1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/common.h"
#include "core/core_timing.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/timer.h"
#include "core/hle/kernel/thread.h"
namespace Kernel {
/// The event type of the generic timer callback event
static int timer_callback_event_type = -1;
// TODO(yuriks): This can be removed if Timer objects are explicitly pooled in the future, allowing
// us to simply use a pool index or similar.
static Kernel::HandleTable timer_callback_handle_table;
ResultVal<SharedPtr<Timer>> Timer::Create(ResetType reset_type, std::string name) {
SharedPtr<Timer> timer(new Timer);
// TOOD(yuriks): Don't create Handle (see Thread::Create())
CASCADE_RESULT(auto unused, Kernel::g_handle_table.Create(timer));
timer->reset_type = reset_type;
timer->signaled = false;
timer->name = std::move(name);
timer->initial_delay = 0;
timer->interval_delay = 0;
timer->callback_handle = timer_callback_handle_table.Create(timer).MoveFrom();
return MakeResult<SharedPtr<Timer>>(timer);
}
bool Timer::ShouldWait() {
return !signaled;
}
void Timer::Acquire() {
_assert_msg_(Kernel, !ShouldWait(), "object unavailable!");
}
void Timer::Set(s64 initial, s64 interval) {
// Ensure we get rid of any previous scheduled event
Cancel();
initial_delay = initial;
interval_delay = interval;
u64 initial_microseconds = initial / 1000;
CoreTiming::ScheduleEvent(usToCycles(initial_microseconds),
timer_callback_event_type, callback_handle);
}
void Timer::Cancel() {
CoreTiming::UnscheduleEvent(timer_callback_event_type, callback_handle);
}
void Timer::Clear() {
signaled = false;
}
/// The timer callback event, called when a timer is fired
static void TimerCallback(u64 timer_handle, int cycles_late) {
SharedPtr<Timer> timer = timer_callback_handle_table.Get<Timer>(timer_handle);
if (timer == nullptr) {
LOG_CRITICAL(Kernel, "Callback fired for invalid timer %08X", timer_handle);
return;
}
LOG_TRACE(Kernel, "Timer %u fired", timer_handle);
timer->signaled = true;
// Resume all waiting threads
timer->WakeupAllWaitingThreads();
if (timer->reset_type == RESETTYPE_ONESHOT)
timer->signaled = false;
if (timer->interval_delay != 0) {
// Reschedule the timer with the interval delay
u64 interval_microseconds = timer->interval_delay / 1000;
CoreTiming::ScheduleEvent(usToCycles(interval_microseconds) - cycles_late,
timer_callback_event_type, timer_handle);
}
}
void TimersInit() {
timer_callback_event_type = CoreTiming::RegisterEvent("TimerCallback", TimerCallback);
}
void TimersShutdown() {
}
} // namespace
|
