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authorrpj <rpj>2003-09-18 02:31:39 +0000
committerrpj <rpj>2003-09-18 02:31:39 +0000
commitaf1871fba4fc253b5a31e4a0eed667fe79f534d7 (patch)
tree1242599d7334ae50c5c05f9b23b52876e4287924 /sched_get_priority_max.c
parentfac679912b15dd89cafdb09bf873d7eacc80a05e (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.c67
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)