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| author | Max Kellermann <max@duempel.org> | 2009-10-08 15:22:39 +0200 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2009-10-08 15:22:39 +0200 |
| commit | ecb118f1edab572a904890eddafd3b11c0a79a79 (patch) | |
| tree | 4e273cd64778fcff80250b3b33ffb050a257c981 /src/output | |
| parent | 1e663b186998ffdeef9b3b9775558e9378bad342 (diff) | |
| download | mpd-ecb118f1edab572a904890eddafd3b11c0a79a79.tar.gz mpd-ecb118f1edab572a904890eddafd3b11c0a79a79.tar.xz mpd-ecb118f1edab572a904890eddafd3b11c0a79a79.zip | |
state_file: save only if something has changed
If nothing has changed since the last save, don't save the state
file. Saving will spin up the hard drive, which is undesirable on
hosts where MPD is idling in background.
Diffstat (limited to '')
| -rw-r--r-- | src/output_command.c | 6 | ||||
| -rw-r--r-- | src/output_state.c | 8 | ||||
| -rw-r--r-- | src/output_state.h | 8 |
3 files changed, 22 insertions, 0 deletions
diff --git a/src/output_command.c b/src/output_command.c index 5da176dde..9d948c8cc 100644 --- a/src/output_command.c +++ b/src/output_command.c @@ -31,6 +31,8 @@ #include "mixer_control.h" #include "idle.h" +extern unsigned audio_output_state_version; + bool audio_output_enable_index(unsigned idx) { @@ -44,6 +46,8 @@ audio_output_enable_index(unsigned idx) ao->enabled = true; idle_add(IDLE_OUTPUT); + ++audio_output_state_version; + return true; } @@ -67,5 +71,7 @@ audio_output_disable_index(unsigned idx) idle_add(IDLE_MIXER); } + ++audio_output_state_version; + return true; } diff --git a/src/output_state.c b/src/output_state.c index 7fc60518c..be135f6d0 100644 --- a/src/output_state.c +++ b/src/output_state.c @@ -34,6 +34,8 @@ #define AUDIO_DEVICE_STATE "audio_device_state:" +unsigned audio_output_state_version; + void audio_output_state_save(FILE *fp) { @@ -80,3 +82,9 @@ audio_output_state_read(const char *line) ao->enabled = false; return true; } + +unsigned +audio_output_state_get_version(void) +{ + return audio_output_state_version; +} diff --git a/src/output_state.h b/src/output_state.h index 1efae94a1..3b865f5fe 100644 --- a/src/output_state.h +++ b/src/output_state.h @@ -34,4 +34,12 @@ audio_output_state_read(const char *line); void audio_output_state_save(FILE *fp); +/** + * Generates a version number for the current state of the audio + * outputs. This is used by timer_save_state_file() to determine + * whether the state has changed and the state file should be saved. + */ +unsigned +audio_output_state_get_version(void); + #endif |