855ed415f8
C++ header files have the .hh-suffix to distinguish them from C
header files, but also to allow a C++ header file (e.g. xyz.hh) for
an existing C header file (e.g. xyz.h).
- cpp.hh : Basic C++ stuff. Introduces the namespace "maxscale"
and its synonym "mxs".
- filter.[hh|cc]: Template class Filter and companion class FilterSession
to be used when implementing filters in C++.
- spinlock.h : Wrapper and lock guard class for SPINLOCK.
66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
#pragma once
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file cpp.hh
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*
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* Common stuff for C++ code.
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*/
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#if !defined(__cplusplus)
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#error This file is only to be included by C++ code.
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#endif
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#include <maxscale/cdefs.h>
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#include <exception>
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#include <new>
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#include <maxscale/log_manager.h>
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/**
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* All classes of MaxScale are defined in the namespace @c maxscale.
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*
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* Third party plugins should not place any definitions inside the namespace
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* to avoid any name clashes in the future. An exception are template
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* specializations.
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*/
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namespace maxscale
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{
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}
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/**
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* Shorthand for the @c maxscale namespace.
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*/
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namespace mxs = maxscale;
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/**
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* If a statement is placed inside this macro, then no exceptions will
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* escape. Typical use-case is for preventing exceptions to escape across
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* a C-API.
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*
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* @code{.cpp}
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*
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* void* cAPI()
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* {
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* void* rv = NULL;
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* MXS_EXCEPTION_GUARD(rv = new Something);
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* return rv;
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* }
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* @endcode
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*/
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#define MXS_EXCEPTION_GUARD(statement)\
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do { try { statement; }\
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catch (const std::bad_alloc&) { MXS_OOM(); }\
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catch (const std::exception& x) { MXS_ERROR("Caught standard exception: %s", x.what()); }\
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catch (...) { MXS_ERROR("Caught unknown exception."); } } while (false)
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