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CLEANUP: global: introduce variable pid_bit to avoid shifts with relative_pid

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At a number of places, bitmasks are used for process affinity and to map
listeners to processes. Every time 1UL<<(relative_pid-1) is used. Let's
create a "pid_bit" variable corresponding to this value to clean this up.
This commit is contained in:
Willy Tarreau 2017-11-10 19:08:14 +01:00
parent 9a398beac3
commit 387bd4f69f
4 changed files with 7 additions and 4 deletions
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1
include/types/global.h
View File

@ -176,6 +176,7 @@ struct global {
extern struct global global;
extern int pid; /* current process id */
extern int relative_pid; /* process id starting at 1 */
extern unsigned long pid_bit; /* bit corresponding to the process id */
extern int actconn; /* # of active sessions */
extern int listeners;
extern int jobs; /* # of active jobs (listeners, sessions, open devices) */

2
src/haproxy.c
View File

@ -118,6 +118,7 @@
static struct list cfg_cfgfiles = LIST_HEAD_INIT(cfg_cfgfiles);
int pid; /* current process id */
int relative_pid = 1; /* process id starting at 1 */
unsigned long pid_bit = 1; /* bit corresponding to the process id */
/* global options */
struct global global = {
@ -2655,6 +2656,7 @@ int main(int argc, char **argv)
shut_your_big_mouth_gcc(write(pidfd, pidstr, strlen(pidstr)));
}
relative_pid++; /* each child will get a different one */
pid_bit <<= 1;
}
#ifdef USE_CPU_AFFINITY

4
src/listener.c
View File

@ -64,7 +64,7 @@ static void enable_listener(struct listener *listener)
if (listener->state == LI_LISTEN) {
if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) &&
listener->bind_conf->bind_proc &&
!(listener->bind_conf->bind_proc & (1UL << (relative_pid - 1)))) {
!(listener->bind_conf->bind_proc & pid_bit)) {
/* we don't want to enable this listener and don't
* want any fd event to reach it.
*/
@ -168,7 +168,7 @@ static int __resume_listener(struct listener *l)
if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) &&
l->bind_conf->bind_proc &&
!(l->bind_conf->bind_proc & (1UL << (relative_pid - 1))))
!(l->bind_conf->bind_proc & pid_bit))
goto end;
if (l->state == LI_ASSIGNED) {

4
src/proxy.c
View File

@ -1431,7 +1431,7 @@ static int dump_servers_state(struct stream_interface *si, struct chunk *buf)
int bk_f_forced_id, srv_f_forced_id;
/* we don't want to report any state if the backend is not enabled on this process */
if (px->bind_proc && !(px->bind_proc & (1UL << (relative_pid - 1))))
if (px->bind_proc && !(px->bind_proc & pid_bit))
return 1;
if (!appctx->ctx.cli.p1)
@ -1546,7 +1546,7 @@ static int cli_io_handler_show_backend(struct appctx *appctx)
continue;
/* we don't want to list a backend which is bound to this process */
if (curproxy->bind_proc && !(curproxy->bind_proc & (1UL << (relative_pid - 1))))
if (curproxy->bind_proc && !(curproxy->bind_proc & pid_bit))
continue;
chunk_appendf(&trash, "%s\n", curproxy->id);