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std::quick_exit(3) C++ Standard Libary std::quick_exit(3)

NAME

std::quick_exit - std::quick_exit

Synopsis


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 registers a function to be called on std::quick_exit invocation
(C++11) (function)
C documentation for
quick_exit

2024.06.10 http://cppreference.com