mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-05 04:28:04 +01:00
183 lines
6.0 KiB
C++
183 lines
6.0 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern {
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namespace {
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constexpr s64 DefaultTimeout = ams::svc::Tick(TimeSpan::FromSeconds(10));
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}
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void KResourceLimit::Initialize() {
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/* This should be unnecessary for us, because our constructor will clear all fields. */
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/* The following is analagous to what Nintendo's implementation (no constexpr constructor) would do, though. */
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/*
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m_waiter_count = 0;
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for (size_t i = 0; i < util::size(m_limit_values); i++) {
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m_limit_values[i] = 0;
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m_current_values[i] = 0;
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m_current_hints[i] = 0;
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m_peak_values[i] = 0;
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}
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*/
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}
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void KResourceLimit::Finalize() {
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/* ... */
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}
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s64 KResourceLimit::GetLimitValue(ams::svc::LimitableResource which) const {
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MESOSPHERE_ASSERT_THIS();
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s64 value;
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{
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KScopedLightLock lk(m_lock);
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value = m_limit_values[which];
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MESOSPHERE_ASSERT(value >= 0);
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MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
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MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
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}
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return value;
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}
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s64 KResourceLimit::GetCurrentValue(ams::svc::LimitableResource which) const {
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MESOSPHERE_ASSERT_THIS();
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s64 value;
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{
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KScopedLightLock lk(m_lock);
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value = m_current_values[which];
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MESOSPHERE_ASSERT(value >= 0);
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MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
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MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
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}
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return value;
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}
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s64 KResourceLimit::GetPeakValue(ams::svc::LimitableResource which) const {
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MESOSPHERE_ASSERT_THIS();
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s64 value;
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{
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KScopedLightLock lk(m_lock);
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value = m_peak_values[which];
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MESOSPHERE_ASSERT(value >= 0);
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MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
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MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
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}
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return value;
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}
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s64 KResourceLimit::GetFreeValue(ams::svc::LimitableResource which) const {
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MESOSPHERE_ASSERT_THIS();
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s64 value;
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{
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KScopedLightLock lk(m_lock);
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MESOSPHERE_ASSERT(m_current_values[which] >= 0);
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MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
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MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
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value = m_limit_values[which] - m_current_values[which];
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}
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return value;
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}
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Result KResourceLimit::SetLimitValue(ams::svc::LimitableResource which, s64 value) {
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MESOSPHERE_ASSERT_THIS();
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KScopedLightLock lk(m_lock);
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R_UNLESS(m_current_values[which] <= value, svc::ResultInvalidState());
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m_limit_values[which] = value;
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return ResultSuccess();
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}
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bool KResourceLimit::Reserve(ams::svc::LimitableResource which, s64 value) {
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return this->Reserve(which, value, KHardwareTimer::GetTick() + DefaultTimeout);
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}
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bool KResourceLimit::Reserve(ams::svc::LimitableResource which, s64 value, s64 timeout) {
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MESOSPHERE_ASSERT_THIS();
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MESOSPHERE_ASSERT(value >= 0);
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KScopedLightLock lk(m_lock);
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MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
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if (m_current_hints[which] >= m_limit_values[which]) {
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return false;
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}
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/* Loop until we reserve or run out of time. */
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while (true) {
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MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
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MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
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/* If we would overflow, don't allow to succeed. */
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if (m_current_values[which] + value <= m_current_values[which]) {
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break;
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}
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if (m_current_values[which] + value <= m_limit_values[which]) {
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m_current_values[which] += value;
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m_current_hints[which] += value;
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m_peak_values[which] = std::max(m_peak_values[which], m_current_values[which]);
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return true;
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}
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if (m_current_hints[which] + value <= m_limit_values[which] && (timeout < 0 || KHardwareTimer::GetTick() < timeout)) {
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m_waiter_count++;
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m_cond_var.Wait(&m_lock, timeout);
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m_waiter_count--;
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} else {
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break;
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}
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}
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return false;
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}
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void KResourceLimit::Release(ams::svc::LimitableResource which, s64 value) {
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this->Release(which, value, value);
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}
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void KResourceLimit::Release(ams::svc::LimitableResource which, s64 value, s64 hint) {
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MESOSPHERE_ASSERT_THIS();
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MESOSPHERE_ASSERT(value >= 0);
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MESOSPHERE_ASSERT(hint >= 0);
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KScopedLightLock lk(m_lock);
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MESOSPHERE_ASSERT(m_current_values[which] <= m_limit_values[which]);
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MESOSPHERE_ASSERT(m_current_hints[which] <= m_current_values[which]);
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MESOSPHERE_ASSERT(value <= m_current_values[which]);
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MESOSPHERE_ASSERT(hint <= m_current_hints[which]);
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m_current_values[which] -= value;
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m_current_hints[which] -= hint;
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if (m_waiter_count != 0) {
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m_cond_var.Broadcast();
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}
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}
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}
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