summaryrefslogtreecommitdiff
path: root/sched_get_priority_max.c
diff options
context:
space:
mode:
authorrpj <rpj>2002-02-18 03:16:52 +0000
committerrpj <rpj>2002-02-18 03:16:52 +0000
commita416ab17ecf9f2cb0f1e3f7bd645a8d1ce690ca2 (patch)
tree72f776cd64e48824a5578ff7a523bc69097143b4 /sched_get_priority_max.c
parente6f1797e9e9925ae7f9dda54806ef8f52ae3ed07 (diff)
Major reorganisation of source code; new routine and tests added.
Diffstat (limited to 'sched_get_priority_max.c')
-rw-r--r--sched_get_priority_max.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/sched_get_priority_max.c b/sched_get_priority_max.c
new file mode 100644
index 0000000..8bffa64
--- /dev/null
+++ b/sched_get_priority_max.c
@@ -0,0 +1,69 @@
+/*
+ * sched_get_priority_max.c
+ *
+ * Description:
+ * POSIX thread functions that deal with thread scheduling.
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Pthreads-win32 - POSIX Threads Library for Win32
+ * Copyright(C) 1998 John E. Bossom
+ * Copyright(C) 1999,2002 Pthreads-win32 contributors
+ *
+ * Contact Email: rpj@ise.canberra.edu.au
+ *
+ * The current list of contributors is contained
+ * in the file CONTRIBUTORS included with the source
+ * code distribution. The list can also be seen at the
+ * following World Wide Web location:
+ * http://sources.redhat.com/pthreads-win32/contributors.html
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library in the file COPYING.LIB;
+ * if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include "pthread.h"
+#include "implement.h"
+#include "sched.h"
+
+/*
+ * On Windows98, THREAD_PRIORITY_LOWEST is (-2) and
+ * THREAD_PRIORITY_HIGHEST is 2, and everything works just fine.
+ *
+ * On WinCE 3.0, it so happen that THREAD_PRIORITY_LOWEST is 5
+ * and THREAD_PRIORITY_HIGHEST is 1 (yes, I know, it is funny:
+ * highest priority use smaller numbers) and the following happens:
+ *
+ * sched_get_priority_min() returns 5
+ * sched_get_priority_max() returns 1
+ */
+
+
+int
+sched_get_priority_max(int policy)
+{
+ if (policy < SCHED_MIN || policy > SCHED_MAX)
+ {
+ return EINVAL;
+ }
+
+#if (THREAD_PRIORITY_LOWEST > THREAD_PRIORITY_NORMAL)
+ /* WinCE? */
+ return PTW32_MAX(THREAD_PRIORITY_IDLE, THREAD_PRIORITY_TIME_CRITICAL);
+#else
+ /* This is independent of scheduling policy in Win32. */
+ return PTW32_MAX(THREAD_PRIORITY_IDLE, THREAD_PRIORITY_TIME_CRITICAL);
+#endif
+}