Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6
2019-07-26 19:53:28 +00:00
parent e9207cf623
commit ef583813eb
2712 changed files with 74169 additions and 40587 deletions
--- a/mcs/class/System.Private.CoreLib/System.Threading/Semaphore.Unix.cs
+++ b/mcs/class/System.Private.CoreLib/System.Threading/Semaphore.Unix.cs
@@ -0,0 +1,98 @@
+using System.Runtime.CompilerServices;
+using Microsoft.Win32.SafeHandles;
+using System.IO;
+
+namespace System.Threading
+{
+	partial class Semaphore
+	{
+		const int MAX_PATH = 260;
+
+		Semaphore (SafeWaitHandle handle) => this.SafeWaitHandle = handle;
+
+		int ReleaseCore (int releaseCount)
+		{
+			if (!ReleaseSemaphore_internal (SafeWaitHandle.DangerousGetHandle (), releaseCount, out int previousCount))
+				throw new SemaphoreFullException ();
+
+			return previousCount;
+		}
+
+		static OpenExistingResult OpenExistingWorker (string name, out Semaphore result)
+		{
+			if (name == null)
+				throw new ArgumentNullException (nameof (name));
+
+			if (name.Length  == 0)
+				throw new ArgumentException (SR.Argument_StringZeroLength, nameof (name));
+
+			if (name.Length > MAX_PATH)
+				throw new ArgumentException (SR.Argument_WaitHandleNameTooLong);
+
+			var myHandle = new SafeWaitHandle (OpenSemaphore_internal (name, 
+				/*SemaphoreRights.Modify | SemaphoreRights.Synchronize*/ 0x000002 | 0x100000, 
+				out MonoIOError errorCode), true);
+			
+			if (myHandle.IsInvalid) {
+				result = null;
+				switch (errorCode) {
+					case MonoIOError.ERROR_FILE_NOT_FOUND:
+					case MonoIOError.ERROR_INVALID_NAME:
+						return OpenExistingResult.NameNotFound;
+					case MonoIOError.ERROR_PATH_NOT_FOUND:
+						return OpenExistingResult.PathNotFound;
+					case MonoIOError.ERROR_INVALID_HANDLE when !string.IsNullOrEmpty (name):
+						return OpenExistingResult.NameInvalid;
+					default:
+						//this is for passed through NativeMethods Errors
+						throw new IOException ($"Unknown Error '{errorCode}'");
+				}
+			}
+
+			result = new Semaphore (myHandle);
+			return OpenExistingResult.Success;
+		}
+
+		void CreateSemaphoreCore (int initialCount, int maximumCount, string name, out bool createdNew)
+		{
+			if (name?.Length > MAX_PATH)
+				throw new ArgumentException (SR.Argument_WaitHandleNameTooLong);
+
+			var myHandle = new SafeWaitHandle (CreateSemaphore_internal (initialCount, maximumCount, name, out MonoIOError errorCode), true);
+			
+			if (myHandle.IsInvalid) {
+				if (errorCode == MonoIOError.ERROR_INVALID_HANDLE && !string.IsNullOrEmpty (name))
+					throw new WaitHandleCannotBeOpenedException (SR.Format (SR.Threading_WaitHandleCannotBeOpenedException_InvalidHandle, name));
+
+				throw new IOException ($"Unknown Error '{errorCode}'");
+			}
+
+			this.SafeWaitHandle = myHandle;
+			createdNew = errorCode != MonoIOError.ERROR_ALREADY_EXISTS;
+		}
+
+		unsafe static IntPtr CreateSemaphore_internal (int initialCount, int maximumCount, string name, out MonoIOError errorCode)
+		{
+			// FIXME Check for embedded nuls in name.
+			fixed (char *fixed_name = name)
+				return CreateSemaphore_icall (initialCount, maximumCount,
+					fixed_name, name?.Length ?? 0, out errorCode);
+		}
+
+		unsafe static IntPtr OpenSemaphore_internal (string name, int rights, out MonoIOError errorCode)
+		{
+			// FIXME Check for embedded nuls in name.
+			fixed (char *fixed_name = name)
+				return OpenSemaphore_icall (fixed_name, name?.Length ?? 0, rights, out errorCode);
+		}
+
+		[MethodImplAttribute (MethodImplOptions.InternalCall)]
+		unsafe static extern IntPtr CreateSemaphore_icall (int initialCount, int maximumCount, char* name, int nameLength, out MonoIOError errorCode);
+
+		[MethodImplAttribute (MethodImplOptions.InternalCall)]
+		unsafe static extern IntPtr OpenSemaphore_icall (char* name, int nameLength, int rights, out MonoIOError errorCode);
+
+		[MethodImplAttribute (MethodImplOptions.InternalCall)]
+		static extern bool ReleaseSemaphore_internal (IntPtr handle, int releaseCount, out int previousCount);
+	}
+}