at_quick_exit

Registers the function pointed to by func to be called on quick program termination (via quick_exit ).

Calling the function from several threads does not induce a data race. The implementation is guaranteed to support the registration of at least 32 functions. The exact limit is implementation-defined.

The registered functions will not be called on normal program termination . If a function need to be called in that case, atexit must be used.

Parameters

Return value

​ 0 ​ if the registration succeeds, nonzero value otherwise.

Example

#include <stdlib.h>
#include <stdio.h>
 
void f1(void)
{
    puts("pushed first");
    fflush(stdout);
}
 
void f2(void)
{
    puts("pushed second");
}
 
int main(void)
{
    at_quick_exit(f1);
    at_quick_exit(f2);
    quick_exit(0);
}

pushed second
pushed first

References

See also