Programming: Thread Synchronization, Python, C++

• Thread Synchronization in Linux and Windows Systems, Part 1

  In modern operating systems, each process has its own address space and one thread of control. However, in practice we often face situations requiring several concurrent tasks within a single process and with access to the same process components: structures, open file descriptors, etc.

• Intro to Black – The Uncompromising Python Code Formatter

  There are several Python code checkers available. For example, a lot of developers enjoy using Pylint or Flake8 to check their code for errors. These tools use static code analysis to check your code for bugs or naming issues. Flake8 will also check your code to see if you are adhering to PEP8, Python’s style guide.

• Report from the February 2019 ISO C++ meeting (Library)

  Back in February, I attended the WG21 C++ standards committee meeting in rainy Kona, Hawaii (yes, it rained most of the week). This report is so late that we’re now preparing for the next meeting, which will take place mid-July in Cologne. As usual, I spent the majority of my time in the Library Working Group (for LWG; for details on the various Working Groups and Study Groups see Standard C++: The Committee). The purpose of the LWG is to formalize the specification of the C++ Standard Library, i.e. the second “half” of the C++ standard (although in terms of page count it’s closer to three quarters than half). With a new C++20 standard on the horizon, and lots of new features that people want added to the standard library, the LWG has been very busy trying to process the backlog of new proposals forwarded by the Library Evolution Working Group (LEWG). One of the main tasks at the Kona meeting was to review the “Ranges Design Cleanup” proposal. The cleanup involves a number of fixes and improvements to the new Ranges library, addressing issues that came up during the review of the previous (much larger) proposal to add the Ranges library, which is one of the biggest additions to the C++20 library (most of the other significant additions to C++20 affect the core language, without much library impact). In fact, I’d say it’s one of the biggest additions to the C++ standard library since the first standard in 1998. The Ranges library work overhauls the parts of the standard that originated in the Standard Template Library (STL), i.e. iterators, algorithms, and containers, to re-specify them in terms of C++ Concepts. This has been a multi-year effort that has now landed in the C++20 working draft, following multiple proposals and several meetings of wording review by LWG.

• Save and load Python data with JSON

  JSON stands for JavaScript Object Notation. This format is a popular method of storing data in key-value arrangements so it can be parsed easily later. Don’t let the name fool you, though: You can use JSON in Python—not just JavaScript—as an easy way to store data, and this article demonstrates how to get started.

Android Leftovers

• Agent Smith Malware Infecting Android Apps

• Huawei Renames Android Replacement 'Harmony', Despite Execs Denying It Exists

• How to Back up Your Personal Data on iOS and Android

• Accelerate Android Build Times for Faster Time to Market

• After LG G6, LG V30 ThinQ Android Pie (9.0) beta build leaks

• Redmi S2/Redmi Y2 Android Pie 9.0 update rolling out once again, brings June security patch

• Motorola Moto G6 Android Pie (9.0) update arrives on US unlocked variants

• Early Android Pie beta build leaks for the LG V30, still no release info

• Huawei Y9 (2019) joins Honor 8X as its EMUI 9 (Android Pie) update goes on hold as well

• Huawei Says It's Not Actually Working on an Android Replacement

• TCL 55-inch P8E 4K AI Smart Android LED TV Launched in India, Priced at Rs. 40,990

• Blaupunkt launches 4K QLED Android 7 smart TV in India priced at Rs 69,999

• Exclusive: Android Q will bring One UI 2.0, Galaxy S11 will get One UI 2.1

• The Pixel 4 could be taking advantage of this new Android Q feature

• These Samsung Android Tablets are Up to 43% Off for Prime Day 2019, Deals from Just $119.99

• Note 10 may be the fastest Android alive as new Exynos 9825 and Snapdragon 855+ benchmarks leak

• Return of the Keyboard: This New Android Is Actually Not a BlackBerry

• The Nokia 2.2 offers the latest advances in AI and Android™ at an accessible price, now shipping in the United States

• Top best karaoke apps for Android

• The best remaining Amazon Prime Day Android phones that aren't sold out or backordered

SysAdmin Day Sale: Get 60% off on Linux Foundation Certification & Training

To celebrate the Sysadmin day, the Linux Foundation is giving 60% off on its training courses on sysadmin, Kubernetes, Hyperledger etc. Advance your career with these certifications.

Raspberry Pi 4 and Raspbian Buster: Hands-On

In my previous two posts I looked at the Raspberry Pi 4 hardware and at the procedure for installing and booting the new Raspbian Buster Operating System on the Pi 4. With those basic steps out of the way, now it's time to look at both the hardware and software in more detail. The first thing I want to mention is that when I wrote the previous post about Raspbian, I had not noticed that there is an updated version of Raspbian Buster (2019-07-10) available. This version was released sort of quietly (without the usual blog post announcing and explaining it), although there are release notes for it if you are interested. This release is extremely good news, because it fixes some of the biggest problems that I mentioned in my previous post...