X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2FMoof%2FTimer.cc;h=3e42818962d5df7e124f7edc96ed4384ca3dc171;hp=4eea488ad7f43d29af7280f63ea3371f2380f4b2;hb=2f239b9ba2a556a5ca810cfffc60552a56a4fe86;hpb=c2321281bf12a7efaedde930422c7ddbc92080d4 diff --git a/src/Moof/Timer.cc b/src/Moof/Timer.cc index 4eea488..3e42818 100644 --- a/src/Moof/Timer.cc +++ b/src/Moof/Timer.cc @@ -1,35 +1,21 @@ -/******************************************************************************* - - Copyright (c) 2009, Charles McGarvey - All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE - FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -*******************************************************************************/ +/*] Copyright (c) 2009-2010, Charles McGarvey [************************** +**] All rights reserved. +* +* vi:ts=4 sw=4 tw=75 +* +* Distributable under the terms and conditions of the 2-clause BSD license; +* see the file COPYING for a complete text of the license. +* +**************************************************************************/ #include #include -#include +#include +#include + +#include "Log.hh" #include "Timer.hh" #if HAVE_CONFIG_H @@ -40,68 +26,175 @@ namespace Mf { -#if HAVE_CLOCK_GETTIME +Scalar Timer::gNextFire = std::numeric_limits::max(); +std::map Timer::gTimers; -// Since the monotonic clock will provide us with the timer since the computer -// started, the number of seconds since that time could easily become so large -// that it cannot be accurately stored in a float (even with as little two days -// uptime), therefore we need to start from a more recent reference (when the -// program starts). Of course this isn't much of an issue if scalar is a -// double-precision number. -static time_t setReference_() +unsigned Timer::getNewID() { - struct timespec ts; + static unsigned id = 1; + return id++; +} - if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) + +void Timer::init(const Function& function, Scalar seconds, Mode mode) +{ + invalidate(); + + mMode = mode; + + if (mMode != INVALID) { - return 0; + mFunction = function; + + if (mode == ACTUAL) + { + mAbsolute = seconds; + } + else + { + mAbsolute = seconds - getTicks(); + mInterval = seconds; + } + + mId = getNewID(); + gTimers.insert(std::pair(mId, this)); + + if (mAbsolute < gNextFire) gNextFire = mAbsolute; } +} - return ts.tv_sec; + +bool Timer::isValid() const +{ + return mMode != INVALID; } -static const time_t reference = setReference_(); +void Timer::invalidate() +{ + if (mMode != INVALID) + { + gTimers.erase(mId); + mMode = INVALID; + if (isEqual(mAbsolute, gNextFire)) gNextFire = findNextFire(); + } +} -Scalar getTicks() + +void Timer::fire() { - struct timespec ts; + Scalar t = getTicks(); - if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) + if (mFunction) mFunction(*this, t); + + if (isRepeating()) + { + Scalar absolute = mAbsolute; + + if (isEqual(mAbsolute, t, 1.0)) mAbsolute += mInterval; + else mAbsolute = mInterval + t; + + if (isEqual(absolute, gNextFire)) gNextFire = findNextFire(); + } + else { - throw std::runtime_error("cannot access monotonic clock"); + invalidate(); } +} + + +Scalar Timer::findNextFire() +{ + std::map::iterator it; + Scalar nextFire = std::numeric_limits::max(); - return Scalar(ts.tv_sec - reference) + Scalar(ts.tv_nsec) / 1000000000.0; + for (it = gTimers.begin(); it != gTimers.end(); ++it) + { + Scalar absolute = (*it).second->mAbsolute; + if (absolute < nextFire) nextFire = absolute; + } + + return nextFire; } -#else // ! HAVE_CLOCK_GETTIME +Scalar Timer::getSecondsRemaining() const +{ + return mAbsolute - getTicks(); +} +bool Timer::isExpired() const +{ + return getSecondsRemaining() < 0.0; +} -// If we don't have posix timers, we'll have to use a different timing method. -// SDL only promises centisecond accuracy, but that's better than a kick in the -// butt. +bool Timer::isRepeating() const +{ + return mMode == REPEAT; +} -#include -Scalar getTicks() +void Timer::fireIfExpired() { - Uint32 ms = SDL_GetTicks(); - return Scalar(ms / 1000) + Scalar(ms % 1000) / 1000.0; + fireIfExpired(getTicks()); } +void Timer::fireIfExpired(Scalar t) +{ + std::map::iterator it; -#endif // HAVE_CLOCK_GETTIME + if (gNextFire > t) return; + + for (it = gTimers.begin(); it != gTimers.end(); ++it) + { + Timer* timer = (*it).second; + if (timer->isExpired()) timer->fire(); + } +} + + +#if HAVE_CLOCK_GETTIME + +// Since the monotonic clock will provide us with the time since the +// computer started, the number of seconds since that time could easily +// become so large that it cannot be accurately stored in a float (even +// with as little two days uptime), therefore we need to start from a more +// recent reference (when the program starts). Of course this isn't much +// of an issue if scalar is a double-precision number. + +static time_t setReference_() +{ + struct timespec ts; + + if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) + { + return 0; + } + + return ts.tv_sec; +} + +static const time_t reference = setReference_(); + + +Scalar Timer::getTicks() +{ + struct timespec ts; + + int result = clock_gettime(CLOCK_MONOTONIC, &ts); + ASSERT(result == 0 && "cannot access clock"); + return Scalar(ts.tv_sec - reference) + + Scalar(ts.tv_nsec) / 1000000000.0; +} -void sleep(Scalar seconds, bool absolute) +void Timer::sleep(Scalar seconds, Mode mode) { struct timespec ts; int ret; - if (absolute) seconds -= getTicks(); + if (mode == ACTUAL) seconds -= getTicks(); ts.tv_sec = time_t(seconds); ts.tv_nsec = long((seconds - Scalar(ts.tv_sec)) * 1000000000.0); @@ -113,7 +206,27 @@ void sleep(Scalar seconds, bool absolute) } -} // namespace Mf +#else // ! HAVE_CLOCK_GETTIME -/** vim: set ts=4 sw=4 tw=80: *************************************************/ + +// If we don't have posix timers, we'll have to use a different timing +// method. SDL only promises centisecond accuracy, but that's better than +// a kick in the pants. + +Scalar Timer::getTicks() +{ + Uint32 ms = SDL_GetTicks(); + return Scalar(ms / 1000) + Scalar(ms % 1000) / 1000.0; +} + +void Timer::sleep(Scalar seconds, Mode mode) +{ + if (mode == ACTUAL) seconds -= getTicks(); + SDL_Delay(Uint32(cml::clamp(int(seconds * 1000.0), 0, 1000))); +} + +#endif // HAVE_CLOCK_GETTIME + + +} // namespace Mf