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What exactly are “spin-locks”?
...ly a "disable interrupts" or "raise IRQL" which prevents thread scheduling completely.
Spinlocks ultimately allow kernels to avoid "Big Kernel Lock"s (a lock acquired when core enters kernel and released at the exit) and have granular locking over kernel primitives, causing better multi-processing o...
How to use enums in C++
... is invalid. (Which is sad). This is because C++ is (somewhat) backwards compatable with C, and C had no namespaces, so enumerations had to be in the global namespace. So the syntax is simply:
enum Days {Saturday, Sunday, Tuesday, Wednesday, Thursday, Friday};
Days day = Saturday;
if (day == Sat...
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
...just installed MySQL for the first time and then tried to access via MySQL command line client. That sounds like first time access to me.
– Mike Brant
Dec 13 '14 at 13:17
18
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Is there a Max function in SQL Server that takes two values like Math.Max in .NET?
...omas Obligatory meme image (no offence intended to you in any way!) flickr.com/photos/16201371@N00/2375571206
– xan
Dec 19 '11 at 15:58
...
Thread vs ThreadPool
...t.
If your workload consistently has large numbers of thread pool requests coming in, then the thread pool will tune itself to your workload by creating more threads in the pool by the above process so that there are a larger number of thread available to process requests
check Here for more in dept...
Find and restore a deleted file in a Git repository
Say I'm in a Git repository. I delete a file and commit that change. I continue working and make some more commits. Then, I find I need to restore that file.
...
Visual Studio : short cut Key : Duplicate Line
Is there a shortcut for Duplicate Line command in Visual Studio 2008?
30 Answers
3...
Can't create handler inside thread that has not called Looper.prepare()
...rom within the main thread. You could use a handler, for example.
Look up Communicating with the UI Thread in the documentation. In a nutshell:
// Set this up in the UI thread.
mHandler = new Handler(Looper.getMainLooper()) {
@Override
public void handleMessage(Message message) {
...
How do I check for null values in JavaScript?
...NaN
Please note that if you are specifically checking for numbers it is a common mistake to miss 0 with this method, and num !== 0 is preferred (or num !== -1 or ~num (hacky code that also checks against -1)) for functions that return -1, e.g. indexOf)
...
Intellij IDEA Java classes not auto compiling on save
...we can build automatically the edited sources if we are using the external compiler option. The only thing needed is to check the option "Build project automatically", located under "Compiler" settings:
Also, if you would like to hot deploy, while the application is running or if you are using sp...