quick_exit

Defined in header <stdlib.h> 
_Noreturn void quick_exit( int exit_code );
 (since C11)
(until C23) 
[[noreturn]] void quick_exit( int exit_code );
 (since C23)

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

See also

abort
 causes abnormal program termination (without cleaning up)
(function)
atexit
 registers a function to be called on exit() invocation
(function)
at_quick_exit
(C11)
 registers a function to be called on quick_exit invocation
(function)
C++ documentation for quick_exit

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