android/lib/src/main/cpp/androidapp.cpp |   13 +++++--------
 ios/Mobile/DocumentViewController.mm    |    3 ++-
 ios/ios.h                               |    2 --
 ios/ios.mm                              |    1 -
 wsd/LOOLWSD.cpp                         |    8 +++++---
 wsd/LOOLWSD.hpp                         |    4 ++++
 6 files changed, 16 insertions(+), 15 deletions(-)

New commits:
commit ad32888d7c2ec960255d826c245f7df2e93c3f1b
Author:     Jan Holesovsky <ke...@collabora.com>
AuthorDate: Thu Dec 5 22:27:16 2019 +0100
Commit:     Jan Holesovsky <ke...@collabora.com>
CommitDate: Thu Feb 6 09:44:26 2020 +0100

    mobile: Unify the mutex usage that protects the main lokit thread.
    
    Effectively both approaches were doing the same thing, let's unify to
    the iOS way to minimize the platform-specific code.
    
    Change-Id: I11290410a536c26db054ffcb87e3b64cc2a11c07
    Reviewed-on: https://gerrit.libreoffice.org/c/online/+/84589
    Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoff...@gmail.com>
    Reviewed-by: Jan Holesovsky <ke...@collabora.com>

diff --git a/android/lib/src/main/cpp/androidapp.cpp 
b/android/lib/src/main/cpp/androidapp.cpp
index 59079d935..10f4876ad 100644
--- a/android/lib/src/main/cpp/androidapp.cpp
+++ b/android/lib/src/main/cpp/androidapp.cpp
@@ -34,7 +34,6 @@ static int fakeClientFd;
 static int closeNotificationPipeForForwardingThread[2] = {-1, -1};
 static JavaVM* javaVM = nullptr;
 static bool lokInitialized = false;
-static std::mutex loolwsdRunningMutex;
 
 extern "C" JNIEXPORT jint JNICALL
 JNI_OnLoad(JavaVM* vm, void*) {
@@ -161,12 +160,11 @@ static void send2JS(const JNIThreadContext &jctx, jclass 
loActivityClz, jobject
 void closeDocument()
 {
     // Close one end of the socket pair, that will wake up the forwarding 
thread that was constructed in HULLO
-    if (fakeSocketClose(closeNotificationPipeForForwardingThread[0]) == 0)
-    {
-        LOG_DBG("Waiting for LOOLWSD to finish...");
-        std::unique_lock<std::mutex> lock(loolwsdRunningMutex);
-        LOG_DBG("LOOLWSD has finished.");
-    }
+    fakeSocketClose(closeNotificationPipeForForwardingThread[0]);
+
+    LOG_DBG("Waiting for LOOLWSD to finish...");
+    std::unique_lock<std::mutex> lock(LOOLWSD::lokit_main_mutex);
+    LOG_DBG("LOOLWSD has finished.");
 }
 
 /// Handle a message from JavaScript.
@@ -323,7 +321,6 @@ 
Java_org_libreoffice_androidlib_LOActivity_createLOOLWSD(JNIEnv *env, jobject, j
                     {
                         LOG_DBG("Creating LOOLWSD");
                         {
-                            std::unique_lock<std::mutex> 
lock(loolwsdRunningMutex);
                             fakeClientFd = fakeSocketSocket();
                             LOG_DBG("createLOOLWSD created fakeClientFd: " << 
fakeClientFd);
                             std::unique_ptr<LOOLWSD> loolwsd(new LOOLWSD());
diff --git a/ios/Mobile/DocumentViewController.mm 
b/ios/Mobile/DocumentViewController.mm
index a7731ced8..8c97826e9 100644
--- a/ios/Mobile/DocumentViewController.mm
+++ b/ios/Mobile/DocumentViewController.mm
@@ -19,6 +19,7 @@
 
 #import "ios.h"
 #import "FakeSocket.hpp"
+#import "LOOLWSD.hpp"
 #import "Log.hpp"
 #import "SigUtil.hpp"
 #import "Util.hpp"
@@ -434,7 +435,7 @@ static IMP standardImpOfInputAccessoryView = nil;
            }];
 
     // Wait for lokit_main thread to exit
-    std::lock_guard<std::mutex> lock(lokit_main_mutex);
+    std::lock_guard<std::mutex> lock(LOOLWSD::lokit_main_mutex);
 
     theSingleton = nil;
 
diff --git a/ios/ios.h b/ios/ios.h
index 7eb1e8357..a4283cefb 100644
--- a/ios/ios.h
+++ b/ios/ios.h
@@ -16,6 +16,4 @@ extern lok::Document *lok_document;
 
 extern LibreOfficeKit *lo_kit;
 
-extern std::mutex lokit_main_mutex;
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ios/ios.mm b/ios/ios.mm
index 8f3ccc3ca..97c49c3e9 100644
--- a/ios/ios.mm
+++ b/ios/ios.mm
@@ -20,6 +20,5 @@ extern "C" {
 int loolwsd_server_socket_fd = -1;
 lok::Document *lok_document = nullptr;
 LibreOfficeKit *lo_kit;
-std::mutex lokit_main_mutex;
 
 // vim:set shiftwidth=4 softtabstop=4 expandtab:
diff --git a/wsd/LOOLWSD.cpp b/wsd/LOOLWSD.cpp
index c8f4d0053..7fa1898ec 100644
--- a/wsd/LOOLWSD.cpp
+++ b/wsd/LOOLWSD.cpp
@@ -486,6 +486,10 @@ static size_t addNewChild(const 
std::shared_ptr<ChildProcess>& child)
     return count;
 }
 
+#if MOBILEAPP
+std::mutex LOOLWSD::lokit_main_mutex;
+#endif
+
 std::shared_ptr<ChildProcess> getNewChild_Blocks(
 #if MOBILEAPP
                                                  const std::string& uri
@@ -519,9 +523,7 @@ std::shared_ptr<ChildProcess> getNewChild_Blocks(
 
     std::thread([&]
                 {
-#ifdef IOS
-                    std::lock_guard<std::mutex> 
lokit_main_lock(lokit_main_mutex);
-#endif
+                    std::lock_guard<std::mutex> 
lokit_main_lock(LOOLWSD::lokit_main_mutex);
                     Util::setThreadName("lokit_main");
 
                     // Ugly to have that static global, otoh we know there is 
just one LOOLWSD
diff --git a/wsd/LOOLWSD.hpp b/wsd/LOOLWSD.hpp
index 35c283288..288ed6bb9 100644
--- a/wsd/LOOLWSD.hpp
+++ b/wsd/LOOLWSD.hpp
@@ -79,6 +79,10 @@ public:
     static std::string OverrideWatermark;
     static std::set<const Poco::Util::AbstractConfiguration*> 
PluginConfigurations;
     static std::chrono::time_point<std::chrono::system_clock> StartTime;
+#if MOBILEAPP
+    /// This is used to be able to wait until the lokit main thread has 
finished (and it is safe to load a new document).
+    static std::mutex lokit_main_mutex;
+#endif
 
     /// For testing only [!]
     static int getClientPortNumber();
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