mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-10 07:06:34 +00:00
90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
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/*
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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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constinit KThread g_cv_compare_thread;
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}
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Result KConditionVariable::SignalToAddress(KProcessAddress addr) {
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MESOSPHERE_UNIMPLEMENTED();
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}
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Result KConditionVariable::WaitForAddress(ams::svc::Handle handle, KProcessAddress addr, u32 value) {
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MESOSPHERE_UNIMPLEMENTED();
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}
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KThread *KConditionVariable::SignalImpl(KThread *thread) {
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MESOSPHERE_UNIMPLEMENTED();
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}
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void KConditionVariable::Signal(uintptr_t cv_key, s32 count) {
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/* Prepare for signaling. */
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constexpr int MaxThreads = 16;
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KLinkedList<KThread> thread_list;
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KThread *thread_array[MaxThreads];
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int num_to_close = 0;
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/* Perform signaling. */
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int num_waiters = 0;
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{
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KScopedSchedulerLock sl;
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g_cv_compare_thread.SetupForConditionVariableCompare(cv_key, -1);
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auto it = this->tree.nfind(g_cv_compare_thread);
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while ((it != this->tree.end()) && (count <= 0 || num_waiters < count) && (it->GetConditionVariableKey() == cv_key)) {
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KThread *target_thread = std::addressof(*it);
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if (KThread *thread = this->SignalImpl(target_thread); thread != nullptr) {
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if (num_to_close < MaxThreads) {
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thread_array[num_to_close++] = thread;
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} else {
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thread_list.push_back(*thread);
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}
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}
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it = this->tree.erase(it);
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target_thread->ClearConditionVariable();
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++num_waiters;
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}
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}
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/* Close threads in the array. */
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for (auto i = 0; i < num_to_close; ++i) {
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thread_array[i]->Close();
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}
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/* Close threads in the list. */
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if (num_waiters > MaxThreads) {
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auto it = thread_list.begin();
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while (it != thread_list.end()) {
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KThread *thread = std::addressof(*it);
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thread->Close();
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it = thread_list.erase(it);
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}
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}
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}
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Result KConditionVariable::Wait(KProcessAddress addr, uintptr_t key, u32 value, s64 timeout) {
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MESOSPHERE_UNIMPLEMENTED();
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}
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}
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