hint parameter added to zmq_free function

bindings/c/zmq.h

@@ -106,12 +106,12 @@ typedef struct
     unsigned char vsm_data [ZMQ_MAX_VSM_SIZE];
 } zmq_msg_t;
 
-typedef void (zmq_free_fn) (void *data);
+typedef void (zmq_free_fn) (void *data, void *hint);
 
 ZMQ_EXPORT int zmq_msg_init (zmq_msg_t *msg);
 ZMQ_EXPORT int zmq_msg_init_size (zmq_msg_t *msg, size_t size);
 ZMQ_EXPORT int zmq_msg_init_data (zmq_msg_t *msg, void *data,
-    size_t size, zmq_free_fn *ffn);
+    size_t size, zmq_free_fn *ffn, void *hint);
 ZMQ_EXPORT int zmq_msg_close (zmq_msg_t *msg);
 ZMQ_EXPORT int zmq_msg_move (zmq_msg_t *dest, zmq_msg_t *src);
 ZMQ_EXPORT int zmq_msg_copy (zmq_msg_t *dest, zmq_msg_t *src);

bindings/cpp/zmq.hpp

@@ -74,9 +74,10 @@ namespace zmq
                 throw error_t ();
         }
 
-        inline message_t (void *data_, size_t size_, free_fn *ffn_)
+        inline message_t (void *data_, size_t size_, free_fn *ffn_,
+            void *hint_ = NULL)
         {
-            int rc = zmq_msg_init_data (this, data_, size_, ffn_);
+            int rc = zmq_msg_init_data (this, data_, size_, ffn_, hint_);
             if (rc != 0)
                 throw error_t ();
         }
@@ -108,12 +109,13 @@ namespace zmq
                 throw error_t ();
         }
 
-        inline void rebuild (void *data_, size_t size_, free_fn *ffn_)
+        inline void rebuild (void *data_, size_t size_, free_fn *ffn_,
+            void *hint_ = NULL)
         {
             int rc = zmq_msg_close (this);
             if (rc != 0)
                 throw error_t ();
-            rc = zmq_msg_init_data (this, data_, size_, ffn_);
+            rc = zmq_msg_init_data (this, data_, size_, ffn_, hint_);
             if (rc != 0)
                 throw error_t ();
         }

src/msg_content.hpp

@@ -42,6 +42,7 @@ namespace zmq
         void *data;
         size_t size;
         zmq_free_fn *ffn;
+        void *hint;
         zmq::atomic_counter_t refcnt;
     };
 

src/zmq.cpp

@@ -103,13 +103,14 @@ int zmq_msg_init_size (zmq_msg_t *msg_, size_t size_)
         content->data = (void*) (content + 1);
         content->size = size_;
         content->ffn = NULL;
+        content->hint = NULL;
         new (&content->refcnt) zmq::atomic_counter_t ();
     }
     return 0;
 }
 
 int zmq_msg_init_data (zmq_msg_t *msg_, void *data_, size_t size_,
-    zmq_free_fn *ffn_)
+    zmq_free_fn *ffn_, void *hint_)
 {
     msg_->shared = 0;
     msg_->content = (zmq::msg_content_t*) malloc (sizeof (zmq::msg_content_t));
@@ -118,6 +119,7 @@ int zmq_msg_init_data (zmq_msg_t *msg_, void *data_, size_t size_,
     content->data = data_;
     content->size = size_;
     content->ffn = ffn_;
+    content->hint = hint_;
     new (&content->refcnt) zmq::atomic_counter_t ();
     return 0;
 }
@@ -139,7 +141,7 @@ int zmq_msg_close (zmq_msg_t *msg_)
         content->refcnt.~atomic_counter_t ();
 
         if (content->ffn)
-            content->ffn (content->data);
+            content->ffn (content->data, content->hint);
         free (content);
     }