In modern computing, multithreaded programming is a common technique that allows programs to execute multiple tasks simultaneously, thereby improving efficiency and responsiveness. In C, we can use the POSIX Threads (pthread) library to implement multithreaded programming. This article will introduce the fundamentals of multithreading in C and demonstrate with example code. 1. What is Multithreading? … Read more
Shared memory is an inter-process communication (IPC) mechanism that allows multiple processes to access the same memory area. It is highly efficient because data does not need to be copied between processes but is read and written directly in the shared memory. In this article, we will introduce how to use shared memory in the … Read more
When it comes to learning embedded systems, there is undoubtedly a lot to learn and remember. Writing this down helps me reconstruct problems and receive guidance from peers. 1. What is GDB? During our programming journey, we inevitably encounter program crashes, variable anomalies, and logical errors. This can be particularly frustrating for technical support workers … Read more
Cover ImageThe Southern Right Whale Dolphin (Lissodelphis peronii) is a unique species of dolphin that only lives in the Southern Hemisphere, characterized by the absence of a dorsal fin and its black and white coloration.Main ContentIn Linux systems, we often need to execute the sync command after modifying files to save the changes. Why is … Read more
In C, the atoi function is a commonly used function for converting strings to integers. This function is particularly useful when handling string input, especially when it is necessary to convert user-inputted numeric strings to integer types. This article will provide a detailed explanation of the usage of the atoi function to help readers better … Read more
Of course! Arrays are one of the most fundamental and commonly used data structures in C language. Understanding the underlying principles of arrays not only helps you write efficient programs but also lays a solid foundation for learning pointers, memory management, and more. 1. What is an Array? An array is a group of contiguous … Read more
This is a very critical and often confused knowledge point in C language: <span>char*</span>, character arrays (such as <span>char str[]</span>), and the relationship between strings. Let’s thoroughly clarify their essence, differences, and connections. 1. Basic Concepts of the Three Term Meaning <span>char*</span> Character pointer, pointing to the address of one (or more) <span>char</span> type variables … Read more
Reverse Engineering of a Parameterless C Function with Return Value in 32-bit Below is a simple example of a C function that does not take any parameters but returns an integer value. Additionally, I provide step-by-step instructions for writing and viewing its assembly code using Visual Studio 2022. C Function #include <stdio.h> // Definition of … Read more
A Complete Guide to Bit Manipulation in C 1. Basic Concepts of Bit Manipulation Bit manipulation is a technique that directly operates on the binary bits of integers in memory. The C language provides six bitwise operators: 1. Bitwise AND (&): The result is 1 when both corresponding bits of the operands are 1. 2. … Read more
Dynamic memory allocation in C refers to the process where the program requests memory from the system at runtime, based on its needs, rather than determining the memory size during the compilation phase. This is key to building flexible and scalable programs. Below, I will comprehensively explain the fundamentals of dynamic memory allocation through concepts, … Read more