at_quick_exit
From cppreference.com
C
Concurrency support (C11)
Program support utilities
Program termination
Unreachable control flow
(C23)
Communicating with the environment
(C11)
Memory alignment query
(C23)
Signals
Signal types
Non-local jumps
Types
Defined in header
<stdlib.h>
int at_quick_exit( void (*func)(void) );
(since C11)
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.
[edit] Parameters
func
-
pointer to a function to be called on quick program termination
[edit] Return value
0 if the registration succeeds, nonzero value otherwise.
[edit] Example
Run this code
#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); }
Output:
pushed second pushed first
[edit] References
- C17 standard (ISO/IEC 9899:2018):
- 7.22.4.3 The at_quick_exit function (p: 255)
- C11 standard (ISO/IEC 9899:2011):
- 7.22.4.3 The at_quick_exit function (p: 351)
[edit] See also
C++ documentation for at_quick_exit