PlatformMisc: add SetProcessAffinity and GetProcessAffinity

Author: TheMostDiligent

Platforms/Basic/interface/BasicPlatformMisc.hpp

@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019-2025 Diligent Graphics LLC
+ *  Copyright 2019-2026 Diligent Graphics LLC
  *  Copyright 2015-2019 Egor Yusov
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
@@ -111,6 +111,13 @@ struct BasicPlatformMisc
     /// Sets the current thread affinity mask and on success returns the previous mask.
     static Uint64 SetCurrentThreadAffinity(Uint64 Mask);
 
+    /// Sets the current process affinity mask.
+    /// On success, returns true. On failure, returns false and the affinity mask is not changed.
+    static Bool SetProcessAffinity(Uint64 Mask);
+
+    /// Returns the current process affinity mask. On failure, returns 0.
+    static Uint64 GetProcessAffinity();
+
     /// Sets the name of the current thread.
     static void SetCurrentThreadName(const char* Name);
 

Platforms/Basic/src/BasicPlatformMisc.cpp

@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019-2025 Diligent Graphics LLC
+ *  Copyright 2019-2026 Diligent Graphics LLC
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -48,6 +48,18 @@ Uint64 BasicPlatformMisc::SetCurrentThreadAffinity(Uint64 Mask)
     return 0;
 }
 
+Bool BasicPlatformMisc::SetProcessAffinity(Uint64 Mask)
+{
+    LOG_WARNING_MESSAGE_ONCE("SetProcessAffinity is not implemented on this platform.");
+    return false;
+}
+
+Uint64 BasicPlatformMisc::GetProcessAffinity()
+{
+    LOG_WARNING_MESSAGE_ONCE("GetProcessAffinity is not implemented on this platform.");
+    return 0;
+}
+
 void BasicPlatformMisc::SetCurrentThreadName(const char* Name)
 {
     LOG_WARNING_MESSAGE_ONCE("SetCurrentThreadName is not implemented on this platform.");

Platforms/Win32/interface/Win32PlatformMisc.hpp

@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019-2025 Diligent Graphics LLC
+ *  Copyright 2019-2026 Diligent Graphics LLC
  *  Copyright 2015-2019 Egor Yusov
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
@@ -168,6 +168,13 @@ struct WindowsMisc : public BasicPlatformMisc
     /// On failure, returns 0.
     static Uint64 SetCurrentThreadAffinity(Uint64 Mask);
 
+    /// Sets the current process affinity mask.
+    /// On success, returns true. On failure, returns false and the affinity mask is not changed.
+    static Bool SetProcessAffinity(Uint64 Mask);
+
+    /// Returns the process affinity mask. On failure, returns 0.
+    static Uint64 GetProcessAffinity();
+
     static ThreadPriority GetCurrentThreadPriority();
 
     /// Sets the current thread priority and on success returns the previous priority.

Platforms/Win32/src/Win32PlatformMisc.cpp

@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019-2025 Diligent Graphics LLC
+ *  Copyright 2019-2026 Diligent Graphics LLC
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -43,6 +43,22 @@ Uint64 WindowsMisc::SetCurrentThreadAffinity(Uint64 Mask)
     return SetThreadAffinityMask(hCurrThread, static_cast<DWORD_PTR>(Mask));
 }
 
+Bool WindowsMisc::SetProcessAffinity(Uint64 Mask)
+{
+    const HANDLE hCurrProcess = GetCurrentProcess();
+    return SetProcessAffinityMask(hCurrProcess, static_cast<DWORD_PTR>(Mask)) != 0;
+}
+
+Uint64 WindowsMisc::GetProcessAffinity()
+{
+    DWORD_PTR    ProcessAffinityMask = 0;
+    DWORD_PTR    SystemAffinityMask  = 0;
+    const HANDLE hCurrProcess        = GetCurrentProcess();
+    if (GetProcessAffinityMask(hCurrProcess, &ProcessAffinityMask, &SystemAffinityMask))
+        return static_cast<Uint64>(ProcessAffinityMask);
+    else
+        return 0;
+}
 
 static ThreadPriority WndPriorityToThreadPiority(int priority)
 {