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std::quick_exit

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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.

Contents

[edit] Parameters

exit_code - exit status of the program

[edit] Return value

(none)

[edit] Example

#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> ) or
         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

[edit] See also

causes abnormal program termination (without cleaning up)
(function) [edit]
causes normal program termination with cleaning up
(function) [edit]
registers a function to be called on std::exit() invocation
(function) [edit]
registers a function to be called on std::quick_exit invocation
(function) [edit]
C documentation for quick_exit