android, desktop: move function to different thread

apps/ios/Shared/Views/Chat/Group/GroupLinkView.swift

@@ -18,6 +18,7 @@ struct GroupLinkView: View {
     var linkCreatedCb: (() -> Void)? = nil
     @State private var creatingLink = false
     @State private var alert: GroupLinkAlert?
+    @State private var shouldCreate = true
 
     private enum GroupLinkAlert: Identifiable {
         case deleteLink
@@ -70,6 +71,7 @@ struct GroupLinkView: View {
                     }
                     .frame(height: 36)
                     SimpleXLinkQRCode(uri: groupLink)
+                        .id("simplex-qrcode-view-for-\(groupLink)")
                     Button {
                         showShareSheet(items: [simplexChatLink(groupLink)])
                     } label: {
@@ -125,9 +127,10 @@ struct GroupLinkView: View {
                 }
             }
             .onAppear {
-                if groupLink == nil && !creatingLink {
+                if groupLink == nil && !creatingLink && shouldCreate {
                     createGroupLink()
                 }
+                shouldCreate = false
             }
         }
     }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/SimpleXAPI.kt

@@ -451,7 +451,7 @@ object ChatController {
         }
         try {
           val msg = recvMsg(ctrl)
-          if (msg != null) processReceivedMsg(msg)
+          if (msg != null) withSingleThreadContext { processReceivedMsg(msg) }
         } catch (e: Exception) {
           Log.e(TAG, "ChatController recvMsg/processReceivedMsg exception: " + e.stackTraceToString());
         } catch (e: Throwable) {
@@ -465,19 +465,19 @@ object ChatController {
   suspend fun sendCmd(rhId: Long?, cmd: CC): CR {
     val ctrl = ctrl ?: throw Exception("Controller is not initialized")
 
-    //return withContext(Dispatchers.IO) {
-    val c = cmd.cmdString
-    chatModel.addTerminalItem(TerminalItem.cmd(rhId, cmd.obfuscated))
-    Log.d(TAG, "sendCmd: ${cmd.cmdType}")
-    val json = if (rhId == null) chatSendCmd(ctrl, c) else chatSendRemoteCmd(ctrl, rhId.toInt(), c)
-    val r = APIResponse.decodeStr(json)
-    Log.d(TAG, "sendCmd response type ${r.resp.responseType}")
-    if (r.resp is CR.Response || r.resp is CR.Invalid) {
-      Log.d(TAG, "sendCmd response json $json")
+    return withContext(Dispatchers.IO) {
+      val c = cmd.cmdString
+      chatModel.addTerminalItem(TerminalItem.cmd(rhId, cmd.obfuscated))
+      Log.d(TAG, "sendCmd: ${cmd.cmdType}")
+      val json = if (rhId == null) chatSendCmd(ctrl, c) else chatSendRemoteCmd(ctrl, rhId.toInt(), c)
+      val r = APIResponse.decodeStr(json)
+      Log.d(TAG, "sendCmd response type ${r.resp.responseType}")
+      if (r.resp is CR.Response || r.resp is CR.Invalid) {
+        Log.d(TAG, "sendCmd response json $json")
+      }
+      chatModel.addTerminalItem(TerminalItem.resp(rhId, r.resp))
+      r.resp
     }
-    chatModel.addTerminalItem(TerminalItem.resp(rhId, r.resp))
-    return r.resp
-    //}
   }
 
   private fun recvMsg(ctrl: ChatCtrl): APIResponse? {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/Utils.kt

@@ -42,6 +42,8 @@ fun withLongRunningApi(slow: Long = Long.MAX_VALUE, deadlock: Long = Long.MAX_VA
     CoroutineScope(Dispatchers.Default).launch(block = { wrapWithLogging(action, it, slow = slow, deadlock = deadlock) })
   }
 
+suspend fun withSingleThreadContext(action: suspend CoroutineScope.() -> Unit) = withContext(singleThreadDispatcher, action)
+
 private suspend fun wrapWithLogging(action: suspend CoroutineScope.() -> Unit, exception: java.lang.Exception, slow: Long = 10_000, deadlock: Long = 60_000) = coroutineScope {
   val start = System.currentTimeMillis()
   val job = launch {