mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
36 lines
1.0 KiB
V
36 lines
1.0 KiB
V
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
|
|
// Use of this source code is governed by an MIT license
|
|
// that can be found in the LICENSE file.
|
|
module sync
|
|
|
|
// We cannot simply use Mutex.lock() in the waitgroup.wait() method
|
|
// as it will not block since it's used in the same thread.
|
|
// docs:
|
|
// Any thread with a handle to a mutex object can use one of the
|
|
// wait functions to request ownership of the mutex object.
|
|
// If the mutex object is owned by another thread, the wait
|
|
// function blocks the requesting thread until the owning thread
|
|
// releases the mutex object using the ReleaseMutex function.
|
|
// Source:
|
|
// https://docs.microsoft.com/en-us/windows/win32/sync/mutex-objects
|
|
|
|
[ref_only]
|
|
struct Waiter{
|
|
mut:
|
|
event MHANDLE
|
|
}
|
|
|
|
pub fn (mut w Waiter) wait() {
|
|
C.WaitForSingleObject(w.event, C.INFINITE) // infinite wait
|
|
}
|
|
|
|
pub fn (mut w Waiter) stop() {
|
|
C.SetEvent(w.event)
|
|
}
|
|
pub fn new_waiter() &Waiter {
|
|
unsafe {
|
|
sm := &Waiter{event: MHANDLE(C.CreateEvent(0, false, true, 0))}
|
|
return sm
|
|
}
|
|
}
|