New API standalone functions to acquire and release the allocator lock

Issue #282 (bdwgc).

Public GC_alloc_lock() and GC_alloc_unlock() are introduced to simplify
dealing with the GC lock compared to GC_call_with_alloc_lock().

* include/gc.h [GC_THREADS] (GC_alloc_lock, GC_alloc_unlock): Declare
new API function.
* include/gc.h [!GC_THREADS] (GC_alloc_lock, GC_alloc_unlock): Define
as a no-op macro.
* misc.c [THREADS] (GC_alloc_lock, GC_alloc_unlock): Define API
function.
* tests/test.c (reachable_objs_count_enumerator): Remove function.
* tests/test.c (check_heap_stats): Call GC_alloc_lock(); call
GC_enumerate_reachable_objects_inner() directly; call GC_alloc_unlock().

1 files changed, 12 insertions, 0 deletions

diff --git a/misc.c b/misc.c
index 322422fb..15570ca8 100644
--- a/misc.c
+++ b/misc.c
@@ -2310,6 +2310,18 @@ GC_API GC_word GC_CALL GC_get_gc_no(void)
     return GC_parallel;
   }
 
+  GC_API void GC_CALL GC_alloc_lock(void)
+  {
+    DCL_LOCK_STATE;
+    LOCK();
+  }
+
+  GC_API void GC_CALL GC_alloc_unlock(void)
+  {
+    /* no DCL_LOCK_STATE */
+    UNLOCK();
+  }
+
   GC_INNER GC_on_thread_event_proc GC_on_thread_event = 0;
 
   GC_API void GC_CALL GC_set_on_thread_event(GC_on_thread_event_proc fn)