在 Xcode 中提升线程错误访问

Question

更新：如果我使用 libc++ 编译，则会出现错误，但是当我将编译器更改为 libstdc++（GNU C++ 标准库）时，程序将运行而不会显示任何错误。

我正在尝试一些来自 boost 网站的示例代码，但不知何故在运行此代码时我遇到了错误的访问错误。代码运行良好，直到它调用了它看起来的析构函数。

-lmysqlclient-lm-lz-lboost_date_time-lboost_system-lboost_filesystem已链接。

有谁知道我做错了什么？

#include <iostream>
#include <boost/asio.hpp>
#include <boost/thread/thread.hpp>
#include <boost/bind.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>

class printer
{
public:
    printer(boost::asio::io_service& io)
    : strand_(io),
    timer1_(io, boost::posix_time::seconds(1)),
    timer2_(io, boost::posix_time::seconds(1)),
    count_(0)
    {
        timer1_.async_wait(strand_.wrap(boost::bind(&printer::print1, this)));
        timer2_.async_wait(strand_.wrap(boost::bind(&printer::print2, this)));
    }

    ~printer()
    {
        std::cout << "Final count is " << count_ << "\n";
    }

    void print1()
    {
        if (count_ < 10)
        {
            std::cout << "Timer 1: " << count_ << "\n";
            ++count_;

            timer1_.expires_at(timer1_.expires_at() + boost::posix_time::seconds(1));
            timer1_.async_wait(strand_.wrap(boost::bind(&printer::print1, this)));
        }
    }

    void print2()
    {
        if (count_ < 10)
        {
            std::cout << "Timer 2: " << count_ << "\n";
            ++count_;

            timer2_.expires_at(timer2_.expires_at() + boost::posix_time::seconds(1));
            timer2_.async_wait(strand_.wrap(boost::bind(&printer::print2, this)));
        }
    }

private:
    boost::asio::strand strand_;
    boost::asio::deadline_timer timer1_;
    boost::asio::deadline_timer timer2_;
    int count_;
};

int main()
{
    boost::asio::io_service io;
    printer p(io);
    boost::thread t(boost::bind(&boost::asio::io_service::run, &io));
    io.run();
    t.join();

    return 0;
}

Original image

我不确定这是否是堆栈跟踪...

Answer 1

我使用 gcc 4.2.1 在我的 Mac 上构建并运行您的代码没有问题

samm$ g++ --version
i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
samm$ ./a.out
Timer 1: 0
Timer 2: 1
Timer 1: 2
Timer 2: 3
Timer 1: 4
Timer 2: 5
Timer 1: 6
Timer 2: 7
Timer 1: 8
Timer 2: 9
Final count is 10
samm$ 

我使用相同的工具链来构建我的 boost 库

samm$ grep BOOST_LIB_VERSION /opt/local/include/boost/version.hpp 
//  BOOST_LIB_VERSION must be defined to be the same as BOOST_VERSION
#define BOOST_LIB_VERSION "1_53"
samm$ 

我建议使用相同的工具链来构建 boost 和您的应用程序。