// WithProcessClosing returns a context.Context derived from ctx that
// is cancelled as p is Closing (after: <-p.Closing()). It is simply:
//
// func WithProcessClosing(ctx context.Context, p goprocess.Process) context.Context {
// ctx, cancel := context.WithCancel(ctx)
// go func() {
// <-p.Closing()
// cancel()
// }()
// return ctx
// }
//
func WithProcessClosing(ctx context.Context, p goprocess.Process) context.Context {
ctx, cancel := context.WithCancel(ctx)
go func() {
<-p.Closing()
cancel()
}()
return ctx
}
// CloseAfterContext schedules the process to close after the given
// context is done. It is the equivalent of:
//
// func CloseAfterContext(p goprocess.Process, ctx context.Context) {
// go func() {
// <-ctx.Done()
// p.Close()
// }()
// }
//
func CloseAfterContext(p goprocess.Process, ctx context.Context) {
if p == nil {
panic("nil Process")
}
if ctx == nil {
panic("nil Context")
}
// context.Background(). if ctx.Done() is nil, it will never be done.
// we check for this to avoid wasting a goroutine forever.
if ctx.Done() == nil {
return
}
go func() {
<-ctx.Done()
p.Close()
}()
}
// WaitForContext makes p WaitFor ctx. When Closing, p waits for
// ctx.Done(), before being Closed(). It is simply:
//
// p.WaitFor(goprocess.WithContext(ctx))
//
func WaitForContext(ctx context.Context, p goprocess.Process) {
p.WaitFor(WithContext(ctx))
}