Defined in header <cstdlib> | ||
|---|---|---|
[[noreturn]] void _Exit( int exit_code ) noexcept; | (since C++11) |
Causes normal program termination to occur without completely cleaning the resources.
Destructors of variables with automatic, thread local and static storage durations are not called. Functions passed to std::at_quick_exit() or std::atexit() are not called. Whether open resources such as files are closed is implementation defined.
If exit_code is 0 or EXIT_SUCCESS, an implementation-defined status indicating successful termination is returned to the host environment. If exit_code is EXIT_FAILURE, an implementation-defined status, indicating unsuccessful termination, is returned. In other cases implementation-defined status value is returned.
| exit_code | - | exit status of the program |
(none).
#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);
}Output:
test
| causes abnormal program termination (without cleaning up) (function) |
|
| causes normal program termination with cleaning up (function) |
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