1 files changed, 81 insertions, 0 deletions
diff --git a/src/core/hle/kernel/writable_event.cpp b/src/core/hle/kernel/writable_event.cpp
new file mode 100644
index 000000000..4eb387ac0
--- /dev/null
+++ b/src/core/hle/kernel/writable_event.cpp
@@ -0,0 +1,81 @@
+// 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/kernel.h"
+#include "core/hle/kernel/object.h"
+#include "core/hle/kernel/readable_event.h"
+#include "core/hle/kernel/thread.h"
+#include "core/hle/kernel/writable_event.h"
+
+namespace Kernel {
+
+WritableEvent::WritableEvent(KernelCore& kernel) : WaitObject{kernel} {}
+WritableEvent::~WritableEvent() = default;
+
+std::tuple<SharedPtr<WritableEvent>, SharedPtr<ReadableEvent>> WritableEvent::CreateEventPair(
+    KernelCore& kernel, ResetType reset_type, std::string name) {
+    SharedPtr<WritableEvent> writable_event(new WritableEvent(kernel));
+    SharedPtr<ReadableEvent> readable_event(new ReadableEvent(kernel));
+
+    writable_event->name = name + ":Writable";
+    writable_event->signaled = false;
+    writable_event->reset_type = reset_type;
+    readable_event->name = name + ":Readable";
+    readable_event->writable_event = writable_event;
+
+    return std::make_tuple(std::move(writable_event), std::move(readable_event));
+}
+
+SharedPtr<WritableEvent> WritableEvent::CreateRegisteredEventPair(KernelCore& kernel,
+                                                                  ResetType reset_type,
+                                                                  std::string name) {
+    auto [writable_event, readable_event] = CreateEventPair(kernel, reset_type, name);
+    kernel.AddNamedEvent(name, std::move(readable_event));
+    return std::move(writable_event);
+}
+
+bool WritableEvent::ShouldWait(Thread* thread) const {
+    return !signaled;
+}
+
+void WritableEvent::Acquire(Thread* thread) {
+    ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
+
+    if (reset_type == ResetType::OneShot)
+        signaled = false;
+}
+
+void WritableEvent::Signal() {
+    signaled = true;
+    WakeupAllWaitingThreads();
+}
+
+void WritableEvent::Clear() {
+    signaled = false;
+}
+
+void WritableEvent::ResetOnAcquire() {
+    if (reset_type == ResetType::OneShot)
+        Clear();
+}
+
+void WritableEvent::ResetOnWakeup() {
+    if (reset_type == ResetType::Pulse)
+        Clear();
+}
+
+bool WritableEvent::IsSignaled() const {
+    return signaled;
+}
+
+void WritableEvent::WakeupAllWaitingThreads() {
+    WaitObject::WakeupAllWaitingThreads();
+
+    if (reset_type == ResetType::Pulse)
+        signaled = false;
+}
+
+} // namespace Kernel