std::_Exit
性病：[医]出口
| Defined in header | | |
|---|---|---|
| [noreturn] void _Exit( int exit_code | | (since C++11) |
导致正常程序终止而不完全清除资源。
不调用具有自动、线程本地和静态存储时间的变量的析构函数。传递给std::at_quick_exit()或std::atexit()都不叫。是否关闭文件等开放资源是实现定义的。
如果exit_code是0或EXIT_SUCCESS，表示成功终止的实现定义状态返回到主机环境。如果exit_code是EXIT_FAILURE，实现定义的状态，指示不成功终止，返回。在其他情况下，返回实现定义的状态值。
参数
| exit_code | - | exit status of the program |
|---|
返回值
%280%29
例外
noexcept规格：
noexcept
例
二次
#include <iostream>
class Static {
public:
~Static()
{
std::cout << "Static dtor\n";
}
};
class Local {
public:
~Local()
{
std::cout << "Local dtor\n";
}
};
Static static_variable; // dtor of this object will *not* be called
void atexit_handler()
{
std::cout << "atexit handler\n";
}
int main()
{
Local local_variable; // dtor of this object will *not* be called
// handler will *not* be called
const int result = std::atexit(atexit_handler
if (result != 0) {
std::cerr << "atexit registration failed\n";
return EXIT_FAILURE;
}
std::cout << "test" << std::endl; // flush from std::endl
// needs to be here, otherwise nothing will be printed
std::_Exit(EXIT_FAILURE
}
二次
产出：
二次
test
二次
另见
| abort | causes abnormal program termination (without cleaning up) (function) |
|---|---|
| exit | causes normal program termination with cleaning up (function) |
c文件[医]出口
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