wx: Optimize command queues

Remove allocations

4 files changed, 316 insertions, 185 deletions

diff --git a/lib/wx/c_src/wxe_helpers.cpp b/lib/wx/c_src/wxe_helpers.cpp
index 15d75080d9..120919e7aa 100644
--- a/lib/wx/c_src/wxe_helpers.cpp
+++ b/lib/wx/c_src/wxe_helpers.cpp
@@ -24,23 +24,96 @@
  * Erlang Commands
  * ****************************************************************************/
 
-wxeCommand::wxeCommand(int fc,char * cbuf,int buflen, wxe_data *sd)
-  : wxObject()
+wxeCommand::wxeCommand()
 {
+}
+
+wxeCommand::~wxeCommand()
+{
+  Delete();
+}
+
+void wxeCommand::Delete()
+{
+  int n = 0;
+
+  if(buffer) {
+    while(bin[n]) {
+      if(bin[n]->bin)
+	driver_free_binary(bin[n]->bin);
+      driver_free(bin[n++]);
+    }
+    if(len > 64)
+      driver_free(buffer);
+    buffer = NULL;
+    op = -1;
+  }
+}
+
+/* ****************************************************************************
+ * wxeFifo
+ * ****************************************************************************/
+wxeFifo::wxeFifo(unsigned int sz)
+{
+  m_q = (wxeCommand *) driver_alloc(sizeof(wxeCommand) * sz);
+  m_orig_sz = sz;
+  m_max = sz;
+  m_n = 0;
+  m_first = 0;
+  m_old = NULL;
+  for(unsigned int i = 0; i < sz; i++) {
+    m_q[i].buffer = NULL;
+    m_q[i].op = -1;
+  }
+}
+
+wxeFifo::~wxeFifo() {
+  // dealloc all memory buffers
+  driver_free(m_q);
+}
+
+wxeCommand * wxeFifo::Get()
+{
+  unsigned int pos;
+  if(m_n > 0) {
+    pos = m_first++;
+    m_n--;
+    m_first %= m_max;
+    return &m_q[pos];
+  }
+  return NULL;
+}
+
+void wxeFifo::Add(int fc, char * cbuf,int buflen, wxe_data *sd)
+{
+  unsigned int pos;
+  wxeCommand *curr;
+
   WXEBinRef *temp, *start, *prev;
   int n = 0;
-  ref_count = 1;
-  caller = driver_caller(sd->port_handle);
-  port   = sd->port;
-  op = fc;
-  len = buflen;
-  bin[0] = NULL;
-  bin[1] = NULL;
-  bin[2] = NULL;
+
+  if(m_n == (m_max-1)) { // resize
+    Realloc();
+  }
+
+  pos = (m_first + m_n) % m_max;
+  m_n++;
+
+  curr = &m_q[pos];
+  curr->caller = driver_caller(sd->port_handle);
+  curr->port   = sd->port;
+  curr->op  = fc;
+  curr->len = buflen;
+  curr->bin[0] = NULL;
+  curr->bin[1] = NULL;
+  curr->bin[2] = NULL;
 
   if(cbuf) {
-    buffer = (char *) driver_alloc(len);
-    memcpy((void *) buffer, (void *) cbuf, len);;
+    if(buflen > 64)
+      curr->buffer = (char *) driver_alloc(buflen);
+    else
+      curr->buffer = curr->c_buf;
+    memcpy((void *) curr->buffer, (void *) cbuf, buflen);
 
     temp = sd->bin;
 
@@ -48,8 +121,8 @@ wxeCommand::wxeCommand(int fc,char * cbuf,int buflen, wxe_data *sd)
     start = temp;
 
     while(temp) {
-      if(caller == temp->from) {
-	bin[n++] = temp;
+      if(curr->caller == temp->from) {
+	curr->bin[n++] = temp;
 	if(prev) {
 	  prev->next = temp->next;
 	} else {
@@ -63,20 +136,68 @@ wxeCommand::wxeCommand(int fc,char * cbuf,int buflen, wxe_data *sd)
     }
     sd->bin = start;
   } else {   // No-op only PING currently
-    buffer = NULL;
+    curr->buffer = NULL;
   }
 }
 
-wxeCommand::~wxeCommand() {
-  int n = 0;
-  if(buffer) {
-    while(bin[n]) {
-      if(bin[n]->bin)
-	driver_free_binary(bin[n]->bin);
-      driver_free(bin[n++]);
+void wxeFifo::Append(wxeCommand *orig)
+{
+  unsigned int pos;
+  wxeCommand *curr;
+  if(m_n == (m_max-1)) { // resize
+    Realloc();
+  }
+
+  pos = (m_first + m_n) % m_max;
+  m_n++;
+  curr = &m_q[pos];
+  curr->caller = orig->caller;
+  curr->port   = orig->port;
+  curr->op = orig->op;
+  curr->len = orig->len;
+  curr->bin[0] = orig->bin[0];
+  curr->bin[1] = orig->bin[1];
+  curr->bin[2] = orig->bin[2];
+
+  if(orig->len > 64)
+    curr->buffer = orig->buffer;
+  else {
+    curr->buffer = curr->c_buf;
+    memcpy((void *) curr->buffer, (void *) orig->buffer, orig->len);
+  }
+  orig->op = -1;
+  orig->buffer = NULL;
+  orig->bin[0] = NULL;
+}
+
+void wxeFifo::Realloc()
+{
+  unsigned int i;
+  unsigned int growth = m_orig_sz / 2;
+  unsigned int new_sz = growth + m_max;
+  unsigned int max  = m_max;
+  unsigned int first = m_first;
+  unsigned int n = m_n;
+  wxeCommand * old = m_q;
+  wxeCommand * queue = (wxeCommand *)driver_alloc(new_sz*sizeof(wxeCommand));
+
+  m_max=new_sz;
+  m_first = 0;
+  m_n=0;
+  m_q = queue;
+
+  for(i=0; i < n; i++) {
+    unsigned int pos = i+first;
+    if(old[pos%max].op >= 0) {
+      Append(&old[pos%max]);
     }
-    driver_free(buffer);
   }
+  for(i = m_n; i < new_sz; i++) { // Reset the rest
+    m_q[i].buffer = NULL;
+    m_q[i].op = -1;
+  }
+  // Can not free old queue here it can be used in the wx thread
+  m_old = old;
 }
 
 /* ****************************************************************************
diff --git a/lib/wx/c_src/wxe_helpers.h b/lib/wx/c_src/wxe_helpers.h
index 659bc666c6..ec3a5debdb 100644
--- a/lib/wx/c_src/wxe_helpers.h
+++ b/lib/wx/c_src/wxe_helpers.h
@@ -39,14 +39,14 @@ class wxeMetaCommand : public wxEvent
     ErlDrvPDL        pdl;
 };
 
-class wxeCommand : public wxObject
+class wxeCommand
 {
  public:
-    wxeCommand(int fc,char * cbuf,int buflen, wxe_data *);
+    wxeCommand();
     virtual ~wxeCommand(); // Use Delete()
 
-    wxeCommand * Save() {ref_count++; return this; };
-    void Delete() {if(--ref_count < 1) delete this;};
+    wxeCommand * Save() { return this; };
+    void Delete();
 
     ErlDrvTermData   caller;
     ErlDrvTermData   port;
@@ -54,7 +54,27 @@ class wxeCommand : public wxObject
     char *           buffer;
     int              len;
     int              op;
-    int              ref_count;
+    char             c_buf[64];  // 64b covers 90% of usage
+};
+
+class wxeFifo {
+ public:
+    wxeFifo(unsigned int size);
+    virtual ~wxeFifo();
+
+    void Add(int fc, char * cbuf,int buflen, wxe_data *);
+    void Append(wxeCommand *Other);
+
+    wxeCommand * Get();
+
+    void Realloc();
+
+    unsigned int m_max;
+    unsigned int m_first;
+    unsigned int m_n;
+    unsigned int m_orig_sz;
+    wxeCommand *m_q;
+    wxeCommand *m_old;
 };
 
 class intListElement {
diff --git a/lib/wx/c_src/wxe_impl.cpp b/lib/wx/c_src/wxe_impl.cpp
index 0ee52e3af2..ef648e008c 100644
--- a/lib/wx/c_src/wxe_impl.cpp
+++ b/lib/wx/c_src/wxe_impl.cpp
@@ -55,8 +55,9 @@ extern ErlDrvCond  * wxe_batch_locker_c;
 extern ErlDrvTermData  init_caller;
 extern int wxe_status;
 
-wxList * wxe_batch = NULL;
-wxList * wxe_batch_cb_saved = NULL;
+wxeFifo * wxe_queue = NULL;
+wxeFifo * wxe_queue_cb_saved = NULL;
+
 int wxe_batch_caller = 0;  // inside batch if larger than 0
 
 /* ************************************************************
@@ -68,30 +69,30 @@ void push_command(int op,char * buf,int len, wxe_data *sd)
 {
   /* fprintf(stderr, "Op %d %d [%ld] %d\r\n", op, (int) driver_caller(sd->port_handle),
      wxe_batch->size(), wxe_batch_caller),fflush(stderr); */
-  wxeCommand *Cmd = new wxeCommand(op, buf, len, sd);
   erl_drv_mutex_lock(wxe_batch_locker_m);
-  wxe_batch->Append(Cmd);
+  wxe_queue->Add(op, buf, len, sd);
 
   if(wxe_batch_caller > 0) {
     // wx-thread is waiting on batch end in cond_wait
     erl_drv_cond_signal(wxe_batch_locker_c);
+    erl_drv_mutex_unlock(wxe_batch_locker_m);
   } else {
     // wx-thread is waiting gui-events
     if(op == WXE_BATCH_BEGIN) {
       wxe_batch_caller = 1;
     }
     erl_drv_cond_signal(wxe_batch_locker_c);
+    erl_drv_mutex_unlock(wxe_batch_locker_m);
     wxWakeUpIdle();
   }
-  erl_drv_mutex_unlock(wxe_batch_locker_m);
+
 }
 
 void meta_command(int what, wxe_data *sd) {
   if(what == PING_PORT) {
     erl_drv_mutex_lock(wxe_batch_locker_m);
     if(wxe_batch_caller > 0) {
-      wxeCommand *Cmd = new wxeCommand(WXE_DEBUG_PING, NULL, 0, sd);
-      wxe_batch->Append(Cmd);
+      wxe_queue->Add(WXE_DEBUG_PING, NULL, 0, sd);
       erl_drv_cond_signal(wxe_batch_locker_c);
     }
     wxWakeUpIdle();
@@ -121,12 +122,12 @@ bool WxeApp::OnInit()
 {
 
   global_me = new wxeMemEnv();
-  wxe_batch = new wxList;
-  wxe_batch_cb_saved = new wxList;
+  wxe_queue = new wxeFifo(1000);
+  wxe_queue_cb_saved = new wxeFifo(200);
   cb_buff = NULL;
   recurse_level = 0;
-  delayed_cleanup = new wxList;
-  delayed_delete  = new wxList;
+  delayed_delete = new wxeFifo(10);
+  delayed_cleanup  = new wxList;
 
   wxe_ps_init2();
   // wxIdleEvent::SetMode(wxIDLE_PROCESS_SPECIFIED); // Hmm printpreview doesn't work in 2.9 with this
@@ -169,6 +170,8 @@ void WxeApp::MacOpenFile(const wxString &filename) {
 
 void WxeApp::shutdown(wxeMetaCommand& Ecmd) {
   ExitMainLoop();
+  delete wxe_queue;
+  delete wxe_queue_cb_saved;
 }
 
 void WxeApp::dummy_close(wxEvent& Ev) {
@@ -201,11 +204,11 @@ void handle_event_callback(ErlDrvPort port, ErlDrvTermData process)
   if(driver_monitor_process(port, process, &monitor) == 0) {
     // Should we be able to handle commands when recursing? probably
     erl_drv_mutex_lock(wxe_batch_locker_m);
-    //fprintf(stderr, "\r\nCB EV Start %lu \r\n", process);fflush(stderr);
+    // fprintf(stderr, "\r\nCB EV Start %lu \r\n", process);fflush(stderr);
     app->recurse_level++;
-    app->dispatch_cb(wxe_batch, wxe_batch_cb_saved, process);
+    app->dispatch_cb(wxe_queue, wxe_queue_cb_saved, process);
     app->recurse_level--;
-    //fprintf(stderr, "CB EV done %lu \r\n", process);fflush(stderr);
+    // fprintf(stderr, "CB EV done %lu \r\n", process);fflush(stderr);
     wxe_batch_caller = 0;
     erl_drv_mutex_unlock(wxe_batch_locker_m);
     driver_demonitor_process(port, &monitor);
@@ -216,22 +219,22 @@ void WxeApp::dispatch_cmds()
 {
   erl_drv_mutex_lock(wxe_batch_locker_m);
   recurse_level++;
-  int level = dispatch(wxe_batch_cb_saved, 0, WXE_STORED);
-  dispatch(wxe_batch, level, WXE_NORMAL);
+  int level = dispatch(wxe_queue_cb_saved, 0, WXE_STORED);
+  dispatch(wxe_queue, level, WXE_NORMAL);
   recurse_level--;
   wxe_batch_caller = 0;
+  if(wxe_queue->m_old) {
+    driver_free(wxe_queue->m_old);
+    wxe_queue->m_old = NULL;
+  }
   erl_drv_mutex_unlock(wxe_batch_locker_m);
   // Cleanup old memenv's and deleted objects
   if(recurse_level == 0) {
-    if(delayed_delete->size() > 0)
-      for( wxList::compatibility_iterator node = delayed_delete->GetFirst();
-	   node;
-	   node = delayed_delete->GetFirst()) {
-	wxeCommand *event = (wxeCommand *)node->GetData();
-	delayed_delete->Erase(node);
-	wxe_dispatch(*event);
-	event->Delete();
-      }
+    wxeCommand *curr;
+    while((curr = delayed_delete->Get()) != NULL) {
+      wxe_dispatch(*curr);
+      curr->Delete();
+    }
     if(delayed_cleanup->size() > 0)
       for( wxList::compatibility_iterator node = delayed_cleanup->GetFirst();
 	   node;
@@ -241,158 +244,145 @@ void WxeApp::dispatch_cmds()
 	destroyMemEnv(*event);
 	delete event;
       }
+    if(wxe_queue_cb_saved->m_old) {
+      driver_free(wxe_queue_cb_saved->m_old);
+      wxe_queue_cb_saved->m_old = NULL;
+    }
+    if(delayed_delete->m_old) {
+      driver_free(delayed_delete->m_old);
+      delayed_delete->m_old = NULL;
+    }
   }
 }
 
 // Should have  erl_drv_mutex_lock(wxe_batch_locker_m);
 // when entering this function and it should be released
 // afterwards
-int WxeApp::dispatch(wxList * batch, int blevel, int list_type)
+int WxeApp::dispatch(wxeFifo * batch, int blevel, int list_type)
 {
   int ping = 0;
   // erl_drv_mutex_lock(wxe_batch_locker_m);  must be locked already
-  while(true)
-    {
-      if (batch->size() > 0) {
-	for( wxList::compatibility_iterator node = batch->GetFirst();
-	     node;
-	     node = batch->GetFirst())
-	  {
-	    wxeCommand *event = (wxeCommand *)node->GetData();
-	    batch->Erase(node);
-	    switch(event->op) {
-	    case WXE_BATCH_END:
-	      {--blevel; }
-	      break;
-	    case WXE_BATCH_BEGIN:
-	      {blevel++; }
-	      break;
-	    case WXE_DEBUG_PING:
-	      // When in debugger we don't want to hang waiting for a BATCH_END
-	      // that never comes, because a breakpoint have hit.
-	      ping++;
-	      if(ping > 2)
-		blevel = 0;
-	      break;
-	    case WXE_CB_RETURN:
-	      // erl_drv_mutex_unlock(wxe_batch_locker_m); should be called after
-	      // whatever cleaning is necessary
-	      if(event->len > 0) {
-		cb_buff = (char *) driver_alloc(event->len);
-		memcpy(cb_buff, event->buffer, event->len);
-	      }
-	      return blevel;
-	    default:
-	      erl_drv_mutex_unlock(wxe_batch_locker_m);
-	      if(event->op < OPENGL_START) {
-		// fprintf(stderr, "  c %d (%d) \r\n", event->op, blevel);
-		wxe_dispatch(*event);
-	      } else {
-		gl_dispatch(event->op,event->buffer,event->caller,event->bin);
-	      }
-	      erl_drv_mutex_lock(wxe_batch_locker_m);
-	      break;
-	    }
-	    event->Delete();
-	  }
-      } else {
-	if((list_type == WXE_STORED) || (blevel <= 0 && list_type == WXE_NORMAL)) {
-	  // erl_drv_mutex_unlock(wxe_batch_locker_m); should be called after
-	  // whatever cleaning is necessary
-	  return blevel;
+  wxeCommand *event;
+  while(true) {
+    while((event = batch->Get()) != NULL) {
+      switch(event->op) {
+      case -1:
+	break;
+      case WXE_BATCH_END:
+	{--blevel; }
+	break;
+      case WXE_BATCH_BEGIN:
+	{blevel++; }
+	break;
+      case WXE_DEBUG_PING:
+	// When in debugger we don't want to hang waiting for a BATCH_END
+	// that never comes, because a breakpoint have hit.
+	ping++;
+	if(ping > 2)
+	  blevel = 0;
+	break;
+      case WXE_CB_RETURN:
+	// erl_drv_mutex_unlock(wxe_batch_locker_m); should be called after
+	// whatever cleaning is necessary
+	if(event->len > 0) {
+	  cb_buff = (char *) driver_alloc(event->len);
+	  memcpy(cb_buff, event->buffer, event->len);
 	}
-	// sleep until something happens
-	//fprintf(stderr, "%s:%d sleep %d %d %d %d \r\n", __FILE__, __LINE__, batch->size(), callback_returned, blevel, is_callback);fflush(stderr);
-	wxe_batch_caller++;
-	while(batch->size() == 0) {
-	  erl_drv_cond_wait(wxe_batch_locker_c, wxe_batch_locker_m);
+	event->Delete();
+	return blevel;
+      default:
+	erl_drv_mutex_unlock(wxe_batch_locker_m);
+	if(event->op < OPENGL_START) {
+	  // fprintf(stderr, "  c %d (%d) \r\n", event->op, blevel);
+	  wxe_dispatch(*event);
+	} else {
+	  gl_dispatch(event->op,event->buffer,event->caller,event->bin);
 	}
+	erl_drv_mutex_lock(wxe_batch_locker_m);
+	break;
       }
+      event->Delete();
+    }
+    if((list_type == WXE_STORED) || (blevel <= 0 && list_type == WXE_NORMAL)) {
+      // erl_drv_mutex_unlock(wxe_batch_locker_m); should be called after
+      // whatever cleaning is necessary
+      return blevel;
     }
+    // sleep until something happens
+    //fprintf(stderr, "%s:%d sleep %d %d\r\n", __FILE__, __LINE__, batch->size(), blevel);fflush(stderr);
+    wxe_batch_caller++;
+    while(batch->m_n == 0) {
+      erl_drv_cond_wait(wxe_batch_locker_c, wxe_batch_locker_m);
+    }
+  }
 }
 
-void WxeApp::dispatch_cb(wxList * batch, wxList * temp, ErlDrvTermData process) {
-  int callback_returned = 0;
+void WxeApp::dispatch_cb(wxeFifo * batch, wxeFifo * temp, ErlDrvTermData process) {
+  wxeCommand *event;
   while(true) {
-    if (batch->size() > 0) {
-      for( wxList::compatibility_iterator node = batch->GetFirst();
-	   node;
-	   node = batch->GetFirst())
-	{
-	  wxeCommand *event = (wxeCommand *)node->GetData();
-	  wxeMemEnv *memenv = getMemEnv(event->port);
-	  batch->Erase(node);
-	  // fprintf(stderr, "  Ev %d %lu\r\n", event->op, event->caller);
-	  if(event->caller == process ||  // Callbacks from CB process only
-	     event->op == WXE_CB_START || // Event callback start change process
-	     event->op == WXE_CB_DIED ||  // Event callback process died
-	     // Allow connect_cb during CB i.e. msg from wxe_server.
-	     (memenv && event->caller == memenv->owner))
-	    {
-	      switch(event->op) {
-	      case WXE_BATCH_END:
-	      case WXE_BATCH_BEGIN:
-	      case WXE_DEBUG_PING:
-		break;
-	      case WXE_CB_RETURN:
-		if(event->len > 0) {
-		  cb_buff = (char *) driver_alloc(event->len);
-		  memcpy(cb_buff, event->buffer, event->len);
-		}  // continue
-	      case WXE_CB_DIED:
-		callback_returned = 1;
-		return;
-	      case WXE_CB_START:
-		// CB start from now accept message from CB process only
-		process = event->caller;
-		break;
-	      default:
-		erl_drv_mutex_unlock(wxe_batch_locker_m);
-		size_t start=temp->GetCount();
-		if(event->op < OPENGL_START) {
-		  // fprintf(stderr, "  cb %d \r\n", event->op);
-		  wxe_dispatch(*event);
-		} else {
-		  gl_dispatch(event->op,event->buffer,event->caller,event->bin);
-		}
-		erl_drv_mutex_lock(wxe_batch_locker_m);
-		if(temp->GetCount() > start) {
-		  // We have recursed dispatch_cb and messages for this
-		  // callback may be saved on temp list move them
-		  // to orig list
-		  for(wxList::compatibility_iterator node = temp->Item(start);
-		      node;
-		      node = node->GetNext()) {
-		    wxeCommand *ev = (wxeCommand *)node->GetData();
-		    if(ev->caller == process) {
-		      batch->Append(ev);
-		      temp->Erase(node);
-		    }
-		  }
-		}
-		if(callback_returned)
-		  return;
-		break;
+    while((event = batch->Get()) != NULL) {
+      wxeMemEnv *memenv = getMemEnv(event->port);
+      // fprintf(stderr, "  Ev %d %lu\r\n", event->op, event->caller);
+      if(event->caller == process ||  // Callbacks from CB process only
+	 event->op == WXE_CB_START || // Event callback start change process
+	 event->op == WXE_CB_DIED ||  // Event callback process died
+	 // Allow connect_cb during CB i.e. msg from wxe_server.
+	 (memenv && event->caller == memenv->owner)) {
+	switch(event->op) {
+	case -1:
+	case WXE_BATCH_END:
+	case WXE_BATCH_BEGIN:
+	case WXE_DEBUG_PING:
+	  break;
+	case WXE_CB_RETURN:
+	  if(event->len > 0) {
+	    cb_buff = (char *) driver_alloc(event->len);
+	    memcpy(cb_buff, event->buffer, event->len);
+	  }  // continue
+	case WXE_CB_DIED:
+	  event->Delete();
+	  return;
+	case WXE_CB_START:
+	  // CB start from now accept message from CB process only
+	  process = event->caller;
+	  break;
+	default:
+	  erl_drv_mutex_unlock(wxe_batch_locker_m);
+	  size_t start=temp->m_n;
+	  if(event->op < OPENGL_START) {
+	    // fprintf(stderr, "  cb %d \r\n", event->op);
+	    wxe_dispatch(*event);
+	  } else {
+	    gl_dispatch(event->op,event->buffer,event->caller,event->bin);
+	  }
+	  erl_drv_mutex_lock(wxe_batch_locker_m);
+	  if(temp->m_n > start) {
+	    // We have recursed dispatch_cb and messages for this
+	    // callback may be saved on temp list move them
+	    // to orig list
+	    for(unsigned int i=start; i < temp->m_n; i++) {
+	      wxeCommand *ev = &temp->m_q[(temp->m_first+i) % temp->m_max];
+	      if(ev->caller == process) {
+		batch->Append(ev);
 	      }
-	      event->Delete();
-	    } else {
-	    // fprintf(stderr, "  save %d \r\n", event->op);
-	    temp->Append(event);
+	    }
 	  }
+	  break;
 	}
-    } else {
-      if(callback_returned) {
-	return;
-      }
-      // sleep until something happens
-      //fprintf(stderr, "%s:%d sleep %d %d %d %d \r\n", __FILE__, __LINE__, batch->size(), callback_returned, blevel, is_callback);fflush(stderr);
-      while(batch->size() == 0) {
-	erl_drv_cond_wait(wxe_batch_locker_c, wxe_batch_locker_m);
+	event->Delete();
+      } else {
+	// fprintf(stderr, "  save %d %lu\r\n", event->op, event->caller);
+	temp->Append(event);
       }
     }
+    // sleep until something happens
+    // fprintf(stderr, "%s:%d sleep %d %d\r\n", __FILE__, __LINE__,
+    //         batch->m_n, temp->m_n);fflush(stderr);
+    while(batch->m_n == 0) {
+      erl_drv_cond_wait(wxe_batch_locker_c, wxe_batch_locker_m);
+    }
   }
 }
-
 /* Memory handling */
 
 void WxeApp::newMemEnv(wxeMetaCommand& Ecmd) {
diff --git a/lib/wx/c_src/wxe_impl.h b/lib/wx/c_src/wxe_impl.h
index 57bf2e2dba..a0a1c84718 100644
--- a/lib/wx/c_src/wxe_impl.h
+++ b/lib/wx/c_src/wxe_impl.h
@@ -60,8 +60,8 @@ public:
 #endif
   void shutdown(wxeMetaCommand& event);
 
-  int dispatch(wxList *, int, int);
-  void dispatch_cb(wxList * batch, wxList * temp, ErlDrvTermData process);
+  int dispatch(wxeFifo *, int, int);
+  void dispatch_cb(wxeFifo * batch, wxeFifo * temp, ErlDrvTermData process);
 
   void wxe_dispatch(wxeCommand& event);
 
@@ -93,7 +93,7 @@ public:
 
   int recurse_level;
   wxList * delayed_cleanup;
-  wxList * delayed_delete;
+  wxeFifo * delayed_delete;
   // Temp container for callbacks
   char *cb_buff;
   int  cb_len;