Add **Web platform with Emscripten**

Source/Engine/Platform/Base/PlatformBase.cpp

@@ -44,7 +44,7 @@ static_assert(sizeof(double) == 8, "Invalid double type size.");
 
 // Check configuration
 static_assert((PLATFORM_THREADS_LIMIT & (PLATFORM_THREADS_LIMIT - 1)) == 0, "Threads limit must be power of two.");
-static_assert(PLATFORM_THREADS_LIMIT % 4 == 0, "Threads limit must be multiple of 4.");
+static_assert(PLATFORM_THREADS_LIMIT % 4 == 0 || PLATFORM_THREADS_LIMIT == 1, "Threads limit must be multiple of 4.");
 
 const Char* PlatformBase::ApplicationClassName = TEXT("FlaxWindow");
 float PlatformBase::CustomDpiScale = 1.0f;
@@ -301,6 +301,15 @@ bool PlatformBase::Is64BitApp()
 #endif
 }
 
+bool PlatformBase::Is64BitPlatform()
+{
+#if PLATFORM_64BITS
+    return true;
+#else
+    return false;
+#endif
+}
+
 int32 PlatformBase::GetCacheLineSize()
 {
     return (int32)Platform::GetCPUInfo().CacheLineSize;
@@ -820,6 +829,8 @@ const Char* ToString(PlatformType type)
         return TEXT("Mac");
     case PlatformType::iOS:
         return TEXT("iOS");
+    case PlatformType::Web:
+        return TEXT("Web");
     default:
         return TEXT("");
     }

Source/Engine/Platform/Base/PlatformBase.h

@@ -378,7 +378,7 @@ public:
     /// Returns true if running on 64-bit computer
     /// </summary>
     /// <returns>True if running on 64-bit computer, otherwise false.</returns>
-    API_PROPERTY() static bool Is64BitPlatform() = delete;
+    API_PROPERTY() static bool Is64BitPlatform();
 
     /// <summary>
     /// Gets the name of the operating system.
@@ -470,7 +470,11 @@ public:
     /// Gets the system clock frequency.
     /// </summary>
     /// <returns>The clock frequency.</returns>
-    API_PROPERTY() static uint64 GetClockFrequency() = delete;
+    API_PROPERTY() static uint64 GetClockFrequency()
+    {
+        // Dummy value
+        return 1000000;
+    }
 
     /// <summary>
     /// Gets current system time based on current computer settings.

Source/Engine/Platform/Base/ThreadBase.cpp

@@ -48,7 +48,7 @@ void ThreadBase::Kill(bool waitForJoin)
         return;
     }
     ASSERT(GetID());
-    const auto thread = static_cast<Thread*>(this);
+    Thread* thread = (Thread*)this;
 
     // Stop runnable object
     if (_callAfterWork && _runnable)