synchronization

One can use a CRITICAL_SECTION variable to get mutual exclusion. My question is: does CRITICAL_SECTION support copying? If I pass one by value to another thread, can I know for sure that mutual exclusion will work? I wouldn't be surprised if the answer is "you cannot do that", but it'd be nice to have some sort of official confirmation. I wasn't able to find a statement either way in the documentation. No. A CRITICAL_SECTION cannot be copied. MSDN states this explicitly : A critical section object cannot be moved or copied. A quick search through the headers reveals that the structure is

Here is a piece of text I found at this link. "Avoid lock on static methods The worst solution is to put the "synchronized" keywords on the static methods, which means it will lock on all instances of this class." Why would synchronizing a static method lock all instances of the class? Shouldn't it just lock the Class? Here's my test code that shows that you're right and the article is a bit over-cautious: class Y { static synchronized void staticSleep() { System.out.println("Start static sleep"); try { Thread.sleep(2000); } catch (InterruptedException e) { } System.out.println("End static

I need to synchronize data between two databases. The primary database is a SQL server database where all insert, update and delete operations take place. The other database is a MySQL database that reflects the state of primary database at the time of synchronization. Note that Real-time synchronization is not important, the synchronization will done randomly depending on operator and network availability. My questions: What are the possible ways to determine that the two databases are already in sync and synchronization is NOT required What are the possible ways to push data from SQL to

I am trying to create a Google Apps Script that keeps a Google Calendar and a "master spreadsheet" on Drive synchronized -- is this possible? I found these two posts: http://blog.ouseful.info/2010/03/04/maintaining-google-calendars-from-a-google-spreadsheet/ http://blog.ouseful.info/2010/03/05/grabbing-google-calendar-event-details-into-a-spreadsheet/ I'm quite sure this could be done using a lot of if statements and logic, but maybe there's a simpler way? I ended up just providing the following simple script. All that was really necessary was adding events based on two columns, and this would

I have multiple applications running in one virtual machine. I have multiple virtual machines running on one server. And I have multiple servers. They all share a file using a shared folder on linux. The file is read and written by all applications. During the write process no application is allowed to read this file. The same for writing: If an application is reading the file no application is allowed to write it. How do I manage to synchronize the applications so they will wait for the write process to finish before they read, and vice versa? (the applications inside a vm have to be

What's the difference between InterlockedCompareExchangeRelease() and InterlockedCompareExchangeAcquire() ? When I try to learn the synchronization functions with WIN32 API, I find there are two functions named differently but seems to do the same thing: LONG __cdecl InterlockedCompareExchangeRelease( __inout LONG volatile *Destination, __in LONG Exchange, __in LONG Comparand ); and LONG __cdecl InterlockedCompareExchangeAcquire( __inout LONG volatile *Destination, __in LONG Exchange, __in LONG Comparand ); I check the MSDN, it says those functions are: Performs an atomic compare-and-exchange