sched_getaffinity.c 1.6 KB

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  1. /* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #include <features.h>
  16. #ifdef __USE_GNU
  17. #include <sched.h>
  18. #include <sys/types.h>
  19. #include <sys/syscall.h>
  20. #include <string.h>
  21. #include <sys/param.h>
  22. #if defined __NR_sched_getaffinity
  23. #define __NR___syscall_sched_getaffinity __NR_sched_getaffinity
  24. static __inline__ _syscall3(int, __syscall_sched_getaffinity, __kernel_pid_t, pid,
  25. size_t, cpusetsize, cpu_set_t *, cpuset)
  26. int sched_getaffinity(pid_t pid, size_t cpusetsize, cpu_set_t *cpuset)
  27. {
  28. int res = (__syscall_sched_getaffinity(pid, MIN(INT_MAX, cpusetsize),
  29. cpuset));
  30. if (res != -1) {
  31. /* Clean the rest of the memory the kernel didn't do. */
  32. memset ((char *) cpuset + res, '\0', cpusetsize - res);
  33. res = 0;
  34. }
  35. return res;
  36. }
  37. #endif
  38. #endif