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/** @file
A brief file description
@section license License
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/****************************************************************************
ProxyConfig.h
****************************************************************************/
#ifndef _Proxy_Config_h
#define _Proxy_Config_h
#include "ts/ink_platform.h"
#include "ts/ink_memory.h"
#include "ProcessManager.h"
#include "I_EventSystem.h"
class ProxyMutex;
void *config_int_cb(void *data, void *value);
void *config_long_long_cb(void *data, void *value);
void *config_float_cb(void *data, void *value);
void *config_string511_cb(void *data, void *value);
void *config_string_alloc_cb(void *data, void *value);
// Configuration file flags shared by proxy configuration and mgmt.
#define CONFIG_FLAG_NONE 0u
#define CONFIG_FLAG_UNVERSIONED 1u // Don't version this config file
//
// Macros that spin waiting for the data to be bound
//
#define SignalManager(_n, _d) pmgmt->signalManager(_n, (char *)_d)
#define SignalWarning(_n, _s) \
{ \
Warning("%s", _s); \
SignalManager(_n, _s); \
}
#define RegisterMgmtCallback(_signal, _fn, _data) pmgmt->registerMgmtCallback(_signal, _fn, _data)
#define MAX_CONFIGS 100
typedef RefCountObj ConfigInfo;
class ConfigProcessor
{
public:
ConfigProcessor();
enum {
// The number of seconds to wait before garbage collecting stale ConfigInfo objects. There's
// no good reason to tune this, outside of regression tests, so don't.
CONFIG_PROCESSOR_RELEASE_SECS = 60
};
template <typename ClassType, typename ConfigType> struct scoped_config {
scoped_config() : ptr(ClassType::acquire()) {}
~scoped_config() { ClassType::release(ptr); }
operator bool() const { return ptr != 0; }
operator const ConfigType *() const { return ptr; }
const ConfigType *operator->() const { return ptr; }
private:
ConfigType *ptr;
};
unsigned int set(unsigned int id, ConfigInfo *info, unsigned timeout_secs = CONFIG_PROCESSOR_RELEASE_SECS);
ConfigInfo *get(unsigned int id);
void release(unsigned int id, ConfigInfo *data);
public:
ConfigInfo *infos[MAX_CONFIGS];
int ninfos;
};
// A Continuation wrapper that calls the static reconfigure() method of the given class.
template <typename UpdateClass> struct ConfigUpdateContinuation : public Continuation {
int
update(int /* etype */, void * /* data */)
{
UpdateClass::reconfigure();
delete this;
return EVENT_DONE;
}
ConfigUpdateContinuation(Ptr<ProxyMutex> &m) : Continuation(m.get()) { SET_HANDLER(&ConfigUpdateContinuation::update); }
};
template <typename UpdateClass>
int
ConfigScheduleUpdate(Ptr<ProxyMutex> &mutex)
{
eventProcessor.schedule_imm(new ConfigUpdateContinuation<UpdateClass>(mutex), ET_CALL);
return 0;
}
template <typename UpdateClass> struct ConfigUpdateHandler {
ConfigUpdateHandler() : mutex(new_ProxyMutex()) {}
~ConfigUpdateHandler() { mutex->free(); }
int
attach(const char *name)
{
return REC_RegisterConfigUpdateFunc(name, ConfigUpdateHandler::update, this);
}
private:
static int
update(const char *name, RecDataT /* data_type ATS_UNUSED */, RecData /* data ATS_UNUSED */, void *cookie)
{
ConfigUpdateHandler *self = static_cast<ConfigUpdateHandler *>(cookie);
Debug("config", "%s(%s)", __PRETTY_FUNCTION__, name);
return ConfigScheduleUpdate<UpdateClass>(self->mutex);
}
Ptr<ProxyMutex> mutex;
};
extern ConfigProcessor configProcessor;
#endif