From d22b8b5ed0868adf21a6b96a8f119dda5b96c25a Mon Sep 17 00:00:00 2001
From: Jay Sorg <jay.sorg@gmail.com>
Date: Sat, 7 Sep 2013 23:54:36 -0700
Subject: [PATCH] chansrv: added timeout callback

---
 sesman/chansrv/chansrv.c | 139 +++++++++++++++++++++++++++++++++++++++
 sesman/chansrv/chansrv.h |   5 +-
 2 files changed, 142 insertions(+), 2 deletions(-)

diff --git a/sesman/chansrv/chansrv.c b/sesman/chansrv/chansrv.c
index d81c488d..c3d1aa79 100644
--- a/sesman/chansrv/chansrv.c
+++ b/sesman/chansrv/chansrv.c
@@ -76,6 +76,143 @@ int g_exec_pid = 0;
 /* this variable gets bumped up once per DVC we create       */
 tui32 g_dvc_chan_id = 100;
 
+struct timeout_obj
+{
+  tui32 mstime;
+  void* data;
+  void (*callback)(void* data);
+  struct timeout_obj* next;
+};
+
+static struct timeout_obj *g_timeout_head = 0;
+static struct timeout_obj *g_timeout_tail = 0;
+
+/*****************************************************************************/
+int APP_CC
+add_timeout(int msoffset, void (*callback)(void *data), void *data)
+{
+    struct timeout_obj *tobj;
+    tui32 now;
+
+    LOG(10, ("add_timeout:"));
+    now = g_time3();
+    tobj = g_malloc(sizeof(struct timeout_obj), 1);
+    tobj->mstime = now + msoffset;
+    tobj->callback = callback;
+    tobj->data = data;
+    if (g_timeout_tail == 0)
+    {
+        g_timeout_head = tobj;
+        g_timeout_tail = tobj;
+    }
+    else
+    {
+        g_timeout_tail->next = tobj;
+        g_timeout_tail = tobj;
+    }
+    return 0;
+}
+
+/*****************************************************************************/
+static int APP_CC
+get_timeout(int *timeout)
+{
+    struct timeout_obj *tobj;
+    tui32 now;
+    int ltimeout;
+
+    LOG(10, ("get_timeout:"));
+    ltimeout = *timeout;
+    if (ltimeout < 1)
+    {
+        ltimeout = 0;
+    }
+    tobj = g_timeout_head;
+    if (tobj != 0)
+    {
+        now = g_time3();
+        while (tobj != 0)
+        {
+            LOG(10, ("  now %u tobj->mstime %u", now, tobj->mstime));
+            if (now < tobj->mstime)
+            {
+                ltimeout = tobj->mstime - now;
+            }
+            tobj = tobj->next;
+        }
+    }
+    if (ltimeout > 0)
+    {
+        LOG(10, ("  ltimeout %d", ltimeout));
+        if (*timeout < 1)
+        {
+            *timeout = ltimeout;
+        }
+        else
+        {
+            if (*timeout > ltimeout)
+            {
+                *timeout = ltimeout;
+            }
+        }
+    }
+    return 0;
+}
+
+/*****************************************************************************/
+static int APP_CC
+check_timeout(void)
+{
+    struct timeout_obj *tobj;
+    struct timeout_obj *last_tobj;
+    struct timeout_obj *temp_tobj;
+    int count;
+    tui32 now;
+
+    LOG(10, ("check_timeout:"));
+    count = 0;
+    tobj = g_timeout_head;
+    if (tobj != 0)
+    {
+        last_tobj = 0;
+        while (tobj != 0)
+        {
+            count++;
+            now = g_time3();
+            if (now >= tobj->mstime)
+            {
+                tobj->callback(tobj->data);
+                if (last_tobj == 0)
+                {
+                    g_timeout_head = tobj->next;
+                    if (g_timeout_head == 0)
+                    {
+                        g_timeout_tail = 0;
+                    }
+                }
+                else
+                {
+                    last_tobj->next = tobj->next;
+                    if (g_timeout_tail == tobj)
+                    {
+                        g_timeout_tail = last_tobj;
+                    }
+                }
+                temp_tobj = tobj;
+                tobj = tobj->next;
+                g_free(temp_tobj);
+            }
+            else
+            {
+                last_tobj = tobj;
+                tobj = tobj->next;
+            }
+        }
+    }
+    LOG(10, ("  count %d", count));
+    return 0;
+}
+
 /*****************************************************************************/
 int DEFAULT_CC
 g_is_term(void)
@@ -925,6 +1062,7 @@ channel_thread_loop(void *in_val)
 
         while (g_obj_wait(objs, num_objs, 0, 0, timeout) == 0)
         {
+            check_timeout();
             if (g_is_wait_obj_set(g_term_event))
             {
                 LOGM((LOG_LEVEL_INFO, "channel_thread_loop: g_term_event set"));
@@ -1007,6 +1145,7 @@ channel_thread_loop(void *in_val)
             sound_get_wait_objs(objs, &num_objs, &timeout);
             dev_redir_get_wait_objs(objs, &num_objs, &timeout);
             xfuse_get_wait_objs(objs, &num_objs, &timeout);
+            get_timeout(&timeout);
         } /* end while (g_obj_wait(objs, num_objs, 0, 0, timeout) == 0) */
     }
 
diff --git a/sesman/chansrv/chansrv.h b/sesman/chansrv/chansrv.h
index 12162dd1..06ecdc07 100644
--- a/sesman/chansrv/chansrv.h
+++ b/sesman/chansrv/chansrv.h
@@ -1,8 +1,8 @@
 /**
  * xrdp: A Remote Desktop Protocol server.
  *
- * Copyright (C) Jay Sorg 2009-2012
- * Copyright (C) Laxmikant Rashinkar 2009-2012
+ * Copyright (C) Jay Sorg 2009-2013
+ * Copyright (C) Laxmikant Rashinkar 2009-2013
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -59,6 +59,7 @@ g_is_term(void);
 
 int APP_CC send_channel_data(int chan_id, char *data, int size);
 int APP_CC main_cleanup(void);
+int APP_CC add_timeout(int msoffset, void (*callback)(void* data), void* data);
 int APP_CC find_empty_slot_in_dvc_channels();
 struct xrdp_api_data * APP_CC struct_from_dvc_chan_id(tui32 dvc_chan_id);
 int remove_struct_with_chan_id(tui32 dvc_chan_id);