1 files changed, 43 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/free.c b/cpukit/libcsupport/src/free.c
index f4542e0c72..9f7c577852 100644
--- a/cpukit/libcsupport/src/free.c
+++ b/cpukit/libcsupport/src/free.c
@@ -23,6 +23,49 @@
 #include "malloc_p.h"
 #include <stdlib.h>
 
+#include <rtems/chain.h>
+
+static RTEMS_CHAIN_DEFINE_EMPTY( _Malloc_GC_list );
+
+RTEMS_INTERRUPT_LOCK_DEFINE( static, _Malloc_GC_lock, "Malloc GC" )
+
+static void *_Malloc_Get_deferred_free( void )
+{
+  rtems_interrupt_lock_context lock_context;
+  void *p;
+
+  rtems_interrupt_lock_acquire( &_Malloc_GC_lock, &lock_context );
+  p = rtems_chain_get_unprotected( &_Malloc_GC_list );
+  rtems_interrupt_lock_release( &_Malloc_GC_lock, &lock_context );
+
+  return p;
+}
+
+void _Malloc_Process_deferred_frees( void )
+{
+  rtems_chain_node *to_be_freed;
+
+  /*
+   *  If some free's have been deferred, then do them now.
+   */
+  while ( ( to_be_freed = _Malloc_Get_deferred_free() ) != NULL ) {
+    free( to_be_freed );
+  }
+}
+
+static void _Malloc_Deferred_free( void *p )
+{
+  rtems_interrupt_lock_context lock_context;
+  rtems_chain_node *node;
+
+  node = (rtems_chain_node *) p;
+
+  rtems_interrupt_lock_acquire( &_Malloc_GC_lock, &lock_context );
+  rtems_chain_initialize_node( node );
+  rtems_chain_append_unprotected( &_Malloc_GC_list, node );
+  rtems_interrupt_lock_release( &_Malloc_GC_lock, &lock_context );
+}
+
 void free(
   void *ptr
 )