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Diffstat (limited to 'odb/mysql/auto-handle.hxx')
-rw-r--r-- | odb/mysql/auto-handle.hxx | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/odb/mysql/auto-handle.hxx b/odb/mysql/auto-handle.hxx new file mode 100644 index 0000000..6950551 --- /dev/null +++ b/odb/mysql/auto-handle.hxx @@ -0,0 +1,96 @@ +// file : odb/mysql/auto-handle.hxx +// author : Constantin Michael <constantin@codesynthesis.com> +// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC +// license : GNU GPL v2; see accompanying LICENSE file + +#ifndef ODB_MYSQL_AUTO_HANDLE_HXX +#define ODB_MYSQL_AUTO_HANDLE_HXX + +#include <odb/pre.hxx> + +#include <odb/mysql/version.hxx> +#include <odb/mysql/mysql.hxx> + +namespace odb +{ + namespace mysql + { + template <typename H> + struct handle_traits; + + template <> + struct handle_traits<MYSQL> + { + static void + release (MYSQL* h) + { + mysql_close (h); + } + }; + + template <> + struct handle_traits<MYSQL_STMT> + { + static void + release (MYSQL_STMT* h) + { + mysql_stmt_close (h); + } + }; + + template <typename H> + class auto_handle + { + public: + auto_handle (H* h = 0) + : h_ (h) + { + } + + ~auto_handle () + { + if (h_ != 0) + handle_traits<H>::release (h_); + } + + H* + get () const + { + return h_; + } + + void + reset (H* h = 0) + { + if (h_ != 0) + handle_traits<H>::release (h_); + + h_ = h; + } + + H* + release () + { + H* h (h_); + h_ = 0; + return h; + } + + operator H* () + { + return h_; + } + + private: + auto_handle (const auto_handle&); + auto_handle& operator= (const auto_handle&); + + private: + H* h_; + }; + } +} + +#include <odb/post.hxx> + +#endif // ODB_MYSQL_AUTO_HANDLE_HXX |