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-rw-r--r--src/core/hle/kernel/timer.cpp39
-rw-r--r--src/core/hle/kernel/timer.h8
-rw-r--r--src/core/hle/svc.cpp5
3 files changed, 36 insertions, 16 deletions
diff --git a/src/core/hle/kernel/timer.cpp b/src/core/hle/kernel/timer.cpp
index 60537f355..c42003e9d 100644
--- a/src/core/hle/kernel/timer.cpp
+++ b/src/core/hle/kernel/timer.cpp
@@ -52,9 +52,14 @@ void Timer::Set(s64 initial, s64 interval) {
initial_delay = initial;
interval_delay = interval;
- u64 initial_microseconds = initial / 1000;
- CoreTiming::ScheduleEvent(usToCycles(initial_microseconds), timer_callback_event_type,
- callback_handle);
+ if (initial == 0) {
+ // Immediately invoke the callback
+ Signal(0);
+ } else {
+ u64 initial_microseconds = initial / 1000;
+ CoreTiming::ScheduleEvent(usToCycles(initial_microseconds), timer_callback_event_type,
+ callback_handle);
+ }
}
void Timer::Cancel() {
@@ -72,6 +77,20 @@ void Timer::WakeupAllWaitingThreads() {
signaled = false;
}
+void Timer::Signal(int cycles_late) {
+ LOG_TRACE(Kernel, "Timer %08" PRIx64 " fired", timer_handle);
+
+ // Resume all waiting threads
+ WakeupAllWaitingThreads();
+
+ if (interval_delay != 0) {
+ // Reschedule the timer with the interval delay
+ u64 interval_microseconds = interval_delay / 1000;
+ CoreTiming::ScheduleEvent(usToCycles(interval_microseconds) - 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 =
@@ -82,19 +101,7 @@ static void TimerCallback(u64 timer_handle, int cycles_late) {
return;
}
- LOG_TRACE(Kernel, "Timer %08" PRIx64 " fired", timer_handle);
-
- timer->signaled = true;
-
- // Resume all waiting threads
- timer->WakeupAllWaitingThreads();
-
- 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);
- }
+ timer->Signal(cycles_late);
}
void TimersInit() {
diff --git a/src/core/hle/kernel/timer.h b/src/core/hle/kernel/timer.h
index c174f5664..b0f818933 100644
--- a/src/core/hle/kernel/timer.h
+++ b/src/core/hle/kernel/timer.h
@@ -54,6 +54,14 @@ public:
void Cancel();
void Clear();
+ /**
+ * Signals the timer, waking up any waiting threads and rescheduling it
+ * for the next interval.
+ * This method should not be called from outside the timer callback handler,
+ * lest multiple callback events get scheduled.
+ */
+ void Signal(int cycles_late);
+
private:
Timer();
~Timer() override;
diff --git a/src/core/hle/svc.cpp b/src/core/hle/svc.cpp
index 96db39ad9..1baa80671 100644
--- a/src/core/hle/svc.cpp
+++ b/src/core/hle/svc.cpp
@@ -837,6 +837,11 @@ static ResultCode SetTimer(Kernel::Handle handle, s64 initial, s64 interval) {
LOG_TRACE(Kernel_SVC, "called timer=0x%08X", handle);
+ if (initial < 0 || interval < 0) {
+ return ResultCode(ErrorDescription::OutOfRange, ErrorModule::Kernel,
+ ErrorSummary::InvalidArgument, ErrorLevel::Permanent);
+ }
+
SharedPtr<Timer> timer = Kernel::g_handle_table.Get<Timer>(handle);
if (timer == nullptr)
return ERR_INVALID_HANDLE;