atomic rc

#! /Bin/sh# Start/stop/restart mysqld.## Copyright 2003 Patrick J. volkerding, Concord, CA# Copyright 2003 slackware Linux, inc., Concord, CA# Copyright 2008 Patrick J. volkerding, sebeka, Mn## This program comes with no warranty, to the extent permitted by law.# You may redistribute copies of this program under the terms of# GNU General Public License. # To start MySQL automatically at boot, be sure this script is executable:# Chmod 755/etc/rc. d/

Atomicreference Introduction and Functions List Atomicreference is a function of atomic manipulation of "objects". atomicreference Function List Creates a new atomicreference using the null initial value. atomicreference () //Creates a new atomicreference using the given initial value. atomicreference (V initialvalue) //If the current value = = expected value, set the value to the given update value atomically. Boolean compareandset (v expect

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Added support for the parallel task library (task parallel Library) in Silverlight 5 RC version. Task Parallel library is short for TPL, which means that one or more tasks run simultaneously, similar to thread or thread pool. In this example, we will compare the parallel job library and asynchronous data acquisition. For more information, see workshop/ First, create a Silverlight 5 project and add a new XML file helloworld. XML to its Web project. W

/* C ++ 11 atomic testing problem: if multiple atoms need to be operated, how to ensure parallel serialization */# include Mytimer. h file # Ifndef _ myglib_h __# DEFINE _ myglib_h __# include Compile: G ++-STD = C ++ 11 atomic_par.cpp Running result: Run a 2 Main threadResult: 10000000Duration: 25.7743 MsSingle threadDuration: 29.4485 MsMulti thread 2Result: 10000000Duration: 372.861 MsDelay for each thread: 160.656 ms, about 7.23319

$ LS-LD/etc/rc. dDrwxr-XR-x 10 Root 352 February 13 13:38/etc/rc. d/$ LS-LD/etc/init. dLrwxrwxrwx 1 Root 11 February 13 13:38/etc/init. d-> rc. d/init. d/ One is another soft link. Etc/rc. d/init. D contains some scripts for the INIT process (that is, process 1) to choose to run init according to the startup running le

1. Database Transaction ACID Properties4 Features of database transactions:Atomicity (Atomic): operations in a transaction either succeed or fail;Consistency (consistency): After a transactional operation, the state of the database and the business rules are consistent; For example, the total amount of the account is not changed after mutual transfer;Isolation (Isolation): multiple transactions, like serial execution, do not affect each other;Persiste

Linux has its own complete startup system, which captures the context of Linux Startup. the Linux Startup Process will no longer be mysterious. In this article, we assume that the init tree set in inittab is: /Etc/rc. d/rc0.d/Etc/rc. d/rc1.d/Etc/rc. d/rc2.d/Etc/rc. d/rc3.d/Etc/rc