OZ++ Class: TimerDescriptor |
/****************************************************************************** * * Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer. * * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * * TimerDescriptor.h * *****************************************************************************/ //2015/06/01 Modified to use Callback class. #pragma once #include <oz++/CommonObject.h> #include <oz++/FileDescriptor.h> #include <oz++/UnsignedInteger64.h> #include <oz++/ITimerSpec.h> #include <oz++/Callback.h> #include <oz++/Exception.h> #include <sys/timerfd.h> #include <sys/time.h> namespace OZ { //Elapsed callback typedef void (CommonObject::*Elapsed)(uint64_t value); class TimerDescriptor :public FileDescriptor { private: //Callback which can be called from read method. Callback<CommonObject*, Elapsed, uint64_t> callback; public: TimerDescriptor(int clockid, int flags) :FileDescriptor() { int fd = timerfd_create(clockid, flags); if (fd == INVALID_FD) { throw IException("Failed timerfd_create :%s", ERROR_STRING); } setFD(fd); } int setTime(int flags, ITimerSpec& new_value) { struct itimerspec its = new_value.get(); return timerfd_settime(getFD(), flags, &its, NULL); } int setTime(int flags, const struct itimerspec& new_value) { return timerfd_settime(getFD(), flags, &new_value, NULL); } int setTime(int flags, const struct itimerspec& new_value, struct itimerspec& curr_value) { return timerfd_settime(getFD(), flags, &new_value, &curr_value); } int getTime(struct itimerspec& curr_value) { return timerfd_gettime(getFD(), &curr_value); } void setCallback(CommonObject* object, Elapsed elapsed) { callback.set(object, elapsed); } void callCallback(uint64_t& value) { callback.call(value); } ssize_t read(uint64_t& value) { ssize_t size = FileDescriptor::read((void*)&value, sizeof(value)); if (size != sizeof(value)) { throw IException("Failed to read: %s", ERROR_STRING); } callCallback(value); return size; } ssize_t write(uint64_t& value) { ssize_t size = FileDescriptor::write((void*)&value, sizeof(value)); if (size != sizeof(value)) { throw IException("Failed to write: %s", ERROR_STRING); } return size; } }; }