oracle dispatch

What is a dispatch function: Dispatch functions are an important concept in WIndows drivers. The main function of the driver is to handle I/O requests, where most of the I/O requests are handled in the dispatch function. In other words, the dispatch function is used to process the I/O request submitted by the driver.So

As a workshop manager, do you have trouble with these problems every day: The data of the workshop production dispatch is not complete, and go back and forth to statistics, records, meetings, mental sickness? Dispatch task can not release, each link is not finished, every day worried? Dispatch workers slow progress, issued by the production task, like a sink, pro

iOS three multithreading technology 1.NSThread each Nsthread object corresponds to one thread, the magnitude is lighter (real multi-threaded) 2. The following two points are Apple's "concurrency" technology specifically developed to allow programmers to stop worrying about thread-specific usage issues ønsoperation/ Nsoperationqueue Object-oriented threading technology Øgcd--grand Central Dispatch (distributed) is a C-based framework that can take full

We can almost dispatch the queue to complete all the tasks that are done with threads. Scheduling queues are simpler, easier to use, and more efficient than thread code.The following is a summary of the scheduling queue, how to use the scheduling queue in the application to perform tasks.1. About scheduling queuesAll dispatch queues are FIFO queues, so the order in which the tasks in the queue starts is the

Reprinted from: Http://blog.sina.com.cn/s/blog_6dce99b10101atsu.html, respecting the original!a detailed description of the concurrency of iOS development applications dispatch queues is the content of this article, we can almost dispatch the queue to complete all the tasks with the thread . Scheduling queues are simpler, easier to use, and more efficient than thread code. The following is a summary of the

What is dispatch sources? In short, dispatch source is an object that monitors certain types of events. When these events occur, it automatically puts a block into the execution routine of a dispatch queue. It seems a bit ambiguous. What types of events are discussed? The following are events supported by GCD 10.6.0: Mach port send right state chang

Tags: style blog color Io OS AR for file Dispatch group is a feature of GCD. It can group tasks. The caller can wait for the execution of this group of tasks to complete, or continue to execute after the callback function is provided. When this group of tasks is completed, the caller will be notified. This function has multiple purposes. The most important and important usage is to merge multiple tasks to be executed concurrently into one group, there

Dispatch function is an important concept in the Windows Driver. The main function of the driver is to process I/O requests.It is handled in dispatch letters. All the I/O requests to the driver in user mode are converted from the operating system to an IRP data structure."Dispatch" to different dispatch letters. IRP an

[52 Effective ways to write high-quality iOS code] (10) Grand Central Dispatch (GCD)Reference book: "Effective Objective-c 2.0", "English" Matt GallowaySneak Peek41. Multi-use dispatch queue, less use of synchronous lock42. Multi-use GCD, less use Performselector series method43. Mastering the time of GCD and Operation queue44. Perform tasks based on system resource status through the

GCD is a pure C language, but it is also soluble in object-oriented thinking, based on block. 1, GCD Advantages: Ease of use: GCD is easier to use than thread, and the block-based feature makes it extremely simple to pass the context between different code scopes. Efficiency: GCD is more practical and fast in many places than it is dedicated to creating threads that consume resources. Performance: GCD automatically increases and decreases the number of threads based on system lo

Introduction:The full name of GCD is the Grand Central Dispatch, an API that Apple has published in iOS4.0 to handle concurrency. Its purpose is to improve the processor's multi-core computing capabilities.GCD is a bit like nsoperationqueue, which allows programs to split a task into multiple single tasks and commit to a work queue to execute concurrently or serially, but GCD is more efficient than nsopertionqueue.How the GCD works:GCD works by allowi

Dispatch QueuesDispatch queues is a c-based mechanism for executing custom tasks. A dispatch queue executes tasks either serially or concurrently but always in a first-in, first-out order. (In other words, a dispatch queue always dequeues and starts tasks in the same order in which they were added to the queue .) A serial dis