Imported Upstream version 0.13.2+dsfg1

deps/w32-pthreads/pthread_setschedparam.c

@@ -0,0 +1,123 @@
+/*
+ * sched_setschedparam.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) 1999,2005 Pthreads-win32 contributors
+ * 
+ *      Contact Email: rpj@callisto.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.,
+ *      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include "pthread.h"
+#include "implement.h"
+#include "sched.h"
+
+int
+pthread_setschedparam (pthread_t thread, int policy,
+		       const struct sched_param *param)
+{
+  int result;
+
+  /* Validate the thread id. */
+  result = pthread_kill (thread, 0);
+  if (0 != result)
+    {
+      return result;
+    }
+
+  /* Validate the scheduling policy. */
+  if (policy < SCHED_MIN || policy > SCHED_MAX)
+    {
+      return EINVAL;
+    }
+
+  /* Ensure the policy is SCHED_OTHER. */
+  if (policy != SCHED_OTHER)
+    {
+      return ENOTSUP;
+    }
+
+  return (ptw32_setthreadpriority (thread, policy, param->sched_priority));
+}
+
+
+int
+ptw32_setthreadpriority (pthread_t thread, int policy, int priority)
+{
+  int prio;
+  ptw32_mcs_local_node_t threadLock;
+  int result = 0;
+  ptw32_thread_t * tp = (ptw32_thread_t *) thread.p;
+
+  prio = priority;
+
+  /* Validate priority level. */
+  if (prio < sched_get_priority_min (policy) ||
+      prio > sched_get_priority_max (policy))
+    {
+      return EINVAL;
+    }
+
+#if (THREAD_PRIORITY_LOWEST > THREAD_PRIORITY_NORMAL)
+/* WinCE */
+#else
+/* Everything else */
+
+  if (THREAD_PRIORITY_IDLE < prio && THREAD_PRIORITY_LOWEST > prio)
+    {
+      prio = THREAD_PRIORITY_LOWEST;
+    }
+  else if (THREAD_PRIORITY_TIME_CRITICAL > prio
+	   && THREAD_PRIORITY_HIGHEST < prio)
+    {
+      prio = THREAD_PRIORITY_HIGHEST;
+    }
+
+#endif
+
+  ptw32_mcs_lock_acquire (&tp->threadLock, &threadLock);
+
+  /* If this fails, the current priority is unchanged. */
+  if (0 == SetThreadPriority (tp->threadH, prio))
+    {
+      result = EINVAL;
+    }
+  else
+    {
+      /*
+       * Must record the thread's sched_priority as given,
+       * not as finally adjusted.
+       */
+      tp->sched_priority = priority;
+    }
+
+  ptw32_mcs_lock_release (&threadLock);
+
+  return result;
+}