[KERNEL32_VISTA] add required functions for winhttp

Author: MishaProductions

dll/win32/kernel32/kernel32_vista/CMakeLists.txt

@@ -21,6 +21,7 @@ list(APPEND SOURCE
     LocaleNameToLCID.c
     SetThreadDescription.c
     sync.c
+    threadpool.c
     vista.c)
 
 # These functions are not exported from kernel32_vista (yet).

dll/win32/kernel32/kernel32_vista/kernel32_vista.spec

@@ -59,3 +59,5 @@
 
 @ stdcall GetNamedPipeClientProcessId(ptr ptr)
 @ stdcall SetThreadDescription(ptr wstr) # Win 10
+@ stdcall TrySubmitThreadpoolCallback(ptr ptr ptr)
+@ stdcall FreeLibraryWhenCallbackReturns(ptr ptr) ntdll.TpCallbackUnloadDllOnCompletion

dll/win32/kernel32/kernel32_vista/threadpool.c

@@ -0,0 +1,19 @@
+#include "k32_vista.h"
+
+extern BOOL WINAPI DECLSPEC_HOTPATCH TpSimpleTryPost( PTP_SIMPLE_CALLBACK callback, PVOID userdata,
+                                                           TP_CALLBACK_ENVIRON *environment );
+/***********************************************************************
+ *           TrySubmitThreadpoolCallback   (kernelbase.@)
+ */
+BOOL WINAPI DECLSPEC_HOTPATCH TrySubmitThreadpoolCallback( PTP_SIMPLE_CALLBACK callback, PVOID userdata,
+                                                           TP_CALLBACK_ENVIRON *environment )
+{
+    NTSTATUS status = TpSimpleTryPost( callback, userdata, environment );
+    if (!NT_SUCCESS(status))
+    {
+        SetLastError(RtlNtStatusToDosError(status));
+        return FALSE;
+    }
+
+    return TRUE;
+}