use a timer for the LGMP host instead of a thread

c-host/include/interface/platform.h

@@ -26,4 +26,4 @@ bool app_init();
 void app_quit();
 
 // these must be implemented for each OS
-const char * os_getExecutable();
+const char * os_getExecutable();

c-host/platform/Windows/src/platform.c

@@ -48,6 +48,7 @@ struct AppState
 };
 
 static struct AppState app = {0};
+HWND MessageHWND;
 
 // undocumented API to adjust the system timer resolution (yes, its a nasty hack)
 typedef NTSTATUS (__stdcall *ZwSetTimerResolution_t)(ULONG RequestedResolution, BOOLEAN Set, PULONG ActualResolution);
@@ -216,6 +217,9 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
   }
   app.messageWnd = CreateWindowEx(0, "DUMMY_CLASS", "DUMMY_NAME", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
 
+  // set the global
+  MessageHWND = app.messageWnd;
+
   app.trayMenu = CreatePopupMenu();
   AppendMenu(app.trayMenu, MF_STRING   , ID_MENU_OPEN_LOG, "Open Log File");
   AppendMenu(app.trayMenu, MF_SEPARATOR, 0               , NULL           );
@@ -297,4 +301,9 @@ bool app_init()
 const char * os_getExecutable()
 {
   return app.executable;
-}
+}
+
+HWND os_getMessageWnd()
+{
+  return app.messageWnd;
+}

c-host/platform/Windows/src/platform.h

@@ -30,4 +30,4 @@ struct MSG_CALL_FUNCTION
   LPARAM       lParam;
 };
 
-LRESULT sendAppMessage(UINT Msg, WPARAM wParam, LPARAM lParam);
+LRESULT sendAppMessage(UINT Msg, WPARAM wParam, LPARAM lParam);

c-host/src/app.c

@@ -28,6 +28,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include "common/thread.h"
 #include "common/ivshmem.h"
 #include "common/sysinfo.h"
+#include "common/time.h"
 
 #include <lgmp/host.h>
 
@@ -47,14 +48,14 @@ static const struct LGMPQueueConfig FRAME_QUEUE_CONFIG =
 {
   .queueID     = LGMP_Q_FRAME,
   .numMessages = LGMP_Q_FRAME_LEN,
-  .subTimeout  = 10000
+  .subTimeout  = 1000
 };
 
 static const struct LGMPQueueConfig POINTER_QUEUE_CONFIG =
 {
   .queueID     = LGMP_Q_POINTER,
   .numMessages = LGMP_Q_POINTER_LEN,
-  .subTimeout  = 10000
+  .subTimeout  = 1000
 };
 
 #define MAX_POINTER_SIZE (sizeof(KVMFRCursor) + (128 * 128 * 4))
@@ -78,32 +79,23 @@ struct app
 
   bool       running;
   bool       reinit;
-  LGThread * lgmpThread;
+  LGTimer  * lgmpTimer;
   LGThread * frameThread;
 };
 
 static struct app app;
 
-static int lgmpThread(void * opaque)
+static bool lgmpTimer(void * opaque)
 {
   LGMP_STATUS status;
-  while(app.running)
+  if ((status = lgmpHostProcess(app.lgmp)) != LGMP_OK)
   {
-    if ((status = lgmpHostProcess(app.lgmp)) != LGMP_OK)
-    {
-      DEBUG_ERROR("lgmpHostProcess Failed: %s", lgmpStatusString(status));
-      break;
-    }
-
-    /*
-     * do not decrease this value too far, see:
-     * https://lists.gnu.org/archive/html/qemu-devel/2020-01/msg06331.html
-     */
-    usleep(100 * 1000);
+    DEBUG_ERROR("lgmpHostProcess Failed: %s", lgmpStatusString(status));
+    app.running = false;
+    return false;
   }
 
-  app.running = false;
-  return 0;
+  return true;
 }
 
 static int frameThread(void * opaque)
@@ -210,9 +202,9 @@ static int frameThread(void * opaque)
 bool startThreads()
 {
   app.running = true;
-  if (!lgCreateThread("LGMPThread", lgmpThread, NULL, &app.lgmpThread))
+  if (!lgCreateTimer(100, lgmpTimer, NULL, &app.lgmpTimer))
   {
-    DEBUG_ERROR("Failed to create the LGMP thread");
+    DEBUG_ERROR("Failed to create the LGMP timer");
     return false;
   }
 
@@ -239,12 +231,11 @@ bool stopThreads()
   }
   app.frameThread = NULL;
 
-  if (app.lgmpThread && !lgJoinThread(app.lgmpThread, NULL))
+  if (app.lgmpTimer)
   {
-    DEBUG_WARN("Failed to join the LGMP thread");
-    ok = false;
+    lgTimerDestroy(app.lgmpTimer);
+    app.lgmpTimer = NULL;
   }
-  app.lgmpThread = NULL;
 
   return ok;
 }