Now only saving channels.conf after a modification made by the user

HISTORY

@@ -3029,3 +3029,7 @@ Video Disk Recorder Revision History
 - If one PID can't be added, the whole cDevice::AttachReceiver() will now fail
   and all PIDs added so far will be deleted (thanks to Marco Schl<68><6C>ler for
   pointing out this one).
+- Now only saving channels.conf after a modification made by the user (avoids
+  lots of disk access due to automatic channel updates). Automatic channel
+  modifications will be saved every 10 minutes if no recording is currently
+  active.

channels.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: channels.c 1.25 2004/04/03 13:42:06 kls Exp $
+ * $Id: channels.c 1.26 2004/10/17 11:21:39 kls Exp $
  */
 
 #include "channels.h"
@@ -749,7 +749,7 @@ cChannels Channels;
 cChannels::cChannels(void)
 {
   maxNumber = 0;
-  modified = false;
+  modified = CHANNELSMOD_NONE;
 }
 
 bool cChannels::Load(const char *FileName, bool AllowComments, bool MustExist)
@@ -863,15 +863,15 @@ bool cChannels::SwitchTo(int Number)
   return channel && cDevice::PrimaryDevice()->SwitchChannel(channel, true);
 }
 
-void cChannels::SetModified(void)
+void cChannels::SetModified(bool ByUser)
 {
-  modified = true;
+  modified = ByUser ? CHANNELSMOD_USER : !modified ? CHANNELSMOD_AUTO : modified;
 }
 
-bool cChannels::Modified(void)
+int cChannels::Modified(void)
 {
-  bool Result = modified;
-  modified = false;
+  int Result = modified;
+  modified = CHANNELSMOD_NONE;
   return Result;
 }
 

channels.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: channels.h 1.17 2004/04/03 13:40:47 kls Exp $
+ * $Id: channels.h 1.18 2004/10/17 10:33:38 kls Exp $
  */
 
 #ifndef __CHANNELS_H
@@ -26,6 +26,10 @@
 #define CHANNELMOD_TRANSP   0x20
 #define CHANNELMOD_RETUNE   (CHANNELMOD_PIDS | CHANNELMOD_CA | CHANNELMOD_TRANSP)
 
+#define CHANNELSMOD_NONE    0
+#define CHANNELSMOD_AUTO    1
+#define CHANNELSMOD_USER    2
+
 #define MAXAPIDS 32
 #define MAXCAIDS  8
 
@@ -178,7 +182,7 @@ public:
 class cChannels : public cRwLock, public cConfig<cChannel> {
 private:
   int maxNumber;
-  bool modified;
+  int modified;
   int beingEdited;
 public:
   cChannels(void);
@@ -196,8 +200,11 @@ public:
   bool HasUniqueChannelID(cChannel *NewChannel, cChannel *OldChannel = NULL);
   bool SwitchTo(int Number);
   int MaxNumber(void) { return maxNumber; }
-  void SetModified(void);
-  bool Modified(void);
+  void SetModified(bool ByUser = false);
+  int Modified(void);
+      ///< Returns 0 if no channels have been modified, 1 if an automatic
+      ///< modification has been made, and 2 if the user has made a modification.
+      ///< Calling this function resets the 'modified' flag to 0.
   cChannel *NewChannel(const cChannel *Transponder, const char *Name, int Nid, int Tid, int Sid, int Rid = 0);
   };
 

menu.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: menu.c 1.313 2004/10/16 16:10:42 kls Exp $
+ * $Id: menu.c 1.314 2004/10/17 10:28:27 kls Exp $
  */
 
 #include "menu.h"
@@ -308,7 +308,7 @@ eOSState cMenuEditChannel::ProcessKey(eKeys Key)
               isyslog("added channel %d %s", channel->Number(), data.ToText());
               state = osUser1;
               }
-           Channels.SetModified();
+           Channels.SetModified(true);
            }
         else {
            Skins.Message(mtError, tr("Channel settings are not unique!"));
@@ -396,7 +396,7 @@ void cMenuChannels::Propagate(void)
   for (cMenuChannelItem *ci = (cMenuChannelItem *)First(); ci; ci = (cMenuChannelItem *)ci->Next())
       ci->Set();
   Display();
-  Channels.SetModified();
+  Channels.SetModified(true);
 }
 
 eOSState cMenuChannels::Switch(void)

svdrp.c

@@ -10,7 +10,7 @@
  * and interact with the Video Disk Recorder - or write a full featured
  * graphical interface that sits on top of an SVDRP connection.
  *
- * $Id: svdrp.c 1.63 2004/06/13 13:38:38 kls Exp $
+ * $Id: svdrp.c 1.64 2004/10/17 10:28:47 kls Exp $
  */
 
 #include "svdrp.h"
@@ -484,7 +484,7 @@ void cSVDRP::CmdDELC(const char *Option)
                }
            Channels.Del(channel);
            Channels.ReNumber();
-           Channels.SetModified();
+           Channels.SetModified(true);
            isyslog("channel %s deleted", Option);
            Reply(250, "Channel \"%s\" deleted", Option);
            }
@@ -876,7 +876,7 @@ void cSVDRP::CmdMODC(const char *Option)
               if (Channels.HasUniqueChannelID(&ch, channel)) {
                  *channel = ch;
                  Channels.ReNumber();
-                 Channels.SetModified();
+                 Channels.SetModified(true);
                  isyslog("modifed channel %d %s", channel->Number(), channel->ToText());
                  Reply(250, "%d %s", channel->Number(), channel->ToText());
                  }
@@ -951,7 +951,7 @@ void cSVDRP::CmdNEWC(const char *Option)
            *channel = ch;
            Channels.Add(channel);
            Channels.ReNumber();
-           Channels.SetModified();
+           Channels.SetModified(true);
            isyslog("new channel %d %s", channel->Number(), channel->ToText());
            Reply(250, "%d %s", channel->Number(), channel->ToText());
            }

vdr.c

@@ -22,7 +22,7 @@
  *
  * The project's page is at http://www.cadsoft.de/vdr
  *
- * $Id: vdr.c 1.186 2004/10/10 12:47:56 kls Exp $
+ * $Id: vdr.c 1.187 2004/10/17 11:50:21 kls Exp $
  */
 
 #include <getopt.h>
@@ -58,10 +58,11 @@
 #include "transfer.h"
 #include "videodir.h"
 
-#define MINCHANNELWAIT  10 // seconds to wait between failed channel switchings
-#define ACTIVITYTIMEOUT 60 // seconds before starting housekeeping
-#define SHUTDOWNWAIT   300 // seconds to wait in user prompt before automatic shutdown
-#define MANUALSTART    600 // seconds the next timer must be in the future to assume manual start
+#define MINCHANNELWAIT     10 // seconds to wait between failed channel switchings
+#define ACTIVITYTIMEOUT    60 // seconds before starting housekeeping
+#define SHUTDOWNWAIT      300 // seconds to wait in user prompt before automatic shutdown
+#define MANUALSTART       600 // seconds the next timer must be in the future to assume manual start
+#define CHANNELSAVEDELTA  600 // seconds before saving channels.conf after automatic modifications
 
 static int Interrupted = 0;
 
@@ -546,10 +547,20 @@ int main(int argc, char *argv[])
               }
            }
         // Handle channel modifications:
-        if (!Channels.BeingEdited() && Channels.Modified()) {
-           if (Channels.Lock(false, 100)) {
-              Channels.Save(); //XXX only after user changes???
-              Timers.Save();
+        if (!Channels.BeingEdited()) {
+           int modified = Channels.Modified();
+           static time_t ChannelSaveTimeout = 0;
+           if (modified == CHANNELSMOD_USER)
+              ChannelSaveTimeout = 1; // triggers an immediate save
+           else if (modified && !ChannelSaveTimeout)
+              ChannelSaveTimeout = time(NULL) + CHANNELSAVEDELTA;
+           bool timeout = ChannelSaveTimeout == 1 || ChannelSaveTimeout && time(NULL) > ChannelSaveTimeout && !cRecordControls::Active();
+           if ((modified || timeout) && Channels.Lock(false, 100)) {
+              if (timeout) {
+                 Channels.Save();
+                 Timers.Save();
+                 ChannelSaveTimeout = 0;
+                 }
               for (cChannel *Channel = Channels.First(); Channel; Channel = Channels.Next(Channel)) {
                   if (Channel->Modification(CHANNELMOD_RETUNE)) {
                      cRecordControls::ChannelDataModified(Channel);