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/**
* @file llcallbacklist.cpp
* @brief A simple list of callback functions to call.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "llcallbacklist.h"
#include "lleventtimer.h"
#include "llerrorlegacy.h"
// Globals
//
LLCallbackList gIdleCallbacks;
//
// Member functions
//
LLCallbackList::LLCallbackList()
{
// nothing
}
LLCallbackList::~LLCallbackList()
{
}
void LLCallbackList::addFunction( callback_t func, void *data)
{
if (!func)
{
return;
}
// only add one callback per func/data pair
//
if (containsFunction(func, data))
{
return;
}
callback_pair_t t(func, data);
mCallbackList.push_back(t);
}
bool LLCallbackList::containsFunction( callback_t func, void *data)
{
callback_pair_t t(func, data);
callback_list_t::iterator iter = find(func,data);
if (iter != mCallbackList.end())
{
return true;
}
else
{
return false;
}
}
bool LLCallbackList::deleteFunction( callback_t func, void *data)
{
callback_list_t::iterator iter = find(func,data);
if (iter != mCallbackList.end())
{
mCallbackList.erase(iter);
return true;
}
else
{
return false;
}
}
inline
LLCallbackList::callback_list_t::iterator
LLCallbackList::find(callback_t func, void *data)
{
callback_pair_t t(func, data);
return std::find(mCallbackList.begin(), mCallbackList.end(), t);
}
void LLCallbackList::deleteAllFunctions()
{
mCallbackList.clear();
}
void LLCallbackList::callFunctions()
{
for (callback_list_t::iterator iter = mCallbackList.begin(); iter != mCallbackList.end(); )
{
callback_list_t::iterator curiter = iter++;
curiter->first(curiter->second);
}
}
// Shim class to allow arbitrary boost::bind
// expressions to be run as one-time idle callbacks.
class OnIdleCallbackOneTime
{
public:
OnIdleCallbackOneTime(nullary_func_t callable):
mCallable(callable)
{
}
static void onIdle(void *data)
{
gIdleCallbacks.deleteFunction(onIdle, data);
OnIdleCallbackOneTime* self = reinterpret_cast<OnIdleCallbackOneTime*>(data);
self->call();
delete self;
}
void call()
{
mCallable();
}
private:
nullary_func_t mCallable;
};
void doOnIdleOneTime(nullary_func_t callable)
{
OnIdleCallbackOneTime* cb_functor = new OnIdleCallbackOneTime(callable);
gIdleCallbacks.addFunction(&OnIdleCallbackOneTime::onIdle,cb_functor);
}
// Shim class to allow generic boost functions to be run as
// recurring idle callbacks. Callable should return true when done,
// false to continue getting called.
class OnIdleCallbackRepeating
{
public:
OnIdleCallbackRepeating(bool_func_t callable):
mCallable(callable)
{
}
// Will keep getting called until the callable returns true.
static void onIdle(void *data)
{
OnIdleCallbackRepeating* self = reinterpret_cast<OnIdleCallbackRepeating*>(data);
bool done = self->call();
if (done)
{
gIdleCallbacks.deleteFunction(onIdle, data);
delete self;
}
}
bool call()
{
return mCallable();
}
private:
bool_func_t mCallable;
};
void doOnIdleRepeating(bool_func_t callable)
{
OnIdleCallbackRepeating* cb_functor = new OnIdleCallbackRepeating(callable);
gIdleCallbacks.addFunction(&OnIdleCallbackRepeating::onIdle,cb_functor);
}
class NullaryFuncEventTimer: public LLEventTimer
{
public:
NullaryFuncEventTimer(nullary_func_t callable, F32 seconds):
LLEventTimer(seconds),
mCallable(callable)
{
}
private:
bool tick()
{
mCallable();
return true;
}
nullary_func_t mCallable;
};
// Call a given callable once after specified interval.
void doAfterInterval(nullary_func_t callable, F32 seconds)
{
new NullaryFuncEventTimer(callable, seconds);
}
class BoolFuncEventTimer: public LLEventTimer
{
public:
BoolFuncEventTimer(bool_func_t callable, F32 seconds):
LLEventTimer(seconds),
mCallable(callable)
{
}
private:
bool tick()
{
return mCallable();
}
bool_func_t mCallable;
};
// Call a given callable every specified number of seconds, until it returns true.
void doPeriodically(bool_func_t callable, F32 seconds)
{
new BoolFuncEventTimer(callable, seconds);
}
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