computer operating system on the debian linux

Ngày tải lên: 05/09/2013, 16:11

Ngày tải lên: 31/03/2014, 20:20

Ngày tải lên: 28/06/2014, 02:20

... 20 years operating systems and their environments have undergone dramatic expansion in size, scope and complexity. The Alto operating system [22], a workstation operating system of the early ... their applications. The first is a filesystem with a read/copy -on- write interface, which uses the minimal subset of the memory management interface. The second is an excerpt from the operation ... this example, the shared memory server may be located on either of the clients’ hosts, or on yet another host. In the second frame, each client takes a read fault on the same page of the shared...

Ngày tải lên: 12/09/2012, 15:05

... responses are scored. They are usually written before the tests and then the test is written on the basis of the specifications. After the test is written, the specification should be consulted ... the ground of a carefully constructed test specification. Second, these test items should be carefully taken into consideration regarding the relevance to the course book content and then only ... relevant to the ones that the students have already learnt. * Functional language section This section includes 20 items of business situations. The function of language in these situations is...

Ngày tải lên: 10/04/2013, 14:46

Ngày tải lên: 05/09/2013, 09:38

... are posted to the applica- tion. One by one the application pulls these messages from its queue and handles each by moving one window. While that’s going on, the code that creates the new window ... application connects to the Application Server, and can make use of all the services provided by that server. Tasks handled by the Application Server include the provision of windows, the handling ... handling of the interaction between these windows, and the monitoring and reporting of user events such as mouse button clicks. In short, the Application Server, and indirectly the classes of the Application...

Ngày tải lên: 17/10/2013, 19:15

... control is in the hands of the user. Once the user confirms a choice (whether it’s a file selection in the Open file panel, a click on the Save button in the Save file panel, or a click on the ... invoked only by other MyHelloWindow member functions, so there’s no need to allow outside access to it. Because all of the code from the original version of the MyHelloWindow constructor, with the exception ... code } Almost all of the code found in the original version of the MyHelloWindow con- structor has been moved to InitializeWindow(), so the original, one-argument version of the constructor shrinks...

Ngày tải lên: 20/10/2013, 10:15

... directly on the computer. On the other hand, the TOEFL exam is a long one, and concentrating in front of a computer monitor for hours may be taxing. If you have little experience with computers, ... performed on the exam. You will see your scores for the Listening Comprehension and Reading Comprehension sections. Your Struc- – NOTES ON THE TOEFL – 133 On Test Day The Educational Testing ... all questions are “real” and do your best on all of them. The time you will have for each section will be proportional to the number of questions, so don’t worry that the research questions will...

Ngày tải lên: 01/11/2013, 15:20

Ngày tải lên: 25/11/2013, 11:07

... variable  pthreadcondwait Wait on a condition variable  pthreadcondsignal Release one thread waiting on a condition variable                                                       Figure ... (MMU hardware) Context Valid Physical page Virtual page tag Flags (b) (c) Format is entirely defined by the operating system Translation table (Operating system) TSB (MMU + sofware) Context Entry ... producer( ); // create the producer c = new consumer( ); // create the consumer p.start( ); // start the producer c.start( ); // start the consumer } // This is a utility function for circularly incrementing...

Ngày tải lên: 12/12/2013, 09:15

... is the universal generating function of the system; is the number of subsystems in the system; N sys M is the number of possible states of the system; s G is the performance of the system; ... multi-state system theory to the reliability analysis of the power system is studied. The relationship between the performance of the system and the performance of the batteries is analyzed. The results ... of the battery are defined. The reliability of the power system is estimated by the multi-state system theory. The results show that the system reliability estimated by the traditional system...

Ngày tải lên: 03/01/2014, 19:38

... class). Invoking the BApplication constructor is necessary for a few reasons. The BApplication constructor: ã Connects the application to the Application Server ã Provides the application with a unique ... for the program ã Sets the global variable be_app to point to the new application object The connecting of an application to the Application Server has already been men- tioned. This connection ... environ- ment the operating system can, and does, preempt currently running applications. With preemptive multitasking, the burden of passing control from one program to another falls on the operating...

Ngày tải lên: 26/01/2014, 07:20

... shading added by the BeOS). You’ll treat the large and small versions of an icon separately—editing one ver- sion has no effect on the other version. IconWorld will assign the larger version a resource ... the many BView member functions. These functions are the constructor function, the AttachedToWindow() function, and the Draw() function. The HelloView class defined in the HelloWorld project does ... by the HelloWorld program, the program passes to the HelloView constructor the size and name the view is to have. The HelloView constructor will in turn pass that information on to the BView constructor...

Ngày tải lên: 26/01/2014, 07:20

... application in essence extends the functional- ity of the Be operating system. The system is responsible for calling a hook func- tion, while your application is responsible for defining the functionality ... of non-routine instructions are executed. These instructions ensure that control is properly moved from the calling function to the called function and then back to the calling function. The ... throughout the book. See the description of the Support Kit below for a specific example concerning the BLocker class. Application Kit The classes of the Application Kit communicate with the Application...

Ngày tải lên: 26/01/2014, 07:20

... "MyHelloView"); AddChild(fMyView); BFont theFont = be_plain_font; int32 theSize = 12; SetHelloViewFont(theFont, theSize); Show(); } The call to SetHelloViewFont() results in the about-to-be shown window ... in the above version of the MyHelloWindow constructor, the view’s font information is set twice, almost in succession. The result is that when the view is displayed, the last calls to SetFont() ... at the time of the mouse button click. The window that receives the message calls the BView hook function MouseDown() of the view the cursor was over at the time of the mouse button click. B_MOUSE_UP Reaches...

Ngày tải lên: 26/01/2014, 07:20

... effort on your part. The reason this handy feature works is that the BControl class over- rides the BView class member function KeyDown(), and in turn the BColorControl class overrides the BControl ... selected in the color con- trol. The selection of this color and the drawing of the bar are handled by the MyDrawView version of the MouseDown() routine. Besides overriding the Bview hook function MouseDown(), ... function FillRegion(). Here, the region that was created in the previous snippet is filled with the default B_SOLID_HIGH pattern: FillRegion(aRegion); The BRegion object keeps track of all of the...

Ngày tải lên: 26/01/2014, 07:20

... with that one control. Also, add the control to a window. When the user operates the control (typically by clicking on it, as for a button), the system passes the applica- tion-defined message to the ... want the control on (to check a checkbox or fill in a radio button), invoke the BControl member function SetValue(). Passing SetValue() the Be-defined constant B_CONTROL _ON sets the control to on. ... radio button is turned off. A group of radio buttons must always have one button on, so after the three radio buttons are created, one of them (arbitrarily, the One Beep button) is turned on by calling...

Ngày tải lên: 26/01/2014, 07:20

... two beeping options. A subsequent click on the Beep button sounds the system beep either once or twice, depending on the currently selected menu item. Figure 7-9. A menu with related options 270 Chapter ... function becomes responsible for carrying out the action associated with the menu item. The third BMenuItem constructor parameter, shortcut, is optional. The default value used by the constructor ... drawings. Preparing the window class for a menubar and control Both the push button control and the one menu item require the definition of a message constant: #define BUTTON_BEEP_MSG 'beep' #define...

Ngày tải lên: 26/01/2014, 07:20

... window Fonts 277 object. Pass the BFont constructor one of the three global system fonts and the constructor will return a copy of it to your application: BFont theFont(be_bold_font); The BFont object ... partial listing of the BFont class: class BFont { public: BFont(); BFont(const BFont &font); BFont(const BFont *font); void SetFamilyAndStyle(const font_family family, const font_style style); ... to the right. The following code generates the three strings shown in Figure 8-3: BFont theFont(be_plain_font); theFont.SetSize(24.0); theFont.SetShear(45.0); theView->SetFont(&theFont); theView->MovePenTo(110.0,...

Ngày tải lên: 26/01/2014, 07:20