markus/trx
1
0
Fork 0
mirror of http://www.pogo.org.uk/~mark/trx.git synced 2024-11-23 10:55:05 +01:00
Code Issues Releases Wiki Activity

Do not use the ambiguous sched_setscheduler()

Browse Source 
POSIX specifies this is per-process, and GNU implemented it on the
thread. Musl realises the problem with this and so doesn't implement
it at all, forcing this more specific alternative to be used.
This commit is contained in:
Mark Hills 2023-05-12 16:31:03 +01:00
parent 5c844e6996
commit 0c5ab0dfc1
1 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
sched.c
View File

@ -17,6 +17,8 @@
* *
*/ */
#include <errno.h>
#include <pthread.h>
#include <sched.h> #include <sched.h>
#include <stdio.h> #include <stdio.h>
#include <unistd.h> #include <unistd.h>
@ -28,23 +30,20 @@
int go_realtime(void) int go_realtime(void)
{ {
int max_pri; int max_pri;
struct sched_param sp; const struct sched_param sp = {
.sched_priority = REALTIME_PRIORITY,
if (sched_getparam(0, &sp)) { };
perror("sched_getparam");
return -1;
}
max_pri = sched_get_priority_max(SCHED_FIFO); max_pri = sched_get_priority_max(SCHED_FIFO);
sp.sched_priority = REALTIME_PRIORITY;
if (sp.sched_priority > max_pri) { if (sp.sched_priority > max_pri) {
fprintf(stderr, "Invalid priority (maximum %d)\n", max_pri); fprintf(stderr, "Invalid priority (maximum %d)\n", max_pri);
return -1; return -1;
} }
if (sched_setscheduler(0, SCHED_FIFO, &sp)) { errno = pthread_setschedparam(pthread_self(), SCHED_FIFO, &sp);
perror("sched_setscheduler"); if (errno) {
perror("pthread_setschedparam");
return -1; return -1;
} }