Process-shared Reader-Writer locks for Python
A reader-writer lock for Python that can (must, actually) be used for locking across multiple Python processes.
The rationale and initial implementation of the project can be found in the accompanying blog post.
Usage
There is no need for initialization. Therefore, a code block such as the one below is enough to get an RWLock instance.
from prwlock.prwlock import RWLock
rwlock = RWLock()The RWLock itself is pickleable and, therefore, can be passed around to child processes, such as in the code block below.
from __future__ import print_function
import os
import time
from multiprocessing import Pool
from prwlock.prwlock import RWLock
def f(rwlock):
for i in range(2):
print(os.getpid(), 'Acquiring read lock')
rwlock.acquire_read()
print(os.getpid(), 'Sleeping for a while')
time.sleep(1)
print(os.getpid(), 'Releasing lock')
rwlock.release()
time.sleep(.1)
r = RWLock()
children = 20
pool = Pool(processes=children)
for child in range(children):
pool.apply_async(f, [r])1 maintainer
Metadata
1 maintainer
Release files for prwlock 0.1.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| prwlock-0.1.0.tar.gz | 5.1 kB | Details |
Built distributions (wheels)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| prwlock-0.1.0-py3-none-any.whl | Python 3 | none | any | Details |
| prwlock-0.1.0-py2-none-any.whl | Python 2 | none | any | Details |
Total release size: 19.6 kB
Release files / prwlock-0.1.0.tar.gz
| Download URL | prwlock-0.1.0.tar.gz |
|---|---|
| Size | 5.1 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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Release files / prwlock-0.1.0-py3-none-any.whl
| Download URL | prwlock-0.1.0-py3-none-any.whl |
|---|---|
| Size | 7.3 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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No |
Release files / prwlock-0.1.0-py2-none-any.whl
| Download URL | prwlock-0.1.0-py2-none-any.whl |
|---|---|
| Size | 7.2 kB |
| Tags | Python 2 |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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