snes9x - cleanup usage of the IMonitor semantics. This makes memory domains slower.

BizHawk.Emulation.Common/Base Implementations/MemoryDomainImpls.cs

@@ -1,4 +1,5 @@
-using System;
+using BizHawk.Common;
+using System;
 
 namespace BizHawk.Emulation.Common
 {
@@ -134,6 +135,60 @@ namespace BizHawk.Emulation.Common
 		}
 	}
 
+	public unsafe class MemoryDomainIntPtrMonitor : MemoryDomain
+	{
+		public IntPtr Data { get; set; }
+		private readonly IMonitor _monitor;
+
+		public override byte PeekByte(long addr)
+		{
+			if ((ulong)addr < (ulong)Size)
+			{
+				using (_monitor.EnterExit())
+				{
+					return ((byte*)Data)[addr];
+				}
+			}
+
+			throw new ArgumentOutOfRangeException(nameof(addr));
+		}
+
+		public override void PokeByte(long addr, byte val)
+		{
+			if (Writable)
+			{
+				if ((ulong)addr < (ulong)Size)
+				{
+					using (_monitor.EnterExit())
+					{
+						((byte*)Data)[addr] = val;
+					}
+				}
+				else
+				{
+					throw new ArgumentOutOfRangeException(nameof(addr));
+				}
+			}
+		}
+
+		public void SetSize(long size)
+		{
+			Size = size;
+		}
+
+		public MemoryDomainIntPtrMonitor(string name, Endian endian, IntPtr data, long size, bool writable, int wordSize,
+			IMonitor monitor)
+		{
+			Name = name;
+			EndianType = endian;
+			Data = data;
+			Size = size;
+			Writable = writable;
+			WordSize = wordSize;
+			_monitor = monitor;
+		}
+	}
+
 	public unsafe class MemoryDomainIntPtrSwap16 : MemoryDomain
 	{
 		public IntPtr Data { get; set; }

BizHawk.Emulation.Cores/Consoles/Nintendo/SNES9X/Snes9x.cs

@@ -39,8 +39,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES9X
 				SpecialHeapSizeKB = 64
 			});
 
-			try
-			{
 			_core = BizInvoker.GetInvoker<LibSnes9x>(_exe, _exe);
 			if (!_core.biz_init())
 			{
@@ -74,12 +72,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES9X
 			InitMemoryDomains();
 			InitSaveram();
 		}
-			catch
-			{
-				Dispose();
-				throw;
-			}
-		}
 
 		#region controller
 
@@ -319,9 +311,12 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES9X
 			LibSnes9x.frame_info frame = new LibSnes9x.frame_info();
 
 			_core.biz_run(frame, _inputState);
+			using (_exe.EnterExit())
+			{
 				Blit(frame);
 				Sblit(frame);
 			}
+		}
 
 		public int Frame { get; private set; }
 
@@ -644,8 +639,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES9X
 				_core.biz_get_memory_area(index++, native);
 				if (native.ptr != IntPtr.Zero && native.size > 0)
 				{
-					domains.Add(new MemoryDomainIntPtr(s, MemoryDomain.Endian.Little,
-						native.ptr, native.size, true, 2));
+					domains.Add(new MemoryDomainIntPtrMonitor(s, MemoryDomain.Endian.Little,
+						native.ptr, native.size, true, 2, _exe));
 				}
 			}
 			(ServiceProvider as BasicServiceProvider).Register<IMemoryDomains>(new MemoryDomainList(domains)
@@ -677,6 +672,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES9X
 		public bool SaveRamModified => _saveramSize > 0;
 
 		public byte[] CloneSaveRam()
+		{
+			using (_exe.EnterExit())
 			{
 				var ret = new byte[_saveramSize];
 				var offset = 0;
@@ -685,15 +682,16 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES9X
 					Marshal.Copy(area.ptr, ret, offset, area.size);
 					offset += area.size;
 				}
-
 				return ret;
 			}
+		}
 
 		public void StoreSaveRam(byte[] data)
+		{
+			using (_exe.EnterExit())
 			{
 				if (data.Length != _saveramSize)
 					throw new InvalidOperationException("Saveram size mismatch");
-
 				var offset = 0;
 				foreach (var area in _saveramMemoryAreas)
 				{
@@ -701,6 +699,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.SNES9X
 					offset += area.size;
 				}
 			}
+		}
 
 		#endregion
 	}

BizHawk.Emulation.Cores/Waterbox/PeRunner.cs

@@ -565,8 +565,7 @@ namespace BizHawk.Emulation.Cores.Waterbox
 		public PeRunner(PeRunnerOptions opt)
 		{
 			Initialize(_nextStart);
-			Enter();
-			try
+			using (this.EnterExit())
 			{ 
 				// load any predefined exports
 				_psx = new Psx(this);
@@ -644,15 +643,6 @@ namespace BizHawk.Emulation.Cores.Waterbox
 					m.RunGlobalCtors();
 				}*/
 			}
-			catch
-			{
-				Dispose();
-				throw;
-			}
-			finally
-			{
-				Exit();
-			}
 		}
 
 		public IntPtr Resolve(string entryPoint)