wasm: implement socket notifier support

Implement socket notifier support using Emscripten’s
socket callbacks.

This is sufficient for supporting non-blocking (tunneled)
TCP and UDP sockets on the main thread.

Change-Id: Ib9ee2698d029fb94d954c6872f8e118b0aa15499
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
(cherry picked from commit 44d2f97bff647d3e3c0064ad97cf82cb5d3b47b3)

1 files changed, 10 insertions, 0 deletions

diff --git a/src/corelib/kernel/qeventdispatcher_wasm_p.h b/src/corelib/kernel/qeventdispatcher_wasm_p.h
index 429ec9e129..70437e836c 100644
--- a/src/corelib/kernel/qeventdispatcher_wasm_p.h
+++ b/src/corelib/kernel/qeventdispatcher_wasm_p.h
@@ -103,6 +103,15 @@ private:
     void updateNativeTimer();
     static void callProcessTimers(void *eventDispatcher);
 
+    void setEmscriptenSocketCallbacks();
+    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);
+
 #if QT_CONFIG(thread)
     void runOnMainThread(std::function<void(void)> fn);
 #endif
@@ -125,6 +134,7 @@ private:
     static QVector<QEventDispatcherWasm *> g_secondaryThreadEventDispatchers;
     static std::mutex g_secondaryThreadEventDispatchersMutex;
 #endif
+    static std::multimap<int, QSocketNotifier *> g_socketNotifiers;
 };
 
 #endif // QEVENTDISPATCHER_WASM_P_H