std::_Exit

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical Specifications

 

Utilities library

Type support (basic types, RTTI, type traits)

Dynamic memory management

Error handling

Program utilities

Variadic functions

Date and time

Function objects

initializer_list (C++11)

bitset

hash (C++11)

Relational operators

rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=

Pairs and tuples

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

integer_sequence (C++14)

Swap, forward and move

swap

exchange (C++14)

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Program support utilities

Program termination
abort exit quick_exit (C++11) _Exit (C++11)	atexit at_quick_exit (C++11) EXIT_SUCCESSEXIT_FAILURE
Communicating with the environment
system	getenv
Signals
signal raise sig_atomic_t	SIG_DFLSIG_IGN SIG_ERR
Signal types
SIGABRTSIGFPESIGILLSIGINTSIGSEGVSIGTERM
Non-local jumps
setjmp
longjmp
Types
jmp_buf

 

Defined in header <cstdlib>
[[noreturn]] void _Exit( int exit_code );		(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 EXIT_FAILURE, an implementation-defined status, indicating unsuccessful termination, is returned. In other cases implementation-defined status value is returned.

Parameters

exit_code

-

exit status of the program

Return value

(none)

Exceptions

noexcept specification:  

noexcept

  

Example

Run this code

#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

See also

abort	causes abnormal program termination (without cleaning up) (function)
exit	causes normal program termination with cleaning up (function)
C documentation for _Exit