add methods to extract memory usage

1 files changed, 7 insertions, 0 deletions

diff --git a/vespalib/src/vespa/vespalib/stllike/string.h b/vespalib/src/vespa/vespalib/stllike/string.h
index aa1e3677532..121a243d403 100644
--- a/vespalib/src/vespa/vespalib/stllike/string.h
+++ b/vespalib/src/vespa/vespalib/stllike/string.h
@@ -528,6 +528,13 @@ public:
     void reserve(size_type newCapacity) {
         reserveBytes(newCapacity + 1);
     }
+
+    size_t count_allocated_memory() const {
+        return sizeof(small_string) + isAllocated() ? _bufferSize : 0;
+    }
+    size_t count_used_memory() const {
+        return sizeof(small_string) - StackSize + size();
+    }
 private:
     void assign_slower(const void * s, size_type sz) __attribute((noinline));
     void init_slower(const void *s) noexcept __attribute((noinline));