From 2ab3d99967d68c79351fe2a3df22c445447e3010 Mon Sep 17 00:00:00 2001
From: Michał Cichoń <michcic@gmail.com>
Date: Tue, 15 Nov 2011 22:28:48 +0100
Subject: Initial import.

---
 pthreads/src/sched_setscheduler.c | 83 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 pthreads/src/sched_setscheduler.c

(limited to 'pthreads/src/sched_setscheduler.c')

diff --git a/pthreads/src/sched_setscheduler.c b/pthreads/src/sched_setscheduler.c
new file mode 100644
index 0000000..8691316
--- /dev/null
+++ b/pthreads/src/sched_setscheduler.c
@@ -0,0 +1,83 @@
+/*
+ * sched_setscheduler.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.,
+ *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include "pthread.h"
+#include "implement.h"
+#include "sched.h"
+
+int
+sched_setscheduler (pid_t pid, int policy)
+{
+  /*
+   * Win32 only has one policy which we call SCHED_OTHER.
+   * However, we try to provide other valid side-effects
+   * such as EPERM and ESRCH errors. Choosing to check
+   * for a valid policy last allows us to get the most value out
+   * of this function.
+   */
+  if (0 != pid)
+    {
+      int selfPid = (int) GetCurrentProcessId ();
+
+      if (pid != selfPid)
+	{
+	  HANDLE h =
+	    OpenProcess (PROCESS_SET_INFORMATION, PTW32_FALSE, (DWORD) pid);
+
+	  if (NULL == h)
+	    {
+	      errno =
+		(GetLastError () ==
+		 (0xFF & ERROR_ACCESS_DENIED)) ? EPERM : ESRCH;
+	      return -1;
+	    }
+	  else
+	    CloseHandle(h);
+	}
+    }
+
+  if (SCHED_OTHER != policy)
+    {
+      errno = ENOSYS;
+      return -1;
+    }
+
+  /*
+   * Don't set anything because there is nothing to set.
+   * Just return the current (the only possible) value.
+   */
+  return SCHED_OTHER;
+}
-- 
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