshness = pt.get<uint32_t>("freshness");
boost::interprocess::message_queue::remove("queue");
return data;
}
int main()
{
test_data test;
test = recvData();
std::cout << test.action << test.name << test.faceID << test.Flags << test.freshness << std::endl;
}
发件人.cc
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/interprocess/ipc/message_queue.hpp>
#include <sstream>
struct test_data{
std::string action;
std::string name;
int faceID;
uint32_t Flags;
uint32_t freshness;
};
int sendData(test_data data)
{
boost::property_tree::ptree pt;
pt.put("action",data.action);
pt.put("name",data.name);
pt.put("face",data.faceID);
pt.put("flags",data.Flags);
pt.put("freshness",data.freshness);
std::ostringstream buffer;
boost::property_tree::write_json(buffer,pt,false);
boost::interprocess::message_queue mq(boost::interprocess::open_only,"chiappen")
std::cout << sizeof(buffer) << std::endl;
mq.send(&buffer,sizeof(buffer),0);
return 0;
}
int main ()
{
test_data prova;
prova.action = "registration";
prova.name = "prefix";
prova.Flags = 0;
prova.freshness = 52;
sendData(prova);
}