diff options
| author | rpj <rpj> | 2003-09-18 02:31:39 +0000 |
|---|---|---|
| committer | rpj <rpj> | 2003-09-18 02:31:39 +0000 |
| commit | af1871fba4fc253b5a31e4a0eed667fe79f534d7 (patch) | |
| tree | 1242599d7334ae50c5c05f9b23b52876e4287924 /sched_get_priority_max.c | |
| parent | fac679912b15dd89cafdb09bf873d7eacc80a05e (diff) | |
Cleanup and fixes to thread priority management. Other minor changes.snap-2003-09-18
Diffstat (limited to 'sched_get_priority_max.c')
| -rw-r--r-- | sched_get_priority_max.c | 67 |
1 files changed, 66 insertions, 1 deletions
diff --git a/sched_get_priority_max.c b/sched_get_priority_max.c index a74226a..c3fb715 100644 --- a/sched_get_priority_max.c +++ b/sched_get_priority_max.c @@ -48,6 +48,70 @@ * * sched_get_priority_min() returns 5 * sched_get_priority_max() returns 1 + * + * The following table shows the base priority levels for combinations + * of priority class and priority value in Win32. + * + * Process Priority Class Thread Priority Level + * ----------------------------------------------------------------- + * 1 IDLE_PRIORITY_CLASS THREAD_PRIORITY_IDLE + * 1 BELOW_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_IDLE + * 1 NORMAL_PRIORITY_CLASS THREAD_PRIORITY_IDLE + * 1 ABOVE_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_IDLE + * 1 HIGH_PRIORITY_CLASS THREAD_PRIORITY_IDLE + * 2 IDLE_PRIORITY_CLASS THREAD_PRIORITY_LOWEST + * 3 IDLE_PRIORITY_CLASS THREAD_PRIORITY_BELOW_NORMAL + * 4 IDLE_PRIORITY_CLASS THREAD_PRIORITY_NORMAL + * 4 BELOW_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_LOWEST + * 5 IDLE_PRIORITY_CLASS THREAD_PRIORITY_ABOVE_NORMAL + * 5 BELOW_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_BELOW_NORMAL + * 5 Background NORMAL_PRIORITY_CLASS THREAD_PRIORITY_LOWEST + * 6 IDLE_PRIORITY_CLASS THREAD_PRIORITY_HIGHEST + * 6 BELOW_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_NORMAL + * 6 Background NORMAL_PRIORITY_CLASS THREAD_PRIORITY_BELOW_NORMAL + * 7 BELOW_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_ABOVE_NORMAL + * 7 Background NORMAL_PRIORITY_CLASS THREAD_PRIORITY_NORMAL + * 7 Foreground NORMAL_PRIORITY_CLASS THREAD_PRIORITY_LOWEST + * 8 BELOW_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_HIGHEST + * 8 NORMAL_PRIORITY_CLASS THREAD_PRIORITY_ABOVE_NORMAL + * 8 Foreground NORMAL_PRIORITY_CLASS THREAD_PRIORITY_BELOW_NORMAL + * 8 ABOVE_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_LOWEST + * 9 NORMAL_PRIORITY_CLASS THREAD_PRIORITY_HIGHEST + * 9 Foreground NORMAL_PRIORITY_CLASS THREAD_PRIORITY_NORMAL + * 9 ABOVE_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_BELOW_NORMAL + * 10 Foreground NORMAL_PRIORITY_CLASS THREAD_PRIORITY_ABOVE_NORMAL + * 10 ABOVE_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_NORMAL + * 11 Foreground NORMAL_PRIORITY_CLASS THREAD_PRIORITY_HIGHEST + * 11 ABOVE_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_ABOVE_NORMAL + * 11 HIGH_PRIORITY_CLASS THREAD_PRIORITY_LOWEST + * 12 ABOVE_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_HIGHEST + * 12 HIGH_PRIORITY_CLASS THREAD_PRIORITY_BELOW_NORMAL + * 13 HIGH_PRIORITY_CLASS THREAD_PRIORITY_NORMAL + * 14 HIGH_PRIORITY_CLASS THREAD_PRIORITY_ABOVE_NORMAL + * 15 HIGH_PRIORITY_CLASS THREAD_PRIORITY_HIGHEST + * 15 HIGH_PRIORITY_CLASS THREAD_PRIORITY_TIME_CRITICAL + * 15 IDLE_PRIORITY_CLASS THREAD_PRIORITY_TIME_CRITICAL + * 15 BELOW_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_TIME_CRITICAL + * 15 NORMAL_PRIORITY_CLASS THREAD_PRIORITY_TIME_CRITICAL + * 15 ABOVE_NORMAL_PRIORITY_CLASS THREAD_PRIORITY_TIME_CRITICAL + * 16 REALTIME_PRIORITY_CLASS THREAD_PRIORITY_IDLE + * 17 REALTIME_PRIORITY_CLASS -7 + * 18 REALTIME_PRIORITY_CLASS -6 + * 19 REALTIME_PRIORITY_CLASS -5 + * 20 REALTIME_PRIORITY_CLASS -4 + * 21 REALTIME_PRIORITY_CLASS -3 + * 22 REALTIME_PRIORITY_CLASS THREAD_PRIORITY_LOWEST + * 23 REALTIME_PRIORITY_CLASS THREAD_PRIORITY_BELOW_NORMAL + * 24 REALTIME_PRIORITY_CLASS THREAD_PRIORITY_NORMAL + * 25 REALTIME_PRIORITY_CLASS THREAD_PRIORITY_ABOVE_NORMAL + * 26 REALTIME_PRIORITY_CLASS THREAD_PRIORITY_HIGHEST + * 27 REALTIME_PRIORITY_CLASS 3 + * 28 REALTIME_PRIORITY_CLASS 4 + * 29 REALTIME_PRIORITY_CLASS 5 + * 30 REALTIME_PRIORITY_CLASS 6 + * 31 REALTIME_PRIORITY_CLASS THREAD_PRIORITY_TIME_CRITICAL + * + * Windows NT: Values -7, -6, -5, -4, -3, 3, 4, 5, and 6 are not supported. */ @@ -56,7 +120,8 @@ sched_get_priority_max(int policy) { if (policy < SCHED_MIN || policy > SCHED_MAX) { - return EINVAL; + errno = EINVAL; + return -1; } #if (THREAD_PRIORITY_LOWEST > THREAD_PRIORITY_NORMAL) |