Copyright	Will Thompson and Iñaki García Etxebarria
License	LGPL-2.1
Maintainer	Iñaki García Etxebarria
Safe Haskell	Safe-Inferred
Language	Haskell2010

GI.GLib.Structs.Queue

Contents

Exported types
Methods
Properties

Description

Contains the public fields of a [Queue][glib-Double-ended-Queues].

Synopsis

newtype Queue = Queue (ManagedPtr Queue)
newZeroQueue :: MonadIO m => m Queue
queueClear :: (HasCallStack, MonadIO m) => Queue -> m ()
queueClearFull :: (HasCallStack, MonadIO m) => Queue -> Maybe DestroyNotify -> m ()
queueFree :: (HasCallStack, MonadIO m) => Queue -> m ()
queueFreeFull :: (HasCallStack, MonadIO m) => Queue -> DestroyNotify -> m ()
queueGetLength :: (HasCallStack, MonadIO m) => Queue -> m Word32
queueIndex :: (HasCallStack, MonadIO m) => Queue -> Ptr () -> m Int32
queueInit :: (HasCallStack, MonadIO m) => Queue -> m ()
queueIsEmpty :: (HasCallStack, MonadIO m) => Queue -> m Bool
queuePeekHead :: (HasCallStack, MonadIO m) => Queue -> m (Ptr ())
queuePeekNth :: (HasCallStack, MonadIO m) => Queue -> Word32 -> m (Ptr ())
queuePeekTail :: (HasCallStack, MonadIO m) => Queue -> m (Ptr ())
queuePopHead :: (HasCallStack, MonadIO m) => Queue -> m (Ptr ())
queuePopNth :: (HasCallStack, MonadIO m) => Queue -> Word32 -> m (Ptr ())
queuePopTail :: (HasCallStack, MonadIO m) => Queue -> m (Ptr ())
queuePushHead :: (HasCallStack, MonadIO m) => Queue -> Ptr () -> m ()
queuePushNth :: (HasCallStack, MonadIO m) => Queue -> Ptr () -> Int32 -> m ()
queuePushTail :: (HasCallStack, MonadIO m) => Queue -> Ptr () -> m ()
queueRemove :: (HasCallStack, MonadIO m) => Queue -> Ptr () -> m Bool
queueRemoveAll :: (HasCallStack, MonadIO m) => Queue -> Ptr () -> m Word32
queueReverse :: (HasCallStack, MonadIO m) => Queue -> m ()
clearQueueHead :: MonadIO m => Queue -> m ()
getQueueHead :: MonadIO m => Queue -> m [Ptr ()]
setQueueHead :: MonadIO m => Queue -> Ptr (GList (Ptr ())) -> m ()
getQueueLength :: MonadIO m => Queue -> m Word32
setQueueLength :: MonadIO m => Queue -> Word32 -> m ()
clearQueueTail :: MonadIO m => Queue -> m ()
getQueueTail :: MonadIO m => Queue -> m [Ptr ()]
setQueueTail :: MonadIO m => Queue -> Ptr (GList (Ptr ())) -> m ()

Exported types

newtype Queue Source #

Memory-managed wrapper type.

Constructors

Queue (ManagedPtr Queue)

Instances

Instances details

Eq Queue Source #
Instance details Defined in GI.GLib.Structs.Queue Methods (==) :: Queue -> Queue -> Bool # (/=) :: Queue -> Queue -> Bool #
BoxedPtr Queue Source #
Instance details Defined in GI.GLib.Structs.Queue Methods boxedPtrCopy :: Queue -> IO Queue # boxedPtrFree :: Queue -> IO () #
CallocPtr Queue Source #
Instance details Defined in GI.GLib.Structs.Queue Methods boxedPtrCalloc :: IO (Ptr Queue) #
ManagedPtrNewtype Queue Source #
Instance details Defined in GI.GLib.Structs.Queue Methods toManagedPtr :: Queue -> ManagedPtr Queue #
tag ~ 'AttrSet => Constructible Queue tag Source #
Instance details Defined in GI.GLib.Structs.Queue Methods new :: MonadIO m => (ManagedPtr Queue -> Queue) -> [AttrOp Queue tag] -> m Queue #

newZeroQueue :: MonadIO m => m Queue Source #

Construct a Queue struct initialized to zero.

Methods

Click to display all available methods, including inherited ones

Expand

Methods

clear, clearFull, free, freeFull, index, init, isEmpty, peekHead, peekNth, peekTail, popHead, popNth, popTail, pushHead, pushNth, pushTail, remove, removeAll, reverse.

Getters

getLength.

Setters

None.

clear

queueClear Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m ()

Removes all the elements in queue. If queue elements contain dynamically-allocated memory, they should be freed first.

Since: 2.14

clearFull

queueClearFull Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a pointer to a `Queue`
-> Maybe DestroyNotify	`freeFunc`: the function to be called to free memory allocated
-> m ()

Convenience method, which frees all the memory used by a Queue, and calls the provided freeFunc on each item in the Queue.

Since: 2.60

free

queueFree Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m ()

Frees the memory allocated for the Queue. Only call this function if queue was created with g_queue_new(). If queue elements contain dynamically-allocated memory, they should be freed first.

If queue elements contain dynamically-allocated memory, you should either use queueFreeFull or free them manually first.

freeFull

queueFreeFull Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a pointer to a `Queue`
-> DestroyNotify	`freeFunc`: the function to be called to free each element's data
-> m ()

Convenience method, which frees all the memory used by a Queue, and calls the specified destroy function on every element's data.

freeFunc should not modify the queue (eg, by removing the freed element from it).

Since: 2.32

getLength

queueGetLength Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m Word32	Returns: the number of items in `queue`

Returns the number of items in queue.

Since: 2.4

index

queueIndex Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> Ptr ()	`data`: the data to find
-> m Int32	Returns: the position of the first element in `queue` which contains `data`, or -1 if no element in `queue` contains `data`

Returns the position of the first element in queue which contains data.

Since: 2.4

init

queueInit Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: an uninitialized `Queue`
-> m ()

A statically-allocated Queue must be initialized with this function before it can be used. Alternatively you can initialize it with G_QUEUE_INIT. It is not necessary to initialize queues created with g_queue_new().

Since: 2.14

isEmpty

queueIsEmpty Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`.
-> m Bool	Returns: `True` if the queue is empty

Returns True if the queue is empty.

peekHead

queuePeekHead Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m (Ptr ())	Returns: the data of the first element in the queue, or `Nothing` if the queue is empty

Returns the first element of the queue.

peekNth

queuePeekNth Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> Word32	`n`: the position of the element
-> m (Ptr ())	Returns: the data for the `n`'th element of `queue`, or `Nothing` if `n` is off the end of `queue`

Returns the n'th element of queue.

Since: 2.4

peekTail

queuePeekTail Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m (Ptr ())	Returns: the data of the last element in the queue, or `Nothing` if the queue is empty

Returns the last element of the queue.

popHead

queuePopHead Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m (Ptr ())	Returns: the data of the first element in the queue, or `Nothing` if the queue is empty

Removes the first element of the queue and returns its data.

popNth

queuePopNth Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> Word32	`n`: the position of the element
-> m (Ptr ())	Returns: the element's data, or `Nothing` if `n` is off the end of `queue`

Removes the n'th element of queue and returns its data.

Since: 2.4

popTail

queuePopTail Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m (Ptr ())	Returns: the data of the last element in the queue, or `Nothing` if the queue is empty

Removes the last element of the queue and returns its data.

pushHead

queuePushHead Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`.
-> Ptr ()	`data`: the data for the new element.
-> m ()

Adds a new element at the head of the queue.

pushNth

queuePushNth Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> Ptr ()	`data`: the data for the new element
-> Int32	`n`: the position to insert the new element. If `n` is negative or larger than the number of elements in the `queue`, the element is added to the end of the queue.
-> m ()

Inserts a new element into queue at the given position.

Since: 2.4

pushTail

queuePushTail Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> Ptr ()	`data`: the data for the new element
-> m ()

Adds a new element at the tail of the queue.

remove

queueRemove Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> Ptr ()	`data`: the data to remove
-> m Bool	Returns: `True` if `data` was found and removed from `queue`

Removes the first element in queue that contains data.

Since: 2.4

removeAll

queueRemoveAll Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> Ptr ()	`data`: the data to remove
-> m Word32	Returns: the number of elements removed from `queue`

Remove all elements whose data equals data from queue.

Since: 2.4

reverse

queueReverse Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Queue	`queue`: a `Queue`
-> m ()

Reverses the order of the items in queue.

Since: 2.4

Properties

head

a pointer to the first element of the queue

clearQueueHead :: MonadIO m => Queue -> m () Source #

Set the value of the “head” field to Nothing. When overloading is enabled, this is equivalent to

clear #head

getQueueHead :: MonadIO m => Queue -> m [Ptr ()] Source #

Get the value of the “head” field. When overloading is enabled, this is equivalent to

get queue #head

setQueueHead :: MonadIO m => Queue -> Ptr (GList (Ptr ())) -> m () Source #

Set the value of the “head” field. When overloading is enabled, this is equivalent to

set queue [ #head := value ]

length

the number of elements in the queue

getQueueLength :: MonadIO m => Queue -> m Word32 Source #

Get the value of the “length” field. When overloading is enabled, this is equivalent to

get queue #length

setQueueLength :: MonadIO m => Queue -> Word32 -> m () Source #

Set the value of the “length” field. When overloading is enabled, this is equivalent to

set queue [ #length := value ]

tail

a pointer to the last element of the queue

clearQueueTail :: MonadIO m => Queue -> m () Source #

Set the value of the “tail” field to Nothing. When overloading is enabled, this is equivalent to

clear #tail

getQueueTail :: MonadIO m => Queue -> m [Ptr ()] Source #

Get the value of the “tail” field. When overloading is enabled, this is equivalent to

get queue #tail

setQueueTail :: MonadIO m => Queue -> Ptr (GList (Ptr ())) -> m () Source #

Set the value of the “tail” field. When overloading is enabled, this is equivalent to

set queue [ #tail := value ]