72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
|
/*
|
||
|
|
* sched_getscheduler.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
|
||
|
|
sched_getscheduler (pid_t pid)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
if (0 != pid)
|
||
|
|
{
|
||
|
|
int selfPid = (int) GetCurrentProcessId ();
|
||
|
|
|
||
|
|
if (pid != selfPid)
|
||
|
|
{
|
||
|
|
HANDLE h =
|
||
|
|
OpenProcess (PROCESS_QUERY_INFORMATION, PTW32_FALSE, (DWORD) pid);
|
||
|
|
|
||
|
|
if (NULL == h)
|
||
|
|
{
|
||
|
|
errno =
|
||
|
|
(GetLastError () ==
|
||
|
|
(0xFF & ERROR_ACCESS_DENIED)) ? EPERM : ESRCH;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
CloseHandle(h);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return SCHED_OTHER;
|
||
|
|
}
|