[PATCH v3 4/4] localspl: Unload monitor in DeleteMonitor.

[Dmitry Timoshkov]

Some print monitors are very sensitive to loads/unloads being done
in a quick succession like AddMonitor() does, and that even leads to
crashes because the monitor I have here creates a thread on load and
when the thread starts - the monitor dll is already unloaded.
A solution to this is moving the monitor unloading to DeleteMonitor.

Signed-off-by: Dmitry Timoshkov 
---
 dlls/localspl/provider.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/dlls/localspl/provider.c b/dlls/localspl/provider.c
index 0e602ff701..3da71525d1 100644
--- a/dlls/localspl/provider.c
+++ b/dlls/localspl/provider.c
@@ -1560,8 +1560,6 @@ static BOOL WINAPI fpAddMonitor(LPWSTR pName, DWORD Level, LPBYTE pMonitors)
         if ((pm = monitor_load(mi2w->pName, mi2w->pDLLName)) == NULL)
             res = FALSE;

-        monitor_unload(pm);
-
         RegCloseKey(hentry);

if (!res)
@@ -1862,6 +1860,7 @@ static BOOL WINAPI fpConfigurePort(LPWSTR pName, HWND hWnd, LPWSTR pPortName)

static BOOL WINAPI fpDeleteMonitor(LPWSTR pName, LPWSTR pEnvironment, LPWSTR pMonitorName)
 {
+    monitor_t *pm;
     HKEY    hroot = NULL;
     LONG    lres;

@@ -1882,6 +1881,18 @@ static BOOL WINAPI fpDeleteMonitor(LPWSTR pName, LPWSTR pEnvironment, LPWSTR pMo
         return FALSE;
     }

+    /* Unload the monitor if it's loaded */
+    EnterCriticalSection(&monitor_handles_cs);
+    LIST_FOR_EACH_ENTRY(pm, &monitor_handles, monitor_t, entry)
+    {
+        if (pm->name && !lstrcmpW(pMonitorName, pm->name))
+        {
+            monitor_unload(pm);
+            break;
+        }
+    }
+    LeaveCriticalSection(&monitor_handles_cs);
+
     if(RegCreateKeyW(HKEY_LOCAL_MACHINE, monitorsW, &hroot) != ERROR_SUCCESS) {
         ERR("unable to create key %s\n", debugstr_w(monitorsW));
         return FALSE;