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std::_Exit

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< cpp‎ | utility‎ | program
Revision as of 13:16, 10 September 2013 by P12 (Talk | contribs)

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.

Contents

Parameters

exit_code - exit status of the program

Return value

(none)

Exceptions

(none) (until C++11)
noexcept specification:  
noexcept
  
(since C++11)

Example

#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

causes abnormal program termination (without cleaning up)
(function) [edit]
causes normal program termination with cleaning up
(function) [edit]
C documentation for _Exit