mingw-w64-libraries/winpthreads/tests/pthread_misc/inherit1.c

#include "test.h"

enum {
  PTW32TEST_THREAD_INIT_PRIO = 0,
  PTW32TEST_MAXPRIORITIES = 512
};

int minPrio;
int maxPrio;
int validPriorities[PTW32TEST_MAXPRIORITIES];


void * func(void * arg)
{
  int policy;
  struct sched_param param;

  assert(pthread_getschedparam(pthread_self(), &policy, &param) == 0);
  return (void *) (size_t) param.sched_priority;
}


void *
getValidPriorities(void * arg)
{
  int prioSet;
  pthread_t thread = pthread_self();
  HANDLE threadH = pthread_getw32threadhandle_np(thread);
  struct sched_param param;

  for (prioSet = minPrio;
       prioSet <= maxPrio;
       prioSet++)
    {
        /*
       * If prioSet is invalid then the threads priority is unchanged
       * from the previous value. Make the previous value a known
       * one so that we can check later.
       */
        param.sched_priority = prioSet;
        assert(pthread_setschedparam(thread, SCHED_OTHER, &param) == 0);
        validPriorities[prioSet+(PTW32TEST_MAXPRIORITIES/2)] = GetThreadPriority(threadH);
    }

  return (void *) 0;
}


int
main()
{
  pthread_t t;
  pthread_t mainThread = pthread_self();
  pthread_attr_t attr;
  void * result = NULL;
  struct sched_param param;
  struct sched_param mainParam;
  int prio;
  int policy;
  int inheritsched = -1;
  pthread_t threadID = pthread_self();
  HANDLE threadH = pthread_getw32threadhandle_np(threadID);

  assert((maxPrio = sched_get_priority_max(SCHED_OTHER)) != -1);
  assert((minPrio = sched_get_priority_min(SCHED_OTHER)) != -1);

  assert(pthread_create(&t, NULL, getValidPriorities, NULL) == 0);
  assert(pthread_join(t, &result) == 0);

  assert(pthread_attr_init(&attr) == 0);
  assert(pthread_attr_setinheritsched(&attr, PTHREAD_INHERIT_SCHED) == 0);
  assert(pthread_attr_getinheritsched(&attr, &inheritsched) == 0);
  assert(inheritsched == PTHREAD_INHERIT_SCHED);

  for (prio = minPrio; prio <= maxPrio; prio++)
    {
      mainParam.sched_priority = prio;

      /* Set the thread's priority to a known initial value. */
      SetThreadPriority(threadH, PTW32TEST_THREAD_INIT_PRIO);

      /* Change the main thread priority */
      assert(pthread_setschedparam(mainThread, SCHED_OTHER, &mainParam) == 0);
      assert(pthread_getschedparam(mainThread, &policy, &mainParam) == 0);
      assert(policy == SCHED_OTHER);
      /* Priority returned below should be the level set by pthread_setschedparam(). */
      assert(mainParam.sched_priority == prio);
      assert(GetThreadPriority(threadH) ==
               validPriorities[prio+(PTW32TEST_MAXPRIORITIES/2)]);
      if (prio > minPrio && validPriorities[prio+(PTW32TEST_MAXPRIORITIES/2)] ==
	validPriorities[prio-1+(PTW32TEST_MAXPRIORITIES/2)])
	continue;
      for (param.sched_priority = prio;
           param.sched_priority <= maxPrio;
           param.sched_priority++)
        {
          /* The new thread create should ignore this new priority */
          assert(pthread_attr_setschedparam(&attr, &param) == 0);
          assert(pthread_create(&t, &attr, func, NULL) == 0);
          pthread_join(t, &result);
          assert(((int) (size_t) result) == mainParam.sched_priority);
        }
	fprintf(stderr, "."); fflush(stderr);
    }

  return 0;
}