Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add Memory Allocator #12497

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Add Memory Allocator #12497

wants to merge 1 commit into from

Conversation

isidroas
Copy link
Contributor

@isidroas isidroas commented Jan 4, 2025

Describe your change:

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
  • Documentation change?

Checklist:

  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized.
  • I know that pull requests will not be merged if they fail the automated tests.
  • This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • All new Python files are placed inside an existing directory.
  • All filenames are in all lowercase characters with no spaces or dashes.
  • All functions and variable names follow Python naming conventions.
  • All function parameters and return values are annotated with Python type hints.
  • All functions have doctests that pass the automated testing.
  • All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
  • If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

@isidroas isidroas force-pushed the malloc branch 2 times, most recently from 7a303ee to 94896dd Compare January 5, 2025 16:00
@isidroas isidroas marked this pull request as ready for review January 7, 2025 10:25
@algorithms-keeper algorithms-keeper bot added awaiting reviews This PR is ready to be reviewed require tests Tests [doctest/unittest/pytest] are required require type hints https://docs.python.org/3/library/typing.html labels Jan 7, 2025
Copy link

@algorithms-keeper algorithms-keeper bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

Python:

Automated review generated by algorithms-keeper. If there's any problem regarding this review, please open an issue about it.

algorithms-keeper commands and options

algorithms-keeper actions can be triggered by commenting on this PR:

  • @algorithms-keeper review to trigger the checks for only added pull request files
  • @algorithms-keeper review-all to trigger the checks for all the pull request files, including the modified files. As we cannot post review comments on lines not part of the diff, this command will post all the messages in one comment.

NOTE: Commands are in beta and so this feature is restricted only to a member or owner of the organization.

only add or remove elements at the end.
"""

def __init__(self):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: __init__. If the function does not return a value, please provide the type hint as: def function() -> None:

def __init__(self):
self.data = bytearray()

def print(self, show_offset=False, bytes_per_row=4):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: print. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: show_offset

Please provide type hint for the parameter: bytes_per_row


return previous_program_break

def __len__(self):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: __len__. If the function does not return a value, please provide the type hint as: def function() -> None:

As there is no test file in this pull request nor any test function or class in the file other/memory_allocator.py, please provide doctest for the function __len__

# unallocated memory for other processes.
return len(self.data)

def __getitem__(self, index):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: __getitem__. If the function does not return a value, please provide the type hint as: def function() -> None:

As there is no test file in this pull request nor any test function or class in the file other/memory_allocator.py, please provide doctest for the function __getitem__

Please provide type hint for the parameter: index

# fault' signal emitted by the OS
return self.data[index]

def __setitem__(self, index, value: int):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: __setitem__. If the function does not return a value, please provide the type hint as: def function() -> None:

As there is no test file in this pull request nor any test function or class in the file other/memory_allocator.py, please provide doctest for the function __setitem__

Please provide type hint for the parameter: index

0 4 b'....'
"""

def realloc_block(self, block, new_size):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: realloc_block. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: block

Please provide type hint for the parameter: new_size

0 1 b'.'
"""

def optimize_after_free(self, block):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: optimize_after_free. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: block

if block.is_last:
self.shrink_heap()

def shrink_heap(self):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: shrink_heap. If the function does not return a value, please provide the type hint as: def function() -> None:

self.linked_list_remove_last()
self.heap.sbrk(-last.size)

def linked_list_remove_last(self):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: linked_list_remove_last. If the function does not return a value, please provide the type hint as: def function() -> None:

https://en.wikipedia.org/wiki/Fragmentation_(computing)#External_fragmentation
"""

def find_fit_block(self, size):

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please provide return type hint for the function: find_fit_block. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: size

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
awaiting reviews This PR is ready to be reviewed require tests Tests [doctest/unittest/pytest] are required require type hints https://docs.python.org/3/library/typing.html
Projects
None yet
Development

Successfully merging this pull request may close these issues.

1 participant