/** * @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)) { 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); }