Align memory alloc.

src/CppParser/Bindings/CSharp/arm64-apple-darwin/Std.cs

@@ -8,6 +8,7 @@ using System;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Security;
+using __NativeMemory = global::System.Runtime.InteropServices.NativeMemory;
 using __CallingConvention = global::System.Runtime.InteropServices.CallingConvention;
 using __IntPtr = global::System.IntPtr;
 
@@ -110,7 +111,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.CharTraits.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.CharTraits.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.CharTraits.__Internal), 16);
             *(global::Std.CharTraits.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -143,7 +144,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -243,7 +244,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.Allocator.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
             *(global::Std.Allocator.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -267,7 +268,7 @@ namespace Std
             var ___Tp = typeof(_Tp);
             if (___Tp.IsAssignableFrom(typeof(sbyte)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.Allocator.__Internal.ctorc__N_std_N___1_S_allocator__C(__Instance);
@@ -290,7 +291,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -439,7 +440,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C), 16);
             *(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C*) ret = native;
             return ret.ToPointer();
         }
@@ -465,7 +466,7 @@ namespace Std
             var ___Allocator = typeof(_Allocator);
             if (___CharT.IsAssignableFrom(typeof(sbyte)) && ___Traits.IsAssignableFrom(typeof(global::Std.CharTraits<sbyte>)) && ___Allocator.IsAssignableFrom(typeof(global::Std.Allocator<sbyte>)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C.ctorc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C(__Instance);
@@ -499,7 +500,7 @@ namespace Std
                 throw new ArgumentOutOfRangeException("_CharT, _Traits, _Allocator", string.Join(", ", new[] { typeof(_CharT).FullName, typeof(_Traits).FullName, typeof(_Allocator).FullName }), "global::Std.BasicString<_CharT, _Traits, _Allocator> maps a C++ template class and therefore it only supports a limited set of types and their subclasses: <sbyte, global::Std.CharTraits<sbyte>, global::Std.Allocator<sbyte>>.");
             }
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }

src/CppParser/Bindings/CSharp/i686-apple-darwin/Std.cs

@@ -8,6 +8,7 @@ using System;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Security;
+using __NativeMemory = global::System.Runtime.InteropServices.NativeMemory;
 using __CallingConvention = global::System.Runtime.InteropServices.CallingConvention;
 using __IntPtr = global::System.IntPtr;
 
@@ -110,7 +111,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.CharTraits.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.CharTraits.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.CharTraits.__Internal), 16);
             *(global::Std.CharTraits.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -143,7 +144,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -243,7 +244,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.Allocator.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
             *(global::Std.Allocator.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -267,7 +268,7 @@ namespace Std
             var ___Tp = typeof(_Tp);
             if (___Tp.IsAssignableFrom(typeof(sbyte)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.Allocator.__Internal.ctorc__N_std_N___1_S_allocator__C(__Instance);
@@ -290,7 +291,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -474,7 +475,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C), 16);
             *(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C*) ret = native;
             return ret.ToPointer();
         }
@@ -500,7 +501,7 @@ namespace Std
             var ___Allocator = typeof(_Allocator);
             if (___CharT.IsAssignableFrom(typeof(sbyte)) && ___Traits.IsAssignableFrom(typeof(global::Std.CharTraits<sbyte>)) && ___Allocator.IsAssignableFrom(typeof(global::Std.Allocator<sbyte>)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C.ctorc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C(__Instance);
@@ -535,7 +536,7 @@ namespace Std
                 throw new ArgumentOutOfRangeException("_CharT, _Traits, _Allocator", string.Join(", ", new[] { typeof(_CharT).FullName, typeof(_Traits).FullName, typeof(_Allocator).FullName }), "global::Std.BasicString<_CharT, _Traits, _Allocator> maps a C++ template class and therefore it only supports a limited set of types and their subclasses: <sbyte, global::Std.CharTraits<sbyte>, global::Std.Allocator<sbyte>>.");
             }
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }

src/CppParser/Bindings/CSharp/x86_64-apple-darwin/Std.cs

@@ -8,6 +8,7 @@ using System;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Security;
+using __NativeMemory = global::System.Runtime.InteropServices.NativeMemory;
 using __CallingConvention = global::System.Runtime.InteropServices.CallingConvention;
 using __IntPtr = global::System.IntPtr;
 
@@ -110,7 +111,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.CharTraits.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.CharTraits.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.CharTraits.__Internal), 16);
             *(global::Std.CharTraits.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -143,7 +144,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -243,7 +244,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.Allocator.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
             *(global::Std.Allocator.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -267,7 +268,7 @@ namespace Std
             var ___Tp = typeof(_Tp);
             if (___Tp.IsAssignableFrom(typeof(sbyte)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.Allocator.__Internal.ctorc__N_std_N___1_S_allocator__C(__Instance);
@@ -290,7 +291,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -474,7 +475,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C), 16);
             *(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C*) ret = native;
             return ret.ToPointer();
         }
@@ -500,7 +501,7 @@ namespace Std
             var ___Allocator = typeof(_Allocator);
             if (___CharT.IsAssignableFrom(typeof(sbyte)) && ___Traits.IsAssignableFrom(typeof(global::Std.CharTraits<sbyte>)) && ___Allocator.IsAssignableFrom(typeof(global::Std.Allocator<sbyte>)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.BasicString.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C.ctorc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C(__Instance);
@@ -535,7 +536,7 @@ namespace Std
                 throw new ArgumentOutOfRangeException("_CharT, _Traits, _Allocator", string.Join(", ", new[] { typeof(_CharT).FullName, typeof(_Traits).FullName, typeof(_Allocator).FullName }), "global::Std.BasicString<_CharT, _Traits, _Allocator> maps a C++ template class and therefore it only supports a limited set of types and their subclasses: <sbyte, global::Std.CharTraits<sbyte>, global::Std.Allocator<sbyte>>.");
             }
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }

src/CppParser/Bindings/CSharp/x86_64-linux-gnu-cxx11abi/Std.cs

@@ -8,6 +8,7 @@ using System;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Security;
+using __NativeMemory = global::System.Runtime.InteropServices.NativeMemory;
 using __CallingConvention = global::System.Runtime.InteropServices.CallingConvention;
 using __IntPtr = global::System.IntPtr;
 
@@ -79,7 +80,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.Allocator.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
             *(global::Std.Allocator.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -103,7 +104,7 @@ namespace Std
             var ___Tp = typeof(_Tp);
             if (___Tp.IsAssignableFrom(typeof(sbyte)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.Allocator.__Internal.ctorc__N_std_S_allocator__C(__Instance);
@@ -136,7 +137,7 @@ namespace Std
                 throw new ArgumentOutOfRangeException("_Tp", string.Join(", ", new[] { typeof(_Tp).FullName }), "global::Std.Allocator<_Tp> maps a C++ template class and therefore it only supports a limited set of types and their subclasses: <sbyte>.");
             }
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -285,7 +286,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.CharTraits.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.CharTraits.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.CharTraits.__Internal), 16);
             *(global::Std.CharTraits.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -318,7 +319,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -421,7 +422,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.BasicString.__Internalc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C), 16);
             *(global::Std.BasicString.__Internalc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C*) ret = native;
             return ret.ToPointer();
         }
@@ -447,7 +448,7 @@ namespace Std
             var ___Alloc = typeof(_Alloc);
             if (___CharT.IsAssignableFrom(typeof(sbyte)) && ___Traits.IsAssignableFrom(typeof(global::Std.CharTraits<sbyte>)) && ___Alloc.IsAssignableFrom(typeof(global::Std.Allocator<sbyte>)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internalc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internalc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.BasicString.__Internalc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C.ctorc__N_std_N___cxx11_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C(__Instance);
@@ -482,7 +483,7 @@ namespace Std
                 throw new ArgumentOutOfRangeException("_CharT, _Traits, _Alloc", string.Join(", ", new[] { typeof(_CharT).FullName, typeof(_Traits).FullName, typeof(_Alloc).FullName }), "global::Std.BasicString<_CharT, _Traits, _Alloc> maps a C++ template class and therefore it only supports a limited set of types and their subclasses: <sbyte, global::Std.CharTraits<sbyte>, global::Std.Allocator<sbyte>>.");
             }
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }

src/CppParser/Bindings/CSharp/x86_64-linux-gnu/Std.cs

@@ -8,6 +8,7 @@ using System;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Security;
+using __NativeMemory = global::System.Runtime.InteropServices.NativeMemory;
 using __CallingConvention = global::System.Runtime.InteropServices.CallingConvention;
 using __IntPtr = global::System.IntPtr;
 
@@ -79,7 +80,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.Allocator.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
             *(global::Std.Allocator.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -103,7 +104,7 @@ namespace Std
             var ___Tp = typeof(_Tp);
             if (___Tp.IsAssignableFrom(typeof(sbyte)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.Allocator.__Internal));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.Allocator.__Internal), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.Allocator.__Internal.ctorc__N_std_S_allocator__C(__Instance);
@@ -136,7 +137,7 @@ namespace Std
                 throw new ArgumentOutOfRangeException("_Tp", string.Join(", ", new[] { typeof(_Tp).FullName }), "global::Std.Allocator<_Tp> maps a C++ template class and therefore it only supports a limited set of types and their subclasses: <sbyte>.");
             }
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -285,7 +286,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.CharTraits.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.CharTraits.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.CharTraits.__Internal), 16);
             *(global::Std.CharTraits.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -318,7 +319,7 @@ namespace Std
             NativeToManagedMap.TryRemove(__Instance, out _);
             DisposePartial(disposing);
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }
@@ -397,7 +398,7 @@ namespace Std
 
         private static void* __CopyValue(global::Std.BasicString.__Internal native)
         {
-            var ret = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internal));
+            var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internal), 16);
             *(global::Std.BasicString.__Internal*) ret = native;
             return ret.ToPointer();
         }
@@ -423,7 +424,7 @@ namespace Std
             var ___Alloc = typeof(_Alloc);
             if (___CharT.IsAssignableFrom(typeof(sbyte)) && ___Traits.IsAssignableFrom(typeof(global::Std.CharTraits<sbyte>)) && ___Alloc.IsAssignableFrom(typeof(global::Std.Allocator<sbyte>)))
             {
-                __Instance = Marshal.AllocHGlobal(sizeof(global::Std.BasicString.__Internal));
+                __Instance = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof(global::Std.BasicString.__Internal), 16);
                 __ownsNativeInstance = true;
                 __RecordNativeToManagedMapping(__Instance, this);
                 global::Std.BasicString.__Internal.ctorc__N_std_S_basic_string__C___N_std_S_char_traits__C___N_std_S_allocator__C(__Instance);
@@ -458,7 +459,7 @@ namespace Std
                 throw new ArgumentOutOfRangeException("_CharT, _Traits, _Alloc", string.Join(", ", new[] { typeof(_CharT).FullName, typeof(_Traits).FullName, typeof(_Alloc).FullName }), "global::Std.BasicString<_CharT, _Traits, _Alloc> maps a C++ template class and therefore it only supports a limited set of types and their subclasses: <sbyte, global::Std.CharTraits<sbyte>, global::Std.Allocator<sbyte>>.");
             }
             if (__ownsNativeInstance)
-                Marshal.FreeHGlobal(__Instance);
+                __NativeMemory.AlignedFree((void*)__Instance);
             __Instance = IntPtr.Zero;
         }
     }

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -172,6 +172,7 @@ namespace CppSharp.Generators.CSharp
             foreach (var @namespace in requiredNameSpaces.Union(Options.DependentNameSpaces).OrderBy(x => x))
                 WriteLine($"using {@namespace};");
 
+            WriteLine("using __NativeMemory = global::System.Runtime.InteropServices.NativeMemory;");
             WriteLine("using __CallingConvention = global::System.Runtime.InteropServices.CallingConvention;");
             WriteLine("using __IntPtr = global::System.IntPtr;");
 
@@ -2394,7 +2395,7 @@ internal static bool {Helpers.TryGetNativeToManagedMappingIdentifier}(IntPtr nat
             {
                 string name = prop.Field.OriginalName;
                 WriteLine($"if (__{name}_OwnsNativeMemory)");
-                WriteLineIndent($"Marshal.FreeHGlobal({ptr}->{name});");
+                WriteLineIndent($"__NativeMemory.AlignedFree((void*){ptr}->{name});");
             }
 
             if (@class.IsValueType)
@@ -2404,7 +2405,7 @@ internal static bool {Helpers.TryGetNativeToManagedMappingIdentifier}(IntPtr nat
             else
             {
                 WriteLine("if ({0})", Helpers.OwnsNativeInstanceIdentifier);
-                WriteLineIndent("Marshal.FreeHGlobal({0});", Helpers.InstanceIdentifier);
+                WriteLineIndent("__NativeMemory.AlignedFree((void*){0});", Helpers.InstanceIdentifier);
 
                 WriteLine("{0} = IntPtr.Zero;", Helpers.InstanceIdentifier);
             }
@@ -2606,14 +2607,14 @@ internal static{(@new ? " new" : string.Empty)} {printedClass} __GetInstance({Ty
                     string defaultValue = string.Empty;
                     if (copyCtorMethod.Parameters.Count > 1)
                         defaultValue = $", {ExpressionPrinter.VisitParameter(copyCtorMethod.Parameters.Last())}";
-                    WriteLine($@"var ret = Marshal.AllocHGlobal(sizeof({@internal}));");
+                    WriteLine($@"var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof({@internal}), 16);");
                     WriteLine($@"{printed}.{GetFunctionNativeIdentifier(copyCtorMethod)}(ret, new {TypePrinter.IntPtrType}(&native){defaultValue});",
                         printed, GetFunctionNativeIdentifier(copyCtorMethod));
                     WriteLine("return ret.ToPointer();");
                 }
                 else
                 {
-                    WriteLine($"var ret = Marshal.AllocHGlobal(sizeof({@internal}));");
+                    WriteLine($"var ret = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof({@internal}), 16);");
                     WriteLine($"*({@internal}*) ret = native;");
                     WriteLine("return ret.ToPointer();");
                 }
@@ -3041,7 +3042,7 @@ internal static{(@new ? " new" : string.Empty)} {printedClass} __GetInstance({Ty
 
             var @internal = TypePrinter.PrintNative(
                 @class.IsAbstractImpl ? @class.BaseClass : @class);
-            WriteLine($"{Helpers.InstanceIdentifier} = Marshal.AllocHGlobal(sizeof({@internal}));");
+            WriteLine($"{Helpers.InstanceIdentifier} = (nint)__NativeMemory.AlignedAlloc((nuint)sizeof({@internal}), 16);");
             WriteLine($"{Helpers.OwnsNativeInstanceIdentifier} = true;");
 
             if (generateNativeToManaged)
@@ -3223,7 +3224,7 @@ internal static{(@new ? " new" : string.Empty)} {printedClass} __GetInstance({Ty
             if (method != null && !method.IsConstructor && method.OriginalFunction != null &&
                 ((Method)method.OriginalFunction).IsConstructor)
             {
-                WriteLine($@"Marshal.AllocHGlobal({((Class)method.OriginalNamespace).Layout.Size});");
+                WriteLine($@"(nint)__NativeMemory.AlignedAlloc((nuint){((Class)method.OriginalNamespace).Layout.Size}, 16);");
                 names.Insert(0, Helpers.ReturnIdentifier);
             }
             WriteLine("{0}({1});", functionName, string.Join(", ", names));