Exemplo n.º 1
0
void* cas_thread( object_t thread, void* arg )
{
    int loop = 0;
    cas_value_t val = *(cas_value_t*)arg;

    thread_sleep( 10 );

    while( !thread_should_terminate( thread ) && ( loop < 65535 ) )
    {
        while( !atomic_cas32( &val_32, val.val_32, 0 ) )
            thread_yield();
        while( !atomic_cas32( &val_32, 0, val.val_32 ) )
            thread_yield();
        while( !atomic_cas64( &val_64, val.val_64, 0 ) )
            thread_yield();
        while( !atomic_cas64( &val_64, 0, val.val_64 ) )
            thread_yield();
        while( !atomic_cas_ptr( &val_ptr, val.val_ptr, 0 ) )
            thread_yield();
        while( !atomic_cas_ptr( &val_ptr, 0, val.val_ptr ) )
            thread_yield();

        ++loop;
        thread_yield();
    }
    return 0;
}
Exemplo n.º 2
0
static void*
cas_thread(void* arg) {
	unsigned int loop = 0;
	cas_value_t val = *(cas_value_t*)arg;

	thread_sleep(10);

	while (!thread_try_wait(0) && (loop < 65535)) {
		while (!atomic_cas32(&val_32, val.val_32, 0))
			thread_yield();
		while (!atomic_cas32(&val_32, 0, val.val_32))
			thread_yield();
		while (!atomic_cas64(&val_64, val.val_64, 0))
			thread_yield();
		while (!atomic_cas64(&val_64, 0, val.val_64))
			thread_yield();
		while (!atomic_cas_ptr(&val_ptr, val.val_ptr, 0))
			thread_yield();
		while (!atomic_cas_ptr(&val_ptr, 0, val.val_ptr))
			thread_yield();

		++loop;
		thread_yield();
	}
	return 0;
}
Exemplo n.º 3
0
object_t objectmap_reserve( objectmap_t* map )
{
	uint64_t idx, next, id;

	FOUNDATION_ASSERT( map ); /*lint -esym(613,pool) */
	
	//Reserve spot in array
	//TODO: Look into double-ended implementation with allocation from tail and free push to head
	do
	{
		idx = atomic_load64( &map->free );
		if( idx >= map->size )
		{
			log_error( 0, ERROR_OUT_OF_MEMORY, "Pool full, unable to reserve id" );
			return 0;
		}
		next = ((uintptr_t)map->map[idx]) >> 1;
	} while( !atomic_cas64( &map->free, next, idx ) );
	
	//Sanity check that slot isn't taken
	FOUNDATION_ASSERT_MSG( (intptr_t)(map->map[idx]) & 1, "Map failed sanity check, slot taken after reserve" );
	map->map[idx] = 0;
	
	//Allocate ID
	id = 0;
	do
	{
		id = atomic_incr64( &map->id ) & map->id_max; //Wrap-around handled by masking
	} while( !id );

	//Make sure id stays within correct bits (if fails, check objectmap allocation and the mask setup there)
	FOUNDATION_ASSERT( ( ( id << map->size_bits ) & map->mask_id ) == ( id << map->size_bits ) );
	
	return ( id << map->size_bits ) | idx; /*lint +esym(613,pool) */
}
Exemplo n.º 4
0
void objectmap_free( objectmap_t* map, object_t id )
{
	uint64_t idx, last;

	FOUNDATION_ASSERT( map ); /*lint -esym(613,pool) */
	
	idx = (intptr_t)( id & map->mask_index );
	if( (uintptr_t)map->map[idx] & 1 )
		return; //Already free

	do
	{
		last = atomic_load64( &map->free );
		map->map[idx] = (void*)((uintptr_t)(last<<1)|1);
	} while( !atomic_cas64( &map->free, idx, last ) ); /*lint +esym(613,pool) */
}