int main( int argc, char *argv[] )
{
Huint mid;
Huint sta;
// Set the mutexes to fast locking semantics
setkind( HTHREAD_MUTEX_ERRORCHECK_NP );
// Print out a banner for the first attempt
printf( "----------------------------------------------------------------------\n" );
printf( "- Error Lock: First Lock Attempt -\n" );
printf( "----------------------------------------------------------------------\n" );
// Lock all of the mutexes
for( mid = 0; mid < MUTEX_MAX; mid++ )
{
// Attempt to acquire the mutex for thread id 0
sta = _mutex_acquire( 0, mid );
// Print out the status information that was returned
printf( "LOCK: (MID=%d) (STA=0x%8.8x)\n", mid, sta );
}
// Print out a banner for the second attempt
printf( "----------------------------------------------------------------------\n" );
printf( "- Error Lock: Second Lock Attempt -\n" );
printf( "----------------------------------------------------------------------\n" );
// Try to lock all of the mutexes again
for( mid = 0; mid < MUTEX_MAX; mid++ )
{
// Attempt to acquire the mutex for thread id 0
sta = _mutex_acquire( 0, mid );
// Print out the status information that was returned
printf( "LOCK: (MID=%d) (STA=0x%8.8x)\n", mid, sta );
}
// Finish the program
printf( "-- QED --\n" );
return 1;
}
void lock( void )
{
Huint mid;
Huint sta;
// Lock all of the mutexes
for( mid = 0; mid < MUTEX_MAX; mid++ )
{
// Attempt to acquire the mutex for thread id 0
sta = _mutex_acquire( mid, mid );
// Print out the status information that was returned
//printf( "LOCK: (MID=%d) (STA=0x%8.8x)\n", mid, sta );
}
}
/** \internal
* \brief Acquire a mutex lock.
*
* \author Wesley Peck <*****@*****.**>
*
* This function is used to acquire a lock for the given mutex.
*
* \param mutex The mutex to acquire the lock for.
*/
Hint _syscall_mutex_lock( hthread_mutex_t *mutex )
{
Huint cur;
Hint sta;
// Print out a trace message about this system call
TRACE_PRINTF( TRACE_FINE, TRACE_SYSCALL, "SYSCALL: (OP=LOCK) (MTX=%d)\n", (Huint)mutex->num );
cur = _current_thread();
sta = _mutex_acquire( cur, mutex->num );
// Print out a trace message about this system call
TRACE_PRINTF( TRACE_FINE, TRACE_SYSCALL, "SYSCALL DONE: (OP=LOCK) (MTX=%d) (CUR=%u) (STA=%8.8X)\n", (Huint)mutex->num, cur, sta );
if( sta == HT_MUTEX_BLOCK )
{
_run_sched( Htrue );
return SUCCESS;
}
if( sta == SUCCESS ) return SUCCESS;
else return FAILURE;
}
