A brief introduction to this blog

Hi everyone reading this blog,


Before starting to publish articles, I would like to give brief introduction about "Why this blog?".


When I explored Internet for knowledge about C++, OO Design, Design patterns, OS, Threads, Synchronization, etc, I found good articles, but I felt things were scattered and confusing at times.


Example 1: Mutex Vs. Semaphore - Some claim that Binary semaphore is same as Mutex and some argue that they are not same.
Example 2: Design patterns - Even with simple examples in many articles, difficult to grasp and think where to apply when a problem is given.


With this, I got an idea as to why not me start a blog and stitch all the information from various books, articles and Internet sites together and create a blog to give in depth information about below topics and not restricted to:


1. C++
2. STL
3. Design patterns
4. UML
5. OO Design
6. OS Concepts
7. Linux
8. Synchronization


With the above introduction, I would like to start off with articles about Synchronization. Every week (On Sunday),  I would post the articles. All your feedback and comments are welcome.


Happy Learning!

Comments

Post a Comment

Popular posts from this blog

Synchronization primitives: Mutex and Semaphore (Serialization & Mutex problems using Semaphore) - Article 6

Hi Friends, In the previous articles, we have gained knowledge about Mutex and Semaphore. In this article, we shall see how a Semaphore can be used to solve serialization problem and Mutual Exclusion (Mutex) problem. Serialization problem: Thread 1: Event A; // Could be any code Thread 2: Event B; // Could be any code The problem is, we have to ensure that Event B or a particular code or instructions should always be executed after Event A or some other particular code. Basically, we are serializing the instructions irrespective of how the threads are scheduled to run. Solution: There are no resources here, we need to just signal, initialize Semaphore to 0. Semaphore SignalThread2 = 0; Thread 1: Event A; SignalThread2.signal(); Thread 2: SignalThread2.wait(); Event B; The code for Thread 1 and Thread 2 is as above. Irrespective of which thread is scheduled, Event A always occurs before Event B. How? Let's say Thread 2 is scheduled first, it executes
Read more

Synchronization: Discussion about Mutex and Semaphore - Article 1

This is the first article in the series about Mutex and Semaphore. In my blog, I shall follow below sequence: 1. First, I will try to explain the concept. 2. Next, we shall see what problems the concept may solve or what problems may occur if the concept is not applied. 3. Finally, we shall see how the concept will solve the problem. In this article, I will try to cover what Synchronization in Computers is all about and different problems that can occur if Synchronization is not used. First we will see the real world examples and see what Synchronization is all about. Dictionary meaning is as below: 1. To cause to occur or operate with exact coincidence in time or rate. 2. Synchronization is the coordination of events to operate a system in unison. Let's try to understand in depth. Consider below examples: 1. Imagine soldiers doing march past in a parade. - They operate at the same time and everybody march in order. - They appear synchronized. How do they do it? - Every
Read more

Copy constructor in C++ (Part 2)

Now, the important question comes is regarding the signature of copy constructor. That is, why copy constructor takes a reference as parameter. Let's copy by value from previous example. CopyDemo(const CopyDemo obj) {     ptr = new int;     *ptr = *obj.ptr; } Now from main(), CopyDemo o2 = o1; Let me explain in detail. We have called copy constructor to copy o1 to o2. But, since we are passing by value, first o1 has to be copied to obj. So internally, statement will be, const CopyDemo obj = o1; Now, what happens is again copy constructor is invoked. Already, we can sense some problem, copy constructor is called again. Internally, the statement is repeated again. const CopyDemo obj = o1; This goes into a recursive loop and following statements get repeated till stack overflow happens and ultimately program crashes. const CopyDemo obj = o1; const CopyDemo obj = o1; const CopyDemo obj = o1; . . .
Read more