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Using linux soft realtime priority for Sys.REALTIME_PRIORITY

This commit is contained in:
Elias Naur 2002-11-22 11:35:03 +00:00
parent 23fe6a9e8f
commit 8c446aa6ce
1 changed files with 32 additions and 3 deletions
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35
src/native/linux/org_lwjgl_Sys.cpp
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@ -39,6 +39,7 @@
* @version $Revision$
*/
#include <sched.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "org_lwjgl_Sys.h"
@ -130,12 +131,40 @@ JNIEXPORT void JNICALL Java_org_lwjgl_Sys_setProcessPriority
(JNIEnv * env, jclass clazz, jint priority)
{
int linux_priority;
int max_pri, min_pri;
struct sched_param sched_pri;
if (sched_getscheduler(0) != SCHED_OTHER) {
// Reset scheduler to normal
sched_pri.sched_priority = 0;
if (sched_setscheduler(0, SCHED_OTHER, &sched_pri) != 0) {
#ifdef _DEBUG
printf("Could not set realtime priority\n");
#endif
return;
}
}
switch (priority) {
case org_lwjgl_Sys_REALTIME_PRIORITY:
linux_priority = -20;
break;
min_pri = sched_get_priority_min(SCHED_FIFO);
max_pri = sched_get_priority_max(SCHED_FIFO);
if (min_pri == -1 || max_pri == -1) {
#ifdef _DEBUG
printf("Failed to set realtime priority\n");
#endif
return;
}
sched_pri.sched_priority = (max_pri + min_pri)/2;
if (sched_setscheduler(0, SCHED_FIFO, &sched_pri) != 0) {
#ifdef _DEBUG
printf("Could not set realtime priority\n");
#endif
return;
}
return;
case org_lwjgl_Sys_HIGH_PRIORITY:
linux_priority = -10;
linux_priority = -20;
break;
case org_lwjgl_Sys_NORMAL_PRIORITY:
linux_priority = 0;