Skip to content

Adding when for blocking on 2 and 3 promises #12

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
russellbstephens wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Adding when for blocking on 2 and 3 promises #12

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
48 changes: 48 additions & 0 deletions Promises/Promise.swift
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -343,6 +343,54 @@ public func when<V>(promises: Promise<V>...) -> Promise<[V]> {
return when(promises)
}

public func when<T, U>(t: Promise<T>, _ u: Promise<U>) -> Promise<(T, U)> {
var tValue: T?
var uValue: U?

return promise { resolve, reject in
var counter: Int32 = 2
t.error(reject).then {
tValue = $0
if 0 == OSAtomicDecrement32(&counter) {
resolve((tValue!, uValue!))
}
}
u.error(reject).then {
uValue = $0
if 0 == OSAtomicDecrement32(&counter) {
resolve((tValue!, uValue!))
}
}
}
}

public func when<T, U, V>(t: Promise<T>, _ u: Promise<U>, _ v: Promise<V>) -> Promise<(T, U, V)> {
var tValue: T?
var uValue: U?
var vValue: V?
let promiseCount: Int32 = 3
return promise { resolve, reject in
var counter: Int32 = promiseCount
t.error(reject).then {
tValue = $0
if 0 == OSAtomicDecrement32(&counter) {
resolve((tValue!, uValue!, vValue!))
}
}
u.error(reject).then {
uValue = $0
if 0 == OSAtomicDecrement32(&counter) {
resolve((tValue!, uValue!, vValue!))
}
}
v.error(reject).then {
vValue = $0
if 0 == OSAtomicDecrement32(&counter) {
resolve((tValue!, uValue!, vValue!))
}
}
}
}

public func first<V>(promises: [Promise<V>]) -> Promise<V> {
let p = Promise<V>(Queue().suspend())
Expand Down