[PATCH 0/1] MR7706: powrprof.dll: Partially implement PowerGetActiveScheme for SteamVR

[Robert Lippmann (＠rlippmann)]

This function is supposed to allocate memory for a GUID on success.  Applications should check the return status before trying to access this pointer, but apparently vrmonitor.exe in SteamVR isn't.

[PATCH 1/1] powrprof.dll: Partially implement PowerGetActiveScheme for SteamVR

[Robert Lippmann]

From: Robert Lippmann

---
 dlls/powrprof/powrprof.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/dlls/powrprof/powrprof.c b/dlls/powrprof/powrprof.c
index c1b71b5682e..7fa7709a4c9 100644
--- a/dlls/powrprof/powrprof.c
+++ b/dlls/powrprof/powrprof.c
@@ -287,8 +287,16 @@ BOOLEAN WINAPI WritePwrScheme(PUINT puiID, LPWSTR lpszName, LPWSTR lpszDescripti

DWORD WINAPI PowerGetActiveScheme(HKEY UserRootPowerKey, GUID **polguid)
 {
-   FIXME("(%p,%p) stub!\n", UserRootPowerKey, polguid);
-   return ERROR_CALL_NOT_IMPLEMENTED;
+    GUID dummy_guid= { 0x8c5e7f13, 0x46f4, 0x4f4b, { 0xb4, 0x6f, 0x88, 0xbb, 0xf1, 0xf1, 0x58, 0x6f } };
+    FIXME("(%p,%p) partial stub!\n", UserRootPowerKey, polguid);
+    /* Windows SDK docs say this should be freed by LocalFree() */
+    *polguid = LocalAlloc(LPTR, sizeof(GUID));
+    if (*polguid)
+    {
+       memcpy(*polguid, &dummy_guid, sizeof(GUID));
+       return ERROR_SUCCESS;
+    }
+    return ERROR_NOT_ENOUGH_MEMORY;
 }

DWORD WINAPI PowerSetActiveScheme(HKEY UserRootPowerKey, GUID *polguid)