std::_Exit
<cstdlib>
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 0 or EXIT_SUCCESS , an implementation-defined status indicating successful termination is returned to the host environment. If exit_code is EXIT_FAILURE , an implementation-defined status, indicating unsuccessful termination, is returned. In other cases implementation-defined status value is returned.
A freestanding implementation is required to provide std::_Exit.
Contents
[edit] Parameters
[edit] Return value
(none)
[edit] Notes
Although _Exit is required to be freestanding since C++23, it is not required to be available in a freestanding C implementation.
[edit] 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