From da9915746219482c25b96406d475c6fde9b02a31 Mon Sep 17 00:00:00 2001
From: Lee Clagett <code@leeclagett.com>
Date: Sun, 17 Nov 2019 06:06:10 +0000
Subject: Use byte_slice for sending zmq messages - removes data copy within
 zmq

---
 contrib/epee/src/byte_slice.cpp | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'contrib/epee/src/byte_slice.cpp')

diff --git a/contrib/epee/src/byte_slice.cpp b/contrib/epee/src/byte_slice.cpp
index 216049e5b..3ad3b3e7e 100644
--- a/contrib/epee/src/byte_slice.cpp
+++ b/contrib/epee/src/byte_slice.cpp
@@ -49,12 +49,16 @@ namespace epee
     std::atomic<std::size_t> ref_count;
   };
 
-  void release_byte_slice::operator()(byte_slice_data* ptr) const noexcept
+  void release_byte_slice::call(void*, void* ptr) noexcept
   {
-    if (ptr && --(ptr->ref_count) == 0)
+    if (ptr)
     {
-      ptr->~byte_slice_data();
-      free(ptr);
+      byte_slice_data* self = static_cast<byte_slice_data*>(ptr);
+      if (--(self->ref_count) == 0)
+      {
+        self->~byte_slice_data();
+        free(self);
+      }
     }
   }
 
@@ -206,4 +210,11 @@ namespace epee
       return {};
     return {storage_.get(), {portion_.begin() + begin, end - begin}};
   }
+
+  std::unique_ptr<byte_slice_data, release_byte_slice> byte_slice::take_buffer() noexcept
+  {
+    std::unique_ptr<byte_slice_data, release_byte_slice> out{std::move(storage_)};
+    portion_ = nullptr;
+    return out;
+  }
 } // epee
-- 
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