Merge pull request swiftlang#481 from compnerd/handle-extensions

swift: add a set of Windows extensions

Author: ktopley-apple

src/swift/IO.swift

@@ -11,6 +11,9 @@
 //===----------------------------------------------------------------------===//
 
 import CDispatch
+#if os(Windows)
+import WinSDK
+#endif
 
 extension DispatchIO {
 
@@ -34,12 +37,28 @@ extension DispatchIO {
 public static let strictInterval = IntervalFlags(rawValue: 1)
 }
 
+#if os(Windows)
+public class func read(fromHandle: HANDLE, maxLength: Int, runningHandlerOn queue: DispatchQueue, handler: @escaping (_ data: DispatchData, _ error: Int32) -> Void) {
+dispatch_read(dispatch_fd_t(bitPattern: fromHandle), maxLength, queue.__wrapped) { (data: dispatch_data_t, error: Int32) in
+handler(DispatchData(borrowedData: data), error)
+}
+}
+#endif
+
 public class func read(fromFileDescriptor: Int32, maxLength: Int, runningHandlerOn queue: DispatchQueue, handler: @escaping (_ data: DispatchData, _ error: Int32) -> Void) {
 dispatch_read(dispatch_fd_t(fromFileDescriptor), maxLength, queue.__wrapped) { (data: dispatch_data_t, error: Int32) in
 handler(DispatchData(borrowedData: data), error)
 }
 }
 
+#if os(Windows)
+public class func write(toHandle: HANDLE, data: DispatchData, runningHandlerOn queue: DispatchQueue, handler: @escaping(_ data: DispatchData??, _ error: Int32) -> Void) {
+dispatch_write(dispatch_fd_t(bitPattern: toHandle), data.__wrapped.__wrapped, queue.__wrapped) { (data: dispatch_data_t?, error: Int32) in
+handler(data.map { DispatchData(borrowedData: $0) }, error)
+}
+}
+#endif
+
 public class func write(toFileDescriptor: Int32, data: DispatchData, runningHandlerOn queue: DispatchQueue, handler: @escaping (_ data: DispatchData?, _ error: Int32) -> Void) {
 dispatch_write(dispatch_fd_t(toFileDescriptor), data.__wrapped.__wrapped, queue.__wrapped) { (data: dispatch_data_t?, error: Int32) in
 handler(data.map { DispatchData(borrowedData: $0) }, error)

src/swift/Source.swift

@@ -181,6 +181,13 @@ extension DispatchSource {
 }
 #endif
 
+#if os(Windows)
+public class func makeReadSource(handle: HANDLE, queue: DispatchQueue? = nil) -> DispatchSourceRead {
+let source = dispatch_source_create(_swift_dispatch_source_type_READ(), UInt(bitPattern: handle), 0, queue?.__wrapped)
+return DispatchSource(source: source) as DispatchSourceRead
+}
+#endif
+
 public class func makeReadSource(fileDescriptor: Int32, queue: DispatchQueue? = nil) -> DispatchSourceRead {
 #if os(Windows)
 let handle: UInt = UInt(_get_osfhandle(fileDescriptor))
@@ -224,6 +231,13 @@ extension DispatchSource {
 }
 #endif
 
+#if os(Windows)
+public class func makeWriteSource(handle: HANDLE, queue: DispatchQueue? = nil) -> DispatchSourceWrite {
+let source = dispatch_source_create(_swift_dispatch_source_type_WRITE(), UInt(bitPattern: handle), 0, queue?.__wrapped)
+return DispatchSource(source: source) as DispatchSourceWrite
+}
+#endif
+
 public class func makeWriteSource(fileDescriptor: Int32, queue: DispatchQueue? = nil) -> DispatchSourceWrite {
 #if os(Windows)
 let handle: UInt = UInt(_get_osfhandle(fileDescriptor))