synchronization

问题 Java provides a very convenient idiom for synchronizing critical portions of code: synchronized(someObject) { // do something really important all by myself with nobody bothering me } Or public synchronized void doSomething() { // ... } What is the go equivalent? (A quick search reveals: golang.org/pkg/sync/ - which seems (maybe I'm wrong) a bit too low level for general use.) (Example of why I care about this: I need to send a message to multiple listeners via channels. Channels provide a

问题 Java provides a very convenient idiom for synchronizing critical portions of code: synchronized(someObject) { // do something really important all by myself with nobody bothering me } Or public synchronized void doSomething() { // ... } What is the go equivalent? (A quick search reveals: golang.org/pkg/sync/ - which seems (maybe I'm wrong) a bit too low level for general use.) (Example of why I care about this: I need to send a message to multiple listeners via channels. Channels provide a

问题 This question already has an answer here : Vector vs Collections.synchronizedList(ArrayList) (1 answer) Closed 7 years ago . If multiple threads access vector, vector will ensure that only one thread can access the vector at the same time. SynchronizedList is same. So what's the difference? How to choose in some synchronous situation? 回答1: The main reason for this redundancy is backward compatibility with java code developed for old versions of Java. If I remember correctly before Java 1.2

问题 As the integers are produced the Consumer thread sums their value (1+2+3…+10=55) Producer thread generates integers from 1 to 10 The program is meant to produce an integer and consume it right away. But, the result generated at the program’s end rarely equals 55. This is because the threads don’t wait for each other to complete their tasks Need to add syncronization to the code so that the consumer thread adds a value to the total only after a producer thread has generated a new integer

问题 I have a TextBox that's bound to a property that gets modified at a very rapid rate in a background thread. Is data binding in WPF thread safe? Will the data in the property or the TextBox ever get out of sync? Is it necessary (or even possible) to use synchronization on a property that takes part in data binding? I understand that, if the class on which the property resides implements INotifyPropertyChanged, the binding framework automatically marshalls the UI update to the UI thread.

问题 I have a TextBox that's bound to a property that gets modified at a very rapid rate in a background thread. Is data binding in WPF thread safe? Will the data in the property or the TextBox ever get out of sync? Is it necessary (or even possible) to use synchronization on a property that takes part in data binding? I understand that, if the class on which the property resides implements INotifyPropertyChanged, the binding framework automatically marshalls the UI update to the UI thread.

问题 I'm doing some exercise about convolution over images (info here) using OpenCL. When I use images whose size is not a square (like r x c) CLK_LOCAL_MEM_FENCE makes the program stop with abort trap 6. What I do is essentially filing up the local memory with proper values, waiting for this process of filling the local memory to finish, using barrier( CLK_LOCAL_MEM_FENCE ) and then calculating the values. It seems like when I use images like those I've told you about barrier( CLK_LOCAL_MEM_FENCE

问题 I have this synchronized block in one of my classes, whose main responsibility is to capture metrics around service calls. All variables prefixed with _ are class variables and are primitive longs. I am looking to refactor this synchronized block so as to increase the throughput, but keeping the overall accuracy intact. I have a test setup which calls this method from Runnable threads using an executor service. I am doing a comparison on the metrics before and after refactoring. public

问题 I would want to sync up on-premises Oracle database with SQL Azure. Currently I have a DTS package setup for my on-premises applications (both Oracle and SQL Server being on-premise). If I move the SQL Server to Azure, how should this process be designed? 回答1: you have to options for moving to Azure: Move to Azure SQL Database Provision a SQL Server VM in Azure the latter will have the same feature set as your regular on-premise SQL Server. The former is not fully-feature equivalent to SQL

问题 I would want to sync up on-premises Oracle database with SQL Azure. Currently I have a DTS package setup for my on-premises applications (both Oracle and SQL Server being on-premise). If I move the SQL Server to Azure, how should this process be designed? 回答1: you have to options for moving to Azure: Move to Azure SQL Database Provision a SQL Server VM in Azure the latter will have the same feature set as your regular on-premise SQL Server. The former is not fully-feature equivalent to SQL