webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 215 insertions, 0 deletions

diff --git a/Source/WTF/wtf/glib/RunLoopGLib.cpp b/Source/WTF/wtf/glib/RunLoopGLib.cpp
new file mode 100644
index 000000000..927ce3254
--- /dev/null
+++ b/Source/WTF/wtf/glib/RunLoopGLib.cpp
@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Portions Copyright (c) 2010 Motorola Mobility, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "RunLoop.h"
+
+#include <glib.h>
+#include <wtf/MainThread.h>
+
+namespace WTF {
+
+static GSourceFuncs runLoopSourceFunctions = {
+    nullptr, // prepare
+    nullptr, // check
+    // dispatch
+    [](GSource* source, GSourceFunc callback, gpointer userData) -> gboolean
+    {
+        if (g_source_get_ready_time(source) == -1)
+            return G_SOURCE_CONTINUE;
+        g_source_set_ready_time(source, -1);
+        return callback(userData);
+    },
+    nullptr, // finalize
+    nullptr, // closure_callback
+    nullptr, // closure_marshall
+};
+
+RunLoop::RunLoop()
+{
+    m_mainContext = g_main_context_get_thread_default();
+    if (!m_mainContext)
+        m_mainContext = isMainThread() ? g_main_context_default() : adoptGRef(g_main_context_new());
+    ASSERT(m_mainContext);
+
+    GRefPtr<GMainLoop> innermostLoop = adoptGRef(g_main_loop_new(m_mainContext.get(), FALSE));
+    ASSERT(innermostLoop);
+    m_mainLoops.append(innermostLoop);
+
+    m_source = adoptGRef(g_source_new(&runLoopSourceFunctions, sizeof(GSource)));
+    g_source_set_name(m_source.get(), "[WebKit] RunLoop work");
+    g_source_set_can_recurse(m_source.get(), TRUE);
+    g_source_set_callback(m_source.get(), [](gpointer userData) -> gboolean {
+        static_cast<RunLoop*>(userData)->performWork();
+        return G_SOURCE_CONTINUE;
+    }, this, nullptr);
+    g_source_attach(m_source.get(), m_mainContext.get());
+}
+
+RunLoop::~RunLoop()
+{
+    g_source_destroy(m_source.get());
+
+    for (int i = m_mainLoops.size() - 1; i >= 0; --i) {
+        if (!g_main_loop_is_running(m_mainLoops[i].get()))
+            continue;
+        g_main_loop_quit(m_mainLoops[i].get());
+    }
+}
+
+void RunLoop::run()
+{
+    RunLoop& runLoop = RunLoop::current();
+    GMainContext* mainContext = runLoop.m_mainContext.get();
+
+    // The innermost main loop should always be there.
+    ASSERT(!runLoop.m_mainLoops.isEmpty());
+
+    GMainLoop* innermostLoop = runLoop.m_mainLoops[0].get();
+    if (!g_main_loop_is_running(innermostLoop)) {
+        g_main_context_push_thread_default(mainContext);
+        g_main_loop_run(innermostLoop);
+        g_main_context_pop_thread_default(mainContext);
+        return;
+    }
+
+    // Create and run a nested loop if the innermost one was already running.
+    GMainLoop* nestedMainLoop = g_main_loop_new(mainContext, FALSE);
+    runLoop.m_mainLoops.append(adoptGRef(nestedMainLoop));
+
+    g_main_context_push_thread_default(mainContext);
+    g_main_loop_run(nestedMainLoop);
+    g_main_context_pop_thread_default(mainContext);
+
+    runLoop.m_mainLoops.removeLast();
+}
+
+void RunLoop::stop()
+{
+    // The innermost main loop should always be there.
+    ASSERT(!m_mainLoops.isEmpty());
+    GRefPtr<GMainLoop> lastMainLoop = m_mainLoops.last();
+    if (g_main_loop_is_running(lastMainLoop.get()))
+        g_main_loop_quit(lastMainLoop.get());
+}
+
+void RunLoop::wakeUp()
+{
+    g_source_set_ready_time(m_source.get(), g_get_monotonic_time());
+}
+
+class DispatchAfterContext {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    DispatchAfterContext(Function<void ()>&& function)
+        : m_function(WTFMove(function))
+    {
+    }
+
+    void dispatch()
+    {
+        m_function();
+    }
+
+private:
+    Function<void ()> m_function;
+};
+
+void RunLoop::dispatchAfter(std::chrono::nanoseconds duration, Function<void ()>&& function)
+{
+    GRefPtr<GSource> source = adoptGRef(g_timeout_source_new(std::chrono::duration_cast<std::chrono::milliseconds>(duration).count()));
+    g_source_set_name(source.get(), "[WebKit] RunLoop dispatchAfter");
+
+    std::unique_ptr<DispatchAfterContext> context = std::make_unique<DispatchAfterContext>(WTFMove(function));
+    g_source_set_callback(source.get(), [](gpointer userData) -> gboolean {
+        std::unique_ptr<DispatchAfterContext> context(static_cast<DispatchAfterContext*>(userData));
+        context->dispatch();
+        return G_SOURCE_REMOVE;
+    }, context.release(), nullptr);
+    g_source_attach(source.get(), m_mainContext.get());
+}
+
+RunLoop::TimerBase::TimerBase(RunLoop& runLoop)
+    : m_runLoop(runLoop)
+    , m_source(adoptGRef(g_source_new(&runLoopSourceFunctions, sizeof(GSource))))
+{
+    g_source_set_name(m_source.get(), "[WebKit] RunLoop::Timer work");
+    g_source_set_callback(m_source.get(), [](gpointer userData) -> gboolean {
+        RunLoop::TimerBase* timer = static_cast<RunLoop::TimerBase*>(userData);
+        timer->fired();
+        if (timer->m_isRepeating)
+            timer->updateReadyTime();
+        return G_SOURCE_CONTINUE;
+    }, this, nullptr);
+    g_source_attach(m_source.get(), m_runLoop.m_mainContext.get());
+}
+
+RunLoop::TimerBase::~TimerBase()
+{
+    g_source_destroy(m_source.get());
+}
+
+void RunLoop::TimerBase::setPriority(int priority)
+{
+    g_source_set_priority(m_source.get(), priority);
+}
+
+void RunLoop::TimerBase::updateReadyTime()
+{
+    if (!m_fireInterval.count()) {
+        g_source_set_ready_time(m_source.get(), 0);
+        return;
+    }
+
+    gint64 currentTime = g_get_monotonic_time();
+    gint64 targetTime = currentTime + std::min<gint64>(G_MAXINT64 - currentTime, m_fireInterval.count());
+    ASSERT(targetTime >= currentTime);
+    g_source_set_ready_time(m_source.get(), targetTime);
+}
+
+void RunLoop::TimerBase::start(double fireInterval, bool repeat)
+{
+    auto intervalDuration = std::chrono::duration<double>(fireInterval);
+    auto safeDuration = std::chrono::microseconds::max();
+    if (intervalDuration < safeDuration)
+        safeDuration = std::chrono::duration_cast<std::chrono::microseconds>(intervalDuration);
+
+    m_fireInterval = safeDuration;
+    m_isRepeating = repeat;
+    updateReadyTime();
+}
+
+void RunLoop::TimerBase::stop()
+{
+    g_source_set_ready_time(m_source.get(), -1);
+}
+
+bool RunLoop::TimerBase::isActive() const
+{
+    return g_source_get_ready_time(m_source.get()) != -1;
+}
+
+} // namespace WTF