[PATCH v20 4/6] msvcr100: Add reference counting to thread contexts.

[Torge Matthies]

From: Torge Matthies

Signed-off-by: Torge Matthies 
---
 dlls/msvcrt/concurrency.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/dlls/msvcrt/concurrency.c b/dlls/msvcrt/concurrency.c
index f8abdff9f5d..8c69c62fa3e 100644
--- a/dlls/msvcrt/concurrency.c
+++ b/dlls/msvcrt/concurrency.c
@@ -91,12 +91,14 @@ struct scheduler_list {

typedef struct {
     Context context;
+    LONG ref;
     struct scheduler_list scheduler;
     unsigned int id;
     union allocator_cache_entry *allocator_cache[8];
 } ExternalContextBase;
 extern const vtable_ptr ExternalContextBase_vtable;
 static void ExternalContextBase_ctor(ExternalContextBase*);
+static void ExternalContextBase_dtor(ExternalContextBase*);

typedef struct Scheduler {
     const vtable_ptr *vtable;
@@ -890,6 +892,7 @@ static void ExternalContextBase_ctor(ExternalContextBase *this)

memset(this, 0, sizeof(*this));
     this->context.vtable = &ExternalContextBase_vtable;
+    this->ref = 1;
     this->id = InterlockedIncrement(&context_id);

create_default_scheduler();
@@ -3129,9 +3132,11 @@ void msvcrt_free_concurrency(void)

void msvcrt_free_scheduler_thread(void)
 {
-    Context *context = try_get_current_context();
+    ExternalContextBase *context = (ExternalContextBase*)try_get_current_context();
     if (!context) return;
-    call_Context_dtor(context, 1);
+    if (context->context.vtable != &ExternalContextBase_vtable ||
+        InterlockedDecrement(&context->ref) == 0)
+        call_Context_dtor(context, 1);
 }

#endif /* _MSVCR_VER >= 100 */