sync: add available godoc link

Change-Id: I9bc5fd29b0eec8ceadcfee2116de5e7524ef92c2
Reviewed-on: https://go-review.googlesource.com/c/go/+/539617
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: shuang cui <imcusg@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>

src/sync/atomic/value.go

@@ -9,8 +9,8 @@ import (
 )
 
 // A Value provides an atomic load and store of a consistently typed value.
-// The zero value for a Value returns nil from Load.
-// Once Store has been called, a Value must not be copied.
+// The zero value for a Value returns nil from [Value.Load].
+// Once [Value.Store] has been called, a Value must not be copied.
 //
 // A Value must not be copied after first use.
 type Value struct {
@@ -41,7 +41,7 @@ func (v *Value) Load() (val any) {
 
 var firstStoreInProgress byte
 
-// Store sets the value of the Value v to val.
+// Store sets the value of the [Value] v to val.
 // All calls to Store for a given Value must use values of the same concrete type.
 // Store of an inconsistent type panics, as does Store(nil).
 func (v *Value) Store(val any) {
@@ -127,7 +127,7 @@ func (v *Value) Swap(new any) (old any) {
 	}
 }
 
-// CompareAndSwap executes the compare-and-swap operation for the Value.
+// CompareAndSwap executes the compare-and-swap operation for the [Value].
 //
 // All calls to CompareAndSwap for a given Value must use values of the same
 // concrete type. CompareAndSwap of an inconsistent type panics, as does

src/sync/cond.go

@@ -13,21 +13,21 @@ import (
 // for goroutines waiting for or announcing the occurrence
 // of an event.
 //
-// Each Cond has an associated Locker L (often a *Mutex or *RWMutex),
+// Each Cond has an associated Locker L (often a [*Mutex] or [*RWMutex]),
 // which must be held when changing the condition and
-// when calling the Wait method.
+// when calling the [Cond.Wait] method.
 //
 // A Cond must not be copied after first use.
 //
 // In the terminology of the Go memory model, Cond arranges that
-// a call to Broadcast or Signal “synchronizes before” any Wait call
+// a call to [Cond.Broadcast] or [Cond.Signal] “synchronizes before” any Wait call
 // that it unblocks.
 //
 // For many simple use cases, users will be better off using channels than a
 // Cond (Broadcast corresponds to closing a channel, and Signal corresponds to
 // sending on a channel).
 //
-// For more on replacements for sync.Cond, see [Roberto Clapis's series on
+// For more on replacements for [sync.Cond], see [Roberto Clapis's series on
 // advanced concurrency patterns], as well as [Bryan Mills's talk on concurrency
 // patterns].
 //
@@ -51,7 +51,7 @@ func NewCond(l Locker) *Cond {
 // Wait atomically unlocks c.L and suspends execution
 // of the calling goroutine. After later resuming execution,
 // Wait locks c.L before returning. Unlike in other systems,
-// Wait cannot return unless awoken by Broadcast or Signal.
+// Wait cannot return unless awoken by [Cond.Broadcast] or [Cond.Signal].
 //
 // Because c.L is not locked while Wait is waiting, the caller
 // typically cannot assume that the condition is true when

src/sync/map.go

@@ -20,18 +20,19 @@ import (
 // key is only ever written once but read many times, as in caches that only grow,
 // or (2) when multiple goroutines read, write, and overwrite entries for disjoint
 // sets of keys. In these two cases, use of a Map may significantly reduce lock
-// contention compared to a Go map paired with a separate Mutex or RWMutex.
+// contention compared to a Go map paired with a separate [Mutex] or [RWMutex].
 //
 // The zero Map is empty and ready for use. A Map must not be copied after first use.
 //
 // In the terminology of the Go memory model, Map arranges that a write operation
 // “synchronizes before” any read operation that observes the effect of the write, where
 // read and write operations are defined as follows.
-// Load, LoadAndDelete, LoadOrStore, Swap, CompareAndSwap, and CompareAndDelete
-// are read operations; Delete, LoadAndDelete, Store, and Swap are write operations;
-// LoadOrStore is a write operation when it returns loaded set to false;
-// CompareAndSwap is a write operation when it returns swapped set to true;
-// and CompareAndDelete is a write operation when it returns deleted set to true.
+// [Map.Load], [Map.LoadAndDelete], [Map.LoadOrStore], [Map.Swap], [Map.CompareAndSwap],
+// and [Map.CompareAndDelete] are read operations;
+// [Map.Delete], [Map.LoadAndDelete], [Map.Store], and [Map.Swap] are write operations;
+// [Map.LoadOrStore] is a write operation when it returns loaded set to false;
+// [Map.CompareAndSwap] is a write operation when it returns swapped set to true;
+// and [Map.CompareAndDelete] is a write operation when it returns deleted set to true.
 type Map struct {
 	mu Mutex
 

src/sync/mutex.go

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // Package sync provides basic synchronization primitives such as mutual
-// exclusion locks. Other than the Once and WaitGroup types, most are intended
+// exclusion locks. Other than the [Once] and [WaitGroup] types, most are intended
 // for use by low-level library routines. Higher-level synchronization is
 // better done via channels and communication.
 //
@@ -26,9 +26,9 @@ func fatal(string)
 // A Mutex must not be copied after first use.
 //
 // In the terminology of the Go memory model,
-// the n'th call to Unlock “synchronizes before” the m'th call to Lock
+// the n'th call to [Mutex.Unlock] “synchronizes before” the m'th call to [Mutex.Lock]
 // for any n < m.
-// A successful call to TryLock is equivalent to a call to Lock.
+// A successful call to [Mutex.TryLock] is equivalent to a call to Lock.
 // A failed call to TryLock does not establish any “synchronizes before”
 // relation at all.
 type Mutex struct {
@@ -206,7 +206,7 @@ func (m *Mutex) lockSlow() {
 // Unlock unlocks m.
 // It is a run-time error if m is not locked on entry to Unlock.
 //
-// A locked Mutex is not associated with a particular goroutine.
+// A locked [Mutex] is not associated with a particular goroutine.
 // It is allowed for one goroutine to lock a Mutex and then
 // arrange for another goroutine to unlock it.
 func (m *Mutex) Unlock() {

src/sync/once.go

@@ -26,7 +26,7 @@ type Once struct {
 }
 
 // Do calls the function f if and only if Do is being called for the
-// first time for this instance of Once. In other words, given
+// first time for this instance of [Once]. In other words, given
 //
 //	var once Once
 //

src/sync/pool.go

@@ -43,7 +43,7 @@ import (
 // A Pool must not be copied after first use.
 //
 // In the terminology of the Go memory model, a call to Put(x) “synchronizes before”
-// a call to Get returning that same value x.
+// a call to [Pool.Get] returning that same value x.
 // Similarly, a call to New returning x “synchronizes before”
 // a call to Get returning that same value x.
 type Pool struct {
@@ -117,10 +117,10 @@ func (p *Pool) Put(x any) {
 	}
 }
 
-// Get selects an arbitrary item from the Pool, removes it from the
+// Get selects an arbitrary item from the [Pool], removes it from the
 // Pool, and returns it to the caller.
 // Get may choose to ignore the pool and treat it as empty.
-// Callers should not assume any relation between values passed to Put and
+// Callers should not assume any relation between values passed to [Pool.Put] and
 // the values returned by Get.
 //
 // If Get would otherwise return nil and p.New is non-nil, Get returns

src/sync/rwmutex.go

@@ -19,18 +19,18 @@ import (
 //
 // A RWMutex must not be copied after first use.
 //
-// If any goroutine calls Lock while the lock is already held by
-// one or more readers, concurrent calls to RLock will block until
+// If any goroutine calls [RWMutex.Lock] while the lock is already held by
+// one or more readers, concurrent calls to [RWMutex.RLock] will block until
 // the writer has acquired (and released) the lock, to ensure that
 // the lock eventually becomes available to the writer.
 // Note that this prohibits recursive read-locking.
 //
 // In the terminology of the Go memory model,
-// the n'th call to Unlock “synchronizes before” the m'th call to Lock
-// for any n < m, just as for Mutex.
+// the n'th call to [RWMutex.Unlock] “synchronizes before” the m'th call to Lock
+// for any n < m, just as for [Mutex].
 // For any call to RLock, there exists an n such that
 // the n'th call to Unlock “synchronizes before” that call to RLock,
-// and the corresponding call to RUnlock “synchronizes before”
+// and the corresponding call to [RWMutex.RUnlock] “synchronizes before”
 // the n+1'th call to Lock.
 type RWMutex struct {
 	w           Mutex        // held if there are pending writers
@@ -59,7 +59,7 @@ const rwmutexMaxReaders = 1 << 30
 //
 // It should not be used for recursive read locking; a blocked Lock
 // call excludes new readers from acquiring the lock. See the
-// documentation on the RWMutex type.
+// documentation on the [RWMutex] type.
 func (rw *RWMutex) RLock() {
 	if race.Enabled {
 		_ = rw.w.state
@@ -103,7 +103,7 @@ func (rw *RWMutex) TryRLock() bool {
 	}
 }
 
-// RUnlock undoes a single RLock call;
+// RUnlock undoes a single [RWMutex.RLock] call;
 // it does not affect other simultaneous readers.
 // It is a run-time error if rw is not locked for reading
 // on entry to RUnlock.
@@ -191,9 +191,9 @@ func (rw *RWMutex) TryLock() bool {
 // Unlock unlocks rw for writing. It is a run-time error if rw is
 // not locked for writing on entry to Unlock.
 //
-// As with Mutexes, a locked RWMutex is not associated with a particular
-// goroutine. One goroutine may RLock (Lock) a RWMutex and then
-// arrange for another goroutine to RUnlock (Unlock) it.
+// As with Mutexes, a locked [RWMutex] is not associated with a particular
+// goroutine. One goroutine may [RWMutex.RLock] ([RWMutex.Lock]) a RWMutex and then
+// arrange for another goroutine to [RWMutex.RUnlock] ([RWMutex.Unlock]) it.
 func (rw *RWMutex) Unlock() {
 	if race.Enabled {
 		_ = rw.w.state
@@ -231,8 +231,8 @@ func syscall_hasWaitingReaders(rw *RWMutex) bool {
 	return r < 0 && r+rwmutexMaxReaders > 0
 }
 
-// RLocker returns a Locker interface that implements
-// the Lock and Unlock methods by calling rw.RLock and rw.RUnlock.
+// RLocker returns a [Locker] interface that implements
+// the [RWMutex.Lock] and [RWMutex.Unlock] methods by calling rw.RLock and rw.RUnlock.
 func (rw *RWMutex) RLocker() Locker {
 	return (*rlocker)(rw)
 }

src/sync/waitgroup.go

@@ -11,14 +11,14 @@ import (
 )
 
 // A WaitGroup waits for a collection of goroutines to finish.
-// The main goroutine calls Add to set the number of
+// The main goroutine calls [WaitGroup.Add] to set the number of
 // goroutines to wait for. Then each of the goroutines
-// runs and calls Done when finished. At the same time,
-// Wait can be used to block until all goroutines have finished.
+// runs and calls [WaitGroup.Done] when finished. At the same time,
+// [WaitGroup.Wait] can be used to block until all goroutines have finished.
 //
 // A WaitGroup must not be copied after first use.
 //
-// In the terminology of the Go memory model, a call to Done
+// In the terminology of the Go memory model, a call to [WaitGroup.Done]
 // “synchronizes before” the return of any Wait call that it unblocks.
 type WaitGroup struct {
 	noCopy noCopy
@@ -27,8 +27,8 @@ type WaitGroup struct {
 	sema  uint32
 }
 
-// Add adds delta, which may be negative, to the WaitGroup counter.
-// If the counter becomes zero, all goroutines blocked on Wait are released.
+// Add adds delta, which may be negative, to the [WaitGroup] counter.
+// If the counter becomes zero, all goroutines blocked on [WaitGroup.Wait] are released.
 // If the counter goes negative, Add panics.
 //
 // Note that calls with a positive delta that occur when the counter is zero
@@ -82,12 +82,12 @@ func (wg *WaitGroup) Add(delta int) {
 	}
 }
 
-// Done decrements the WaitGroup counter by one.
+// Done decrements the [WaitGroup] counter by one.
 func (wg *WaitGroup) Done() {
 	wg.Add(-1)
 }
 
-// Wait blocks until the WaitGroup counter is zero.
+// Wait blocks until the [WaitGroup] counter is zero.
 func (wg *WaitGroup) Wait() {
 	if race.Enabled {
 		race.Disable()