Added fully native memory allocation functions that are passed directly to EOS without any P/Invoke in-between. This makes EOS work on PS4 & PS5 without causing thread semaphore crashes in Unity.

Assets/Plugins/PS5.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 0677463dddd99144083c9a34be65a720
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Plugins/PS5/PS5Utils.prx.meta

@@ -0,0 +1,32 @@
+fileFormatVersion: 2
+guid: 43fd785f2224f2745a11794c21b7e30c
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
+  isOverridable: 0
+  isExplicitlyReferenced: 0
+  validateReferences: 1
+  platformData:
+  - first:
+      Any: 
+    second:
+      enabled: 0
+      settings: {}
+  - first:
+      Editor: Editor
+    second:
+      enabled: 0
+      settings:
+        DefaultValueInitialized: true
+  - first:
+      PS5: PS5
+    second:
+      enabled: 1
+      settings: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/EOSNativeHelper.cs

@@ -3,6 +3,7 @@ using System.IO;
 using System.Runtime.InteropServices;
 using AOT;
 using Epic.OnlineServices;
+using Epic.OnlineServices.Platform;
 
 public static class EOSNativeHelper
 {
@@ -28,29 +29,24 @@ public static class EOSNativeHelper
 
     [DllImport("kernel32")]
     public static extern IntPtr GetProcAddress(IntPtr hModule, string procedureName);
-#endif
 
-    [UnmanagedFunctionPointer(Config.LibraryCallingConvention)]
-    public delegate IntPtr AllocateMemoryFunc(IntPtr size, IntPtr alignment);
+#else
     
     [MonoPInvokeCallback(typeof(AllocateMemoryFunc))]
-    public static IntPtr AllocateMemory(IntPtr size, IntPtr alignment)
+    public static IntPtr AllocateMemory(UIntPtr size, UIntPtr alignment)
     {
-        return Marshal.AllocHGlobal(size);
+        return Marshal.AllocHGlobal((IntPtr)size.ToUInt64());
         //return HeapAlloc(GetProcessHeap(), 0, size);
     }
-
-    [UnmanagedFunctionPointer(Config.LibraryCallingConvention)]
-    public delegate IntPtr ReallocateMemoryFunc(IntPtr pointer, IntPtr size, IntPtr alignment);
     
     [MonoPInvokeCallback(typeof(ReallocateMemoryFunc))]
-    public static IntPtr ReallocateMemory(IntPtr pointer, IntPtr size, IntPtr alignment)
+    public static IntPtr ReallocateMemory(IntPtr pointer, UIntPtr size, UIntPtr alignment)
     {
         // EOS will sometimes request a reallocation for a null pointer, so we need to specifically handle that
         if (pointer == IntPtr.Zero)
-            return Marshal.AllocHGlobal(size);
+            return Marshal.AllocHGlobal((IntPtr)size.ToUInt64());
         
-        return Marshal.ReAllocHGlobal(pointer, size);
+        return Marshal.ReAllocHGlobal(pointer, (IntPtr)size.ToUInt64());
 
         // if (pointer == IntPtr.Zero)
         //     return HeapAlloc(GetProcessHeap(), 0, size);
@@ -58,9 +54,6 @@ public static class EOSNativeHelper
         // return HeapReAlloc(GetProcessHeap(), 0, pointer, size);
     }
 
-    [UnmanagedFunctionPointer(Config.LibraryCallingConvention)]
-    public delegate void ReleaseMemoryFunc(IntPtr pointer);
-
     [MonoPInvokeCallback(typeof(ReleaseMemoryFunc))]
     public static void ReleaseMemory(IntPtr pointer)
     {
@@ -80,4 +73,11 @@ public static class EOSNativeHelper
     [DllImport("kernel32")]
     [return: MarshalAs(UnmanagedType.Bool)]
     private static extern bool HeapFree(IntPtr hHeap, int dwFlags, IntPtr lpMem);
+    
+#endif
+    
+#if UNITY_PS4 || UNITY_PS5
+    [DllImport("PS5Utils.prx")]
+    public static extern void GetMemoryFunctions(out IntPtr allocFunc, out IntPtr reallocFunc, out IntPtr releaseFunc);
+#endif
 }

Assets/Scripts/EpicVoiceChatTest.cs

@@ -121,19 +121,27 @@ public class EpicVoiceChatTest : MonoBehaviour
         // This delay is just here to give us some time to connect the debugger
         yield return new WaitForSeconds(5f);
 #endif
+
+#if UNITY_PS4 || UNITY_PS5
+        EOSNativeHelper.GetMemoryFunctions(out var allocFunc, out var reallocFunc, out var releaseFunc);
+#endif
         
         var result = PlatformInterface.Initialize(new InitializeOptions
         {
             ProductName = "WW1Test",
             ProductVersion = "1.0.0.0",
-#if UNITY_GAMECORE || UNITY_PS4 || UNITY_PS5
+#if UNITY_GAMECORE
             // EOS SDK on Game Core will not initialize without these memory management function pointers
-            AllocateMemoryFunction = Marshal.GetFunctionPointerForDelegate((EOSNativeHelper.AllocateMemoryFunc)EOSNativeHelper.AllocateMemory),
-            ReallocateMemoryFunction = Marshal.GetFunctionPointerForDelegate((EOSNativeHelper.ReallocateMemoryFunc)EOSNativeHelper.ReallocateMemory),
-            ReleaseMemoryFunction = Marshal.GetFunctionPointerForDelegate((EOSNativeHelper.ReleaseMemoryFunc)EOSNativeHelper.ReleaseMemory),
+            AllocateMemoryFunction = Marshal.GetFunctionPointerForDelegate((AllocateMemoryFunc)EOSNativeHelper.AllocateMemory),
+            ReallocateMemoryFunction = Marshal.GetFunctionPointerForDelegate((ReallocateMemoryFunc)EOSNativeHelper.ReallocateMemory),
+            ReleaseMemoryFunction = Marshal.GetFunctionPointerForDelegate((ReleaseMemoryFunc)EOSNativeHelper.ReleaseMemory),
+#elif UNITY_PS4 || UNITY_PS5
+            AllocateMemoryFunction = allocFunc,
+            ReallocateMemoryFunction = reallocFunc,
+            ReleaseMemoryFunction = releaseFunc,
 #endif
         });
-
+      
         if (result != Result.Success)
         {
             Debug.LogError("Failed to initialize EOS, result = " + result);