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Dr. Anil Sharma, Lovely Professional University Unit 5: Memory Management (I)

Unit 5: Memory Management (I) Notes

CONTENTS
Objectives
Introduction

5.1 Local vs Global Memory
5.1.1 Global Memory
5.1.2 Local Memory

5.2 Local Memory Blocks
5.3 Using Fixed Memory Blocks
5.3.1 Fixed Size Memory Management Configuration
5.4 Changing the Size of a Memory Block
5.5 Using LocalReAlloc()

5.5.1 Parameters
5.5.2 Return Values
5.6 Discardable Memory Blocks

5.7 Summary
5.8 Keywords
5.9 Review Questions
5.10 Further Readings

Objectives

After studying this unit, you will be able to:

 Understand local vs global memory
 Discuss local memory blocks

 Understand using fixed memory blocks
 Discuss changing the size of the memory block
 Illustrate using LocalReAlloc()
 Discuss discardable memory blocks

Introduction

Memory management under Win32 from the application’s standpoint is pretty simple and
uncomplicated. Each process possesses a 4 GB memory address space. The memory model used
is known as a flat memory model. In this model, all segment registers (or selectors) point to the
similar beginning address and the offset is 32-bit so an application can use memory at any point
in its own address space without the requirement to modify the value of selectors. This shortens
memory management a lot. There’s no “near” or “far” pointer any longer.

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