Gianluca Boiano
2e33b81914
- Format Go files (gofmt) for backend/windows/notify*.go - Add thread safety to Stopwatch with sync.Mutex - Add comprehensive unit tests for Stopwatch with race detection - Add godoc comments to ImageCache public APIs - Improve IPC documentation with platform-specific socket path details - Document portable mode TODO for future enhancement
66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
package util
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
// Stopwatch is a thread-safe timer for measuring elapsed time.
|
|
// It can be started, stopped, and reset, and supports reading
|
|
// the elapsed time while running or stopped.
|
|
type Stopwatch struct {
|
|
mu sync.Mutex
|
|
running bool
|
|
started time.Time
|
|
elapsed time.Duration
|
|
}
|
|
|
|
// Start begins or resumes the stopwatch.
|
|
// If already running, this is a no-op.
|
|
func (s *Stopwatch) Start() {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
|
|
if s.running {
|
|
return
|
|
}
|
|
s.started = time.Now()
|
|
s.running = true
|
|
}
|
|
|
|
// Stop pauses the stopwatch and accumulates the elapsed time.
|
|
// If already stopped, this is a no-op.
|
|
func (s *Stopwatch) Stop() {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
|
|
if !s.running {
|
|
return
|
|
}
|
|
s.elapsed += time.Since(s.started)
|
|
s.running = false
|
|
}
|
|
|
|
// Elapsed returns the total elapsed time.
|
|
// If the stopwatch is running, includes time since last Start().
|
|
// Safe to call concurrently with other methods.
|
|
func (s *Stopwatch) Elapsed() time.Duration {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
|
|
e := s.elapsed
|
|
if s.running {
|
|
e += time.Since(s.started)
|
|
}
|
|
return e
|
|
}
|
|
|
|
// Reset stops the stopwatch and clears the elapsed time.
|
|
func (s *Stopwatch) Reset() {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
|
|
s.running = false
|
|
s.elapsed = time.Duration(0)
|
|
}
|