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任何人都可以帮助解决 MFC 应用程序中的内存泄漏问题吗？如果没有以下代码块，该程序似乎可以正常工作。该块包括几个任务的条件执行和将数据传递给 MFC 对话框数据成员，然后更新 MFC 对话框上的指示器。其他测试显示一切正常，除了调试窗口中有内存泄漏消息。平台：WIN 7 64bit，MSVC 2011。谢谢！

#include <vector>
#include <thread> 

//Implementation parallel tasking
void CMASTERDlg::OnCompositeParalleltasking()
{   
const int totTsk=8;
BOOL select[totTsk]={
    m_Parallel_Audio,
    m_Parallel_DDS,
    m_Parallel_HV,
    m_Parallel_Monitor,
    m_Parallel_PDA,
    m_Parallel_Pulnix,
    m_Parallel_Supertime,
    m_Parallel_Temp};

//Put all selected tasks in a thread vector
std::vector<std::thread> threads;
auto pvThread = threads.begin(); 

if (m_Parallel_Audio)
    threads.push_back(std::thread(Audio, 1));
if (m_Parallel_DDS) 
    threads.push_back(std::thread(DDS, 1, 1));
if (m_Parallel_HV) 
    threads.push_back(std::thread(HVgetShow, this, 3));
if (m_Parallel_Monitor) 
    threads.push_back(std::thread(MonitorgetShow, this));
if (m_Parallel_PDA) 
    threads.push_back(std::thread(PDAgetShow, this));
if (m_Parallel_Pulnix) 
    threads.push_back(std::thread(DoNothing, 1));
if (m_Parallel_Supertime) 
    threads.push_back(std::thread(MMCS,Sequence_id, static_cast<LPCSTR>(CStringA(loopnum))));
if (m_Parallel_Temp) 
    threads.push_back(std::thread(TempgetShow,this));

pvThread = threads.begin();
while (pvThread != threads.end())
{
     pvThread->join();
     pvThread++;
}

//update data on front panel
UpdateData(FALSE);
UpdateWindow();


//count selected tasks and output message
int j=0, count=0;
for(j=0; j<totTsk; j++) {
   if (select[j])  count++;
}
char buffer[2];
itoa (count,buffer,10);
string message=string(buffer)+" tasks completed in parallel\n";
TRACE(message.c_str());  //Message in debugging window

}
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1 回答 1

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编码

pvThread = threads.begin();
while (pvThread != threads.end())
{
     pvThread->join();
     pvThread++;
}

对我来说似乎有问题。第一次进入此循环时，当前线程（我假设它是主应用程序 UI 线程）将在第一个线程上调用 join() 时阻塞，直到该线程完成。如果第一个线程至少比其他一些线程花费的时间更长，那么最终你会发现自己在一个已失效的线程上调用了 join()。也许系统在处理这个问题时泄漏了一些东西？

于 2012-05-10T19:12:42.767 回答