at_quick_exit

 

C

Language

Standard Library

Type support

Dynamic memory management

Error handling

Program utilities

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Thread support (C11)

Atomic operations (C11)

 

Program support utilities

Program termination
abort exit quick_exit (C++11) _Exit (C++11)	atexit at_quick_exit (C++11) EXIT_SUCCESSEXIT_FAILURE
Communicating with the environment
system	getenv
Signals
signal raise sig_atomic_t	SIG_DFLSIG_IGN SIG_ERR
Signal types
SIGABRTSIGFPESIGILLSIGINTSIGSEGVSIGTERM
Non-local jumps
setjmp
longjmp
Types
jmp_buf

 

Defined in header <stdlib.h>
int at_quick_exit( void (*func)() );

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 shall support the registration of at least 32 functions.

Parameters

func

-

pointer to a function to be called on normal program termination

Return value

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

Example

Run this code

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

Output:

pushed second
pushed first

See also

atexit	registers a function to be called on exit() invocation (function)
C++ documentation for at_quick_exit