In simple words, we can say that a Thread is a unit of a process that is responsible for executing the application code. So, every program or application has some logic or code and to execute that logic or code, Thread comes into the picture. By default, every process has at least one thread which is responsible for executing the application code and that thread is called as Main Thread. So, every application by default is a single-threaded application.
Note: All the threading related classes in C belong to the System. Threading namespace. Let us see an example to understand Threading. This is a very simple program. But internally there is a thread that is going to execute this code and that thread is called Main Thread.
Now let us prove this. The Thread class contains one static property i. CurrentThread which is going to return the instance of the currently executing thread. If you go to the definition of Thread class then you will find the following signature. As you can see the CurrentThread static property return type is Thread i. Along the same line, there is a non-static property called Name using which we can set and get the Name of the currently executing thread.
Note: By default, the thread does not have any name. If you want then you can provide any name to the thread by using the Name property of the Thread class. So, modify the program as shown below. As you can see in order to run the application code one thread is created and i. So, this proves that, by default, every application is a single-threaded application. In a single thread application, all the logic or code present in the program will be executed by a single thread only i. You need some way of making PrintDetails use a unique filename, maybe include the thread id in the filename as well.
You haven't posted the code for the class so we can't give specific advice. You want two threads to write to the same file? Then you have to use locking. That is each thread tries to get exclusive access to a shared resource here a file by using an appropriate function which enters a wait state until the resource is free and then locked. Then the resource can be used and is unlocked when done.
A possible solution for you as far as I understand your code would be making the PrintDetails function thread safe. That is every critical section here: checking for file existance and creating it if necessary, and writing to the file must be guarded using locks optionally as ReaderWriter lock , monitors, or mutexes.
Posted Jun pm Jochen Arndt. In addition to Jochen's answer, you might be interested in ReaderWriterLockSlim which allows multiple threads to be in read mode, and allows one thread to be in write mode with exclusive ownership of the lock. Posted Jun am RickZeeland. Get rid of all your "stream writer" code and use. Posted Jun am Gerry Schmitz.
Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. Main Windows Service Coordinates threads and service settings stored in the database and polled every so often as defined in the settings, db info is hardcoded.
MySQL Database Connector Multiple components will need to access various parts of the database and I would like to send all db access through a single instance of this class running on its own thread. This will need to poll various tables in order to catch settings changes, historical data requests, and anything else that needs to be monitored.
When data is received, it should pass it both to the database component as well as to the analysis component. Analysis Takes the data and runs some analysis on it and produces statistics.
I don't know the hairy details about how this is implemented yet, my partner does that. In addition to the windows service, there will be a remote controller windows forms application that will connect to the database in order to control and configure it, as well as view data, request historical data, runs analyses on data, view reports, monitor status and activity, etc I am slightly stumped by this design and how these components are going to interact.
I am unsure about how method calls and data sharing work across threads. Are both functions accessing the database?
DavidHeffernan Actually, if it weren't a service, he wouldn't have a problem. It's a problem because he's trying to do all the work on the main thread of a service in the OnStart. If he were doing it in the main of a console application, he wouldn't need threads. Add a comment. Active Oldest Votes. You can use a task. That would be easier. If Function2 depends on Function1 , then you can do something like: Task. WriteEntry "Starting" ; I'm not sure if you want aTimer.
If Function1 and Function2 are independent, you can execute them simultaneously with: Task. Pete Pete 6, 4 4 gold badges 37 37 silver badges 68 68 bronze badges. Not necessarily, the docs of Parallel. Invoke say : No guarantees are made about the order in which the operations execute or whether they execute in parallel.
In Windows, clearly the environment of the poster it will generally execute concurrently, assuming CPU availability. And of course, it also assumes that there's enough work that one function won't complete before the other gets started.
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