4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief Scheduler non-inline non-template implementation
26 \idea Multithreading support: To support multithreading, the
27 static member Scheduler::instance() must return a thread-local
28 value (that is Scheduler::instance() must allocate one Scheduler
29 instance per thread). Another possibility would be to distribute
30 the async load unto several threads (one scheduler for multiple
34 #include "Scheduler.hh"
35 //#include "Scheduler.ih"
40 ///////////////////////////////cc.p////////////////////////////////////////
43 bool terminate_ (false);
44 bool running_ (false);
47 prefix_ void senf::scheduler::terminate()
52 prefix_ bool senf::scheduler::running()
57 prefix_ senf::ClockService::clock_type senf::scheduler::now()
59 return running() ? eventTime() : ClockService::now();
64 // We don't want try { } catch(...) { ... throw; } since that will make debugging more
65 // difficult: the stack backtrace for an unexpected exception would always end here.
66 struct SchedulerScopedInit
70 senf::scheduler::detail::FIFORunner::instance().startWatchdog();
71 senf::scheduler::detail::SignalDispatcher::instance().unblockSignals();
72 senf::scheduler::detail::TimerDispatcher::instance().enable();
76 ~SchedulerScopedInit()
78 senf::scheduler::detail::TimerDispatcher::instance().disable();
79 senf::scheduler::detail::SignalDispatcher::instance().blockSignals();
80 senf::scheduler::detail::FIFORunner::instance().stopWatchdog();
86 prefix_ void senf::scheduler::process()
88 SchedulerScopedInit initScheduler;
91 detail::TimerDispatcher::instance().reschedule();
92 while(! terminate_ && ! (detail::FdDispatcher::instance().empty() &&
93 detail::TimerDispatcher::instance().empty() &&
94 detail::FileDispatcher::instance().empty())) {
95 detail::FdManager::instance().processOnce();
96 detail::FileDispatcher::instance().prepareRun();
97 detail::EventHookDispatcher::instance().prepareRun();
98 detail::TimerDispatcher::instance().prepareRun();
99 detail::FIFORunner::instance().run();
100 detail::TimerDispatcher::instance().reschedule();
104 prefix_ void senf::scheduler::restart()
106 detail::FdManager* fdm (&detail::FdManager::instance());
107 detail::FIFORunner* ffr (&detail::FIFORunner::instance());
108 detail::FdDispatcher* fdd (&detail::FdDispatcher::instance());
109 detail::TimerDispatcher* tdd (&detail::TimerDispatcher::instance());
110 detail::SignalDispatcher* sdd (&detail::SignalDispatcher::instance());
111 detail::FileDispatcher* fld (&detail::FileDispatcher::instance());
112 detail::EventHookDispatcher* eed (&detail::EventHookDispatcher::instance());
114 eed->~EventHookDispatcher();
115 fld->~FileDispatcher();
116 sdd->~SignalDispatcher();
117 tdd->~TimerDispatcher();
118 fdd->~FdDispatcher();
122 new (fdm) detail::FdManager();
123 new (ffr) detail::FIFORunner();
124 new (fdd) detail::FdDispatcher();
125 new (tdd) detail::TimerDispatcher();
126 new (sdd) detail::SignalDispatcher();
127 new (fld) detail::FileDispatcher();
128 new (eed) detail::EventHookDispatcher();
131 prefix_ bool senf::scheduler::empty()
133 return detail::FdDispatcher::instance().empty()
134 && detail::TimerDispatcher::instance().empty()
135 && detail::FileDispatcher::instance().empty()
136 && detail::SignalDispatcher::instance().empty()
137 && detail::EventHookDispatcher::instance().empty();
140 prefix_ void senf::scheduler::hiresTimers()
143 if (haveScalableHiresTimers())
144 detail::TimerDispatcher::instance().timerSource(
145 std::auto_ptr<detail::TimerSource>(new detail::TimerFDTimerSource()));
148 detail::TimerDispatcher::instance().timerSource(
149 std::auto_ptr<detail::TimerSource>(new detail::POSIXTimerSource()));
152 ///////////////////////////////////////////////////////////////////////////
153 // senf::schedulerLogTimeSource
155 prefix_ senf::log::time_type senf::scheduler::LogTimeSource::operator()()
161 ///////////////////////////////////////////////////////////////////////////
162 // senf::scheduler::BlockSignals
164 prefix_ senf::scheduler::BlockSignals::BlockSignals(bool initiallyBlocked)
167 ::sigfillset(&allSigs_);
168 if (initiallyBlocked)
172 prefix_ void senf::scheduler::BlockSignals::block()
176 ::sigprocmask(SIG_BLOCK, &allSigs_, &savedSigs_);
180 prefix_ void senf::scheduler::BlockSignals::unblock()
184 ::sigprocmask(SIG_SETMASK, &savedSigs_, 0);
188 ///////////////////////////////cc.e////////////////////////////////////////
195 // c-file-style: "senf"
196 // indent-tabs-mode: nil
197 // ispell-local-dictionary: "american"
198 // compile-command: "scons -u test"
199 // comment-column: 40