1 // lib/kernel/time/timer.cc -- Generic timer multiplexing
3 // This software is copyright (c) 2006 Scott Wood <scott@buserror.net>.
5 // Permission is hereby granted, free of charge, to any person obtaining a copy of
6 // this software and associated documentation files (the "Software"), to deal with
7 // the Software without restriction, including without limitation the rights to
8 // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
9 // of the Software, and to permit persons to whom the Software is furnished to do
10 // so, subject to the following condition:
12 // The above copyright notice and this permission notice shall be
13 // included in all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
23 #include <kernel/time.h>
24 #include <lowlevel/clock.h>
27 void TimerMux::arm(TimerEntry *entry, Time expiry)
29 AutoSpinLockRecIRQ autolock(lock);
31 bool was_empty = heap.empty();
35 oldexpiry = heap.get_top()->expiry;
37 // Shut up the compiler
38 oldexpiry.seconds = 0;
42 entry->expiry = expiry;
44 if (entry->is_armed())
49 Time newexpiry = heap.get_top()->expiry;
50 if (was_empty || oldexpiry != newexpiry)
51 parent.arm(newexpiry);
54 void TimerMux::disarm(TimerEntry *entry)
56 AutoSpinLockRecIRQ autolock(lock);
58 if (entry->is_armed()) {
59 bool was_top = entry == heap.get_top();
64 parent.arm(heap.get_top()->expiry);
70 DroppableAutoSpinLockRecIRQ autolock(lock);
73 TimerEntry *top = heap.get_top();
77 if (now < top->expiry)
88 parent.arm(heap.get_top()->expiry);
91 void TimerEntry::set_action(System::Events::Event *event)
96 void TimerEntry::action()
102 #include _KERNEL_SERVER(time/timer/footer.cc)