void Writer( void * arg )
{
struct LOCKING_CONTEXT block;
INDEX sequenceIndex=0;
INDEX index;
LockingInit( &block, LockingBlockNonBlocking, LockingWakeNonBlocking );
while(1)
{
ResourceLockExclusive( &BufferLock, &block);
while( !LockingIsAcquired( &block ) );
//resource should be exlusive
ASSERT( BufferLock.State == RESOURCE_EXCLUSIVE );
sequenceIndex++;
sequenceIndex%=SEQUENCE_LENGTH;
for( index = 0; index < BUFFER_SIZE; index++ )
{
Buffer[index] = index + Sequence[ sequenceIndex ] ;
}
ResourceUnlockExclusive( &BufferLock );
SchedulerStartCritical();
TimesWritten++;
SchedulerForceSwitch();
}
}
void WorkerInitItem( struct WORKER_QUEUE * queue, WORKER_FUNCTION foo, void * context, struct WORKER_ITEM * item )
{
//Its assumed that the caller of WorkerInitItem is the sole owner of the item
//at the time it is called. This means we dont have to disable interrupts around
//the init code.
item->Foo = foo;
LockingInit( &item->LockingContext, WorkerBlockOnLock, WorkerWakeOnLock );
item->Context = context;
//Now we are going to insert the work item into the list.
WorkerAddItem(queue, item );
}
