git subrepo clone https://github.com/Atmosphere-NX/Atmosphere-libs libraries

subrepo:
  subdir:   "libraries"
  merged:   "07af583b"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "07af583b"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"

libraries/libstratosphere/include/stratosphere/os/os_condvar.hpp

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2018-2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "os_mutex.hpp"
+
+namespace ams::os {
+
+    enum class ConditionVariableStatus {
+        TimedOut = 0,
+        Success  = 1,
+    };
+
+    class ConditionVariable {
+        NON_COPYABLE(ConditionVariable);
+        NON_MOVEABLE(ConditionVariable);
+        private:
+            CondVar cv;
+        public:
+            ConditionVariable() {
+                condvarInit(&cv);
+            }
+
+            ConditionVariableStatus TimedWait(::Mutex *m, u64 timeout) {
+                if (timeout > 0) {
+                    /* Abort on any error other than timed out/success. */
+                    R_TRY_CATCH(condvarWaitTimeout(&this->cv, m, timeout)) {
+                        R_CATCH(svc::ResultTimedOut) { return ConditionVariableStatus::TimedOut; }
+                    } R_END_TRY_CATCH_WITH_ASSERT;
+
+                    return ConditionVariableStatus::Success;
+                }
+                return ConditionVariableStatus::TimedOut;
+            }
+
+            void Wait(::Mutex *m) {
+                R_ASSERT(condvarWait(&this->cv, m));
+            }
+
+            ConditionVariableStatus TimedWait(os::Mutex *m, u64 timeout) {
+                return this->TimedWait(m->GetMutex(), timeout);
+            }
+
+            void Wait(os::Mutex *m) {
+                return this->Wait(m->GetMutex());
+            }
+
+            void Signal() {
+                condvarWakeOne(&this->cv);
+            }
+
+            void Broadcast() {
+                condvarWakeAll(&this->cv);
+            }
+    };
+
+}