| /* |
| * 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; |
| } |
| } |
| } |
| |
| 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; |
| } |