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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /*
  *  COPYRIGHT (c) 1989-2013.
  *  On-Line Applications Research Corporation (OAR).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 #include <errno.h>
 #include <timesys.h>
 #include <tmacros.h>
 #include <sched.h>
 #include <pthread.h>
 #include <rtems/btimer.h>
 #include "test_support.h"
 
 const char rtems_test_name[] = "PSXTMRWLOCK 04";
 
 /* forward declarations to avoid warnings */
 void *POSIX_Init(void *argument);
 void *Middle(void *argument);
 void *Low(void *argument);
 
 pthread_rwlock_t     rwlock;
 
 void *Low(
   void *argument
 )
 {
   benchmark_timer_t end_time;
 
   /*
    * Now we have finished the thread startup overhead,
    * so let other threads run.  When we return, we can
    * finish the benchmark.
    */
   sched_yield();
     /* let other threads run */
 
   end_time = benchmark_timer_read();
 
   put_time(
     "pthread_rwlock_wrlock: not available blocks",
     end_time,
     OPERATION_COUNT,
     0,
     0
   );
 
   TEST_END();
 
   rtems_test_exit( 0 );
   return NULL;
 }
 
 void *Middle(
   void *argument
 )
 {
   int status;
 
   /*
    * Now we have finished the thread startup overhead,
    * so let other threads run.  When we return, we can
    * finish the benchmark.
    */
   sched_yield();
     /* let other threads run */
 
   /* this write lock operation will be blocked 
    * cause another write operation has the lock */
     status = pthread_rwlock_wrlock(&rwlock);
   rtems_test_assert( status == 0 );
   return NULL;
 }
 
 void *POSIX_Init(
   void *argument
 )
 {
   int        i;
   int        status;
   pthread_t  threadId;
   pthread_rwlockattr_t attr;
 
   TEST_BEGIN();
 
   for ( i=0 ; i < OPERATION_COUNT - 1 ; i++ ) {
     status = pthread_create( &threadId, NULL, Middle, NULL );
     rtems_test_assert( !status );
   }
   
   status = pthread_create( &threadId, NULL, Low, NULL );
   rtems_test_assert( !status );
 
   /*
    * Deliberately create the rwlock after the threads.  This way if the
    * threads do run before we intend, they will get an error.
    */
   status = pthread_rwlockattr_init( &attr );
   rtems_test_assert( status == 0 );
     status = pthread_rwlock_init( &rwlock, &attr );
   rtems_test_assert( status == 0 );
   /*
    * Let the other threads start so the thread startup overhead,
    * is accounted for.  When we return, we can start the benchmark.
    */
   sched_yield();
     /* let other threads run */
   
   /* start the timer and switch through all the other tasks */
   benchmark_timer_initialize();
   /* write lock operation */
     status = pthread_rwlock_wrlock(&rwlock);
   rtems_test_assert( status == 0 );
   return NULL;
 }
 
 /* configuration information */
 
 #define CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER
 #define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER
 
 #define CONFIGURE_MAXIMUM_POSIX_THREADS     OPERATION_COUNT + 2
 #define CONFIGURE_POSIX_INIT_THREAD_TABLE
 
 #define CONFIGURE_INIT
 
 #include <rtems/confdefs.h>
 /* end of file */

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