[SERVICES] Implement ScmGenerateServiceTag and call it on service creation

[reactos.git] / base / system / services / database.c

diff --git a/base/system/services/database.c b/base/system/services/database.c
index be6290b..26172a7 100644 (file)
--- a/base/system/services/database.c
+++ b/base/system/services/database.c
@@ -31,6 +31,7 @@ LIST_ENTRY ServiceListHead;
 static RTL_RESOURCE DatabaseLock;
 static DWORD ResumeCount = 1;
 static DWORD NoInteractiveServices = 0;
+static DWORD ServiceTag = 0;
 
 /* The critical section synchronizes service control requests */
 static CRITICAL_SECTION ControlServiceCriticalSection;
@@ -634,6 +635,29 @@ ScmGetServiceEntryByResumeCount(DWORD dwResumeCount)
 }
 
 
+DWORD
+ScmGenerateServiceTag(PSERVICE lpServiceRecord)
+{
+    /* Check for an overflow */
+    if (ServiceTag == -1)
+    {
+        return ERROR_INVALID_DATA;
+    }
+
+    /* This is only valid for Win32 services */
+    if (!(lpServiceRecord->Status.dwServiceType & SERVICE_WIN32))
+    {
+        return ERROR_INVALID_PARAMETER;
+    }
+
+    /* Increment the tag counter and set it */
+    ServiceTag = ServiceTag % 0xFFFFFFFF + 1;
+    lpServiceRecord->dwTag = ServiceTag;
+
+    return ERROR_SUCCESS;
+}
+
+
 DWORD
 ScmCreateNewServiceRecord(LPCWSTR lpServiceName,
                           PSERVICE *lpServiceRecord,
@@ -847,6 +871,8 @@ CreateServiceListEntry(LPCWSTR lpServiceName,
 
     if (ScmIsDeleteFlagSet(hServiceKey))
         lpService->bDeleted = TRUE;
+    else
+        ScmGenerateServiceTag(lpService);
 
     if (lpService->Status.dwServiceType & SERVICE_WIN32)
     {