2014-05-28 04:16:13 +04:00
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// Copyright 2014 Citra Emulator Project
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2014-12-17 08:38:14 +03:00
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// Licensed under GPLv2 or any later version
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2014-11-19 11:49:13 +03:00
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// Refer to the license.txt file included.
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2014-05-28 04:16:13 +04:00
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#include <map>
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2014-06-06 06:35:36 +04:00
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#include <algorithm>
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2014-05-28 04:16:13 +04:00
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#include <vector>
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#include "common/common.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/event.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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class Event : public Object {
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public:
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std::string GetTypeName() const override { return "Event"; }
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std::string GetName() const override { return name; }
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2014-12-21 13:40:29 +03:00
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static const HandleType HANDLE_TYPE = HandleType::Event;
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HandleType GetHandleType() const override { return HANDLE_TYPE; }
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ResetType intitial_reset_type; ///< ResetType specified at Event initialization
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ResetType reset_type; ///< Current ResetType
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bool locked; ///< Event signal wait
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bool permanent_locked; ///< Hack - to set event permanent state (for easy passthrough)
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std::vector<Handle> waiting_threads; ///< Threads that are waiting for the event
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std::string name; ///< Name of event (optional)
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2014-10-23 07:20:01 +04:00
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ResultVal<bool> WaitSynchronization() override {
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bool wait = locked;
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if (locked) {
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Handle thread = GetCurrentThread()->GetHandle();
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if (std::find(waiting_threads.begin(), waiting_threads.end(), thread) == waiting_threads.end()) {
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waiting_threads.push_back(thread);
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}
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2014-12-22 16:07:22 +03:00
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Kernel::WaitCurrentThread(WAITTYPE_EVENT, this);
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}
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if (reset_type != RESETTYPE_STICKY && !permanent_locked) {
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locked = true;
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}
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return MakeResult<bool>(wait);
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}
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};
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2014-06-06 06:35:36 +04:00
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/**
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* Hackish function to set an events permanent lock state, used to pass through synch blocks
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* @param handle Handle to event to change
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* @param permanent_locked Boolean permanent locked value to set event
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* @return Result of operation, 0 on success, otherwise error code
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*/
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ResultCode SetPermanentLock(Handle handle, const bool permanent_locked) {
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Event* evt = g_handle_table.Get<Event>(handle).get();
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if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
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evt->permanent_locked = permanent_locked;
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return RESULT_SUCCESS;
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}
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2014-05-28 06:14:00 +04:00
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/**
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* Changes whether an event is locked or not
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* @param handle Handle to event to change
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* @param locked Boolean locked value to set event
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* @return Result of operation, 0 on success, otherwise error code
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*/
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ResultCode SetEventLocked(const Handle handle, const bool locked) {
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Event* evt = g_handle_table.Get<Event>(handle).get();
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if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
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if (!evt->permanent_locked) {
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evt->locked = locked;
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}
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return RESULT_SUCCESS;
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}
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/**
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* Signals an event
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* @param handle Handle to event to signal
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* @return Result of operation, 0 on success, otherwise error code
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*/
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ResultCode SignalEvent(const Handle handle) {
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Event* evt = g_handle_table.Get<Event>(handle).get();
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if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
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// Resume threads waiting for event to signal
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bool event_caught = false;
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for (size_t i = 0; i < evt->waiting_threads.size(); ++i) {
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Thread* thread = Kernel::g_handle_table.Get<Thread>(evt->waiting_threads[i]).get();
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if (thread != nullptr)
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thread->ResumeFromWait();
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// If any thread is signalled awake by this event, assume the event was "caught" and reset
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// the event. This will result in the next thread waiting on the event to block. Otherwise,
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// the event will not be reset, and the next thread to call WaitSynchronization on it will
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// not block. Not sure if this is correct behavior, but it seems to work.
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event_caught = true;
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}
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evt->waiting_threads.clear();
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if (!evt->permanent_locked) {
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evt->locked = event_caught;
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}
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return RESULT_SUCCESS;
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}
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/**
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* Clears an event
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* @param handle Handle to event to clear
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* @return Result of operation, 0 on success, otherwise error code
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*/
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ResultCode ClearEvent(Handle handle) {
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Event* evt = g_handle_table.Get<Event>(handle).get();
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if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
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if (!evt->permanent_locked) {
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evt->locked = true;
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}
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return RESULT_SUCCESS;
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}
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/**
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* Creates an event
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* @param handle Reference to handle for the newly created mutex
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* @param reset_type ResetType describing how to create event
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* @param name Optional name of event
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* @return Newly created Event object
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*/
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Event* CreateEvent(Handle& handle, const ResetType reset_type, const std::string& name) {
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Event* evt = new Event;
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2014-12-21 15:04:08 +03:00
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// TOOD(yuriks): Fix error reporting
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handle = Kernel::g_handle_table.Create(evt).ValueOr(INVALID_HANDLE);
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evt->locked = true;
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evt->permanent_locked = false;
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evt->reset_type = evt->intitial_reset_type = reset_type;
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evt->name = name;
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return evt;
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}
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/**
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* Creates an event
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* @param reset_type ResetType describing how to create event
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* @param name Optional name of event
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* @return Handle to newly created Event object
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*/
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Handle CreateEvent(const ResetType reset_type, const std::string& name) {
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Handle handle;
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Event* evt = CreateEvent(handle, reset_type, name);
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return handle;
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}
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} // namespace
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