OpenBSD can makeProcessSource after all.

Unwind some conditionals hiding makeProcessSource and associated
DispatchSourceProcess.

We can probably makeFileSystemObjectSource too, but presumably since
pid_t on OpenBSD is Int32, there is a protocol conflict with
DispatchSourceProcess and DispatchSourceFileSystemObject. For now, just
reveal DispatchSourceProcess.

Author: 3405691582

src/swift/Source.swift

@@ -116,24 +116,27 @@ extension DispatchSource {
 	}
 #endif
 
-#if !os(Linux) && !os(Android) && !os(Windows) && !os(OpenBSD)
+#if !os(Linux) && !os(Android) && !os(Windows)
 	public struct ProcessEvent : OptionSet, RawRepresentable {
 		public let rawValue: UInt
 		public init(rawValue: UInt) { self.rawValue = rawValue }
 
 		public static let exit = ProcessEvent(rawValue: 0x80000000)
 		public static let fork = ProcessEvent(rawValue: 0x40000000)
 		public static let exec = ProcessEvent(rawValue: 0x20000000)
-#if os(FreeBSD)
-		public static let track = ProcessEvent(rawValue: 0x00000001)
-#else
+
+#if canImport(Darwin)
 		public static let signal = ProcessEvent(rawValue: 0x08000000)
 #endif
+#if os(FreeBSD) || os(OpenBSD)
+		public static let track = ProcessEvent(rawValue: 0x00000001)
+#endif
 
-#if os(FreeBSD)
-		public static let all: ProcessEvent = [.exit, .fork, .exec, .track]
-#else
+#if canImport(Darwin)
 		public static let all: ProcessEvent = [.exit, .fork, .exec, .signal]
+#endif
+#if os(FreeBSD) || os(OpenBSD)
+		public static let all: ProcessEvent = [.exit, .fork, .exec, .track]
 #endif
 	}
 #endif
@@ -183,7 +186,7 @@ extension DispatchSource {
 	}
 #endif
 
-#if !os(Linux) && !os(Android) && !os(Windows) && !os(OpenBSD)
+#if !os(Linux) && !os(Android) && !os(Windows)
 	public class func makeProcessSource(identifier: pid_t, eventMask: ProcessEvent, queue: DispatchQueue? = nil) -> DispatchSourceProcess {
 		let source = dispatch_source_create(_swift_dispatch_source_type_PROC(), UInt(identifier), eventMask.rawValue, queue?.__wrapped)
 		return DispatchSource(source: source) as DispatchSourceProcess
@@ -299,7 +302,7 @@ extension DispatchSourceMemoryPressure {
 }
 #endif
 
-#if !os(Linux) && !os(Android) && !os(Windows) && !os(OpenBSD)
+#if !os(Linux) && !os(Android) && !os(Windows)
 extension DispatchSourceProcess {
 	public var handle: pid_t {
 		return pid_t(CDispatch.dispatch_source_get_handle((self as! DispatchSource).__wrapped))

src/swift/Wrapper.swift

@@ -182,7 +182,7 @@ extension DispatchSource : DispatchSourceMachSend,
 }
 #endif
 
-#if !os(Linux) && !os(Android) && !os(Windows) && !os(OpenBSD)
+#if !os(Linux) && !os(Android) && !os(Windows)
 extension DispatchSource : DispatchSourceProcess {
 }
 #endif
@@ -277,7 +277,7 @@ public protocol DispatchSourceMemoryPressure : DispatchSourceProtocol {
 }
 #endif
 
-#if !os(Linux) && !os(Android) && !os(Windows) && !os(OpenBSD)
+#if !os(Linux) && !os(Android) && !os(Windows)
 public protocol DispatchSourceProcess : DispatchSourceProtocol {
 	var handle: pid_t { get }
 

src/swift/shims/DispatchOverlayShims.h

@@ -88,7 +88,7 @@ SWIFT_DISPATCH_SOURCE_TYPE(PROC)
 SWIFT_DISPATCH_SOURCE_TYPE(VNODE)
 #endif
 
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__OpenBSD__)
 SWIFT_DISPATCH_SOURCE_TYPE(PROC)
 SWIFT_DISPATCH_SOURCE_TYPE(VNODE)
 #endif