Back to index

glibc  2.9
pthread_getschedparam.c File Reference
#include <errno.h>
#include <string.h>
#include "pthreadP.h"
#include <lowlevellock.h>

Go to the source code of this file.


int __pthread_getschedparam (pthread_t threadid, int *policy, struct sched_param *param)

Function Documentation

int __pthread_getschedparam ( pthread_t  threadid,
int policy,
struct sched_param param 

Definition at line 27 of file pthread_getschedparam.c.

  struct pthread *pd = (struct pthread *) threadid;

  /* Make sure the descriptor is valid.  */
  if (INVALID_TD_P (pd))
    /* Not a valid thread handle.  */
    return ESRCH;

  int result = 0;

  lll_lock (pd->lock, LLL_PRIVATE);

  /* The library is responsible for maintaining the values at all
     times.  If the user uses a interface other than
     pthread_setschedparam to modify the scheduler setting it is not
     the library's problem.  In case the descriptor's values have
     not yet been retrieved do it now.  */
  if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
      if (__sched_getparam (pd->tid, &pd->schedparam) != 0)
       result = 1;
       pd->flags |= ATTR_FLAG_SCHED_SET;

  if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
      pd->schedpolicy = __sched_getscheduler (pd->tid);
      if (pd->schedpolicy == -1)
       result = 1;
       pd->flags |= ATTR_FLAG_POLICY_SET;

  if (result == 0)
      *policy = pd->schedpolicy;
      memcpy (param, &pd->schedparam, sizeof (struct sched_param));

  lll_unlock (pd->lock, LLL_PRIVATE);

  return result;

Here is the call graph for this function: