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Let's actually hide RWMutex's methods to clean a namespace.

This commit is contained in:
Alexander Andreev 2023-10-09 00:21:44 +04:00
parent 5de3f8e9af
commit c9e30f76e6
Signed by: Arav
GPG Key ID: D22A817D95815393
4 changed files with 32 additions and 32 deletions

View File

@ -10,7 +10,7 @@ import (
// ListenerCounter stores the current and peak numbers of listeners.
type ListenerCounter struct {
sync.RWMutex
mutex sync.RWMutex
current, peak int
}
@ -21,22 +21,22 @@ func NewListenerCounter() *ListenerCounter {
// Current returns a number of current listeners.
func (l *ListenerCounter) Current() int {
l.RLock()
defer l.RUnlock()
l.mutex.RLock()
defer l.mutex.RUnlock()
return l.current
}
// Current returns a number of peak listeners.
func (l *ListenerCounter) Peak() int {
l.RLock()
defer l.RUnlock()
l.mutex.RLock()
defer l.mutex.RUnlock()
return l.peak
}
// Inc increments by 1 a current number of listeners and updates a peak number.
func (l *ListenerCounter) Inc() int {
l.Lock()
defer l.Unlock()
l.mutex.Lock()
defer l.mutex.Unlock()
if l.current == math.MaxInt {
// We panic here because if this will ever happen, then something's going certainly wrong.
panic(fmt.Sprint("a current number of listeners exceeded MaxInt which is", math.MaxInt))
@ -51,8 +51,8 @@ func (l *ListenerCounter) Inc() int {
// Dec decrements by 1 a current number of listeners. An error will occur if
// a resulting number is less than 0.
func (l *ListenerCounter) Dec() (int, error) {
l.Lock()
defer l.Unlock()
l.mutex.Lock()
defer l.mutex.Unlock()
if l.current == 0 {
return l.current, errors.New("an attempt to decrement a number of current listeners down to less than 0")
}
@ -61,8 +61,8 @@ func (l *ListenerCounter) Dec() (int, error) {
}
func (l *ListenerCounter) MarshalJSON() ([]byte, error) {
l.RLock()
defer l.RUnlock()
l.mutex.RLock()
defer l.mutex.RUnlock()
return json.Marshal(&struct {
Current int `json:"current"`
Peak int `json:"peak"`

View File

@ -13,7 +13,7 @@ const MostListenedDateFormat string = "02 January 2006 at 15:04:05 MST"
// MostListenedSong holds a metadata for a most listened song.
type MostListenedSong struct {
sync.RWMutex
mutex sync.RWMutex
Date time.Time `json:"date"`
Listeners int `json:"listeners"`
Song string `json:"song"`
@ -21,8 +21,8 @@ type MostListenedSong struct {
}
func (mls *MostListenedSong) Update(song Song) {
mls.Lock()
defer mls.Unlock()
mls.mutex.Lock()
defer mls.mutex.Unlock()
if song.Artist == "" {
return
}
@ -35,8 +35,8 @@ func (mls *MostListenedSong) Update(song Song) {
}
func (mls *MostListenedSong) Get() *MostListenedSong {
mls.RLock()
defer mls.RUnlock()
mls.mutex.RLock()
defer mls.mutex.RUnlock()
if mls.Date.Year() == 1 {
return nil
@ -50,8 +50,8 @@ func (mls *MostListenedSong) Get() *MostListenedSong {
// Load parses given data and fill a MostListenedSong.
func (mls *MostListenedSong) Load(data []byte) (err error) {
mls.Lock()
defer mls.Unlock()
mls.mutex.Lock()
defer mls.mutex.Unlock()
lines := bytes.Split(data, []byte{'\n'})
if len(lines) != 3 {

View File

@ -10,7 +10,7 @@ import (
// Playlist holds a list of paths to a song files.
type Playlist struct {
sync.Mutex
mutex sync.Mutex
filePath string
playlist []string
cur int
@ -27,8 +27,8 @@ func NewPlaylist(filePath string, repeat bool) (*Playlist, error) {
// Next returns the next song to play. Returns an empty string if repeat is
// false and the end of a playlist was reached.
func (p *Playlist) Next() (song string) {
p.Lock()
defer p.Unlock()
p.mutex.Lock()
defer p.mutex.Unlock()
if p.cur == len(p.playlist) {
// If the end of a playlist was reached and repeat is set to true,
// then go back to the head of it, thus repeating it. Return an empty
@ -55,10 +55,10 @@ func (p *Playlist) load() error {
return errors.New("a playlist file is empty. Did not update")
}
p.Lock()
p.mutex.Lock()
p.playlist = strings.Split(string(data), "\n")
p.cur = 0
p.Unlock()
p.mutex.Unlock()
return nil
}

View File

@ -42,7 +42,7 @@ func (s *Song) MarshalJSON() ([]byte, error) {
// SongList holds a currently playing song and a list of previously played ones
// with a maximal length of maxLen.
type SongList struct {
sync.RWMutex
mutex sync.RWMutex
current Song
lastSongs []Song
maxLen int
@ -55,8 +55,8 @@ func NewSongList(maxLen int) *SongList {
// Add a new song that is currently playing and update a list.
func (sl *SongList) Add(newSong Song) {
sl.Lock()
defer sl.Unlock()
sl.mutex.Lock()
defer sl.mutex.Unlock()
if sl.current.StartAt.Year() == 1 {
sl.current = newSong
@ -73,8 +73,8 @@ func (sl *SongList) Add(newSong Song) {
// Current returns a currently playing song or nil if it isn't set yet.
func (sl *SongList) Current() *Song {
sl.RLock()
defer sl.RUnlock()
sl.mutex.RLock()
defer sl.mutex.RUnlock()
if sl.current.StartAt.Year() == 1 {
return nil
}
@ -89,8 +89,8 @@ func (sl *SongList) Current() *Song {
// UpdateCurrentMaxListeners checks and updates a maximal number of listeners
// for a current song.
func (sl *SongList) UpdateCurrentMaxListeners(listeners int) {
sl.Lock()
defer sl.Unlock()
sl.mutex.Lock()
defer sl.mutex.Unlock()
if listeners > sl.current.MaxListeners {
sl.current.MaxListeners = listeners
}
@ -98,8 +98,8 @@ func (sl *SongList) UpdateCurrentMaxListeners(listeners int) {
// List returns a list of lastly played songs.
func (sl *SongList) List() []Song {
sl.RLock()
defer sl.RUnlock()
sl.mutex.RLock()
defer sl.mutex.RUnlock()
return sl.lastSongs
}