use the operating system
Tài liệu THE OPERATING SYSTEM MACHINE LEVEL-6 docx
... 0);// Close the filesclose(infd);close(outfd);Figure 6-36. A program fragment for copying a file using the UNIX system calls. This fragment is in C because Java hides the low-level system calls ... hardware)ContextValidPhysicalpageVirtualpagetagFlags(b)(c)Format isentirelydefined by the operating system Translation table (Operating system) TSB (MMU + sofware)ContextEntry 0 is sharedby all virtual pagesending ... main classp = new producer( ); // create the producerc = new consumer( ); // create the consumerp.start( ); // start the producerc.start( ); // start the consumer}// This is a utility function...
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The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System
... tasks.Many other operating systems have met with this problem. Often these systems solve the problem by using insideknowledge of the algorithms used to manage secondary storage. Unfortunately, the Mach ... architectures.Today, the concept of an extensible operating system is once again gaining acceptance this time as the solutionto the unconstrained growth of UNIX. During the last 20 years operating systems and their ... message with the server to get access to the array and, ifother clients had already referenced the data of the array, the physical memory cache of the array would be directlyaccessible to the client...
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Programming the Be Operating System-Chapter 9: Messages and Threads
... with system messages—messages generatedand dispatched by the system. The Message Protocols appendix of the Be Bookdefines all the system messages. In short, system messages fall into the followingcategories:Application ... 1) The name and data parameters serve the same purposes as their counterparts in the other Add routines—name serves as an identifier that’s used when later access-ing the data through the use ... 30.0Regardless of whether the user launches AlertMessage from the desktop or from the shell, one window is always opened. The AlertMessage version ofArgvReceived() looks at the value the user typed in...
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Programming the Be Operating System-Chapter 10: Files
... For the Save file panel, the display of the panel comes when the userchooses the Save As item from the File menu. In response to the message issuedby the system to the appropriate MessageReceived() ... control is in the hands of the user. Once the user confirms a choice (whether it’s a file selection in the Openfile panel, a click on the Save button in the Save file panel, or a click on the Can-cel ... create the panel at any time, then display it only in response to the user’s request. For anOpen file panel, that’s typically when the user chooses the Open item from the File menu. For the Save...
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Tài liệu Programming the Be Operating System-Chapter 1: BeOS Programming Overview ppt
... an overview of the object-orientednature of the BeOS. The remainder of the book fills in the details of the names, purposes, and uses of the important and commonly usedclasses. The BControl class ... organizing the files used in a project takes full advantage of the Be graphical user interface.Figure 1-7 shows the window that appears when you use the BeIDE to open the project file for the HelloWorld ... during the execution of a program. Anobject can be added or deleted from the heap without regard for itsplacement in the heap, or for the other contents of the heap. The stack, on the other hand,...
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Tài liệu Programming the Be Operating System-Chapter 2: BeIDE Projects docx
... file with the same name as the project (andthus the same name as the application that will be built from the project). The header file holds the definition of the class derived from the BApplication ... the current state of these characteristics. The font used to draw text in the view and the width of lines that are to be drawn in the view are two examples of thesecharacteristics. The information ... parameter to the BWindow constructor, which comesfrom the HelloWindow constructor, sets the size of the window. The secondparameter is a string that is used as the window’s title. The SimpleWindow...
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Tài liệu Programming the Be Operating System-Chapter 3: BeOS API Overview doc
... toanother window.Class Descriptions and the Be Book The definitive source of information for the many classes that make up the BeOSsoftware kits is the Be class reference by the programmers of the ... to them, some oftheir classes appear throughout the book. See the description of the Support Kitbelow for a specific example concerning the BLocker class.Application Kit The classes of the ... variables are declared—there’s no need to use the new operator.There’s also no need to use the delete operator to destroy such objects. The Constructor section reveals that there are four BRect...
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Tài liệu Programming the Be Operating System-Chapter 4: Windows, Views, and Messages doc
... the time the mouse button was clicked. The values of the point are in the view’s coor-dinate system. For example, if the cursor was over the very top left corner of the view at the time of the mouse ... time of the mouse button click. The window that receives the message calls the BViewhook function MouseDown() of the view the cursor was over at the time of the mouse button click.B_MOUSE_UPReaches ... the user moves the cursor over the window. As the user drags the mouse, repeated B_MOUSE_MOVED messages are issued by the Application Server. As the cursor moves over one window to another, the...
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Tài liệu Programming the Be Operating System-Chapter 5: Drawing ppt
... the user clicks the mouse in the MyDrawView view, MouseDown() makes the system aware of the fact that the viewneeds updating, and the system invokes Draw():void MyDrawView::MouseDown(BPoint ... make use of it. That’s done in the Draw() function, wherea call to MovePenTo() ensures that the drawing will start in the top left corner of the view (and, because the view is the same size as the ... defines one of the fouredges of a rectangle. The values of the left and right members are relative to the left edge of the view that is to hold the rectangle, while the values of the topand bottom...
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Tài liệu Programming the Be Operating System-Chapter 6: Controls and Messages ppt
... bringing it back to the forefront doesn’t cause the border to disappear the update message that the Application Server sends to the MyHelloWindow window results in the calling of the Draw() function ... radiobuttons? Answer: because I use the radio button view only as ameans to group the radio buttons together—I don’t draw to the view. The simple approach of creating a BView on the fly works forthat ... values to the variables to be used in the control’s con-structor• Create the control using new and the control’s constructor• Attach the control to the window by adding it to one of the window’s...
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Tài liệu Programming the Be Operating System-Chapter 7: Menus docx
... as the item’s label when the user pulls down the menu in which the itemappears. The message parameter assigns a message of a particular type to the menu item.When the user chooses the item, the ... given the variable used to represent the sub-menu the name subMenu, it really is nothing more than a BMenu object. The itemsin the Dogs submenu were added the same way as the items in the Animalmenu—by ... are the interface between the user and the program, and are the primarymeans by which a user carries out tasks. A Be program that makes use of menususually places a menubar along the top of the...
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Tài liệu Programming the Be Operating System-Chapter 8: Text ppt
... When the contents of the view a scrollbar isattached to exceed the size of the view, the scrollbar’s knob appears and the scrollbar becomes enabled. As the content of the view increases, the ... fonts.Contradictory as it sounds, the user can change the font that’s used for any of the global system fonts. Figure 8-2 shows that the FontPanel preferences program lets the user pick a different plain, ... allows for the display of text in any font on the user’s computer. Querying the user’s machine for available fonts is a topic covered in the BFontsection of the Interface Kit chapter of the Be Book.Figure...
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Chapter 1 Introduction to Routing and Packet ForwardingRouting Protocols and Concepts quangkien@gmail.com.Topicsl Inside the Router Ÿ Routers are computers Ÿ Router CPU and Memory Ÿ Internetwork Operating System Ÿ Router Bootup Process Ÿ Router Ports doc
... the process of how the router determines which path to use when forwarding a packet.l To determine the best path, the router searches its routing table for a network address that matches the ... will not be used in this curriculum.18Verify the router boot-up processl show version command is used to view information about the router during the bootup process (later). Inside the Routerl ... is on the same network as one of its interfaces and it can sent the packet directly to the destination and not another router.l Since the exit interface is on an directly connected Ethernet...
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- the internetwork operating system
- the unix operating system
- learn the operating system
- most supercomputers use the operating system
- how to use the operating system cd
- use computer operating systems and hardware
- use of the operating system
- use the appropriate operating system or audio
- what are the predominant network operating systems nos in use today
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