antonio-macovei / memory-allocator

A memory allocator written in C

Memory Allocator - Project

References: https://ocw.cs.pub.ro/courses/programare/teme_2017/proiect_2017_ca

Available commands:

INITIALIZE n
FINALIZE
DUMP
ALLOC size
FREE index
FILL index size value
SHOW info

info can be one of the following: FREE, USAGE, ALLOCATIONS

The programs runs until it receives the FINALIZE command.

EXAMPLE 1:

INITIALIZE 100
ALLOC 13
16
FILL 16 13 255
DUMP
00000000 04 00 00 00 00 00 00 00 00 00 00 00 19 00 00 00
00000010 FF FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00
00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000060 00 00 00 00
00000064
FREE 16
ALLOC 50
16
ALLOC 40
0
ALLOC 30
0
ALLOC 20
78
FILL 78 20 127
DUMP
00000000 04 00 00 00 42 00 00 00 00 00 00 00 3E 00 00 00
00000010 FF FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00
00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000040 00 00 00 00 00 00 04 00 00 00 20 00 00 00 7F 7F
00000050 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
00000060 7F 7F 00 00
00000064
FREE 16
FREE 78
FINALIZE

EXAMPLE 2:

INITIALIZE 100
ALLOC 10
16
ALLOC 10
38
ALLOC 10
60
ALLOC 10
82
ALLOC 10
0
FREE 16
FREE 60
FILL 38 10 255
FILL 82 10 255
DUMP
00000000 1A 00 00 00 1A 00 00 00 00 00 00 00 16 00 00 00
00000010 00 00 00 00 00 00 00 00 00 00 46 00 00 00 00 00
00000020 00 00 16 00 00 00 FF FF FF FF FF FF FF FF FF FF
00000030 46 00 00 00 1A 00 00 00 16 00 00 00 00 00 00 00
00000040 00 00 00 00 00 00 00 00 00 00 1A 00 00 00 16 00
00000050 00 00 FF FF FF FF FF FF FF FF FF FF 00 00 00 00
00000060 00 00 00 00
00000064
FINALIZE

EXAMPLE 3:

INITIALIZE 100
ALLOC 20
16
ALLOC 20
48
SHOW FREE
1 blocks (32 bytes) free
SHOW USAGE
2 blocks (40 bytes) used
58% efficiency
0% fragmentation
SHOW ALLOCATIONS
OCCUPIED 4 bytes
OCCUPIED 32 bytes
OCCUPIED 32 bytes
FREE 32 bytes
FREE 16
SHOW FREE
2 blocks (64 bytes) free
SHOW USAGE
1 blocks (20 bytes) used
55% efficiency
100% fragmentation
SHOW ALLOCATIONS
OCCUPIED 4 bytes
FREE 32 bytes
OCCUPIED 32 bytes
FREE 32 bytes
FINALIZE

Antonio Dan Macovei