freeBlock

 

 

Description

The freeBlock function sets the specified blocks to vacant in the Bit Vector. Vacant blocks are represented by 0 bits, while occupied blocks are represented by 1 bits.

For example:

(freeBlock bitVector i 3)

The above freeBlock invocation sets the 3 blocks (starting at bit index i) to be vacant. After this invocation:

bitVector[i] = 0

bitVector[(+ i 1)] = 0

bitVector[(+ i 2)] = 0

When to use

The freeBlock function is used to deallocate block space in a BitVector used to manage a memory space or disk space.

 

Syntax

(freeBlock BitVector blockIndex blockCount)



Name Description AIS Types
BitVectorThe BitVector in which a consecutive string of blocks to be set vacant.BitVector
blockIndexThe starting bit index of the consecutive string of blocks to be set vacant.Integer
blockCountThe number of consecutive vacant blocks to be set vacantInteger


Returns:

The block index after the last freed block.

 

Examples

Here are a number of links to Lambda coding examples which contain this instruction in various use cases.

Example_BitVector_freeBlock_001

These examples show how the freeBlock function works on the BitVector deallocating space on the BitVector starting on the specified index.

 

Argument Types

Here are the links to the data types of the function arguments.

Vector BitVector Integer

Here are also a number of links to functions having arguments with any of these data types.

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