public class BoundedBuffer extends Object implements BoundedChannel
Modifier and Type | Field and Description |
---|---|
protected Object[] |
array_ |
protected int |
emptySlots_ |
protected Object |
putMonitor_
Helper monitor to handle puts.
|
protected int |
putPtr_ |
protected int |
takePtr_ |
protected int |
usedSlots_ |
Constructor and Description |
---|
BoundedBuffer()
Create a buffer with the current default capacity
|
BoundedBuffer(int capacity)
Create a BoundedBuffer with the given capacity.
|
Modifier and Type | Method and Description |
---|---|
int |
capacity()
Return the maximum number of elements that can be held.
|
protected Object |
extract() |
protected void |
incEmptySlots() |
protected void |
incUsedSlots() |
protected void |
insert(Object x) |
boolean |
offer(Object x,
long msecs)
Place item in channel only if it can be accepted within
msecs milliseconds.
|
Object |
peek()
Return, but do not remove object at head of Channel,
or null if it is empty.
|
Object |
poll(long msecs)
Return and remove an item from channel only if one is available within
msecs milliseconds.
|
void |
put(Object x)
Place item in the channel, possibly waiting indefinitely until
it can be accepted.
|
int |
size()
Return the number of elements in the buffer.
|
Object |
take()
Return and remove an item from channel,
possibly waiting indefinitely until
such an item exists.
|
protected final Object[] array_
protected int takePtr_
protected int putPtr_
protected int usedSlots_
protected int emptySlots_
protected final Object putMonitor_
public BoundedBuffer(int capacity) throws IllegalArgumentException
IllegalArgumentException
- if capacity less or equal to zeropublic BoundedBuffer()
public int size()
public int capacity()
BoundedChannel
capacity
in interface BoundedChannel
protected void incEmptySlots()
protected void incUsedSlots()
protected final void insert(Object x)
protected final Object extract()
public Object peek()
Channel
public void put(Object x) throws InterruptedException
Channel
put
in interface Channel
put
in interface Puttable
x
- the element to be inserted. Should be non-null.InterruptedException
- if the current thread has
been interrupted at a point at which interruption
is detected, in which case the element is guaranteed not
to be inserted. Otherwise, on normal return, the element is guaranteed
to have been inserted.public boolean offer(Object x, long msecs) throws InterruptedException
Channel
offer
in interface Channel
offer
in interface Puttable
x
- the element to be inserted. Should be non-null.msecs
- the number of milliseconds to wait. If less than
or equal to zero, the method does not perform any timed waits,
but might still require
access to a synchronization lock, which can impose unbounded
delay if there is a lot of contention for the channel.InterruptedException
- if the current thread has
been interrupted at a point at which interruption
is detected, in which case the element is guaranteed not
to be inserted (i.e., is equivalent to a false return).public Object take() throws InterruptedException
Channel
take
in interface Channel
take
in interface Takable
InterruptedException
- if the current thread has
been interrupted at a point at which interruption
is detected, in which case state of the channel is unchanged.public Object poll(long msecs) throws InterruptedException
Channel
poll
in interface Channel
poll
in interface Takable
msecs
- the number of milliseconds to wait. If less than
or equal to zero, the operation does not perform any timed waits,
but might still require
access to a synchronization lock, which can impose unbounded
delay if there is a lot of contention for the channel.InterruptedException
- if the current thread has
been interrupted at a point at which interruption
is detected, in which case state of the channel is unchanged
(i.e., equivalent to a null return).Copyright © 2002–2017. All rights reserved.