Search results
Results from the WOW.Com Content Network
On Windows, the Sleep() function takes a single parameter of the number of milliseconds to sleep. The Sleep() function is included in kernel32.dll. [1]The Sleep() function has a resolution no higher than the current timer resolution, typically 16ms but at minimum 1ms, adjustable via the timeBeginPeriod() family of "media timer" APIs.
Busy-waiting itself can be made much less wasteful by using a delay function (e.g., sleep()) found in most operating systems. This puts a thread to sleep for a specified time, during which the thread will waste no CPU time. If the loop is checking something simple then it will spend most of its time asleep and will waste very little CPU time.
Instead, it will begin the download process using a non-blocking mechanism (such as a background thread), and immediately return an unresolved, unrejected Task<byte[]> to this function. With the await keyword attached to the Task , this function will immediately proceed to return a Task<int> to its caller, who may then continue on with other ...
} // Thread sleep method: // On current CPU core, a synchronous context switch to another thread without putting // the current thread on the ready queue. // Must be holding "threadingSystemBusy" and disabled interrupts so that this method // doesn't get interrupted by the thread-switching timer which would call contextSwitchISR().
The result is an indefinite postponement until the thread holding the lock can finish and release it. This is especially true on a single-processor system, where each waiting thread of the same priority is likely to waste its quantum (allocated time where a thread can run) spinning until the thread that holds the lock is finally finished.
In this program, the thread barrier is defined as a struct, struct _thread_barrier, which include: total_thread: Total threads in the process; thread_barrier_number: Total number of threads expected to enter the thread barrier so that it can be lifted; lock: A POSIX thread mutex lock
A sample thread pool (green boxes) with waiting tasks (blue) and completed tasks (yellow) In computer programming, a thread pool is a software design pattern for achieving concurrency of execution in a computer program.
In the C++ programming language, the C++ Standard Library is a collection of classes and functions, which are written in the core language and part of the C++ ISO Standard itself. [ 1 ] Overview