1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/****************************************************************
* *
* Copyright (c) 2011-2018 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#ifndef FORK_INIT_H_INCLUDED
#define FORK_INIT_H_INCLUDED
#include "have_crit.h"
/* This macro takes care of safely clearing the timer queue and resetting the timer-related globals when we need
* to fork-off a process. Note that it is necessary to use this macro EVEN WHEN the fork is immediately followed
* by an exec (of any flavor), because of the ENABLE_INTERRUPTS macro usage right after the "fork" call.
* If this call is done in the child process (0 == pid), and timer variables are not cleared, it is possible
* (if the right conditions are met) that "have_crit" gets invoked as part of the ENABLE_INTERRUPTS macro in
* the child process and ends up with a GTMASSERT -- BYPASSOK -- (GTM-8050). If timers have not been initialized at all,
* then "clear_timers" does no system calls so the only overhead is a function call invocation which is okay considering
* we anyways have invoked the "fork()" system call just now.
*/
#define FORK(pid) \
{ \
intrpt_state_t prev_intrpt_state; \
\
DEFER_INTERRUPTS(INTRPT_IN_FORK_OR_SYSTEM, prev_intrpt_state) \
pid = fork(); \
if (0 == pid) \
clear_timers(); \
ENABLE_INTERRUPTS(INTRPT_IN_FORK_OR_SYSTEM, prev_intrpt_state) \
}
#endif
|
