Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs

Index: third_party/grpc/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/ByteArray.cs b/third_party/grpc/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs
similarity index 52%
copy from third_party/protobuf/csharp/src/Google.Protobuf/ByteArray.cs
copy to third_party/grpc/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs
index b19962794b0d052b467fd2007fd09ad1d7fe6d54..65cc2e019fdf8a462b20a5f370f1bed99623c22e 100644
--- a/third_party/protobuf/csharp/src/Google.Protobuf/ByteArray.cs
+++ b/third_party/grpc/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs
@@ -1,7 +1,6 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
+#region Copyright notice and license
+// Copyright 2015-2016, Google Inc.
+// All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
@@ -29,51 +28,52 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #endregion
-
 using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
 
-namespace Google.Protobuf
+namespace Grpc.Core.Internal
 {
     /// <summary>
-    /// Provides a utility routine to copy small arrays much more quickly than Buffer.BlockCopy
+    /// grpc_channel_credentials from <c>grpc/grpc_security.h</c>
     /// </summary>
-    internal static class ByteArray
+    internal class ChannelCredentialsSafeHandle : SafeHandleZeroIsInvalid
     {
-        /// <summary>
-        /// The threshold above which you should use Buffer.BlockCopy rather than ByteArray.Copy
-        /// </summary>
-        private const int CopyThreshold = 12;
+        static readonly NativeMethods Native = NativeMethods.Get();
+
+        private ChannelCredentialsSafeHandle()
+        {
+        }
+
+        public static ChannelCredentialsSafeHandle CreateNullCredentials()
+        {
+            var creds = new ChannelCredentialsSafeHandle();
+            creds.SetHandle(IntPtr.Zero);
+            return creds;
+        }
 
-        /// <summary>
-        /// Determines which copy routine to use based on the number of bytes to be copied.
-        /// </summary>
-        internal static void Copy(byte[] src, int srcOffset, byte[] dst, int dstOffset, int count)
+        public static ChannelCredentialsSafeHandle CreateSslCredentials(string pemRootCerts, KeyCertificatePair keyCertPair)
         {
-            if (count > CopyThreshold)
+            if (keyCertPair != null)
             {
-                Buffer.BlockCopy(src, srcOffset, dst, dstOffset, count);
+                return Native.grpcsharp_ssl_credentials_create(pemRootCerts, keyCertPair.CertificateChain, keyCertPair.PrivateKey);
             }
             else
             {
-                int stop = srcOffset + count;
-                for (int i = srcOffset; i < stop; i++)
-                {
-                    dst[dstOffset++] = src[i];
-                }
+                return Native.grpcsharp_ssl_credentials_create(pemRootCerts, null, null);
             }
         }
 
-        /// <summary>
-        /// Reverses the order of bytes in the array
-        /// </summary>
-        internal static void Reverse(byte[] bytes)
+        public static ChannelCredentialsSafeHandle CreateComposite(ChannelCredentialsSafeHandle channelCreds, CallCredentialsSafeHandle callCreds)
         {
-            for (int first = 0, last = bytes.Length - 1; first < last; first++, last--)
-            {
-                byte temp = bytes[first];
-                bytes[first] = bytes[last];
-                bytes[last] = temp;
-            }
+            return Native.grpcsharp_composite_channel_credentials_create(channelCreds, callCreds);
+        }
+
+        protected override bool ReleaseHandle()
+        {
+            Native.grpcsharp_channel_credentials_release(handle);
+            return true;
         }
     }
-}
+}