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%global _empty_manifest_terminate_build 0
Name: python-readerwriterlock
Version: 1.0.9
Release: 1
Summary: A python implementation of the three Reader-Writer problems.
License: MIT
URL: https://github.com/elarivie/pyReaderWriterLock
Source0: https://mirrors.nju.edu.cn/pypi/web/packages/a4/b9/6b7c390440ec23bf5fdf33e76d6c3b697a788b983c11cb2739d6541835d6/readerwriterlock-1.0.9.tar.gz
BuildArch: noarch
Requires: python3-typing-extensions
%description
**A python implementation of a solution for the three Reader-Writer problems.**
[](https://www.repostatus.org/#active)
[](https://travis-ci.org/elarivie/pyReaderWriterLock)
[](https://codecov.io/gh/elarivie/pyreaderwriterlock)
[][pyReaderWriterLock_BugTracker]
[][python]
[][pyReaderWriterLock_Pypi]
[][pyReaderWriterLock_repo]
[][pyReaderWriterLock_License]
[](https://pepy.tech/project/readerwriterlock)
[](https://pepy.tech/project/readerwriterlock/month)
[](https://pepy.tech/project/readerwriterlock/week)
[][pyReaderWriterLock_repo_star]
Not only does it implement the reader-writer problems, it is also compliant with the python [lock interface](https://docs.python.org/3/library/threading.html#threading.Lock) which among others include support for timeout.
For reading about the theory behind the reader-writer problems refer to [Wikipedia](https://wikipedia.org/wiki/Readers–writers_problem).
# Installation
Install the python package [readerwriterlock](https://pypi.python.org/pypi/readerwriterlock)
```bash
python3 -m pip install -U readerwriterlock
```
# Usage
1. Choose a rwlock class base on your access priority need and feature need which is going to be use by the threads:
| Priority | +Speed | +Downgradable* |
|---------------------------------------------------------------|-----------------|---------------|
| **Reader priority** (*aka First readers-writers problem*) | RWLockRead | RWLockReadD |
| **Writer priority** (*aka Second readers-writers problem*) | RWLockWrite | RWLockWriteD |
| **Fair priority** (*aka Third readers-writers problem*) | RWLockFair | RWLockFairD |
* **Downgradable** feature allows the locks to be atomically downgraded from being locked in write-mode to locked in read-mode
ⓘ Downgradable classes come with a theoretical ~20% negative effect on performance for acquiring and releasing locks.
2. Instantiate an instance of the chosen RWLock class:
```python
from readerwriterlock import rwlock
a = rwlock.RWLockFairD()
```
3. Generate read locks and write locks using the following methods:
```python
a_reader_lock = a.gen_rlock()
a_writer_lock = a.gen_wlock()
```
4. Use the generated read/write locks to protect section in your code:
## Pythonic usage example
```python
with a.gen_rlock():
#Read stuff
with a.gen_wlock():
#Write stuff
```
## Use case (Timeout) example
```python
b = a.gen_wlock()
if b.acquire(blocking=True, timeout=5):
try:
#Do stuff
finally:
b.release()
```
## Use case (Downgrade) example
```python
b = a.gen_wlock()
if b.acquire():
try:
#Read/Write stuff
b = b.downgrade()
#Read stuff
finally:
b.release()
```
## Live example
Refer to the file [test_rwlock.py](tests/test_rwlock.py) which has above 90% line coverage of [rwlock.py](readerwriterlock/rwlock.py).
The tests can be initiated by doing
```bash
make check.test.coverage
```
%package -n python3-readerwriterlock
Summary: A python implementation of the three Reader-Writer problems.
Provides: python-readerwriterlock
BuildRequires: python3-devel
BuildRequires: python3-setuptools
BuildRequires: python3-pip
%description -n python3-readerwriterlock
**A python implementation of a solution for the three Reader-Writer problems.**
[](https://www.repostatus.org/#active)
[](https://travis-ci.org/elarivie/pyReaderWriterLock)
[](https://codecov.io/gh/elarivie/pyreaderwriterlock)
[][pyReaderWriterLock_BugTracker]
[][python]
[][pyReaderWriterLock_Pypi]
[][pyReaderWriterLock_repo]
[][pyReaderWriterLock_License]
[](https://pepy.tech/project/readerwriterlock)
[](https://pepy.tech/project/readerwriterlock/month)
[](https://pepy.tech/project/readerwriterlock/week)
[][pyReaderWriterLock_repo_star]
Not only does it implement the reader-writer problems, it is also compliant with the python [lock interface](https://docs.python.org/3/library/threading.html#threading.Lock) which among others include support for timeout.
For reading about the theory behind the reader-writer problems refer to [Wikipedia](https://wikipedia.org/wiki/Readers–writers_problem).
# Installation
Install the python package [readerwriterlock](https://pypi.python.org/pypi/readerwriterlock)
```bash
python3 -m pip install -U readerwriterlock
```
# Usage
1. Choose a rwlock class base on your access priority need and feature need which is going to be use by the threads:
| Priority | +Speed | +Downgradable* |
|---------------------------------------------------------------|-----------------|---------------|
| **Reader priority** (*aka First readers-writers problem*) | RWLockRead | RWLockReadD |
| **Writer priority** (*aka Second readers-writers problem*) | RWLockWrite | RWLockWriteD |
| **Fair priority** (*aka Third readers-writers problem*) | RWLockFair | RWLockFairD |
* **Downgradable** feature allows the locks to be atomically downgraded from being locked in write-mode to locked in read-mode
ⓘ Downgradable classes come with a theoretical ~20% negative effect on performance for acquiring and releasing locks.
2. Instantiate an instance of the chosen RWLock class:
```python
from readerwriterlock import rwlock
a = rwlock.RWLockFairD()
```
3. Generate read locks and write locks using the following methods:
```python
a_reader_lock = a.gen_rlock()
a_writer_lock = a.gen_wlock()
```
4. Use the generated read/write locks to protect section in your code:
## Pythonic usage example
```python
with a.gen_rlock():
#Read stuff
with a.gen_wlock():
#Write stuff
```
## Use case (Timeout) example
```python
b = a.gen_wlock()
if b.acquire(blocking=True, timeout=5):
try:
#Do stuff
finally:
b.release()
```
## Use case (Downgrade) example
```python
b = a.gen_wlock()
if b.acquire():
try:
#Read/Write stuff
b = b.downgrade()
#Read stuff
finally:
b.release()
```
## Live example
Refer to the file [test_rwlock.py](tests/test_rwlock.py) which has above 90% line coverage of [rwlock.py](readerwriterlock/rwlock.py).
The tests can be initiated by doing
```bash
make check.test.coverage
```
%package help
Summary: Development documents and examples for readerwriterlock
Provides: python3-readerwriterlock-doc
%description help
**A python implementation of a solution for the three Reader-Writer problems.**
[](https://www.repostatus.org/#active)
[](https://travis-ci.org/elarivie/pyReaderWriterLock)
[](https://codecov.io/gh/elarivie/pyreaderwriterlock)
[][pyReaderWriterLock_BugTracker]
[][python]
[][pyReaderWriterLock_Pypi]
[][pyReaderWriterLock_repo]
[][pyReaderWriterLock_License]
[](https://pepy.tech/project/readerwriterlock)
[](https://pepy.tech/project/readerwriterlock/month)
[](https://pepy.tech/project/readerwriterlock/week)
[][pyReaderWriterLock_repo_star]
Not only does it implement the reader-writer problems, it is also compliant with the python [lock interface](https://docs.python.org/3/library/threading.html#threading.Lock) which among others include support for timeout.
For reading about the theory behind the reader-writer problems refer to [Wikipedia](https://wikipedia.org/wiki/Readers–writers_problem).
# Installation
Install the python package [readerwriterlock](https://pypi.python.org/pypi/readerwriterlock)
```bash
python3 -m pip install -U readerwriterlock
```
# Usage
1. Choose a rwlock class base on your access priority need and feature need which is going to be use by the threads:
| Priority | +Speed | +Downgradable* |
|---------------------------------------------------------------|-----------------|---------------|
| **Reader priority** (*aka First readers-writers problem*) | RWLockRead | RWLockReadD |
| **Writer priority** (*aka Second readers-writers problem*) | RWLockWrite | RWLockWriteD |
| **Fair priority** (*aka Third readers-writers problem*) | RWLockFair | RWLockFairD |
* **Downgradable** feature allows the locks to be atomically downgraded from being locked in write-mode to locked in read-mode
ⓘ Downgradable classes come with a theoretical ~20% negative effect on performance for acquiring and releasing locks.
2. Instantiate an instance of the chosen RWLock class:
```python
from readerwriterlock import rwlock
a = rwlock.RWLockFairD()
```
3. Generate read locks and write locks using the following methods:
```python
a_reader_lock = a.gen_rlock()
a_writer_lock = a.gen_wlock()
```
4. Use the generated read/write locks to protect section in your code:
## Pythonic usage example
```python
with a.gen_rlock():
#Read stuff
with a.gen_wlock():
#Write stuff
```
## Use case (Timeout) example
```python
b = a.gen_wlock()
if b.acquire(blocking=True, timeout=5):
try:
#Do stuff
finally:
b.release()
```
## Use case (Downgrade) example
```python
b = a.gen_wlock()
if b.acquire():
try:
#Read/Write stuff
b = b.downgrade()
#Read stuff
finally:
b.release()
```
## Live example
Refer to the file [test_rwlock.py](tests/test_rwlock.py) which has above 90% line coverage of [rwlock.py](readerwriterlock/rwlock.py).
The tests can be initiated by doing
```bash
make check.test.coverage
```
%prep
%autosetup -n readerwriterlock-1.0.9
%build
%py3_build
%install
%py3_install
install -d -m755 %{buildroot}/%{_pkgdocdir}
if [ -d doc ]; then cp -arf doc %{buildroot}/%{_pkgdocdir}; fi
if [ -d docs ]; then cp -arf docs %{buildroot}/%{_pkgdocdir}; fi
if [ -d example ]; then cp -arf example %{buildroot}/%{_pkgdocdir}; fi
if [ -d examples ]; then cp -arf examples %{buildroot}/%{_pkgdocdir}; fi
pushd %{buildroot}
if [ -d usr/lib ]; then
find usr/lib -type f -printf "/%h/%f\n" >> filelist.lst
fi
if [ -d usr/lib64 ]; then
find usr/lib64 -type f -printf "/%h/%f\n" >> filelist.lst
fi
if [ -d usr/bin ]; then
find usr/bin -type f -printf "/%h/%f\n" >> filelist.lst
fi
if [ -d usr/sbin ]; then
find usr/sbin -type f -printf "/%h/%f\n" >> filelist.lst
fi
touch doclist.lst
if [ -d usr/share/man ]; then
find usr/share/man -type f -printf "/%h/%f.gz\n" >> doclist.lst
fi
popd
mv %{buildroot}/filelist.lst .
mv %{buildroot}/doclist.lst .
%files -n python3-readerwriterlock -f filelist.lst
%dir %{python3_sitelib}/*
%files help -f doclist.lst
%{_docdir}/*
%changelog
* Fri Apr 21 2023 Python_Bot <Python_Bot@openeuler.org> - 1.0.9-1
- Package Spec generated
|
