Extending Python
... To check whether the extension module is still valid C code, we compile as gcc -c numfac.c. To create a shareable object (file with extension .so), we create a script setup.py: from distutils.core import setup, Extension # for using numfac.c : MOD = ’NumFac’ setup(name=MOD,ext_modules=[Extension(MOD ...
... To check whether the extension module is still valid C code, we compile as gcc -c numfac.c. To create a shareable object (file with extension .so), we create a script setup.py: from distutils.core import setup, Extension # for using numfac.c : MOD = ’NumFac’ setup(name=MOD,ext_modules=[Extension(MOD ...
Threads - ukiacrew it
... Thread library creates another user thread to do system call (5) (c) Sistem call 1 is unblocked (1), preempt the current kernel thread (2), do upcall to thread library (3) Preempt the new user thread(4) Resume the last blocked user thread. Operating System Concepts ...
... Thread library creates another user thread to do system call (5) (c) Sistem call 1 is unblocked (1), preempt the current kernel thread (2), do upcall to thread library (3) Preempt the new user thread(4) Resume the last blocked user thread. Operating System Concepts ...
Introduction to Java - New Age International
... any platform that has Java interpreter. This portability is because of Java wide library—the libraries that are a part of the system defined portable interfaces. For example, there is an abstract windows class and implementation of it for UNIX, Windows and the Macintosh. Java authors quoted that—“un ...
... any platform that has Java interpreter. This portability is because of Java wide library—the libraries that are a part of the system defined portable interfaces. For example, there is an abstract windows class and implementation of it for UNIX, Windows and the Macintosh. Java authors quoted that—“un ...
FreeBSD for the Linux user
... FTP install directories, floppy images, and ISO images for CDROMs with one command. • “make release” is used by many large companies to produce special versions of FreeBSD with special patches or additional software installed by default. • It is also the well documented way in which the release engi ...
... FTP install directories, floppy images, and ISO images for CDROMs with one command. • “make release” is used by many large companies to produce special versions of FreeBSD with special patches or additional software installed by default. • It is also the well documented way in which the release engi ...
Introduction to PYTHON
... integrate with Java and .NET components, can communicate over frameworks such as COM, can interface with devices over serial ports. The main disadvantage, however, is that numerically-intensive programs written in Python typically run slower than those in compiled languages. These integrations make ...
... integrate with Java and .NET components, can communicate over frameworks such as COM, can interface with devices over serial ports. The main disadvantage, however, is that numerically-intensive programs written in Python typically run slower than those in compiled languages. These integrations make ...
Figure 5.01 - Texas A&M University
... A default signal handler that is run by the kernel when handling that signal. ...
... A default signal handler that is run by the kernel when handling that signal. ...
Threading
... allow multiple executions of streams. In many respect, threads are popular way to improve application through parallelism. The CPU switches rapidly back and forth among the threads giving illusion that the threads are running in parallel. Like a traditional process i.e., process with one thread, a t ...
... allow multiple executions of streams. In many respect, threads are popular way to improve application through parallelism. The CPU switches rapidly back and forth among the threads giving illusion that the threads are running in parallel. Like a traditional process i.e., process with one thread, a t ...
Book 2.indb
... Introduction An Operating System (OS) is a collection of programs that acts as an interface between a user of a computer and the computer hardware. The purpose of an operating system is to provide an environment in which a user may execute the programs. Operating Systems are viewed as resource manag ...
... Introduction An Operating System (OS) is a collection of programs that acts as an interface between a user of a computer and the computer hardware. The purpose of an operating system is to provide an environment in which a user may execute the programs. Operating Systems are viewed as resource manag ...
Software I: Utilities and Internals
... (operating system core, which allocates and control resources such as CPU time, memory and I/O devices). • UNIX includes: – kernel – tools, including compilers, editors, etc. – shell, which includes its own programming language ...
... (operating system core, which allocates and control resources such as CPU time, memory and I/O devices). • UNIX includes: – kernel – tools, including compilers, editors, etc. – shell, which includes its own programming language ...
Transaction Processing Facility
... possible as no active piece of work modifies any program. The default is to run on the main I-stream which is given as the lowest numbered I-stream found during IPL. However users and/or programs can initiate work on other I-streams via internal mechanisms in the API which let the caller dictate whi ...
... possible as no active piece of work modifies any program. The default is to run on the main I-stream which is given as the lowest numbered I-stream found during IPL. However users and/or programs can initiate work on other I-streams via internal mechanisms in the API which let the caller dictate whi ...
Nachos OS
... • The above code completes the job of forking off the threads. Fork() allocates a stack for the thread which invokes it, and adds it to the ready list maintained by the scheduler (see scheduler.cc in code/threads ). "somefunction" is the name of the function that the thread will execute upon occup ...
... • The above code completes the job of forking off the threads. Fork() allocates a stack for the thread which invokes it, and adds it to the ready list maintained by the scheduler (see scheduler.cc in code/threads ). "somefunction" is the name of the function that the thread will execute upon occup ...
A Virtual Machine Introspection Based Architecture for Intrusion
... A virtual machine monitor (VMM) is a thin layer of software that runs directly on the hardware of a machine. The VMM exports a virtual machine abstraction (VM) that resembles the underlying hardware. This abstraction models the hardware closely enough that software which would run on the underlying ...
... A virtual machine monitor (VMM) is a thin layer of software that runs directly on the hardware of a machine. The VMM exports a virtual machine abstraction (VM) that resembles the underlying hardware. This abstraction models the hardware closely enough that software which would run on the underlying ...
Advanced Operating System
... The primary goal of an operating system is a convenience for the user. Operating systems exit because they are supposed to make it easier to compute with an operating system than without an operating system. This is particularly clear when you look at operating system for small personal computers. A ...
... The primary goal of an operating system is a convenience for the user. Operating systems exit because they are supposed to make it easier to compute with an operating system than without an operating system. This is particularly clear when you look at operating system for small personal computers. A ...
Distributed Systems2. Java Threads
... • It is a single control-flow within a process • Multithreading like Multitasking • Execution of Java program: JVM creates a thread that executes the main method – Other threads can be dynamically created ...
... • It is a single control-flow within a process • Multithreading like Multitasking • Execution of Java program: JVM creates a thread that executes the main method – Other threads can be dynamically created ...
MULTITHREADING A multithreaded program contains two or more
... synchronization: the monitor. The monitor is a control mechanism first defined by C.A.R. Hoare. You can think of a monitor as a very small box that can hold only one thread. Once a thread enters a monitor, all other threads must wait until that thread exits the monitor. In this way, a monitor can be ...
... synchronization: the monitor. The monitor is a control mechanism first defined by C.A.R. Hoare. You can think of a monitor as a very small box that can hold only one thread. Once a thread enters a monitor, all other threads must wait until that thread exits the monitor. In this way, a monitor can be ...
Chapter 4: Threads
... Avoid the use of global and static variables Any information required to be safe is stored in buffers allocated by the call ...
... Avoid the use of global and static variables Any information required to be safe is stored in buffers allocated by the call ...
Threads - Wikispaces
... A Thread library provides the programmer with an API for creating and managing threads ...
... A Thread library provides the programmer with an API for creating and managing threads ...
Nachos Introduction
... machine emulator. You would need to look at some of the header files in this directory, but don’t modify anything here. ...
... machine emulator. You would need to look at some of the header files in this directory, but don’t modify anything here. ...
Threads Implementation
... • Thread creation is done through clone() system call. • clone() allows a child task to share the address space of the parent task (process). • This sharing of the address space allows the cloned child task to behave much like a separate thread. A. Frank - P. Weisberg ...
... • Thread creation is done through clone() system call. • clone() allows a child task to share the address space of the parent task (process). • This sharing of the address space allows the cloned child task to behave much like a separate thread. A. Frank - P. Weisberg ...
Threads
... Allows each thread to have its own copy of data Useful when you do not have control over the thread ...
... Allows each thread to have its own copy of data Useful when you do not have control over the thread ...
ch4
... Example -- summing the contents of an array of size N. On a single-core system, one thread would sum the elements 0 .. N-1. On a dual-core system, however, thread A, running on core 0, could sum the elements 0 .. N/2, while thread B, running on core 1, could sum the elements of N/2 .. N-1. The two t ...
... Example -- summing the contents of an array of size N. On a single-core system, one thread would sum the elements 0 .. N-1. On a dual-core system, however, thread A, running on core 0, could sum the elements 0 .. N/2, while thread B, running on core 1, could sum the elements of N/2 .. N-1. The two t ...
Linux+ Guide to Linux Certification Chapter Nine System Initialization
... unloading daemons using its configuration file /etc/inittab • Daemons are typically stored in the /etc/rc.d/init.d directory and loaded at system startup from entries in the /etc/rc.d/rc*.d directories ...
... unloading daemons using its configuration file /etc/inittab • Daemons are typically stored in the /etc/rc.d/init.d directory and loaded at system startup from entries in the /etc/rc.d/rc*.d directories ...
Why (and Why Not) to Use Fortran - Instead of C++, Matlab, Python
... From 1960s in statistics and engineering domains Usually interactive, but better ones are programmable ⇒ All are largely interpreted languages Will describe only Matlab, but comments are general Mathematica is for similar types of application Genstat, S--Plus, R are for statistical programming Most ...
... From 1960s in statistics and engineering domains Usually interactive, but better ones are programmable ⇒ All are largely interpreted languages Will describe only Matlab, but comments are general Mathematica is for similar types of application Genstat, S--Plus, R are for statistical programming Most ...
Introduction - Seneca - School of Information & Communications
... 1979 S/38 *PGM objects run on current iSeries) ...
... 1979 S/38 *PGM objects run on current iSeries) ...
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.