[GNUnet-SVN] r16523 - gnunet-gtk/src/lib

[gnunet]

Author: grothoff
Date: 2011-08-15 14:30:49 +0200 (Mon, 15 Aug 2011)
New Revision: 16523

Modified:
   gnunet-gtk/src/lib/eventloop.c
Log:
some code cleanup

Modified: gnunet-gtk/src/lib/eventloop.c
===================================================================
--- gnunet-gtk/src/lib/eventloop.c      2011-08-15 12:23:08 UTC (rev 16522)
+++ gnunet-gtk/src/lib/eventloop.c      2011-08-15 12:30:49 UTC (rev 16523)
@@ -26,6 +26,14 @@
 #include "gnunet_gtk.h"
 
 
+/** 
+ * Initial size of our poll array cache.
+ *
+ * TODO: get some statistics, find the maximum number of fds ever
+ * polled during normal gnunet-gtk operation, and set this to that number. 
+ */
+#define INITIAL_POLL_ARRAY_SIZE 30
+
 /**
  * Main context for our event loop.
  */
@@ -92,7 +100,6 @@
    */
   gint max_priority;
 
-
 #if WINDOWS
   /**
    * Array to hold pipe handles during a select() call
@@ -206,6 +213,21 @@
 }
 
 
+/**
+ * Change the size of the cached poll array to the given value.
+ *
+ * @param ml main loop context with the cached poll array
+ * @param new_size desired size of the cached poll array
+ */
+static void
+resize_cached_poll_array (struct GNUNET_GTK_MainLoop *ml,
+                         guint new_size)
+{
+  ml->cached_poll_array = g_new (GPollFD, new_size);
+  ml->cached_poll_array_size = new_size;
+}
+
+
 #ifndef FD_COPY
 #define FD_COPY(s, d) (memcpy ((d), (s), sizeof (fd_set)))
 #endif
@@ -234,11 +256,9 @@
   struct GNUNET_GTK_MainLoop *ml = cls;
   int max_nfds;
   gint poll_result;
-  GPollFD *gfds;
   gint delay;
   guint i;
   guint fd_counter = 0;
-  guint allocated_nfds;
   guint need_gfds;
   fd_set aread;
   fd_set awrite;
@@ -292,24 +312,17 @@
   if (efds != NULL)
     max_nfds = GNUNET_MAX (max_nfds, efds->nsds);
 
-  allocated_nfds = ml->cached_poll_array_size;
-  gfds = ml->cached_poll_array;
-  if (allocated_nfds == 0)
-  {
-    /* TODO: get some statistics, find the maximum number of fds ever
-     * polled during normal gnunet-gtk operation, and set this to that number.
-     */
-    ml->cached_poll_array = gfds = g_new (GPollFD, 30);
-    ml->cached_poll_array_size = allocated_nfds = 30;
-  }
+  ml->cached_poll_array_size = ml->cached_poll_array_size;
+  if (ml->cached_poll_array_size == 0)
+    resize_cached_poll_array (ml, INITIAL_POLL_ARRAY_SIZE);
 
   while (1)
-  {
-    fd_counter = 0;
+    {
+      fd_counter = 0;
 #if !WINDOWS
-    gboolean need_realloc = FALSE;
-    for (i = 0; !need_realloc && i < max_nfds; i += 1)
-    {
+      gboolean need_realloc = FALSE;
+      for (i = 0; !need_realloc && i < max_nfds; i += 1)
+       {
       int isset[3];
      
       isset[0] = (rfds == NULL) ? 0 : FD_ISSET (i, &rfds->sds);
@@ -317,23 +330,22 @@
       isset[2] = (efds == NULL) ? 0 : FD_ISSET (i, &efds->sds);
       if (!isset[0] && !isset[1] && !isset[2])
         continue;
-      if (fd_counter >= allocated_nfds)
+      if (fd_counter >= ml->cached_poll_array_size)
       {
         need_realloc = TRUE;
         break;
       }
-      gfds[fd_counter].fd = i;
-      gfds[fd_counter].events = (isset[0] ? G_IO_IN | G_IO_HUP | G_IO_ERR : 0)
+      ml->cached_poll_array[fd_counter].fd = i;
+      ml->cached_poll_array[fd_counter].events = (isset[0] ? G_IO_IN | 
G_IO_HUP | G_IO_ERR : 0)
        | (isset[1] ? G_IO_OUT | G_IO_ERR : 0) | (isset[2] ? G_IO_ERR : 0);
       fd_counter += 1;
     }
     if (need_realloc)
-    {
-      ml->cached_poll_array = gfds = g_renew (GPollFD, gfds, 
ml->cached_poll_array_size * 2);
-      ml->cached_poll_array_size = allocated_nfds = ml->cached_poll_array_size 
* 2;
-      fd_counter = 0;
-      need_realloc = FALSE;
-    }
+      {
+       resize_cached_poll_array (ml, ml->cached_poll_array_size * 2);
+       fd_counter = 0;
+       need_realloc = FALSE;
+      }
     else
       break;  
 #else
@@ -343,13 +355,13 @@
         + (rfds == NULL ? 0 : GNUNET_CONTAINER_slist_count (rfds->handles))
         + (wfds == NULL ? 0 : 1)
         + 1;
-    if (need_nfds >= allocated_nfds)
+    if (need_nfds >= ml->cached_poll_array_size)
     {
       /* Since there are also gmainloop's own fds, just need_nfds won't be
        * enough, so make it twice as long.
        */
-      ml->cached_poll_array = gfds = g_renew (GPollFD, gfds, need_nfds * 2);
-      ml->cached_poll_array_size = allocated_nfds = need_nfds * 2;
+      ml->cached_poll_array = ml->cached_poll_array = g_renew (GPollFD, 
ml->cached_poll_array, need_nfds * 2);
+      ml->cached_poll_array_size = ml->cached_poll_array_size = need_nfds * 2;
     }
     if (ml->read_array_length < GNUNET_CONTAINER_slist_count (rfds->handles))
     {
@@ -374,20 +386,20 @@
 #if DEBUG_NETWORK
               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding the pipe's 0x%x 
overlapped event to the array as %d\n", fh->h, nhandles);
 #endif
-              gfds[fd_counter].fd = (intptr_t) fh->oOverlapRead->hEvent;
+              ml->cached_poll_array[fd_counter].fd = (intptr_t) 
fh->oOverlapRead->hEvent;
               /* On W32 .events makes no sense - g_poll will just OR its
                * contents into .revents when the .fd event fires.
                * So we'll use it in the way that suits us the best.
                */
-              gfds[fd_counter].events = G_IO_IN;
+              ml->cached_poll_array[fd_counter].events = G_IO_IN;
               fd_counter += 1;
               ml->read_array[read_handles] = fh;
               read_handles += 1;
             }
             else
             {
-              gfds[fd_counter].fd = (intptr_t) ml->hEventReadReady;
-              gfds[fd_counter].events = G_IO_HUP;
+              ml->cached_poll_array[fd_counter].fd = (intptr_t) 
ml->hEventReadReady;
+              ml->cached_poll_array[fd_counter].events = G_IO_HUP;
               fd_counter += 1;
               ml->read_array[read_handles] = fh;
               read_handles += 1;
@@ -398,8 +410,8 @@
 #if DEBUG_NETWORK
             GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding the read ready event 
to the array as %d\n", nhandles);
 #endif
-            gfds[fd_counter].fd = (intptr_t) ml->hEventReadReady;
-            gfds[fd_counter].events = G_IO_IN;
+            ml->cached_poll_array[fd_counter].fd = (intptr_t) 
ml->hEventReadReady;
+            ml->cached_poll_array[fd_counter].events = G_IO_IN;
             fd_counter += 1;
             ml->read_array[read_handles] = fh;
             read_handles += 1;
@@ -416,8 +428,8 @@
     }
     if (wfds != NULL && GNUNET_CONTAINER_slist_count (wfds->handles) > 0)
     {
-      gfds[fd_counter].fd = (intptr_t) ml->hEventPipeWrite;
-      gfds[fd_counter].events = G_IO_OUT;
+      ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventPipeWrite;
+      ml->cached_poll_array[fd_counter].events = G_IO_OUT;
       always_ready_write_fd = fd_counter;
       fd_counter += 1;
     }
@@ -449,8 +461,8 @@
 #if DEBUG_NETWORK
       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding the socket read event to 
the array as %d\n", fd_counter);
 #endif
-      gfds[fd_counter].fd = (intptr_t) ml->hEventRead;
-      gfds[fd_counter].events = G_IO_IN;
+      ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventRead;
+      ml->cached_poll_array[fd_counter].events = G_IO_IN;
       for (i = 0; i < rfds->sds.fd_count; i++)
         WSAEventSelect (rfds->sds.fd_array[i], ml->hEventRead, FD_ACCEPT | 
FD_READ | FD_CLOSE);
       fd_counter += 1;
@@ -462,8 +474,8 @@
 #if DEBUG_NETWORK
       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding the socket write event to 
the array as %d\n", fd_counter);
 #endif
-      gfds[fd_counter].fd = (intptr_t) ml->hEventWrite;
-      gfds[fd_counter].events = G_IO_OUT;
+      ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventWrite;
+      ml->cached_poll_array[fd_counter].events = G_IO_OUT;
       for (i = 0; i < wfds->sds.fd_count; i++)
       {
         DWORD error;
@@ -487,8 +499,8 @@
 #if DEBUG_NETWORK
       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding the socket error event to 
the array as %d\n", fd_counter);
 #endif
-      gfds[fd_counter].fd = (intptr_t) ml->hEventException;
-      gfds[fd_counter].events = G_IO_ERR;
+      ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventException;
+      ml->cached_poll_array[fd_counter].events = G_IO_ERR;
       for (i = 0; i < efds->sds.fd_count; i++)
         WSAEventSelect (efds->sds.fd_array[i], ml->hEventException, FD_OOB | 
FD_CLOSE);
       fd_counter += 1;
@@ -500,12 +512,11 @@
   socks = sock_read + sock_write + sock_err;
 
   g_main_context_prepare (ml->gmc, &ml->max_priority);
-  while (allocated_nfds < (need_gfds = g_main_context_query (ml->gmc,
-      ml->max_priority, &delay, &gfds[fd_counter], allocated_nfds - 
fd_counter)))
-  {
-    ml->cached_poll_array = gfds = g_renew (GPollFD, gfds, allocated_nfds - 
fd_counter + need_gfds);
-    ml->cached_poll_array_size = allocated_nfds = allocated_nfds - fd_counter 
+ need_gfds;
-  }
+  while (ml->cached_poll_array_size < (need_gfds = g_main_context_query 
(ml->gmc,
+      ml->max_priority, &delay, &ml->cached_poll_array[fd_counter], 
ml->cached_poll_array_size - fd_counter)))
+    resize_cached_poll_array (ml,
+                             ml->cached_poll_array_size - fd_counter + 
need_gfds);
+
   ml->poll_array_active = fd_counter + need_gfds;
 
   if (timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
@@ -528,7 +539,7 @@
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "We have %d of our FDs and %d of GMC 
ones, going to wait %6dms\n", fd_counter, need_gfds, delay);
 #endif
 
-  poll_result = g_poll (gfds, fd_counter + need_gfds, delay);
+  poll_result = g_poll (ml->cached_poll_array, fd_counter + need_gfds, delay);
 
 #if DEBUG_NETWORK
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "g_poll returned : %d\n", poll_result);
@@ -539,7 +550,7 @@
    * from within a task (currently we're not in a task, but in a select() 
call, remember)
    * Startup reason is used to pass the scheduler sanity check.
    */
-  if (TRUE == g_main_context_check (ml->gmc, ml->max_priority, 
&gfds[fd_counter], need_gfds))
+  if (TRUE == g_main_context_check (ml->gmc, ml->max_priority, 
&ml->cached_poll_array[fd_counter], need_gfds))
     GNUNET_SCHEDULER_add_continuation (gnunet_gtk_dispatch_task, ml,
                                       GNUNET_SCHEDULER_REASON_STARTUP);
 
@@ -553,12 +564,12 @@
   for (i = 0; i < fd_counter; i++)
   {
     int set[3];
-    if ((set[0] = FD_ISSET (gfds[i].fd, &aread)))
-      FD_SET (gfds[i].fd, &rfds->sds);
-    if ((set[1] = FD_ISSET (gfds[i].fd, &awrite)))
-      FD_SET (gfds[i].fd, &wfds->sds);
-    if ((set[2] = FD_ISSET (gfds[i].fd, &aexcept)))
-      FD_SET (gfds[i].fd, &efds->sds);
+    if ((set[0] = FD_ISSET (ml->cached_poll_array[i].fd, &aread)))
+      FD_SET (ml->cached_poll_array[i].fd, &rfds->sds);
+    if ((set[1] = FD_ISSET (ml->cached_poll_array[i].fd, &awrite)))
+      FD_SET (ml->cached_poll_array[i].fd, &wfds->sds);
+    if ((set[2] = FD_ISSET (ml->cached_poll_array[i].fd, &aexcept)))
+      FD_SET (ml->cached_poll_array[i].fd, &efds->sds);
     if (set[0] || set[1] || set[2])
       result += 1;
   }
@@ -575,7 +586,7 @@
     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "select() returned %d\n", select_ret);
 #endif
   }
-  if (always_ready_write_fd >= 0 && gfds[always_ready_write_fd].revents & 
G_IO_OUT)
+  if (always_ready_write_fd >= 0 && 
ml->cached_poll_array[always_ready_write_fd].revents & G_IO_OUT)
   {
     GNUNET_CONTAINER_slist_append (ml->handles_write, wfds->handles);
     result += GNUNET_CONTAINER_slist_count (ml->handles_write);
@@ -587,7 +598,7 @@
   {
     DWORD error;
     BOOL bret;
-    if (!(gfds[i].revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)))
+    if (!(ml->cached_poll_array[i].revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)))
       continue;
     SetLastError (0);
     waitstatus = 0;
@@ -596,7 +607,7 @@
 #if DEBUG_NETWORK
     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Peek at read pipe %d (0x%x) returned 
%d (%d bytes available) GLE %u\n", i, ml->read_array[i]->h, bret, waitstatus, 
error);
 #endif
-    if (bret == 0 || (gfds[i].revents & G_IO_ERR))
+    if (bret == 0 || (ml->cached_poll_array[i].revents & G_IO_ERR))
     {
       if (efds != NULL)
       {