atomic rc

This blog will conduct a real machine test on the following four situations: ● Int cant in the class ● Volatile variable int CNT in the class ● Nonatomic attribute int CNT in the class ● Class atomic attribute int CNT For more information about volatile keywords, see volatile keywords in C. Volatile tells the compiler that the memory value is forcibly used each time the variable I is calculated, rather than the value in the register.

A 32-bit IA-32 processor supports locking atomic operations on locations in system memory. These operations are generally used for shared data structures (such as semaphores, segment descriptors, system segments, and page tables ). For these shared data structures, there may be two or more processors trying to modify their same domain at the same time (Translator's note: it is equivalent to a data member of the struct variable in C) or sign. The proce

Http://hi.baidu.com/yicun05/blog/item/ce8cf118cec87172dbb4bdd3.html 1: What is an atomic operation? The minimum unit of thread execution, which cannot be interrupted. 2: What is volatile? A common variable is cached in both the primary memory and the temporary memory of the current thread.Unified and need to be synchronized. If the synchronization is not completed, if other threads read the value from the primary memory, the synchronization exception

This package provides a set of atomic variable classes. The basic feature is that in a multithreaded environment, when there are multiple threads executing the methods contained by instances of these classes at the same time, there is exclusivity, that is, when a thread enters the method and executes the instruction, it is not interrupted by another thread, and the other thread is like a spin lock until the method executes. It is only a logical unders

In order to achieve thread safety, we are in front of the lock to ensure the atomic nature, then there is no lock can be implemented thread safety. It starts with the optimistic lock and the pessimistic lock.1. Pessimistic lock. The so-called pessimistic lock, is the access to resources, by default is that there will be resource preemption, so each time to lock, only one thread to execute. Optimistic lock. Another kind of lock policy, the default reso

Sysv-rc-conf sets sudoapt-getinstallsysv-rc-confsysv-rc-conf to be automatically started when ubuntu is started. it is a powerful service management program, the comments from the masses are that sysv-rc-conf is better than chkconfig. Run: # sudosysv-rc-conf can also be dire

1 SetNOCP2 SetNu3 Setru4 SetNoet5 Setbs=26 Setts=87 Setss=88 Setsw=89 SetAITen SetCin One SetMouse =a A - SetMp=g++\%\-o\%ANSI - the syn on -Colodefault - -Let CC = the +Let g:qf=0 -Let g:hls=0 +Inoremap A atfunc!Q () - ifG:QF -Let g:qf=0 - Cclose - Else -Let g:qf=1 in Copen - End to Endfunc + -func!H () the ifG:hls *Let g:hls=0 $ SetNohlsPanax Notoginseng Else -Let g:hls=1 the SetHLS + End A Endfunc the +Map GT -Map GT $Map $Map -Map Setts=4ss=4sw=4 -Map

Label:P6spy 3.0.0-rc-1 Released, P6spy is an open-source framework that can be used to intercept and modify data manipulation statements in an application (introductory basic tutorial qkxue.net). By p6spy we can intercept SQL statements, which is equivalent to a logger for SQL statements, so that we can use it for related analysis, such as performance analysis (mobile app development ty300.com).This version is just a minor release, with little improve

Label:Environment confessed: Linux 6.3Oracle Rac 11.2.0.4[[email protected] grid]#/u01/app/11.2.0/grid/root.shperforming root user operation for Oracle 11gThe following environment variables is set as:oracle_owner= grid oracle_home=/u01/app/11.2.0/gridEnter the full pathname of the local bin directory: [/usr/local/bin]: Copying dbhome to/usr/local/bin ... Copying oraenv To/usr/local/bin ... Copying coraenv To/usr/local/bin ...Creating/etc/oratab file ... Entries'll be added to The/etc/oratab fil

[Reprint] C # Use Interlocked for atomic operations, Source article: Wang Xu blog» C # Use Interlocked for atomic operations What is an atomic operation? Atom is intended to be "the smallest particle that cannot be further divided", while atomic operation is "one or a series of operations that cannot be interrupted ".

2iSome years ago I started work on my first CUDA implementation of the Multiparticle collision Dynamics (MPC) algorithm, a Particle-in-cell code used to simulate hydrodynamic interactions between solvents and solutes. As part of the This algorithm, a number of particle parameters is summed to calculate certain cell parameters. This is in the days of the Tesla GPU architecture (such as GT200 GPUs, Compute Capability 1.x), which had poor atomic ope Rati