Life

Is WaitForSingleObject blocking?

Is WaitForSingleObject blocking?

Yes — the thread is blocked until whatever it’s waiting on becomes signaled.

How to Set thread priority?

The setPriority() method of thread class is used to change the thread’s priority. Every thread has a priority which is represented by the integer number between 1 to 10. Thread class provides 3 constant properties: public static int MIN_PRIORITY: It is the maximum priority of a thread.

How to Set priority for thread in c?

However, you can create your own attribute and set its properties, including driving up the priority with something like: #include h> #include . h> int rc; pthread_attr_t attr; struct sched_param param; rc = pthread_attr_init (&attr); rc = pthread_attr_getschedparam (&attr, &param); (param.

What does the CreateThread do?

The CreateThread function creates a new thread for a process. The creating thread must specify the starting address of the code that the new thread is to execute.

What is the use of WaitForSingleObject?

The WaitForSingleObject function checks the current state of the specified object. If the object’s state is nonsignaled, the calling thread enters the wait state until the object is signaled or the time-out interval elapses. The function modifies the state of some types of synchronization objects.

What is duplicate handle?

The duplicate handle refers to the same object as the original handle. Therefore, any changes to the object are reflected through both handles. For example, if you duplicate a file handle, the current file position is always the same for both handles.

What is the default priority of a thread?

5
Default priority of a thread is 5 (NORM_PRIORITY). The value of MIN_PRIORITY is 1 and the value of MAX_PRIORITY is 10.

What decides thread priority?

Explanation: Thread scheduler decides the priority of the thread execution.

What is normal thread priority?

Default priority of a thread is 5 (NORM_PRIORITY). The value of MIN_PRIORITY is 1 and the value of MAX_PRIORITY is 10.

What is the average thread priority?

Threading namespace is responsible for specifying the scheduling priority of a Thread and the priorities are: Highest: The value of this priority is 4. AboveNormal: The value of this priority is 3. Normal: The value of this priority is 2.

Is HP UX a thread library?

HP-UX operating systems provide a POSIX thread library and a DCE thread library.

What does mean if the fifth parameter in the CreateThread function is set to zero?

If this parameter is zero, the new thread uses the default size for the executable.

How do you use waitforsingleobject?

WaitForSingleObject function. Waits until the specified object is in the signaled state or the time-out interval elapses. To enter an alertable wait state, use the WaitForSingleObjectEx function. To wait for multiple objects, use WaitForMultipleObjects.

How to check if the threads are set to the correct priority?

So could you please try to check the threads via Process Explorer tool, check if they were set to the correct priority. As we know, the thread is controlled by system thread dispatcher. System can assign more time slices to one higer priority than the lower one. But if the thread is not ready to run, system will not assign the time slice.

Why is waitforsingleobject so dangerous?

Except that WaitForSingleObject and its big brother WaitForMultipleObjects are dangerous. The basic problem is that these calls can cause deadlocks, if you ever call them from a thread that has its own message loop and windows.

What is the wait state of a synchronous object?

If the object’s state is nonsignaled, the calling thread enters the wait state until the object is signaled or the time-out interval elapses. The function modifies the state of some types of synchronization objects. Modification occurs only for the object whose signaled state caused the function to return.