1 files changed, 159 insertions, 0 deletions

diff --git a/src/core/hle/kernel/event.cpp b/src/core/hle/kernel/event.cpp
new file mode 100644
index 000000000..127c0cfc6
--- /dev/null
+++ b/src/core/hle/kernel/event.cpp
@@ -0,0 +1,159 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.  
+
+#include <map>
+#include <algorithm>
+#include <vector>
+
+#include "common/common.h"
+
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/event.h"
+#include "core/hle/kernel/thread.h"
+
+namespace Kernel {
+
+class Event : public Object {
+public:
+    const char* GetTypeName() const { return "Event"; }
+    const char* GetName() const { return name.c_str(); }
+
+    static Kernel::HandleType GetStaticHandleType() { return Kernel::HandleType::Event; }
+    Kernel::HandleType GetHandleType() const { return Kernel::HandleType::Event; }
+
+    ResetType intitial_reset_type;          ///< ResetType specified at Event initialization
+    ResetType reset_type;                   ///< Current ResetType
+
+    bool locked;                            ///< Event signal wait
+    bool permanent_locked;                  ///< Hack - to set event permanent state (for easy passthrough)
+    std::vector<Handle> waiting_threads;    ///< Threads that are waiting for the event
+    std::string name;                       ///< Name of event (optional)
+
+    /**
+     * Wait for kernel object to synchronize
+     * @param wait Boolean wait set if current thread should wait as a result of sync operation
+     * @return Result of operation, 0 on success, otherwise error code
+     */
+    Result WaitSynchronization(bool* wait) {
+        *wait = locked;
+        if (locked) {
+            Handle thread = GetCurrentThreadHandle();
+            if (std::find(waiting_threads.begin(), waiting_threads.end(), thread) == waiting_threads.end()) {
+                waiting_threads.push_back(thread);
+            }
+            Kernel::WaitCurrentThread(WAITTYPE_EVENT);
+        }
+        if (reset_type != RESETTYPE_STICKY && !permanent_locked) {
+            locked = true;
+        }
+        return 0;
+    }
+};
+
+/**
+ * Hackish function to set an events permanent lock state, used to pass through synch blocks
+ * @param handle Handle to event to change
+ * @param permanent_locked Boolean permanent locked value to set event
+ * @return Result of operation, 0 on success, otherwise error code
+ */
+Result SetPermanentLock(Handle handle, const bool permanent_locked) {
+    Event* evt = g_object_pool.GetFast<Event>(handle);
+    _assert_msg_(KERNEL, (evt != nullptr), "called, but event is nullptr!");
+
+    evt->permanent_locked = permanent_locked;
+    return 0;
+}
+
+/**
+ * Changes whether an event is locked or not
+ * @param handle Handle to event to change
+ * @param locked Boolean locked value to set event
+ * @return Result of operation, 0 on success, otherwise error code
+ */
+Result SetEventLocked(const Handle handle, const bool locked) {
+    Event* evt = g_object_pool.GetFast<Event>(handle);
+    _assert_msg_(KERNEL, (evt != nullptr), "called, but event is nullptr!");
+
+    if (!evt->permanent_locked) {
+        evt->locked = locked;
+    }
+    return 0;
+}
+
+/**
+ * Signals an event
+ * @param handle Handle to event to signal
+ * @return Result of operation, 0 on success, otherwise error code
+ */
+Result SignalEvent(const Handle handle) {
+    Event* evt = g_object_pool.GetFast<Event>(handle);
+    _assert_msg_(KERNEL, (evt != nullptr), "called, but event is nullptr!");
+
+    // Resume threads waiting for event to signal
+    bool event_caught = false;
+    for (size_t i = 0; i < evt->waiting_threads.size(); ++i) {
+        ResumeThreadFromWait( evt->waiting_threads[i]);
+
+        // If any thread is signalled awake by this event, assume the event was "caught" and reset 
+        // the event. This will result in the next thread waiting on the event to block. Otherwise,
+        // the event will not be reset, and the next thread to call WaitSynchronization on it will
+        // not block. Not sure if this is correct behavior, but it seems to work.
+        event_caught = true;
+    }
+    evt->waiting_threads.clear();
+
+    if (!evt->permanent_locked) {
+        evt->locked = event_caught;
+    }
+    return 0;
+}
+
+/**
+ * Clears an event
+ * @param handle Handle to event to clear
+ * @return Result of operation, 0 on success, otherwise error code
+ */
+Result ClearEvent(Handle handle) {
+    Event* evt = g_object_pool.GetFast<Event>(handle);
+    _assert_msg_(KERNEL, (evt != nullptr), "called, but event is nullptr!");
+
+    if (!evt->permanent_locked) {
+        evt->locked = true;
+    }
+    return 0;
+}
+
+/**
+ * Creates an event
+ * @param handle Reference to handle for the newly created mutex
+ * @param reset_type ResetType describing how to create event
+ * @param name Optional name of event
+ * @return Newly created Event object
+ */
+Event* CreateEvent(Handle& handle, const ResetType reset_type, const std::string& name) {
+    Event* evt = new Event;
+
+    handle = Kernel::g_object_pool.Create(evt);
+
+    evt->locked = true;
+    evt->permanent_locked = false;
+    evt->reset_type = evt->intitial_reset_type = reset_type;
+    evt->name = name;
+
+    return evt;
+}
+
+/**
+ * Creates an event
+ * @param reset_type ResetType describing how to create event
+ * @param name Optional name of event
+ * @return Handle to newly created Event object
+ */
+Handle CreateEvent(const ResetType reset_type, const std::string& name) {
+    Handle handle;
+    Event* evt = CreateEvent(handle, reset_type, name);
+    return handle;
+}
+
+} // namespace