pdh: Implement and test PdhGetDllVersion.

dlls/pdh/pdh.spec

@@ -57,7 +57,7 @@
 @ stub PdhGetDefaultPerfObjectHA
 @ stub PdhGetDefaultPerfObjectHW
 @ stub PdhGetDefaultPerfObjectW
-@ stub PdhGetDllVersion
+@ stdcall PdhGetDllVersion(ptr)
 @ stub PdhGetFormattedCounterArrayA
 @ stub PdhGetFormattedCounterArrayW
 @ stdcall PdhGetFormattedCounterValue(ptr long ptr ptr)

dlls/pdh/pdh_main.c

@@ -725,6 +725,19 @@ PDH_STATUS WINAPI PdhGetCounterTimeBase( PDH_HCOUNTER handle, LONGLONG *base )
     return ERROR_SUCCESS;
 }
 
+/***********************************************************************
+ *              PdhGetDllVersion   (PDH.@)
+ */
+PDH_STATUS WINAPI PdhGetDllVersion( LPDWORD version )
+{
+    if (!version)
+        return PDH_INVALID_ARGUMENT;
+
+    *version = PDH_VERSION;
+
+    return ERROR_SUCCESS;
+}
+
 /***********************************************************************
  *              PdhGetFormattedCounterValue   (PDH.@)
  */

dlls/pdh/tests/pdh.c

@@ -934,6 +934,28 @@ static void test_PdhMakeCounterPathA(void)
     ok(ret == PDH_INVALID_ARGUMENT, "PdhMakeCounterPathA failed 0x%08x\n", ret);
 }
 
+static void test_PdhGetDllVersion(void)
+{
+    PDH_STATUS ret;
+    DWORD version;
+
+    ret = PdhGetDllVersion(NULL);
+    ok(ret == PDH_INVALID_ARGUMENT ||
+       broken(ret == ERROR_SUCCESS), /* Vista+ */
+       "Expected PdhGetDllVersion to return PDH_INVALID_ARGUMENT, got %d\n", ret);
+
+    ret = PdhGetDllVersion(&version);
+    ok(ret == ERROR_SUCCESS,
+       "Expected PdhGetDllVersion to return ERROR_SUCCESS, got %d\n", ret);
+
+    if (ret == ERROR_SUCCESS)
+    {
+        ok(version == PDH_CVERSION_WIN50 ||
+           version == PDH_VERSION,
+           "Expected version number to be PDH_CVERSION_WIN50 or PDH_VERSION, got %u\n", version);
+    }
+}
+
 START_TEST(pdh)
 {
     if (PRIMARYLANGID(LANGIDFROMLCID(GetThreadLocale())) != LANG_ENGLISH)
@@ -975,4 +997,5 @@ START_TEST(pdh)
 
     test_PdhCollectQueryDataEx();
     test_PdhMakeCounterPathA();
+    test_PdhGetDllVersion();
 }

include/pdh.h

@@ -37,6 +37,10 @@ typedef HANDLE PDH_HQUERY;
 typedef HANDLE PDH_HCOUNTER;
 typedef HANDLE PDH_HLOG;
 
+#define PDH_CVERSION_WIN40  0x0400
+#define PDH_CVERSION_WIN50  0x0500
+#define PDH_VERSION         0x0503
+
 #define PDH_MAX_SCALE 7
 #define PDH_MIN_SCALE (-7)
 
@@ -186,6 +190,7 @@ PDH_STATUS WINAPI PdhGetCounterInfoA(PDH_HCOUNTER, BOOLEAN, LPDWORD, PPDH_COUNTE
 PDH_STATUS WINAPI PdhGetCounterInfoW(PDH_HCOUNTER, BOOLEAN, LPDWORD, PPDH_COUNTER_INFO_W);
 #define    PdhGetCounterInfo WINELIB_NAME_AW(PdhGetCounterInfo)
 PDH_STATUS WINAPI PdhGetCounterTimeBase(PDH_HCOUNTER, LONGLONG *);
+PDH_STATUS WINAPI PdhGetDllVersion(LPDWORD);
 PDH_STATUS WINAPI PdhGetFormattedCounterValue(PDH_HCOUNTER, DWORD, LPDWORD, PPDH_FMT_COUNTERVALUE);
 PDH_STATUS WINAPI PdhGetRawCounterValue(PDH_HCOUNTER, LPDWORD, PPDH_RAW_COUNTER);
 PDH_STATUS WINAPI PdhLookupPerfIndexByNameA(LPCSTR, LPCSTR, LPDWORD);