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Kernel: Snooze the NetworkTask until there are incoming packets to process.

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This is accomplished using a new Alarm class and a BlockedSnoozing state.
Basically, you call Process::snooze_until(some_alarm) and then the scheduler
won't wake up the process until some_alarm.is_ringing() returns true.
This commit is contained in:
Andreas Kling 2019-03-20 17:09:46 +01:00
parent 93aa4d581d
commit bc1da7f1fd
6 changed files with 51 additions and 6 deletions
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8
Kernel/Process.cpp
View file

@ -1735,6 +1735,13 @@ void Process::unblock()
m_state = Process::Runnable;
}
void Process::snooze_until(Alarm& alarm)
{
m_snoozing_alarm = &alarm;
block(Process::BlockedSnoozing);
Scheduler::yield();
}
void Process::block(Process::State new_state)
{
if (state() != Process::Running) {
@ -2871,6 +2878,7 @@ const char* to_string(Process::State state)
case Process::BlockedConnect: return "Connect";
case Process::BlockedReceive: return "Receive";
case Process::BeingInspected: return "Inspect";
case Process::BlockedSnoozing: return "Snoozing";
}
kprintf("to_string(Process::State): Invalid state: %u\n", state);
ASSERT_NOT_REACHED();