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> ) 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

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)