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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cinttypes>
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core_timing.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/timer.h"
namespace Kernel {
/// The event type of the generic timer callback event
static CoreTiming::EventType* timer_callback_event_type = nullptr;
// 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;
Timer::Timer() {}
Timer::~Timer() {}
SharedPtr<Timer> Timer::Create(ResetType reset_type, std::string name) {
SharedPtr<Timer> timer(new 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).Unwrap();
return timer;
}
bool Timer::ShouldWait(Thread* thread) const {
return !signaled;
}
void Timer::Acquire(Thread* thread) {
ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
if (reset_type == ResetType::OneShot)
signaled = false;
}
void Timer::Set(s64 initial, s64 interval) {
// Ensure we get rid of any previous scheduled event
Cancel();
initial_delay = initial;
interval_delay = interval;
if (initial == 0) {
// Immediately invoke the callback
Signal(0);
} else {
CoreTiming::ScheduleEvent(CoreTiming::nsToCycles(initial), timer_callback_event_type,
callback_handle);
}
}
void Timer::Cancel() {
CoreTiming::UnscheduleEvent(timer_callback_event_type, callback_handle);
}
void Timer::Clear() {
signaled = false;
}
void Timer::WakeupAllWaitingThreads() {
WaitObject::WakeupAllWaitingThreads();
if (reset_type == ResetType::Pulse)
signaled = false;
}
void Timer::Signal(int cycles_late) {
LOG_TRACE(Kernel, "Timer {} fired", GetObjectId());
signaled = true;
// Resume all waiting threads
WakeupAllWaitingThreads();
if (interval_delay != 0) {
// Reschedule the timer with the interval delay
CoreTiming::ScheduleEvent(CoreTiming::nsToCycles(interval_delay) - cycles_late,
timer_callback_event_type, callback_handle);
}
}
/// 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>(static_cast<Handle>(timer_handle));
if (timer == nullptr) {
LOG_CRITICAL(Kernel, "Callback fired for invalid timer {:016X}", timer_handle);
return;
}
timer->Signal(cycles_late);
}
void TimersInit() {
timer_callback_handle_table.Clear();
timer_callback_event_type = CoreTiming::RegisterEvent("TimerCallback", TimerCallback);
}
void TimersShutdown() {}
} // namespace Kernel
|
