1 files changed, 139 insertions, 0 deletions
diff --git a/src/corelib/kernel/qeventdispatcher_wasm_p.h b/src/corelib/kernel/qeventdispatcher_wasm_p.h
new file mode 100644
index 0000000000..7b257e02ad
--- /dev/null
+++ b/src/corelib/kernel/qeventdispatcher_wasm_p.h
@@ -0,0 +1,139 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QEVENTDISPATCHER_WASM_P_H
+#define QEVENTDISPATCHER_WASM_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qabstracteventdispatcher.h"
+#include "private/qtimerinfo_unix_p.h"
+#include <QtCore/qloggingcategory.h>
+#include <QtCore/qwaitcondition.h>
+
+#include <chrono>
+#include <mutex>
+#include <optional>
+#include <tuple>
+
+#include <emscripten/proxying.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_DECLARE_LOGGING_CATEGORY(lcEventDispatcher);
+Q_DECLARE_LOGGING_CATEGORY(lcEventDispatcherTimers)
+
+class Q_CORE_EXPORT QEventDispatcherWasm : public QAbstractEventDispatcherV2
+{
+    Q_OBJECT
+public:
+    QEventDispatcherWasm();
+    ~QEventDispatcherWasm();
+
+    bool processEvents(QEventLoop::ProcessEventsFlags flags) override;
+
+    void registerSocketNotifier(QSocketNotifier *notifier) override;
+    void unregisterSocketNotifier(QSocketNotifier *notifier) override;
+
+    void registerTimer(Qt::TimerId timerId, Duration interval, Qt::TimerType timerType,
+                       QObject *object) override final;
+    bool unregisterTimer(Qt::TimerId timerId) override final;
+    bool unregisterTimers(QObject *object) override final;
+    QList<TimerInfoV2> timersForObject(QObject *object) const override final;
+    Duration remainingTime(Qt::TimerId timerId) const override final;
+
+    void interrupt() override;
+    void wakeUp() override;
+
+    static void runOnMainThread(std::function<void(void)> fn);
+    static void socketSelect(int timeout, int socket, bool waitForRead, bool waitForWrite,
+                            bool *selectForRead, bool *selectForWrite, bool *socketDisconnect);
+
+    static void registerStartupTask();
+    static void completeStarupTask();
+    static void callOnLoadedIfRequired();
+    virtual void onLoaded();
+
+protected:
+    virtual bool processPostedEvents();
+
+private:
+    bool isMainThreadEventDispatcher();
+    bool isSecondaryThreadEventDispatcher();
+    static bool isValidEventDispatcherPointer(QEventDispatcherWasm *eventDispatcher);
+
+    void handleApplicationExec();
+    void handleDialogExec();
+    bool wait(int timeout = -1);
+    bool wakeEventDispatcherThread();
+    static void callProcessPostedEvents(void *eventDispatcher);
+
+    void processTimers();
+    void updateNativeTimer();
+    static void callProcessTimers(void *eventDispatcher);
+
+    static void setEmscriptenSocketCallbacks();
+    static void clearEmscriptenSocketCallbacks();
+    static void socketError(int fd, int err, const char* msg, void *context);
+    static void socketOpen(int fd, void *context);
+    static void socketListen(int fd, void *context);
+    static void socketConnection(int fd, void *context);
+    static void socketMessage(int fd, void *context);
+    static void socketClose(int fd, void *context);
+
+    static void setSocketState(int socket, bool setReadyRead, bool setReadyWrite);
+    static void clearSocketState(int socket);
+    void waitForSocketState(int timeout, int socket, bool checkRead, bool checkWrite,
+                            bool *selectForRead, bool *selectForWrite, bool *socketDisconnect);
+
+    static void run(std::function<void(void)> fn);
+    static void runAsync(std::function<void(void)> fn);
+    static void runOnMainThreadAsync(std::function<void(void)> fn);
+
+    static QEventDispatcherWasm *g_mainThreadEventDispatcher;
+
+    bool m_interrupted = false;
+    bool m_processTimers = false;
+    bool m_pendingProcessEvents = false;
+
+    QTimerInfoList *m_timerInfo = new QTimerInfoList();
+    long m_timerId = 0;
+    std::chrono::milliseconds m_timerTargetTime{};
+
+#if QT_CONFIG(thread)
+    std::mutex m_mutex;
+    bool m_wakeUpCalled = false;
+    std::condition_variable m_moreEvents;
+
+    static QVector<QEventDispatcherWasm *> g_secondaryThreadEventDispatchers;
+    static std::mutex g_staticDataMutex;
+    static emscripten::ProxyingQueue g_proxyingQueue;
+    static pthread_t g_mainThread;
+
+    // Note on mutex usage: the global g_staticDataMutex protects the global (g_ prefixed) data,
+    // while the per eventdispatcher m_mutex protects the state accociated with blocking and waking
+    // that eventdispatcher thread. The locking order is g_staticDataMutex first, then m_mutex.
+#endif
+
+    static std::multimap<int, QSocketNotifier *> g_socketNotifiers;
+
+    struct SocketReadyState {
+        QEventDispatcherWasm *waiter = nullptr;
+        bool waitForReadyRead = false;
+        bool waitForReadyWrite = false;
+        bool readyRead = false;
+        bool readyWrite = false;
+    };
+    static std::map<int, SocketReadyState> g_socketState;
+};
+
+#endif // QEVENTDISPATCHER_WASM_P_H