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-rw-r--r--src/StateFile.cxx33
-rw-r--r--src/StateFile.hxx12
2 files changed, 33 insertions, 12 deletions
diff --git a/src/StateFile.cxx b/src/StateFile.cxx
index a15eb7220..301ae9abb 100644
--- a/src/StateFile.cxx
+++ b/src/StateFile.cxx
@@ -45,6 +45,24 @@ StateFile::StateFile(Path &&_path, const char *_path_utf8,
}
void
+StateFile::RememberVersions()
+{
+ prev_volume_version = sw_volume_state_get_hash();
+ prev_output_version = audio_output_state_get_version();
+ prev_playlist_version = playlist_state_get_hash(&partition.playlist,
+ &partition.pc);
+}
+
+bool
+StateFile::IsModified() const
+{
+ return prev_volume_version != sw_volume_state_get_hash() ||
+ prev_output_version != audio_output_state_get_version() ||
+ prev_playlist_version != playlist_state_get_hash(&partition.playlist,
+ &partition.pc);
+}
+
+void
StateFile::Write()
{
g_debug("Saving state file %s", path_utf8.c_str());
@@ -62,10 +80,7 @@ StateFile::Write()
fclose(fp);
- prev_volume_version = sw_volume_state_get_hash();
- prev_output_version = audio_output_state_get_version();
- prev_playlist_version = playlist_state_get_hash(&partition.playlist,
- &partition.pc);
+ RememberVersions();
}
void
@@ -92,19 +107,13 @@ StateFile::Read()
g_warning("Unrecognized line in state file: %s", line);
}
- prev_volume_version = sw_volume_state_get_hash();
- prev_output_version = audio_output_state_get_version();
- prev_playlist_version = playlist_state_get_hash(&partition.playlist,
- &partition.pc);
+ RememberVersions();
}
inline void
StateFile::AutoWrite()
{
- if (prev_volume_version == sw_volume_state_get_hash() &&
- prev_output_version == audio_output_state_get_version() &&
- prev_playlist_version == playlist_state_get_hash(&partition.playlist,
- &partition.pc))
+ if (!IsModified())
/* nothing has changed - don't save the state file,
don't spin up the hard disk */
return;
diff --git a/src/StateFile.hxx b/src/StateFile.hxx
index a81b8d91f..7d57d5422 100644
--- a/src/StateFile.hxx
+++ b/src/StateFile.hxx
@@ -49,6 +49,18 @@ public:
void Write();
private:
+ /**
+ * Save the current state versions for use with IsModified().
+ */
+ void RememberVersions();
+
+ /**
+ * Check if MPD's state was modified since the last
+ * RememberVersions() call.
+ */
+ gcc_pure
+ bool IsModified() const;
+
void AutoWrite();
/* virtual methods from TimeoutMonitor */