Chapter 1
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
Introduction
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
Chapter 1 Introduction
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
Introduction Chapter 1 Introduction What is an Operating System
... Introduction 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
... Introduction 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
Porting existing software - International Union of Crystallography
... xlc/xlf compiler specific work obsolete. ...
... xlc/xlf compiler specific work obsolete. ...
slides
... POSIX API for POSIX-based systems (including virtually all versions of UNIX, Linux, and Mac OS X). Java API for the Java virtual machine (JVM). ...
... POSIX API for POSIX-based systems (including virtually all versions of UNIX, Linux, and Mac OS X). Java API for the Java virtual machine (JVM). ...
Here is the Original File
... operating system as one large device. This device can then be virtually split up into any number of smaller logical devices and used as partitions of any size. IBM developed the Journaling File System (JFS) for AIX as a way to minimize recovery time from a power failure or system halt. JFS records c ...
... operating system as one large device. This device can then be virtually split up into any number of smaller logical devices and used as partitions of any size. IBM developed the Journaling File System (JFS) for AIX as a way to minimize recovery time from a power failure or system halt. JFS records c ...
Introduction to Windows NT/2000
... Kernel is object-oriented, uses two sets of objects. dispatcher objects control dispatching and synchronization (events, mutants, mutexes, semaphores, threads and timers). control objects (asynchronous procedure calls, interrupts, power notify, power status, process and profile objects.) ...
... Kernel is object-oriented, uses two sets of objects. dispatcher objects control dispatching and synchronization (events, mutants, mutexes, semaphores, threads and timers). control objects (asynchronous procedure calls, interrupts, power notify, power status, process and profile objects.) ...
Chapter 2.pdf
... • Processor has more than one program to execute • The sequence in which the programs are executed depends on their relative priority and whether they are waiting for I/O • After an interrupt handler completes, control may not return to the program that was executing at the time of the interrupt ...
... • Processor has more than one program to execute • The sequence in which the programs are executed depends on their relative priority and whether they are waiting for I/O • After an interrupt handler completes, control may not return to the program that was executing at the time of the interrupt ...
Processes
... • dynamically allocated variables (malloc, new) • stack variables (C automatic variables, function arguments) – DLLs: libraries that were not compiled or linked with the program • containing code & data, possibly shared with other programs ...
... • dynamically allocated variables (malloc, new) • stack variables (C automatic variables, function arguments) – DLLs: libraries that were not compiled or linked with the program • containing code & data, possibly shared with other programs ...
Adeyl Khan
... Normal processing is temporarily suspended The CPU looks at the interrupt and determines its cause The CPU will either continue processing the Inventory Management program or return to the Payroll program depending upon their priority ...
... Normal processing is temporarily suspended The CPU looks at the interrupt and determines its cause The CPU will either continue processing the Inventory Management program or return to the Payroll program depending upon their priority ...
Operating Systems Principles Lecture 1: Introduction
... Because the user is present and interacting with the computer, the computer system must respond quickly to user requests, otherwise user productivity could suffer. Timesharing systems were developed to multiprogram large number of simultaneous interactive users. ...
... Because the user is present and interacting with the computer, the computer system must respond quickly to user requests, otherwise user productivity could suffer. Timesharing systems were developed to multiprogram large number of simultaneous interactive users. ...
Lesson 2 PowerPoint
... Java is known as a high-level language. A High-Level Programming Language is a language that is easily read and written by humans, and is needed to be translated before a machine can use it. It provided a high level of abstraction from the details of the workings of the computer’s hardware Mos ...
... Java is known as a high-level language. A High-Level Programming Language is a language that is easily read and written by humans, and is needed to be translated before a machine can use it. It provided a high level of abstraction from the details of the workings of the computer’s hardware Mos ...
lec01
... Approached Bill Gates to see if he can build one Gates approached Seattle computer products, bought 86DOS and created MS-DOS Goal: finish quickly and run existing CP/M software OS becomes subroutine library and command executive ...
... Approached Bill Gates to see if he can build one Gates approached Seattle computer products, bought 86DOS and created MS-DOS Goal: finish quickly and run existing CP/M software OS becomes subroutine library and command executive ...
Sandboxing - Syracuse University
... resources, and they cannot see the rest of the resources. Chroot: (e.g., used by ftp) Virtual Machine (Isolated OS) Adding extra access control: the program can SEE everything, but an extra layer of access control is added, such that the program cannot make arbitrary access (even though the OS ...
... resources, and they cannot see the rest of the resources. Chroot: (e.g., used by ftp) Virtual Machine (Isolated OS) Adding extra access control: the program can SEE everything, but an extra layer of access control is added, such that the program cannot make arbitrary access (even though the OS ...
Getting Started with Java
... Java is known as a high-level language. A High-Level Programming Language is a language that is easily read and written by humans, and is needed to be translated before a machine can use it. It provided a high level of abstraction from the details of the workings of the computer’s hardware Mos ...
... Java is known as a high-level language. A High-Level Programming Language is a language that is easily read and written by humans, and is needed to be translated before a machine can use it. It provided a high level of abstraction from the details of the workings of the computer’s hardware Mos ...
Language Translators
... They are machine oriented: an assembly language program written for one machine will not work on any other type of machine unless they happen to use the same processor ...
... They are machine oriented: an assembly language program written for one machine will not work on any other type of machine unless they happen to use the same processor ...
slides
... • Interpreter begins executing code using the abstract syntax tree (AST) • Compiler begins translating code into machine language – Might involve translating AST into a simpler intermediate representation (IR) – Eventually produce object code ...
... • Interpreter begins executing code using the abstract syntax tree (AST) • Compiler begins translating code into machine language – Might involve translating AST into a simpler intermediate representation (IR) – Eventually produce object code ...
Lecture 22 File-System Interface
... collection of similar records treated as a single entity have unique file names may restrict access ...
... collection of similar records treated as a single entity have unique file names may restrict access ...
What is Operating System (OS)
... a process. When it executes, it loads instructions and data from memory. Memory also needs to be shared between the processes currently residing in main memory. Because a process can be placed almost anywhere in memory in most systems, it needs some way to reach the information in the memory regardl ...
... a process. When it executes, it loads instructions and data from memory. Memory also needs to be shared between the processes currently residing in main memory. Because a process can be placed almost anywhere in memory in most systems, it needs some way to reach the information in the memory regardl ...
GET439 – Enterprise Technologies Lab 1
... One of the most important tools for designing, building and testing software is the Integrated Development Environment, or IDE. The IDE is an application development platform used by modern enterprises to design, build and test enterprise software applications; but it is also the repository for stor ...
... One of the most important tools for designing, building and testing software is the Integrated Development Environment, or IDE. The IDE is an application development platform used by modern enterprises to design, build and test enterprise software applications; but it is also the repository for stor ...
Najwa Knefati Midterm q
... When they are finished, their priorities revert to their original values. In the example above, a priority-inheritance protocol would allow process L to temporarily inherit the priority of pr ...
... When they are finished, their priorities revert to their original values. In the example above, a priority-inheritance protocol would allow process L to temporarily inherit the priority of pr ...
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.