diff options
Diffstat (limited to 'src/lib/sync/mutex.go')
| -rw-r--r-- | src/lib/sync/mutex.go | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/src/lib/sync/mutex.go b/src/lib/sync/mutex.go index e485867802..5a6311a837 100644 --- a/src/lib/sync/mutex.go +++ b/src/lib/sync/mutex.go @@ -2,19 +2,19 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -/* - The sync /* package * / provides basic sync primitives. - // Such as mutual exclusion locks. -*/ +// The sync package provides basic synchronization primitives +// such as mutual exclusion locks. These are intended for use +// by low-level library routines. Higher-level synchronization +// is better done via channels and communication. package sync func cas(val *int32, old, new int32) bool func semacquire(*int32) func semrelease(*int32) - // A Mutex is a mutual exclusion lock. - // Mutexes can be created as part of other structures; - // the zero value for a Mutex is an unlocked mutex. +// A Mutex is a mutual exclusion lock. +// Mutexes can be created as part of other structures; +// the zero value for a Mutex is an unlocked mutex. type Mutex struct { key int32; sema int32; @@ -30,11 +30,9 @@ func xadd(val *int32, delta int32) (new int32) { panic("unreached") } -/* - * Lock locks m. - * If the lock is already in use, the calling goroutine - * blocks until the mutex is available. - */ +// Lock locks m. +// If the lock is already in use, the calling goroutine +// blocks until the mutex is available. func (m *Mutex) Lock() { if xadd(&m.key, 1) == 1 { // changed from 0 to 1; we hold lock |