在非GUI程序中调用wxThread出现segmentation fault

这个错误时是在我测试wxThread功能的时候出现的，之前一直都是在GUI程序中编写，这次由于我需要单独检查wxThread的功能，于是我就写了一个main函数来调用wxThread，编译能够通过，但是运行的时候一直出错，根据debug 我确定是在生成wxThread实例的时候访问了一个未初始化的锁，这个问题困扰了我大概一天时间，我在官网论坛上找到了对应的解决方案，这里分享一下。

出现这个错误的主要原因是在使用wxWidgets内部数据结构的时候没有调用wxInitializer方法，部分的内置变量未初始化

Your lucky day - I got exactly the same error yesterday :wink: You need to call wxInitialize() before doing any wx stuff, and then wxUninitialize before exit. Alternatively, #include "wx/init.h" and use wxInitializer (see the samples/console for how to use it).

phlox: "Hello" is a literal, it exists a bit longer than the program runs. But I'm absolutely certain the example won't compile as it is. The msg member should be at least of type const char*.

出自https://forums.wxwidgets.org/viewtopic.php?t=7195

原来的测试代码

#include "iostream"
#include "wx/wx.h"
#include "wx/thread.h"

using namespace std;

class MyThread : public wxThread
{
public:
MyThread();
virtual ~MyThread();

// thread execution starts here
virtual void *Entry();
};

MyThread::MyThread()
{
cout<<"elle"<<endl;
}

void * MyThread::Entry()
{
//  while (!TestDestroy())
int i = 10;
while(i-- >0)
{
// ... do a bit of work...
wxThread::Sleep(100);
cout<< "hello"<<endl;
}
return (wxThread::ExitCode)0;     // success
}

MyThread::~MyThread()
{

}

int main()
{
wxThread *p_thread = new MyThread;
if ( <span style="font-family: Arial, Helvetica, sans-serif;">p_thread->Run()</span><span style="font-family: Arial, Helvetica, sans-serif;"> != wxTHREAD_NO_ERROR )</span>
{
wxLogError(wxT("Can't create thread!"));
}
wxThread::Sleep(2000);
return 0;
}

修改之后的代码

#include "iostream"
#include "wx/thread.h"
#include "wx/wx.h"
#include "wx/init.h"
using namespace std;

class MyThread : public wxThread
{
public:
MyThread();
virtual ~MyThread();

// thread execution starts here
virtual void *Entry();
};

MyThread::MyThread()
{
cout<<"elle"<<endl;
}

void * MyThread::Entry()
{
//  while (!TestDestroy())
int i = 10;
while(i-- >0)
{
// ... do a bit of work...
wxThread::Sleep(1000);
cout<< "hello"<<endl;
//wxLogMessage("hello");
}
return (wxThread::ExitCode)0;     // success
}

MyThread::~MyThread()
{

}

int main()
{
wxInitialize();
wxThread *p_thread = new MyThread;
p_thread->Run();
wxThread::Sleep(15000);

return 0;
}