117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/*
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* This file is distributed as part of the SkySQL Gateway. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright SkySQL Ab 2013
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*/
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/**
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* @file monitor.c - The monitor module management routines
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 08/07/13 Mark Riddoch Initial implementation
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*
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* @endverbatim
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <monitor.h>
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#include <spinlock.h>
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#include <modules.h>
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static MONITOR *allMonitors = NULL;
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static SPINLOCK monLock = SPINLOCK_INIT;
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/**
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* Allocate a new monitor, load the associated module for the monitor
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* and start execution on the monitor.
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*
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* @param name The name of the monitor module to load
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* @return The newly created monitor
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*/
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MONITOR *
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monitor_alloc(char *name, char *module)
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{
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MONITOR *mon;
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if ((mon = (MONITOR *)malloc(sizeof(MONITOR))) == NULL)
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{
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return NULL;
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}
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mon->name = strdup(name);
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mon->module = strdup(module);
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if ((mon->module = load_module(module, MODULE_MONITOR)) == NULL)
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{
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fprintf(stderr, "Unable to load monitor module '%s'\n", name);
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free(mon->name);
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free(mon);
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return NULL;
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}
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mon->handle = (*mon->module->startMonitor)();
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spinlock_acquire(&monLock);
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mon->next = allMonitors;
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allMonitors = mon;
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spinlock_release(&monLock);
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return mon;
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}
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/**
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* Free a monitor, first stop the monitor and then remove the monitor from
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* the chain of monitors and free the memory.
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*
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* @param mon The monitor to free
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*/
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void
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monitor_free(MONITOR *mon)
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{
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MONITOR *ptr;
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mon->module->stopMonitor(mon->handle);
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spinlock_acquire(&monLock);
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if (allMonitors == mon)
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allMonitors = mon->next;
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else
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{
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ptr = allMonitors;
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while (ptr->next && ptr->next != mon)
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ptr = ptr->next;
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if (ptr->next)
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ptr->next = mon->next;
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}
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spinlock_release(&monLock);
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free(mon->name);
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free(mon);
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}
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/**
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* Add a server to a monitor. Simply register the server that needs to be
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* monitored to the running monitor module.
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*
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* @param mon The Monitor instance
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* @param server The Server to add to the monitoring
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*/
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void
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monitorAddServer(MONITOR *mon, SERVER *server)
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{
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mon->module->registerServer(mon->handle, server);
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}
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