In my day to day tasks, synchronization primitives are used quite often. ObjC
had the @synchronized attribute for methods. I didn’t find anything about this
in swift evolution, so I thought i bring it up here. I think it would quite
easily be possible to introduce a synchronized qualifier for struct/class
objects that automatically synthesize a semaphore variable on the object and
use it to lock said method. Here is an example of how that would work
Without the synchronized attribute (code written in mail, not compiled):
class Obj {
private let sema = DispatchSemaphore(value: 1)
func synchronizedMethod() {
sema.wait()
defer {
sema.signal()
}
// do something...
}
}
With synchronized attribute (the semaphore/wait/deferred-signal is synthesized
by Swift automatically)
class Obj {
synchronized func method() {
// semaphore is synthesized automatically, do something…
}
}
Cheers,
Erik
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