Chapter 10
... step) for references to external library function calls When an external function call is found, the link editor searches for the corresponding executable code that implements the function ...
... step) for references to external library function calls When an external function call is found, the link editor searches for the corresponding executable code that implements the function ...
Welcome [mll.csie.ntu.edu.tw]
... • Program that makes it easier for app developers to program than the raw complex hardware – How? Present good abstractions (interfaces) to SW above – What are the “abstractions” for CPU/Memory/Disk/Network? ...
... • Program that makes it easier for app developers to program than the raw complex hardware – How? Present good abstractions (interfaces) to SW above – What are the “abstractions” for CPU/Memory/Disk/Network? ...
bt0070 - SMU Assignments
... Q1. What is an Operating System? Explain the functions of OS. Answer: Answer: Operating System is a System Software (Set of system programs) which provides an environment to help the user to execute the programs. An operating system (OS) is a software program that manages the hardware and software r ...
... Q1. What is an Operating System? Explain the functions of OS. Answer: Answer: Operating System is a System Software (Set of system programs) which provides an environment to help the user to execute the programs. An operating system (OS) is a software program that manages the hardware and software r ...
Operating Systems I: Programming Tools
... compiler or assembler source code file with the same name. BEWARE: using implied dependencies requires that you use MACROS to pass necessary flags If no dependency file is specified, only implied dependencies are used If no target is specified, the first dependency in the file is the default ...
... compiler or assembler source code file with the same name. BEWARE: using implied dependencies requires that you use MACROS to pass necessary flags If no dependency file is specified, only implied dependencies are used If no target is specified, the first dependency in the file is the default ...
Compiling Compiling a class Compiling a program Compiled Kotlin
... The Kotlin compiler compiles each class to an object file. in file point.kt ...
... The Kotlin compiler compiles each class to an object file. in file point.kt ...
HW2 Solution 1. What are the advantages of using a higher
... 4. What are the advantages and disadvantages of using a microkernel approach? One benefit of the microkernel approach is ease of extending the operating system. All new services are added to user space and consequently do not require modification of the kernel. The microkernel also provides more sec ...
... 4. What are the advantages and disadvantages of using a microkernel approach? One benefit of the microkernel approach is ease of extending the operating system. All new services are added to user space and consequently do not require modification of the kernel. The microkernel also provides more sec ...
Programming Development Environment
... acquisitions etc. are provided in the PDE, and do need to be coded by the programmer All such elements are linked together into a single, executable object program That is the work of the system’s linker For C or C++ on Unix the link step is frequently hidden, i.e. not visible to the programmer ...
... acquisitions etc. are provided in the PDE, and do need to be coded by the programmer All such elements are linked together into a single, executable object program That is the work of the system’s linker For C or C++ on Unix the link step is frequently hidden, i.e. not visible to the programmer ...
General information:
... Main memory access usually more than 1 cycle - memory ACCESS TIME is critical! EXECUTION contains several steps - may require MEMORY ACCESS. Performance depends heavily on: • How many instructions to execute program or function? • How many cycles per instruction? Thus, PERFORMANCE ENHANCEMENTS: inst ...
... Main memory access usually more than 1 cycle - memory ACCESS TIME is critical! EXECUTION contains several steps - may require MEMORY ACCESS. Performance depends heavily on: • How many instructions to execute program or function? • How many cycles per instruction? Thus, PERFORMANCE ENHANCEMENTS: inst ...
Lecture 2
... • System call causes a TRAP to switch from user to kernel mode and starts execution at interrupt vector location for TRAP instruction. • Operating system looks at requested operation and any parameters passed by the application. • Dispatches the correct system call handler through a table of pointer ...
... • System call causes a TRAP to switch from user to kernel mode and starts execution at interrupt vector location for TRAP instruction. • Operating system looks at requested operation and any parameters passed by the application. • Dispatches the correct system call handler through a table of pointer ...
OPERATING-SYSTEM
... IT occurs when a group of processes each have granted exclusive access to some resources,and each one wants yet another resources that belongs to another process in the group. all of them are blocked and none will ever run again. ...
... IT occurs when a group of processes each have granted exclusive access to some resources,and each one wants yet another resources that belongs to another process in the group. all of them are blocked and none will ever run again. ...
GUIs - DCU School of Computing
... Interfaces, subclasses, and abstract classes not only facilitate re-use of code we write ourselves, but also facilitate code re-use on a large scale by making it easier to write libraries of related and interacting classes. Two important examples are libraries for (i) collections, and (ii) GUIs (gra ...
... Interfaces, subclasses, and abstract classes not only facilitate re-use of code we write ourselves, but also facilitate code re-use on a large scale by making it easier to write libraries of related and interacting classes. Two important examples are libraries for (i) collections, and (ii) GUIs (gra ...
Chap8.doc
... __ 7. Popular operating systems in use today include UNIX, DOS, PASCAL, and Windows 98. __ 8. New versions of an operating system usually are downward compatible. __ 9. Spooling causes a report to first be written to storage or memory before it is printed on the printer. __10. A foreground applicati ...
... __ 7. Popular operating systems in use today include UNIX, DOS, PASCAL, and Windows 98. __ 8. New versions of an operating system usually are downward compatible. __ 9. Spooling causes a report to first be written to storage or memory before it is printed on the printer. __10. A foreground applicati ...
fund8que.doc
... __ 7. Popular operating systems in use today include UNIX, DOS, PASCAL, and Windows 98. __ 8. New versions of an operating system usually are downward compatible. __ 9. Spooling causes a report to first be written to storage or memory before it is printed on the printer. __10. A foreground applicati ...
... __ 7. Popular operating systems in use today include UNIX, DOS, PASCAL, and Windows 98. __ 8. New versions of an operating system usually are downward compatible. __ 9. Spooling causes a report to first be written to storage or memory before it is printed on the printer. __10. A foreground applicati ...
Ch 5 Quick Quiz
... Ch 5 Quick Quiz - MC ___ 6. Which is not a common function of an operating system? a. booting the computer b. compressing files c. managing resources d. memory management ...
... Ch 5 Quick Quiz - MC ___ 6. Which is not a common function of an operating system? a. booting the computer b. compressing files c. managing resources d. memory management ...
Power Point version
... object file, which contains machine code, data, and information needed to place instructions in memory. • The assembler must map the labels in assembly code to addresses in machine code. This information is kept in the symbol table. • After converting all labels to addresses the symbol table contain ...
... object file, which contains machine code, data, and information needed to place instructions in memory. • The assembler must map the labels in assembly code to addresses in machine code. This information is kept in the symbol table. • After converting all labels to addresses the symbol table contain ...
Chapter 1 Introduction to Computers, Programming, and C++
... C++ was developed by Bjarne Stroustrup at Bell Labs during 1983-1985. C++ added a number of features that improved the C language. Most importantly, it added the support of using classes for object-oriented programming. ...
... C++ was developed by Bjarne Stroustrup at Bell Labs during 1983-1985. C++ added a number of features that improved the C language. Most importantly, it added the support of using classes for object-oriented programming. ...
Programming Life Cycle (Compilers)
... A music box is set with one melody – similar to a microwave's preset computer chip ...
... A music box is set with one melody – similar to a microwave's preset computer chip ...
application programs
... some of the details of the underlying hardware for such I/O. All the user sees is that the I/O has been performed, without those details. Communications There are instances where processes need to communicate with each other to exchange information. It may be between processes running on the same ...
... some of the details of the underlying hardware for such I/O. All the user sees is that the I/O has been performed, without those details. Communications There are instances where processes need to communicate with each other to exchange information. It may be between processes running on the same ...
An Introduction to Operating Systems
... OS provides an environment where the user can conveniently run programs. The user does not have to worry about memory allocation or CPU scheduling. ¾ I/O Operations Each program requires input and produces output. The OS hides some of the details of the underlying hardware for such I/O. All the user ...
... OS provides an environment where the user can conveniently run programs. The user does not have to worry about memory allocation or CPU scheduling. ¾ I/O Operations Each program requires input and produces output. The OS hides some of the details of the underlying hardware for such I/O. All the user ...
Library (computing)
In computer science, a library is a collection of non-volatile resources used by computer programs, often to develop software. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications. In IBM's OS/360 and its successors they are referred to as partitioned data sets.In computer science, a library is a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked. This means that as long as a higher level program uses a library to make system calls, it does not need to be re-written to implement those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the library-provided behavior via a mechanism of the language. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. What distinguishes the call as being to a library, versus being to another function in the same program, is the way that the code is organized in the system. Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to only be used within that one program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface, and not the internal details of the library.The value of a library is the reuse of the behavior. When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. Libraries encourage the sharing of code in a modular fashion, and ease the distribution of the code. The behavior implemented by a library can be connected to the invoking program at different program lifecycle phases. If the code of the library is accessed during the build of the invoking program, then the library is called a static library. An alternative is to build the executable of the invoking program and distribute that, independently from the library implementation. The library behavior is connected after the executable has been invoked to be executed, either as part of the process of starting the execution, or in the middle of execution. In this case the library is called a dynamic library. A dynamic library can be loaded and linked as part of preparing a program for execution, by the linker. Alternatively, in the middle of execution, an application may explicitly request that a module be loaded.Most compiled languages have a standard library although programmers can also create their own custom libraries. Most modern software systems provide libraries that implement the majority of system services. Such libraries have commoditized the services which a modern application requires. As such, most code used by modern applications is provided in these system libraries.