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 conditions:
12 // * Redistributions of source code must retain the above copyright notice,
13 // this list of conditions and the following disclaimers.
15 // * Redistributions in binary form must reproduce the above copyright notice,
16 // this list of conditions and the following disclaimers in the
17 // documentation and/or other materials provided with the distribution.
19 // * The names of the Software's authors and/or contributors
20 // may not be used to endorse or promote products derived from
21 // this Software without specific prior written permission.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
25 // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
26 // CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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28 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
31 #include <kernel/time.h>
32 #include <lowlevel/clock.h>
35 void TimerMux::arm(TimerEntry *entry, Time expiry)
37 AutoSpinLockRecIRQ autolock(lock);
39 bool was_empty = heap.empty();
43 oldexpiry = heap.get_top()->expiry;
45 // Shut up the compiler
46 oldexpiry.seconds = 0;
50 entry->expiry = expiry;
52 if (entry->is_armed())
57 Time newexpiry = heap.get_top()->expiry;
58 if (was_empty || oldexpiry != newexpiry)
59 parent.arm(newexpiry);
62 void TimerMux::disarm(TimerEntry *entry)
64 AutoSpinLockRecIRQ autolock(lock);
66 if (entry->is_armed()) {
67 bool was_top = entry == heap.get_top();
72 parent.arm(heap.get_top()->expiry);
78 DroppableAutoSpinLockRecIRQ autolock(lock);
81 TimerEntry *top = heap.get_top();
85 if (now < top->expiry)
96 parent.arm(heap.get_top()->expiry);
99 void TimerEntry::set_action(System::Events::Event *event)
104 void TimerEntry::action()
110 #include _KERNEL_SERVER(time/timer/footer.cc)