Add API to disable incremental mode

Author: jechter

mono/metadata/boehm-gc.c

@@ -454,6 +454,19 @@ mono_gc_is_incremental()
 #endif		
 }
 
+void 
+mono_gc_set_incremental(MonoBoolean value)
+{
+#if HAVE_BDWGC_GC
+	if (GC_is_incremental_mode() == value)
+		return;
+    if (value)
+		GC_enable_incremental();
+	else
+		GC_disable_incremental();
+#endif		
+}
+
 gboolean
 mono_gc_is_gc_thread (void)
 {

mono/metadata/mono-gc.h

@@ -114,6 +114,7 @@ MONO_API int64_t mono_gc_get_max_time_slice_ns ();
 MONO_API void   mono_gc_set_max_time_slice_ns (int64_t maxTimeSlice);
 MONO_API MonoBoolean mono_gc_pending_finalizers (void);
 MONO_API MonoBoolean mono_gc_is_incremental (void);
+MONO_API void 	mono_gc_set_incremental(MonoBoolean value);
 MONO_API void     mono_gc_finalize_notify    (void);
 MONO_API int    mono_gc_invoke_finalizers (void);
 /* heap walking is only valid in the pre-stop-world event callback */

mono/metadata/null-gc.c

@@ -108,6 +108,11 @@ mono_gc_is_incremental()
     return FALSE;
 }
 
+void
+mono_gc_set_incremental(MonoBoolean value)
+{
+}
+
 gboolean
 mono_gc_is_gc_thread (void)
 {

mono/metadata/sgen-mono.c

@@ -2843,6 +2843,11 @@ mono_gc_is_incremental()
     return FALSE;
 }
 
+void
+mono_gc_set_incremental(MonoBoolean value)
+{
+}
+
 void
 mono_gc_set_max_time_slice_ns(int64_t maxTimeSlice)
 {