at_quick_exit
From cppreference.com
| 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.
Parameters
| func | - | pointer to a function to be called on quick program termination |
Return value
0 if the registration succeeds, nonzero value otherwise.
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
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)
See also
| causes abnormal program termination (without cleaning up) (function) | |
| causes normal program termination with cleaning up (function) | |
| registers a function to be called on exit() invocation (function) | |
| (C11) |
causes normal program termination without completely cleaning up (function) |
| C++ documentation for at_quick_exit
| |