Component bdlma_memoryblockdescriptor [Package bdlma]

Provide a class describing a block of memory. More...

Namespaces
namespace	bdlma

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Detailed Description

Outline

• Purpose
• Classes
• Description
  • Usage

Purpose:

Provide a class describing a block of memory.

Classes:

bdlma::MemoryBlockDescriptor

describes a block of memory

See also:

Description:

This component defines an in-core value-semantic class for describing a block of memory, namely bdlma::MemoryBlockDescriptor. Each descriptor object contains the address of the block of memory and the size of the block. The distinguished "null" descriptor contains an address and a size that are both 0.

Usage:

This example demonstrates how to create and test the state of a bdlma::MemoryBlockDescriptor.

   char buffer[100];

   bdlma::MemoryBlockDescriptor a(buffer, sizeof buffer);
                               assert(!a.isNull());
                               assert(buffer         == a.address());
                               assert(sizeof buffer  == a.size());

   bdlma::MemoryBlockDescriptor b;
                               assert( b.isNull());
                               assert(0              == b.address());
                               assert(0              == b.size());
                               assert(a              != b);

   b = a;
                               assert(!b.isNull());
                               assert(buffer         == b.address());
                               assert(sizeof buffer  == b.size());
                               assert(a              == b);