112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
/*
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Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef NDB_COMPONENT_H
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#define NDB_COMPONENT_H
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#include <my_global.h>
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#include <thr_cond.h>
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#include <thr_mutex.h>
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extern "C" void * Ndb_component_run_C(void *);
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/**
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* Baseclass encapsulating the different components
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* in ndbcluster.
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*
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* NOTE! The intention should be to not correlate to number of
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* threads since that is an implementation detail in each
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* component.
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*/
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class Ndb_component
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{
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public:
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virtual int init();
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virtual int start();
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virtual int stop();
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virtual int deinit();
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protected:
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/**
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* Con/de-structor is protected...so that sub-class needs to provide own
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*/
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Ndb_component(const char* name);
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virtual ~Ndb_component();
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/**
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* Component init function
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*/
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virtual int do_init() = 0;
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/**
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* Component run function
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*/
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virtual void do_run() = 0;
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/**
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* Component deinit function
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*/
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virtual int do_deinit() = 0;
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/**
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* Component wakeup function
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* - called when component is set to stop, should
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* wakeup component from waiting
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*/
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virtual void do_wakeup() = 0;
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/**
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* For usage in threads main loop
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*/
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bool is_stop_requested();
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protected:
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void log_verbose(unsigned verbose_level, const char* fmt, ...)
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MY_ATTRIBUTE((format(printf, 3, 4)));
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void log_error(const char *fmt, ...)
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MY_ATTRIBUTE((format(printf, 2, 3)));
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void log_warning(const char *fmt, ...)
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MY_ATTRIBUTE((format(printf, 2, 3)));
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void log_info(const char *fmt, ...)
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MY_ATTRIBUTE((format(printf, 2, 3)));
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private:
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enum ThreadState
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{
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TS_UNINIT = 0,
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TS_INIT = 1,
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TS_STARTING = 2,
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TS_RUNNING = 3,
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TS_STOPPING = 4,
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TS_STOPPED = 5
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};
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ThreadState m_thread_state;
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my_thread_handle m_thread;
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native_mutex_t m_start_stop_mutex;
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native_cond_t m_start_stop_cond;
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const char* m_name;
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void run_impl();
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friend void * Ndb_component_run_C(void *);
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};
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#endif
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