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#region Copyright notice and license
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System;
using System.Collections.Concurrent;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Threading;
using Grpc.Core.Utils;
namespace Grpc.Core.Internal
{
/// <summary>
/// Utility methods for detecting platform and architecture.
/// </summary>
internal static class PlatformApis
{
const string UnityEngineApplicationClassName = "UnityEngine.Application, UnityEngine";
const string XamarinAndroidObjectClassName = "Java.Lang.Object, Mono.Android";
const string XamarinIOSObjectClassName = "Foundation.NSObject, Xamarin.iOS";
static readonly bool isLinux;
static readonly bool isMacOSX;
static readonly bool isWindows;
static readonly bool isMono;
static readonly bool isNetCore;
static readonly bool isUnity;
static readonly bool isUnityIOS;
static readonly bool isXamarin;
static readonly bool isXamarinIOS;
static readonly bool isXamarinAndroid;
static PlatformApis()
{
#if NETSTANDARD1_5
isLinux = RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
isMacOSX = RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
isNetCore = RuntimeInformation.FrameworkDescription.StartsWith(".NET Core");
#else
var platform = Environment.OSVersion.Platform;
// PlatformID.MacOSX is never returned, commonly used trick is to identify Mac is by using uname.
isMacOSX = (platform == PlatformID.Unix && GetUname() == "Darwin");
isLinux = (platform == PlatformID.Unix && !isMacOSX);
isWindows = (platform == PlatformID.Win32NT || platform == PlatformID.Win32S || platform == PlatformID.Win32Windows);
isNetCore = false;
#endif
isMono = Type.GetType("Mono.Runtime") != null;
// Unity
var unityApplicationClass = Type.GetType(UnityEngineApplicationClassName);
if (unityApplicationClass != null)
{
isUnity = true;
// Consult value of Application.platform via reflection
// https://docs.unity3d.com/ScriptReference/Application-platform.html
var platformProperty = unityApplicationClass.GetTypeInfo().GetProperty("platform");
var unityRuntimePlatform = platformProperty?.GetValue(null)?.ToString();
isUnityIOS = (unityRuntimePlatform == "IPhonePlayer");
}
else
{
isUnity = false;
isUnityIOS = false;
}
// Xamarin
isXamarinIOS = Type.GetType(XamarinIOSObjectClassName) != null;
isXamarinAndroid = Type.GetType(XamarinAndroidObjectClassName) != null;
isXamarin = isXamarinIOS || isXamarinAndroid;
}
public static bool IsLinux
{
get { return isLinux; }
}
public static bool IsMacOSX
{
get { return isMacOSX; }
}
public static bool IsWindows
{
get { return isWindows; }
}
public static bool IsMono
{
get { return isMono; }
}
/// <summary>
/// true if running on Unity platform.
/// </summary>
public static bool IsUnity
{
get { return isUnity; }
}
/// <summary>
/// true if running on Unity iOS, false otherwise.
/// </summary>
public static bool IsUnityIOS
{
get { return isUnityIOS; }
}
/// <summary>
/// true if running on a Xamarin platform (either Xamarin.Android or Xamarin.iOS),
/// false otherwise.
/// </summary>
public static bool IsXamarin
{
get { return isXamarin; }
}
/// <summary>
/// true if running on Xamarin.iOS, false otherwise.
/// </summary>
public static bool IsXamarinIOS
{
get { return isXamarinIOS; }
}
/// <summary>
/// true if running on Xamarin.Android, false otherwise.
/// </summary>
public static bool IsXamarinAndroid
{
get { return isXamarinAndroid; }
}
/// <summary>
/// true if running on .NET Core (CoreCLR), false otherwise.
/// </summary>
public static bool IsNetCore
{
get { return isNetCore; }
}
public static bool Is64Bit
{
get { return IntPtr.Size == 8; }
}
/// <summary>
/// Returns <c>UnityEngine.Application.platform</c> as a string.
/// See https://docs.unity3d.com/ScriptReference/Application-platform.html for possible values.
/// Value is obtained via reflection to avoid compile-time dependency on Unity.
/// This method should only be called if <c>IsUnity</c> is <c>true</c>.
/// </summary>
public static string GetUnityRuntimePlatform()
{
GrpcPreconditions.CheckState(IsUnity, "Not running on Unity.");
#if NETSTANDARD1_5
return Type.GetType(UnityEngineApplicationClassName).GetTypeInfo().GetProperty("platform").GetValue(null).ToString();
#else
return Type.GetType(UnityEngineApplicationClassName).GetProperty("platform").GetValue(null).ToString();
#endif
}
[DllImport("libc")]
static extern int uname(IntPtr buf);
static string GetUname()
{
var buffer = Marshal.AllocHGlobal(8192);
try
{
if (uname(buffer) == 0)
{
return Marshal.PtrToStringAnsi(buffer);
}
return string.Empty;
}
catch
{
return string.Empty;
}
finally
{
if (buffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(buffer);
}
}
}
}
}
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