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From a lighter level, Python's memory management mechanism can be used in three ways.(1) Garbage collection(2) Reference count(3) Memory pool mechanismFirst, garbage collection:Unlike languages like C++,java, Python can assign variables directly

interprocess communication Fork Pipe pie_t usage (pipeline mechanism communication) Each process has a different user address space, the global variables of any one process can not be seen in another process, so the process to exchange data between

Memory management1.1 Memory management1.1.1 C's memory management, and the troubleChar *p = (char *) malloc (100*sizeof (char));This is the dynamic memory allocation of C, we manually and the system to request 100 bytes of memory, or the system in

For an object type, when declaring a property, the attribute's attribute is set to retain or copy, which is different from setting it to assign.The following is an example of the Student class and the MyClass (Class) class to illustrate why you want

What is a circular referenceSimply put, a circular reference is: A retains B, B retains a, and neither a nor B can be released.Why ID is assign and not retainIt can be guessed from the title of the article that the reason ID is assign rather than

Assign: Specifies the setter method with a simple assignment, which is the default action. You can use this property for scalar types, such as int. You can imagine a float, which is not an object, so it can't be retain, copy. Assign specifies the

Learning goals in this chapter: 1. Understand what block is. 2. Understand how block is used. Block is an iOS new program syntax after 4.0, strictly speaking, the concept of block is not the scope of the basic program design, for

Deep copy and shallow copy (mutablecopy and copy) for iOS development Before reading this article, I will first understand the differences between copy and retain. If there are any errors, I hope you will learn more about the differences between

Http://blog.csdn.net/xdrt81y/article/details/24331103Before reading this article, I first want to know the differences between copy and retain. If there are any errors, I hope you can give me more advice: Differences between copy and retain: Copy is

Extreme Challenge: Arithmetic Coding (To) http://blog.csdn.net/hhf383530895/archive/2009/08/24/4478605.aspx We have learned in the previous chapter that Huffman encoding uses an integer binary bit to encode the symbol. In many cases, this method

1. Thread Like the process described earlier, the thread is composed of two parts: 1) A thread kernel object that the operating system uses to manage threads. The kernel object also stores various statistical information about threads, including the

1. socket Functions To execute network I/O, the first thing a process must do is to call the socket function to specify the expected communication protocol type. # Include int socket (int family, int type, int protocol); // return: non-negative

StatementYou are welcome to repost this article, but please respect the author's Labor achievements. repost this article and keep the statement in this box. Thank you.Article Source: http://blog.csdn.net/iukey This is probably because

The advantage of garbage collection is indisputable-improved reliability, separated memory management from class interface design, and reduced the developer's time to track memory management errors. The well-known hanging pointer and Memory leakage

The mutex Kernel Object ensures that a thread exclusively accesses resources. The behavior characteristics of mutex kernel objects are similar to those of key code segments, but they are kernel objects, and key code segments are user mode objects,

(If you encounter the problem of deep copy and shortest copy during encoding today, find this article online and repost it by: Yangchen.) before reading this article, first understand the differences between copy and retain, if there are any errors,

Nonatomic: Non-atomic access, no lock when assigning values to attributes, multi-thread concurrent access will improve performance. If this attribute is not added, both access methods are atomic transaction access by default. (Atomic is a thread

Although boost: scoped_ptr is easy to use, its ability to share ownership is greatly limited, while boost: shared_ptr can solve this limitation. Boost: shared_ptr is a smart pointer that shares ownership.   The Management Mechanism of Boost:

Http://www.allaboutprogram.com opened a new layout: Class Library discussion, hope to be able to explore the popular class library, not only can get the use of experience, but also for their future design class library to specify the direction. ATL (

[Glossary] Reference counting: reference counting is a concept frequently used in modern memory management. Its basic idea is to reference a shared object at the same time by counting multiple different objects. Specifically, when an instance of an