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84 lines
3.1 KiB
C++
84 lines
3.1 KiB
C++
/* logsource.cpp: Interface of global logger to object instances.
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Copyright (c) 2018, Joerg Hoppe
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j_hoppe@t-online.de, www.retrocmp.com
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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JOERG HOPPE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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12-nov-2018 JH entered beta phase
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Every object has an own logger-label and an own log_level variable
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Usage:
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- An object which wants to log must inherit from logsource_c.
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- In its constructor, it must set log_label_ptr and log_level_ptr pointers
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to its own variables.
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- Messages are generated with FATAL(), ERROR(), ... DEBUG() message macros.
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- each object.log_level is initialized by logger.default_level
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*/
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#ifndef _LOGSOURCE_HPP_
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#define _LOGSOURCE_HPP_
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#include <string>
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class logsource_c {
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private:
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// default vars for logsources without own variables
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unsigned log_level ; // filters which messages to display in the global logger.
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// register/unregister at global logger
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// called in constructor/destructor
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void connect() ;
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void disconnect() ;
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public:
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logsource_c() ;
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~logsource_c() ;
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// surrounding object can use own variables
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std::string log_label ; // short string to show source in print outs
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// std::string *log_label_ptr ; // ref to "label variable" of surrounding object instance
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unsigned log_id ; // unique numeric id, assigned by global logger
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// the logger keeps a list of known logsources[]
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// access loglevel indirect, because its a device parameter
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unsigned *log_level_ptr ; // ref to "level" variable of surrounding object instance
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// level determines which log() message are to be output
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// fatal, error, warning, info, debug
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} ;
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// macros to be used in surrounding class code
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// (must be macros, because of __FILE__/__LINE__ )
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#define FATAL(...) \
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logger->log(this, LL_FATAL, __FILE__, __LINE__, __VA_ARGS__)
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#define ERROR(...) \
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logger->log(this, LL_ERROR, __FILE__, __LINE__, __VA_ARGS__)
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#define WARNING(...) \
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logger->log(this, LL_WARNING, __FILE__, __LINE__, __VA_ARGS__)
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#define INFO(...) \
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logger->log(this, LL_INFO, __FILE__, __LINE__, __VA_ARGS__)
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#define DEBUG(...) \
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logger->log(this, LL_DEBUG, __FILE__, __LINE__, __VA_ARGS__)
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// disables a DEBUG
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#define _DEBUG(...)
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#endif // _LOGSOURCE_HPP_
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