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counters.go
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counters.go
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package races
import "sync"
type Counter struct {
count int
}
func (c *Counter) Inc() {
c.count++
}
func (c *Counter) Value() int {
return c.count
}
func (c *Counter) Set(v int) {
c.count = v
}
type SynchronizedCounter struct {
mu *sync.Mutex
count int
}
func (c *SynchronizedCounter) Inc() {
c.mu.Lock()
defer c.mu.Unlock()
c.count++
}
func (c *SynchronizedCounter) Value() int {
c.mu.Lock()
defer c.mu.Unlock()
return c.count
}
func (c *SynchronizedCounter) Set(v int) {
c.mu.Lock()
defer c.mu.Unlock()
c.count = v
}
type MisSynchronizedCounter struct {
mu sync.Mutex
count int
}
func (c MisSynchronizedCounter) Inc() {
c.mu.Lock()
defer c.mu.Unlock()
c.count++
}
func (c *MisSynchronizedCounter) Value() int {
c.mu.Lock()
defer c.mu.Unlock()
return c.count
}
func (c *MisSynchronizedCounter) Set(v int) {
c.mu.Lock()
defer c.mu.Unlock()
c.count = v
}