strong reference

Java Virtual Machine Summary: Java Virtual MachineJvm Memory Model UProgram counters UJavaStack(Virtual Machine Stack) ULocal method Stack UJavaHeap UMethod Area and Its runtime poolGarbage Collection Mechanism U New Generation and old generation U

Brief introductionFirst of all, you should know that Java has provided four reference types from 1.2, namely their references (strongreference), soft references (softreference), weak references (WeakReference), and Phantomreference ( Virtual

Garbage collection and several common garbage collection algorithms and several garbage collection algorithmsPreface: First, think about three things that need to be done by Garbage Collection (GC ). 1) What memory needs to be recycled? 2) When will

Talking about the principle of LightRefBase in implementing object count management in Android reference count 1), this article will analyze the heavyweight reference base class: RefBase implementation and its role. The following is a class diagram

I. Java garbage collection mechanismJava's garbage collection mechanism (Java garbage collection) is the ability of a Java virtual machine to dynamically reclaim the heap memory space occupied by objects without any references in an idle time, in an

JVM garbage collection algorithm summary and summary Let's take a look at the memory model when the JVM virtual machine is running: 1. Method Area Perm (permanent generation, non-heap) 2. Virtual Machine Stack 3. Local method stack (Native method)

The automatic reference count (Automatic Reference counting) is referred to as arc, which is Swift's tracking and management of application memory. Similar to the GC in Java, but not quite the same.Arc is the instance of the reference number 0,arc

Preface overviewIn previous versions of JDK1.2, when an object was not referenced by any variable, the program could no longer use the object. This is like in daily life, after buying a certain item from the store, if it is useful, keep it, or throw

In Java, three reference classes are defined in the Java.lang.ref package, namely soft, weak, and virtual references. These 3 classes provide a convenient mechanism for interacting with garbage collection mechanisms and providing a mechanism for

#import "ViewController.h"/*One of the biggest benefits of using block is that you can access external variables at any time in your code blockFor example, you declare a block of code in a method in the A.class class. You can call the member

Related parameters of @propertBecause now Xcode is using arc by default so now the analysis is mainly based on arc.What are the parameters of [email protected]?First group:Memory management featuresRetain assign copy strong weak unsafe_unretained

TurnA good Java programmer must understand how the GC works, how to optimize GC performance, how to interact with the GC in a limited way, and some applications that have higher performance requirements, such as embedded systems, real-time systems,

Resourceshttp://blog.csdn.net/pingchangtan367/article/details/14000315http://blog.csdn.net/xdrt81y/article/details/9720121First @property is to declare the object with this instance, // in BaseClass.h @interface baseclass:nsobject{ @ Public

Source: Bole Online-Keyboard kite Links: http://ios.jobbole.com/89330/ Click → apply to join Bole Online column author In fact, always want to tidy up JS and oc interaction, but there is no suitable opportunity, today by the

1. Static memoryStatic memory is the memory allocated by the compiler when the program starts running, and its allocation is done at the beginning of the program's compilation, without consuming CPU resources.A variety of variables in the program,

A recent opportunity to get a comprehensive overview of the properties of iOS:IOS @property and @synthesize help us easily generate object getter and setter methods to accomplish the assignment and access of objects. But if we want to animate the

In the Objective-c arc mode, see the following codeID OBJC =[[nsobject Alloc]init];Here the ID is strongly referenced by defaultIn the case of a strong reference, there are times when a circular reference is required, and weak is needed to help.int

Refbase provides a function: Extendobjectlifetime (int32_t mode); The value that is used to set the Mflags in the constructor.and defines an enumeration:enum {Object_lifetime_weak = 0x0001; Binary as B01Object_lifetime_forever = 0x0003; The binary

    weakly Use pointers to resolve shared_ptr caused by circular references to prevent memory leaks! "* * *" The Circular reference is caused by the smart pointer shared_ptr, the following is the diagram of the use of shared_ptr to cause circular

This article simply tells about the problem of memory leaks when using handler normally.What is a memory leak? Plain English say is allocated out of memory, recycling not back. Severe memory is not sufficient for oom. Here's a look at the code that