search

timotheecour / Nim

Nim is a compiled, garbage-collected systems programming language with a design that focuses on efficiency, expressiveness, and elegance (in that order of priority).
http://nim-lang.org/
Other
2 stars 0 forks source link

add yieldThread #704

Open ringabout opened 3 years ago

ringabout commented 3 years ago

Ref https://chromium.googlesource.com/chromium/src/third_party/WebKit/Source/wtf/+/823d62cdecdbd5f161634177e130e5ac01eb7b48/SpinLock.cpp

Since we already have yieldProcessor in the system module, we also need yieldThread.

On unix it is sched_yield, on windows it is SwitchToThread.

though we still need to consider the differences on different platforms.

On windows

The yield of execution is in effect for up to one thread-scheduling time slice on the processor of the calling thread. The operating system will not switch execution to another processor, even if that processor is idle or is running a thread of lower priority.

While on unix they can switch to different processors.

see also https://www.generacodice.com/en/articolo/85065/SwitchToThread/Thread.Yield-vs.-Thread.Sleep(0)-vs.-Thead.Sleep(1)