参数传递给函数在一个boost ::线程 [英] pass arguments to function in a boost::thread

问题描述

这是使用升压线程函数，并在此之前，我有一个多线程的工作知之甚少我的第一次。我试图同时运行初始调用一个函数的第二个实例，这样就可以通过两个不同的变量相同的功能，我希望我的速度向上的程序。与code我知道，我不断收到一个错误C2784它说

 'T *的boost :: get_pointer（常量的boost :: scoped_ptr的＆LT; T＆GT;＆安培;）：不能推导出模板参数的常量的boost :: scoped_ptr的＆LT; T＆GT; ＆放大器;'从'常量的std ::字符串'
 

这里的code的，与线程创建交易的段

 字符串firstPart = recText.substr（1，（subPart1-1））;
串二部= recText.substr（subPart1，subPart1）;提高::螺纹firstThread;
提高::螺纹secondThread;firstThread =的boost ::线程（安培;转换::转换，firstPart）;
secondThread =的boost ::线程（安培;转换::转换，二部）;
firstThread.join（）;
secondThread.join（）;
 

修改

 无效转换::转换（字符串_Part）
{
INT value_Part = 1;
INT valueShort = 0;
int值=校验值;
如果（价值== value_Part）
{
      // 做东西
    }
}
 

解决方案

成员函数取类型的隐式的第一个参数（CV合格） T * ，其中 T 与成员函数的类。您需要将指针传递给一个转换实例，例如，

 转成c;
firstThread =的boost ::线程（安培;转换::转换，和C，firstPart）;
 

This is my first time using the boost thread function and prior to this I have little knowledge of working with multiple threads. I attempting to run a second instance of a function alongside the initial call so I can pass two different variables to the same function, which I'm hoping speeds my program up. with the code I have know I keep getting a C2784 Error which says

'T *boost::get_pointer(const boost::scoped_ptr<T> &)' : could not deduce template argument for 'const boost::scoped_ptr<T> &' from 'const std::string'

here's the snippet of code that deals with the thread creation

string firstPart = recText.substr(1,(subPart1-1));
string secondPart = recText.substr(subPart1,subPart1);

boost::thread firstThread;
boost::thread secondThread;

firstThread = boost::thread(&Conversion::conversion,firstPart);
secondThread = boost::thread(&Conversion::conversion,secondPart);
firstThread.join();
secondThread.join();

edit

void Conversion::conversion(string _Part)
{
int value_Part = 1;
int valueShort = 0;
int value = checkValue;
if(value == value_Part)
{
      // do stuff
    }
}

解决方案

Member functions take an implicit first parameter of type (cv qualified) T*, where T is the class with the member function. You need to pass a pointer to a Conversion instance, for example,

Conversion c;
firstThread = boost::thread(&Conversion::conversion, &c, firstPart);

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