1 files changed, 42 insertions, 0 deletions
diff --git a/libodb/odb/details/win32/once.ixx b/libodb/odb/details/win32/once.ixx
new file mode 100644
index 0000000..1638706
--- /dev/null
+++ b/libodb/odb/details/win32/once.ixx
@@ -0,0 +1,42 @@
+// file      : odb/details/win32/once.ixx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#include <odb/details/win32/lock.hxx>
+
+namespace odb
+{
+  namespace details
+  {
+    inline void
+    win32_once (win32_once_t& o, void (*func) ())
+    {
+      win32_lock l (win32_once_cs_);
+
+      if (o == 0)
+      {
+        o = 1;
+        l.unlock ();
+        func ();
+      }
+    }
+
+    inline once::
+    once ()
+        : called_ (false)
+    {
+    }
+
+    inline void once::
+    call (void (*func) ())
+    {
+      win32_lock l (win32_once_cs_);
+
+      if (!called_)
+      {
+        called_ = true;
+        l.unlock ();
+        func ();
+      }
+    }
+  }
+}