1. Initialization process Initialize clock Set the multiplexed IO port of GPIO Set the electrical properties of GPIO Initialize GPIO 2. Understanding volatile initialization registers in C language #define CCM_CCGR0 *((volatile unsigned int *)0x020C4068) Understanding of volatile The volatile keyword has the following uses: (1) Used for synchronization, because the same thing may have multiple […]
Tag: tile
Volatile: The hidden hero of Java concurrent programming
: Just work hard and leave the rest to time : Xiaopozhan Volatile: The invisible hero of Java concurrent programming Preface First: Visibility Issues Second: Prohibit instruction reordering Third: Happens-Before relationship Fourth: Application cases Fifth: Comparison of Volatile, synchronized, and Lock Volatile: synchronized: Lock: Choose the appropriate tool: Sixth: Common misunderstandings and precautions Common misunderstandings: […]
JAVA New Practice 4: Use JAVA to write a map tile download program and merge the tiles into large images in different levels
This article is full of work and uses code directly to show you how to write an autonomous and controllable map tile download program in Java, and merge the tiles into a large image hierarchically so that you can deploy your own tile map in geoserver. The environment covered in this article is as follows: […]
Detailed description of Java memory barriers and a thorough understanding of volatile
Source: Detailed description of Java memory barriers and a thorough understanding of volatile Directory of series articles [JVM Series] Chapter 1 Runtime Data Area [JVM Interview Questions] Chapter 2 From JDK7 to JDK8, why does the JVM use metaspace to replace the permanent generation? [JVM Interview Questions] Chapter 3 Why is the JVM generation age […]
Java concurrent programming-volatile
volatile is a lightweight synchronization mechanism provided by the java virtual machine. It has three important features: Ensure visibility No guarantee of atomicity Disable command rearrangement To understand these three features, you need to have a certain understanding of JMM (JAVA memory model). Main problems solved: In the JVM, each thread will have local memory. […]
C++ Standard Templates (STL) – Type Support (type attributes, is_volatile, is_trivial, is_const)
Type attributes A type attribute defines a compile-time template-based structure for querying or modifying the properties of a type. Attempting to specialize a template defined in the header results in undefined behavior, except that std::common_type can be specialized as described. Templates defined in the header file may be instantiated with incomplete types unless otherwise specified, […]
How to use Tilemap to create enemies (or terrain) and implement single tile damage determination
This article is used to record the problems encountered in a Game Jam and related experience methods. Enemy requirements in the game: The enemy is composed of blocks. If all the blocks are destroyed, the enemy will be defeated. Planning needs: The blocks that make up the enemy are implemented by Tilemap instead of grid […]
Add watermarks to WebGIS tile maps (vector tiles, raster tiles)
Watermark technology Watermark can provide strong evidence of the ownership of products receiving copyright information, and can monitor the spread of protected data, authenticate and control illegal copies, etc. It is also needed in today’s popular online maps Watermark technology protects map data. This article will introduce how to add watermarks to tile maps, including […]
About Volatile, lock, Interlocked and Synchronized in multi-threaded environment
Welcome to like: Collection ?Leave a message Please correct me if there are any mistakes, give people roses, and leave lingering fragrance in your hands! Author of this article: Original by webmote Author’s motto: In the new journey, we face not only technology but also people’s hearts. People’s hearts are immeasurable, and the sea water […]
4 types of type conversion operators in c++ (static_cast, reinterpret_cast, dynamic_cast, const_cast), volatile, RTTI
Table of Contents introduce introduce static_cast introduce use reinterpret_cast introduce use const_cast introduce volatile introduce use dynamic_cast introduce use RTTI (runtime determination of type) introduce typeid operator dynamic_cast operator type_info class Introduction Originally in C, we have already been exposed to a lot of type conversions – implicit type conversions and explicit type conversions Implicit […]