sager np9377

The critical section pattern refers to the mode in which only one thread can be executed in a shared range.It is the basis of all other multi-threaded design patterns, so I will first introduce it.Focus on the scope. This mode is called the critical section mode. If you place the eye point on the thread of execution, this mode is calledSingle-thread execution mode. First, let's play a cave drill game. axman, Sager, and pentium4. three of them are at t

I have said this question a few years ago, but today I am again seeing someone asking this question from csdn. We can see that 1% of the people who really understand this question cannot.I once again wrote this question here, hoping that the people who visit my blog can really understand it. Let's take an example. In this example, I use the mysql-essential-5.1.30-win32 version. To run the following commands with me: Mysql> Create Database axman;Mysql> Use axman;Mysql> Create Table axmantest (->

, final stringbuffer sb = new stringbuffer ("axman ");SB = new stringbuffer ("Sager"); // error. SB cannot point to other objects.SB. append ("was changed! "); // The earth object to which sb points can be modified. Let's first talk about final variable initialization: Many articles have said this: the initialization can be in two places: one is its definition, and the other is in the constructor. Either of them can be selected.Nonsense!Final variable

modified. For example: Final stringbuffer sb = new stringbuffer ("axman "); SB = new stringbuffer ("Sager"); // error. SB cannot point to other objects. SB. append ("was changed! "); // The earth object to which sb points can be modified. Let's first talk about final variable initialization: Many articles have said this: the initialization can be in two places: one is its definition, and the other is in the constructor. Either of them can be sel

;connect (); 98 //........ }100 virtual void SendMessage (String message) {101 102 messagerimp->playsound (); 103/ /********104 Messagerimp->writetext (); 105//..... 106}107 virtual void sendpicture (image image) {108 109 messagerimp->playsound (); 110//* 111 Messagerimp->drawshape (); 112//..... 113}114};115 117 118 119 void Process () {120//runtime assembly 121 messagerimp* Mimp=new Pcmessagerimp (); 122 Mes Sager *m =new Messager (MIMP); 123

modified.such as: final StringBuffer sb = new StringBuffer ("Axman");SB = new StringBuffer ("Sager");//error, SB can no longer point to other objects.Sb.append ("was changed!"); SB-pointed ground like itself can be modified.First, the final variable is initialized:Many articles say this: its initialization can be in two places, one is its definition, and the other is in the constructor, the two can only be selected.Nonsense!The final variable can be