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kQueue Class Reference

Description

Represents a FIFO queue implemented with a dynamic array.

The kQueue class represents a dynamic, array-based queue of objects or values. The kQueue constructor accepts a kType value that determines the type of items that will be stored in the queue. The queue will automatically grow as new items are added.

kStatus QueueExample()
{
k32s values[] = { 1, 2, 3, 5, 7, 9 };
kSize i;
{
//create a queue that can store 32-bit integers
kTest(kQueue_Construct(&queue, kTypeOf(k32s), 0, kNULL));
//add some initial items to the queue
for (i = 0; i < kCountOf(values); ++i)
{
kTest(kQueue_Add(queue, &values[i]);
}
//print some information about the queue and its items
printf("Item type: %s\n", kType_Name(kQueue_ItemType(queue)));
printf("Count: %u\n", (k32u) kQueue_Count(queue));
for (i = 0; i < kQueue_Count(queue); ++i)
{
//the kQueue_As_ macro can be used to get a queue item and cast it to the desired type;
//this is equivalent to *(k32s*)kQueue_At(queue, i);
k32s value = kQueue_As_(queue, i, k32s);
printf("Item %u: %d\n", (k32u)i, value);
}
}
{
kObject_Destroy(queue);
}
return kOK;
}

For queues that contain objects (e.g. kImage) as opposed to values (e.g. k32s), the objects are not automatically destroyed when the queue is destroyed. To recursively destroy both the queue and the queue items, use kObject_Dispose.

kQueue supports the kObject_Clone, kObject_Dispose, and kObject_Size methods.

kQueue supports the kdat5 and kdat6 serialization protocols.

Inheritance diagram for kQueue:
Inheritance graph

Public Member Functions

kStatus kQueue_Add (kQueue queue, const void *item)
 Adds the specified item to the end of the queue. More...
 
kStatus kQueue_AddCount (kQueue queue, kSize count)
 Increases the queue count by the specified amount. More...
 
kStatus kQueue_Allocate (kQueue queue, kType itemType, kSize initialCapacity)
 Reallocates the queue item buffer. More...
 
kStatus kQueue_Assign (kQueue queue, kQueue source)
 Performs a shallow copy of the source queue. More...
 
void * kQueue_At (kQueue queue, kSize index)
 Returns a pointer to the specified item in the queue buffer. More...
 
kSize kQueue_Capacity (kQueue queue)
 Returns the number of elements for which space has been allocated. More...
 
kStatus kQueue_Clear (kQueue queue)
 Sets the count of queue items to zero. More...
 
kStatus kQueue_Construct (kQueue *queue, kType itemType, kSize initialCapacity, kAlloc allocator)
 Constructs a kQueue object. More...
 
kSize kQueue_Count (kQueue queue)
 Returns the current count of items in the queue. More...
 
kStatus kQueue_Item (kQueue queue, kSize index, void *item)
 Gets the value of an item. More...
 
kSize kQueue_ItemSize (kQueue queue)
 Returns the queue element size. More...
 
kType kQueue_ItemType (kQueue queue)
 Returns the queue element type. More...
 
kStatus kQueue_Purge (kQueue queue)
 Disposes any elements in the queue and sets the count of queue items to zero. More...
 
kStatus kQueue_Remove (kQueue queue, void *item)
 Removes the item at the head of the queue. More...
 
kStatus kQueue_RemoveCount (kQueue queue, kSize count)
 Decreases the queue count by the specified amount. More...
 
kStatus kQueue_Reserve (kQueue queue, kSize capacity)
 Ensures that capacity is reserved for at least the specified number of queue items. More...
 
kStatus kQueue_SetItem (kQueue queue, kSize index, const void *item)
 Sets the value of an item. More...
 
- Public Member Functions inherited from kObject
kAlloc kObject_Alloc (kObject object)
 Gets the memory allocator associated with this object. More...
 
kStatus kObject_Clone (kObject *object, kObject source, kAlloc allocator)
 Constructs a new object by copying an existing object, including any aggregated child elements. More...
 
kStatus kObject_Destroy (kObject object)
 Destroys the object. More...
 
kStatus kObject_Dispose (kObject object)
 Destroys the object and any aggregated child elements. More...
 
kBool kObject_Equals (kObject object, kObject other)
 Determines whether the object is equal to another object. More...
 
kSize kObject_HashCode (kObject object)
 Gets a hash code representing the state of this object. More...
 
kBool kObject_Is (kObject object, kType type)
 Determines whether this object is an instance of the specified type. More...
 
kBool kObject_IsShared (kObject object)
 Reports whether the object is currently shared (reference count greater than one). More...
 
kStatus kObject_SetPool (kObject object, kObjectPool pool)
 Sets the object pool associated with this object. More...
 
kStatus kObject_Share (kObject object)
 Increments the reference count associated with this object. More...
 
kSize kObject_Size (kObject object)
 Estimates the memory consumed by this object, including any aggregated child elements. More...
 
kType kObject_Type (kObject object)
 Returns the type of the object. More...
 
- Public Member Functions inherited from kCollection
kSize kCollection_Count (kCollection collection)
 Gets the collection element count. More...
 
kIterator kCollection_GetIterator (kCollection collection)
 Returns an iterator to the first element in the collection. More...
 
kBool kCollection_HasNext (kCollection collection, kIterator iterator)
 Determines whether a collection has another item. More...
 
kType kCollection_ItemType (kCollection collection)
 Gets the collection element type. More...
 
void * kCollection_Next (kCollection collection, kIterator *iterator)
 Gets the next collection element and then advances the iterator. More...
 

Related

#define kQueue_AddCount_(QUEUE, C)   kxQueue_AddCount_(QUEUE, C)
 Macro version of kQueue_AddCount.
 
#define kQueue_RemoveCount_(QUEUE, C)   kxQueue_RemoveCount_(QUEUE, C)
 Macro version of kQueue_RemoveCount.
 
#define kQueue_Clear_(QUEUE)   kxQueue_Clear_(QUEUE)
 Macro version of kQueue_Clear.
 
#define kQueue_ItemType_(QUEUE)   kxQueue_ItemType_(QUEUE)
 Macro version of kQueue_ItemType.
 
#define kQueue_ItemSize_(QUEUE)   kxQueue_ItemSize_(QUEUE)
 Macro version of kQueue_ItemSize.
 
#define kQueue_Count_(QUEUE)   kxQueue_Count_(QUEUE)
 Macro version of kQueue_Count.
 
#define kQueue_Capacity_(QUEUE)   kxQueue_Capacity_(QUEUE)
 Macro version of kQueue_Capacity.
 
#define kQueue_At_(QUEUE, INDEX)   kxQueue_At_(QUEUE, INDEX)
 Macro version of kQueue_At.
 
#define kQueue_As_(QUEUE, INDEX, TYPE)   kxQueue_As_(QUEUE, INDEX, TYPE)
 Accesses a queue element at the specified index, and casts the value to the specified type. More...
 

The documentation for this class was generated from the following file: