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The text is as follows: First, let's look at the recovery mechanism of. Garbage collection in Flash is used to automatically clear unnecessary variables in the memory. There are two algorithms: Reference count and identify and clear.The reference

The core data structure of Linux network is socket buffer (skb. It represents a message to be sent or processed and runs through the entire protocol stack. 1. Socket Cache Skb consists of two parts: (1) packet data: It stores the data actually

Document directory (1) do not explicitly call system. GC () (2) minimize the use of temporary objects (3) it is best to explicitly set the object to null when it is not used. (4) Try to use stringbuffer instead of string to accumulate the

Basic thread knowledge1. What are the differences and connections between processes and threads?L each process requires at least one thread.A process consists of two parts: the process kernel object and the address space. A thread is also composed

  Memory Management Mechanism Reference count: because there is no garbage collection mechanism in OC, it is based on the reference count collection mechanism. When the reference count is 0, the space is destroyed. That is to say, determine whether

1.1 Reference count Reference Count1.2 Automatic reference count,ARC(Automatic Reference counting) 1 Reference Count Reference count ( Reference Count) is a simple and effective way to manage the object life cycle. When we create A

This article learns from: http://blog.csdn.net/yockie/article/details/84744081. ObjectsIn Python, everything is Object , including 12345 Int constants. Don't believe it?? Use the dir () command to see it.Of course, since they're all called objects.

Description of the problem: in the previous article we know that/sys is the implementation information that includes the kernel and the driver, and the user is able to/sys this interface. This interface allows the user to list the full picture of

Introduction to Smart pointers for C + + smart pointersC + + Many powerful functions rely on pointers to implement, but the pointer is the most error-prone, the most error is that when the object has been freed, and then use the pointer to access

Please note: This article assumes that we are all using Python 3 1. List derivation type You have a list:bag = [1, 2, 3, 4, 5] Now you want to double all the elements to make it look like this: [2, 4, 6, 8, 10] Most beginners, according to

Terminology Explanation: 1. Garbage The so-called rubbish (garbage) is the object that needs to be recycled. As a writer, you can judge that "this variable is no longer needed," but the computer can't. Therefore, if the program refers directly or

------Java Training, Android training, iOS training,. NET training, look forward to communicating with you! -------First, set setThe set collection does not allow the same elements to be included, and if an attempt is made to add two identical

Although boost: scoped_ptr is easy to use, its ability to share ownership is greatly limited, while boost: shared_ptr can solve this limitation. As the name implies, boost: shared_ptr is a smart pointer that can share ownership. First, let's look at

Copy: Create an object with an index count of 1 and release the nsstringIt indicates to nsstring that a copy of the input value is used when the value is assigned. The copy operation is executed by the copy method. This attribute is only valid for

Original article: http://www.codeproject.com/Articles/14117/COM-in-plain-C-Part-4 Use C to construct COM objects with multiple interfaces Download routine-194kb Content Embed sub-objects in our objects How the application obtains the Base Object

The problem stems from a problem with the python-CN Mail List: http://groups.google.it/group/python-cn/browse_thread/thread/758891b4342eb2d9/92c12bf6acd667ac Interestingly, why is the result of SYS. getrefcount (11111111) in python2.4 2, but

Copy: Create an object with an index count of 1 and release the nsstringIt indicates to nsstring that a copy of the input value is used when the value is assigned. The copy operation is executed by the copy method. This attribute is only valid for

First, let's take a look at the freelibraryandexitthread API. Void freelibraryandexitthread (Hmodule,DWORD dwexitcode); Msdn: The freelibraryandexitthread function decrements the reference count of a loaded dynamic-link library (DLL) by one, then

There are many synchronization mechanisms in the Linux kernel. The classic ones include spin_lock (waiting lock), mutex (mutex lock), semaphore (semaphore), and so on. And almost all of them have corresponding rw_xxx (read/write locks), so that the

Shared_ptr Header file: "Boost/shared_ptr.hpp" Almost all programs with slightly complex points require some form of reference counting smart pointers. These smart pointers eliminate the need to write complex logic to control the lifetime of objects