windows: add wrappers for LocalFree, SetThreadDescription and GetThre…

…adDescription

lib/std/os/windows.zig

@@ -1522,6 +1522,10 @@ pub fn HeapDestroy(hHeap: HANDLE) void {
     assert(kernel32.HeapDestroy(hHeap) != 0);
 }
 
+pub fn LocalFree(hMem: HLOCAL) void {
+    assert(kernel32.LocalFree(hMem) == null);
+}
+
 pub const GetFileInformationByHandleError = error{Unexpected};
 
 pub fn GetFileInformationByHandle(
@@ -1722,3 +1726,18 @@ pub fn unexpectedStatus(status: NTSTATUS) std.os.UnexpectedError {
     }
     return error.Unexpected;
 }
+
+pub fn SetThreadDescription(hThread: HANDLE, lpThreadDescription: LPCWSTR) !void {
+    if (kernel32.SetThreadDescription(hThread, lpThreadDescription) == 0) {
+        switch (kernel32.GetLastError()) {
+            else => |err| return unexpectedError(err),
+        }
+    }
+}
+pub fn GetThreadDescription(hThread: HANDLE, ppszThreadDescription: *LPWSTR) !void {
+    if (kernel32.GetThreadDescription(hThread, ppszThreadDescription) == 0) {
+        switch (kernel32.GetLastError()) {
+            else => |err| return unexpectedError(err),
+        }
+    }
+}