是否可以将 C++ 中的 std::thread 线程转换或转换为 Windows 中的 HANDLE？
我一直在尝试使用线程的 WINAPI 函数在 Windows 中管理线程，但我无法让它工作...
#include <thread>
#include <string>
#include <iostream>
#include <windows.h>
void Hi(std::string n){
while(true){
std::cout<<"Hi :3 "<<n<<"\n";
std::this_thread::sleep_for(std::chrono::seconds(1));
}
}
int main(void){
std::thread first(Hi, "zoditu");
first.detach();
getc(stdin);
//SuspendThread((void*)first.native_handle());
TerminateThread((void*)first.native_handle(), (unsigned long)0x00);
CloseHandle((void*)first.native_handle());
std::cout<<"No D:!!\n";
getc(stdin);
return 0;
}
但似乎什么也没做，因为线程不断在控制台中生成“Hi's”...是否有办法使用 WINAPI 来“杀死”它？
我认为将 std::thread::native_handle() 返回的值直接用于 Win32 API 函数没有任何问题(即不需要转换)。
以下程序适合我。 但是，如果线程在主动执行时被终止，它通常(总是？)会崩溃，但如果线程在终止前被挂起，它就可以正常工作。正如您所知以及其他人指出的那样，终止线程通常不是一个好主意。
但回答您的问题 Win32 API 似乎可以按预期工作，无需任何额外的转换。以下程序适合我。
程序:
#include <windows.h>
#include <iostream>
#include <string>
#include <thread>
void foo()
{
while (true)
{
std::cout << "foo()\n";
std::this_thread::sleep_for(std::chrono::seconds(1));
}
}
int main(void)
{
std::thread first(foo);
bool isFinished = false;
while (!isFinished)
{
char ch = ::getchar();
::getchar(); // Swallow the new line character
if (ch == 'e')
{
isFinished = true;
}
else if (ch == 's')
{
DWORD result = ::SuspendThread(first.native_handle());
if (result != -1)
{
std::cout << "Successfully suspended thread\n";
}
else
{
std::cout << "Failed to suspend thread: failure resson " << ::GetLastError() << "\n";
}
}
else if (ch == 'r')
{
DWORD result = ::ResumeThread(first.native_handle());
if (result != -1)
{
std::cout << "Successfully resumed thread\n";
}
else
{
std::cout << "Failed to resume thread: failure resson " << ::GetLastError() << "\n";
}
}
else if (ch == 'k')
{
DWORD result = ::TerminateThread(first.native_handle(), 1);
if (result != 0)
{
std::cout << "Successfully terminated thread\n";
}
else
{
std::cout << "Failed to terminate thread: failure resson " << ::GetLastError() << "\n";
}
}
else
{
std::cout << "Unhandled char '" << ch << "'\n";
}
}
first.detach();
std::cout << "waiting to exit main...";
::getchar();
std::cout << "exiting...\n";
return 0;
}
示例输出(我添加的评论):
foo()
foo()
foo()
foo()
s
Successfully suspended thread // This was successful since 'foo()' is no longer printing
r
Successfully resumed thread // This was successful since 'foo()' is again printing
foo()
foo()
foo()
foo()
s
Successfully suspended thread // Worked again
k
Successfully terminated thread // Says it works...
r
Successfully resumed thread // Termination must have worked because resuming did not cause 'foo' to start printing
e
waiting to exit main...
exiting...