Helper that allocates tentative blocks at either end of a deque.

Synopsis

Declared in <bslstl_deque.h>

template<
    class VALUE_TYPE,
    class ALLOCATOR>
class Deque_BlockCreator;

Description

This class allocates blocks at the front or back of a deque and tentatively adds them to the deque. It also keeps track of how many of the newly allocated blocks have actually been used by the deque. The destructor automatically frees any unused blocks (e.g., in case an exception is thrown).

Member Functions

Name

Description

Deque_BlockCreator [constructor]

Create a block creator for the specified deque.

~Deque_BlockCreator [destructor]

Free any blocks that have been allocated by this allocator but have not yet been used by the deque.

insertAtBack

Allocate n blocks at the back of the block array.

insertAtFront

Allocate n blocks at the front of the block array.

release

Relinquish control over any allocated blocks. The destructor will do nothing following a call to this method.

reserveBlockSlots

Make room for numNewBlocks pointers in the blocks array.

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