/*
 * File: priority2.c
 *
 * Test Synopsis:
 * - Test thread priority setting after creation.
 *
 * Test Method (Validation or Falsification):
 * - 
 *
 * Requirements Tested:
 * -
 *
 * Features Tested:
 * -
 *
 * Cases Tested:
 * -
 *
 * Description:
 * -
 *
 * Environment:
 * -
 *
 * Input:
 * - None.
 *
 * Output:
 * - File name, Line number, and failed expression on failure.
 * - No output on success.
 *
 * Assumptions:
 * -
 *
 * Pass Criteria:
 * - Process returns zero exit status.
 *
 * Fail Criteria:
 * - Process returns non-zero exit status.
 */

#include "test.h"

enum {
  PTW32TEST_THREAD_INIT_PRIO = 0,
  PTW32TEST_MAXPRIORITIES = 512
};

int minPrio;
int maxPrio;
int validPriorities[PTW32TEST_MAXPRIORITIES];
pthread_mutex_t startMx = PTHREAD_MUTEX_INITIALIZER;

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

  assert(pthread_mutex_lock(&startMx) == 0);
  assert(pthread_getschedparam(pthread_self(), &policy, &param) == 0);
  assert(pthread_mutex_unlock(&startMx) == 0);
  assert(policy == SCHED_OTHER);
  return (void *) param.sched_priority;
}

 
void *
getValidPriorities(void * arg)
{
  int prioSet;
  pthread_t threadID = pthread_self();
  HANDLE threadH = pthread_getw32threadhandle_np(threadID);

  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.
       */
	SetThreadPriority(threadH, PTW32TEST_THREAD_INIT_PRIO);
	SetThreadPriority(threadH, prioSet);
	validPriorities[prioSet+(PTW32TEST_MAXPRIORITIES/2)] = GetThreadPriority(threadH);
    }

  return (void *) 0;
}


int
main()
{
  pthread_t t;
  void * result = NULL;
  struct sched_param param;

  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);

  /* Set the thread's priority to a known initial value.
   * If the new priority is invalid then the threads priority
   * is unchanged from the previous value.
   */
  SetThreadPriority(pthread_getw32threadhandle_np(pthread_self()),
                    PTW32TEST_THREAD_INIT_PRIO);

  for (param.sched_priority = minPrio;
       param.sched_priority <= maxPrio;
       param.sched_priority++)
    {
      assert(pthread_mutex_lock(&startMx) == 0);
      assert(pthread_create(&t, NULL, func, NULL) == 0);
      assert(pthread_setschedparam(t, SCHED_OTHER, &param) == 0);
      assert(pthread_mutex_unlock(&startMx) == 0);
      pthread_join(t, &result);
      assert((int) result ==
	  validPriorities[param.sched_priority+(PTW32TEST_MAXPRIORITIES/2)]);
    }

  return 0;
}