Added throttle_interval option and backend.

git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@481 e378c898-3ddf-0310-93e7-cc216c733640

doc/rtorrent.1.xml

@@ -425,6 +425,16 @@
         </para></listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term>throttle_interval = <replaceable>ms</replaceable></term>
+        <listitem><para>
+          Interval between throttle ticks in milli-seconds, must be
+          between <emphasis>1-5000</emphasis> and defaults to
+          <emphasis>1000</emphasis>. Shorter intervals will cause less
+          bandwidth usage spikes while requiring more CPU resources.
+        </para></listitem>
+      </varlistentry>
+
       <varlistentry>
         <term>tracker_dump = <replaceable>yes | no</replaceable></term>
         <listitem><para>

doc/rtorrent.rc

@@ -58,3 +58,7 @@
 
 # Dump data received from trackers to the files "./tracker_dump.<time>".
 #tracker_dump = no
+
+# Change the interval between each throttle tick, in milliseconds. In
+# the range 1-5000 ms.
+#throttle_interval = 1000

src/main.cc

@@ -134,6 +134,8 @@ initialize_option_handler(ui::Control* c, OptionHandler* optionHandler) {
 
   optionHandler->insert("hash_read_ahead",   new OptionHandlerInt(c, &apply_hash_read_ahead, &validate_read_ahead));
   optionHandler->insert("max_open_files",    new OptionHandlerInt(c, &apply_max_open_files, &validate_fd));
+  optionHandler->insert("throttle_interval", new OptionHandlerInt(c, &apply_throttle_interval, &validate_throttle_interval));
+
   optionHandler->insert("session",           new OptionHandlerString(c, &apply_session_directory, &validate_directory));
   optionHandler->insert("tracker_dump",      new OptionHandlerString(c, &apply_tracker_dump, &validate_yes_no));
 }

src/option_handler_rules.cc

@@ -80,6 +80,11 @@ validate_fd(int arg) {
   return arg >= 10 && arg < (1 << 16);
 }
 
+bool
+validate_throttle_interval(int arg) {
+  return arg > 0 && arg < 5000;
+}
+
 void
 apply_download_min_peers(ui::Control* m, int arg) {
   m->get_core().get_download_list().slot_map_insert().insert("1_min_peers", sigc::bind(sigc::mem_fun(&core::Download::call<void, uint32_t, &torrent::Download::set_peers_min>), arg));
@@ -123,6 +128,11 @@ apply_max_open_files(ui::Control* m, int arg) {
   torrent::set_max_open_files(arg);
 }
 
+void
+apply_throttle_interval(ui::Control* m, int arg) {
+  torrent::set_throttle_interval(arg * 1000);
+}
+
 void
 apply_bind(ui::Control* m, const std::string& arg) {
   torrent::set_bind(arg);

src/option_handler_rules.h

@@ -44,6 +44,8 @@ bool validate_rate(int arg);
 bool validate_read_ahead(int arg);
 bool validate_fd(int arg);
 
+bool validate_throttle_interval(int arg);
+
 void apply_download_min_peers(ui::Control* m, int arg);
 void apply_download_max_peers(ui::Control* m, int arg);
 void apply_download_max_uploads(ui::Control* m, int arg);
@@ -55,6 +57,7 @@ void apply_global_upload_rate(ui::Control* m, int arg);
 
 void apply_hash_read_ahead(ui::Control* m, int arg);
 void apply_max_open_files(ui::Control* m, int arg);
+void apply_throttle_interval(ui::Control* m, int arg);
 
 void apply_ip(ui::Control* m, const std::string& arg);
 void apply_bind(ui::Control* m, const std::string& arg);