quick_exit

From cppreference.com
< c‎ | program
Defined in header <stdlib.h>
_Noreturn void quick_exit( int exit_code );
(since C11)

Causes normal program termination to occur without completely cleaning the resources.

Functions passed to at_quick_exit are called in reverse order of their registration. After calling the registered functions, calls _Exit(exit_code).

Functions passed to atexit or signal handlers passed to signal are not called.

Parameters

exit_code - exit status of the program

Return value

(none)

Example

#include <stdlib.h>
#include <stdio.h>
 
void f1(void)
{
    puts("pushed first");
    fflush(stdout);
}
 
void f2(void)
{
    puts("pushed second");
}
 
void f3(void)
{
    puts("won't be called");
}
 
int main(void)
{
    at_quick_exit(f1);
    at_quick_exit(f2);
    atexit(f3);
    quick_exit(0);
}

Output:

pushed second
pushed first

References

  • C17 standard (ISO/IEC 9899:2018):
  • 7.22.4.7 The quick_exit function (p: 257)
  • C11 standard (ISO/IEC 9899:2011):
  • 7.22.4.7 The quick_exit function (p: 353)

See also

causes abnormal program termination (without cleaning up)
(function)
registers a function to be called on exit() invocation
(function)
registers a function to be called on quick_exit invocation
(function)