atomic rc

Address: http://blog.csdn.net/zhandoushi1982/article/details/5767634 Related Web posts: Android STARTUP script init. RC ---- 000070 Init. RC descriptive file ---- androidsourcecode/system/CORE/init/readme.txt Use the startup script init. RC in Android to perform some simple initialization operations during system initialization. This script is directly installe

the line does not affect the other, and then increase the source is the same reasonand /ETC/ENV.D,/ETC/PROFILE.D,/ETC/UDEV.RULES.D and so on are the same truth.So, now it's time to answer your question. D is actually representing directory, the meaning of the directoryIn addition, for some commands there is a daemon meaning, such as ftpd,httpd. Now many programs add-D or--daemon parameters are also background execution optionsHttp://stackoverflow.com/questions/9587795/what-is-up-with-linux-and-

In this summary, we focus on the principle and design idea of atomic operation.Because of the locking mechanism in the next section, the concept of locking is introduced appropriately in this section.In the Java Concurrency in practice, this defines thread-safe: When multiple threads access a class, the behavior of the class is still correct , without regard to the scheduling and alternation of these threads in the runtime environment, and wi

: This article mainly introduces atomic operations in Nginx. For more information about PHP tutorials, see. Nginx provides its own atomic operations on a processor that does not support atomic operations. However, this atomic operation is simulated in C language: static ngx_inline ngx_atomic_uint_tngx_atomic_cmp_set(

This is a creation in Article, where the information may have evolved or changed. Http://www.baidu.com/link?url=qb02vICS8NhIztRZ1n7wWHiJ6bDGFeIKQQQfr0w0BShbImeG_EuBkDGEiGzYUF44vQUB6lk_ 6z11uvp4fcdtonzmlvy0lm6fy-t-yu6bdia posted 1 hours ago (2014-02-12 10:44) Read (7) | Comments (0) 0People to collect this article, Likes 0 Package Mainimport ("sync/atomic" "unsafe") type a struct {x unsafe. Pointery Uint64}func Main () {p: = new (a)

Huawei launched the World's smallest operating-level Router Atom Router at the Mobile World Congress 2014 today ). This atomic router can be deployed on any node or device on the current network, and can be visualized and managed without modifying the current network, provides high-precision Performance Detection for each user and business in real time, helping traditional networks increase network value. This major breakthrough focusing on customer n

modify the status of any program. This is why constant and atomic data are recommended at the same time. Break down your object into a natural single entity structure. An address is a simple task. It consists of multiple related fields. Changing one of the fields may mean modifying other fields. A customer type is not an atomic type. A customer type may contain many small information blocks: addresses, nam

Nonatomic: Non-atomic access, no lock when assigning values to attributes, multi-thread concurrent access will improve performance. If this attribute is not added, both access methods are atomic transaction access by default. (Atomic is a thread protection technology used by objc. Basically, it is used to prevent reading by another thread when the write is not co

Done twiceCodeBoth Java and. Net were reviewed for about three hours. The biggest achievement is to separate the scheduling method from the atomic operation method. The scheduling method is generally a method that calls other methods to implement a function based on different situations. The scheduling method reflects the process. The atomic operation method is generally a method with a single func

This is part of the interlocked API introduced by Microsoft, but the atomic operation problem is mentioned in it. Although it should be only for Microsoft operating systems, I think all operating systems should be consistent. For a numeric operation that has the same or lower CPU bits and is aligned with bytes, the value assignment must be completed. After the assignment, the value must be assigned, after the value is obtained, it must be a value assi

1. Introduction Atom is intended to be "the smallest particle that cannot be further divided", and atomic operation is "one or more operations that cannot be interrupted ". It is a little complicated to implement atomic operations on a multi-processor. In this article, let's talk about how the Intel processor and Java implement atomic operations.2. Definition of

variable simultaneously using CAS, only one of the threads can update the value of the variable, and the other threads will fail. * However, the failed thread is not suspended, but is told to fail in this competition and can try again. * Because a thread does not block when it competes with CAS, it can decide whether to retry, or perform some recovery operations, or not take any action. */ Public classSimulatedcas {Private intvalue; Public synchronized intget () {returnvalue; } Public

Ext.: http://www.blogjava.net/xylz/archive/2010/07/01/324988.htmlStart with a relatively simple atomic (Java.util.concurrent is a queue-based contract and the queue, in many cases, uses the atomic operation, so begin here first). In many cases we just need a simple, efficient, thread-safe increment-decrement scheme. Note that there are three conditions: simple, which means that it is easier for programmers

Atomic: Atomic operation, providing operation protection in multi-threaded environment;Nonatomic: Non-atomic operation, does not provide protection, in the multi-threaded environment may occur unknown error;Retain: Hold reference, that is, the reference count value of the object count + = 1, the resulting object and the incoming object point to the same memory sp

Tags: coreos atomic docker OS From https://major.io/2014/05/13/coreos-vs-project-atomic-a-review /.[Deployment]Coreos:Deploy the service using a cloud image or PXE. You can use cloud-config for configuration on the cloud.The key-value system etcd is provided, providing capabilities similar to zookeeper. It can also be used to place node information.It provides fleet for docker container lifecycle management

SynchronizedIn the case of the resource competition is not very intense, occasionally there will be synchronization situations, synchronized is very appropriate. The reason is that the compiler usually optimizes synchronize as much as possible, and is also very readable, understandable by programmers who don't use more than 5 threads.Reentrantlock:Reentrantlock provides a variety of synchronization, such as time-limited synchronization, can be interrupt synchronization (synchronized synchronizat

JAVA concurrent API source code parsing: Atomic class, api source code The JAVA. util. concurrent. atomic package of java APIs provides a series of classes that do not need to be synchronized when the concurrency is based on the basic type packaging class (implemented using hardware-related commands ). First, let's look at an example of AutomicInteger: public class AtomicInteger extends Number implements ja