learning the unix operating system pdf
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 ... posted message becomes the next in the queue, the looper invokesDispatchMessage() to pass the message to the target handler. The effect is for the posted message to reach the target handler’s ... sev-eral examples of the creating of messages and the dispatching of these messagesboth by the object that created them and by other objects.Figure 9-1. The inheritance hierarchy for the Application...
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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 ... in either type of panel), a message is automatically sent by the system to the panel’s target. By default the panel’s target is the application object, but thiscan be changed (either in the BFilePanel...
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Tài liệu Module 1: Introduction to Exchange 2000 and the Web Storage System pdf
... 4.0-compliant browser, the data is sent in XML format to the client computer. If the user sorts or queries the data, the operation is performed locally on the client; thereby increasing the process time ... starts and displays the administrator's Inbox. Note the items in the Inbox. These items are stored in the Web Storage System. 4. If the Folder List is not displayed, on the View menu, click ... In the Folder List pane, click Calendar. Note the appointment items in the Calendar. These items are stored in the Web Storage System. 6. In the Folder List pane, click Contacts. Note the...
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Tài liệu Advanced Linux Programming: 7-The /proc File System pdf
... specialfile systems such as the /proc file system, this is none.n The second element is the mount point, the place in the root file system at which the file system contents appear. For the root file system ... and File Systems The /proc file system also contains information about the disk drives present in the system and the file systems mounted from them.7.5.1 File Systems The /proc/filesystems entry ... scheduled to run rather than being blockedin a system call—and the total number of processes on the system .The final entry is the process ID of the process that most recently ran. The /proc/uptime...
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Tài liệu Programming the Be Operating System-Chapter 1: BeOS Programming Overview ppt
... 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, ... such tasks. The zoom-ing and moving of windows is handled by the system, not by the SimpleApp code.This simple demonstration emphasizes the power of the BeOS system software—itis the system software ... window’s tab)• The type of the window (the look and feel of the window)• The behavior of the window (whether it has a resize knob, and so forth)Recall from your C++ background that when the definition...
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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 ... anyresizing of the window. The final BView constructor parameter determines the types of notifications the view is to receive from the system. The Be constantB_WILL_DRAW means that the view should ... stated that the header file that bears the name of the project should hold the declaration of the project’s application class the class derived from the BApplication class. Here you see that the HelloWorld.h...
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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 ... created in the application constructor, the MyHelloWindow constructor is responsible for creating a new view, adding the view to the new window, and then displaying the new window. The new MyHelloWorld...
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Tài liệu Programming the Be Operating System-Chapter 4: Windows, Views, and Messages doc
... 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 click, the point’s ... If the point (100.1, 49.9) is used instead, the result is the same the win-dow’s corner ends up 100 pixels from the left and 50 pixels from the top of the screen. The above scenario begs the ... the window (to the top view), rather thanto another view, so both views are on the same level in the window’s view hierar-chy. The Draw() function of each view type includes code to frame the...
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Tài liệu The Unix Family of Operating pdf
... several versions of Unix. Until a few years ago, there wer e twomain versions: the line of Unix releases that started at AT&T (the latest is System V Release 4), and another from the University ... andwindow systems. Our examples show the bash shell and the GNOME andKDE window environments. We’ve chosen them because they’re popularand make good examples, not because we think they’re always the ... advanced work or set up Unix systems for other users, we rec-ommend learning about a variety of shells and window systems andchoosing the best ones for your needs. The principles explained...
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The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System
... 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 ... 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 ... of the 8th Symposium on Operating System Principles, pages 64-75. December, 1981.[16] Rashid, R.F.From RIG to Accent to Mach: The Evolution of a Network Operating System. In Proceedings of the...
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