# std::quick_exit

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< cpp‎ | utility‎ | program

Defined in header `<cstdlib>` |  |
[[noreturn]] void quick_exit( int exit_code ) noexcept; |  | (since C++11)

Causes normal program termination to occur without completely cleaning the resources.

Functions passed to std::at_quick_exit are called in reverse order of their registration. If an exception tries to propagate out of any of the functions, std::terminate is called. After calling the registered functions, calls std::_Exit (exit_code).

Functions passed to std::atexit are not called.

### Parameters

exit_code | - | exit status of the program

### Return value

(none)

### Example

Run this code

    #include <cstdlib>
    #include <iostream>

    template<int N>
    void quick_exit_handler()
    {
        std::cout << "quick_exit handler #" << N << std::endl; // flush is intended
    }

    void at_exit_handler()
    {
        std::cout << "at_exit handler\n";
    }

    int main()
    {
        if (std::at_quick_exit(quick_exit_handler<1>) ||
            std::at_quick_exit(quick_exit_handler<2>))
        {
            std::cerr << "Registration failed\n";
            return EXIT_FAILURE;
        }

        std::atexit(at_exit_handler); // the handler will not be called

        struct R { ~R() { std::cout << "destructor\n"; } } resource;

        /*...*/

        std::quick_exit(EXIT_SUCCESS);

        std::cout << "This statement is unreachable...\n";
    }

Output:

    quick_exit handler #2
    quick_exit handler #1

### See also

abort | causes abnormal program termination (without cleaning up) (function)
exit | causes normal program termination with cleaning up (function)
atexit | registers a function to be called on std::exit() invocation (function)
at_quick_exit (C++11) | registers a function to be called on std::quick_exit invocation (function)
C documentation for quick_exit

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