suyu/src/core/hle/kernel/readable_event.cpp
Lioncash a3aa7aaf0b kernel/readable_event: Add member function for enforcing a strict reset contract
svcResetSignal relies on the event instance to have already been
signaled before attempting to reset it. If this isn't the case, then an
error code has to be returned.
2018-12-04 20:14:55 -05:00

54 lines
1.2 KiB
C++

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include "common/assert.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/object.h"
#include "core/hle/kernel/readable_event.h"
#include "core/hle/kernel/thread.h"
namespace Kernel {
ReadableEvent::ReadableEvent(KernelCore& kernel) : WaitObject{kernel} {}
ReadableEvent::~ReadableEvent() = default;
bool ReadableEvent::ShouldWait(Thread* thread) const {
return !signaled;
}
void ReadableEvent::Acquire(Thread* thread) {
ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
if (reset_type == ResetType::OneShot)
signaled = false;
}
void ReadableEvent::Signal() {
signaled = true;
WakeupAllWaitingThreads();
}
void ReadableEvent::Clear() {
signaled = false;
}
ResultCode ReadableEvent::Reset() {
if (!signaled) {
return ERR_INVALID_STATE;
}
Clear();
return RESULT_SUCCESS;
}
void ReadableEvent::WakeupAllWaitingThreads() {
WaitObject::WakeupAllWaitingThreads();
if (reset_type == ResetType::Pulse)
signaled = false;
}
} // namespace Kernel