sync/locker.go

@@ -0,0 +1,77 @@
+package usync
+
+import "sync"
+
+// Locker guards access to a value. It must not be copied after first use.
+type Locker[T any] struct {
+	value T
+	mutex sync.Mutex
+}
+
+// NewLocker creates a new locker with the specified value.
+func NewLocker[T any] (value T) Locker[T] {
+	return Locker[T] {
+		value: value,
+	}
+}
+
+// Set sets the value of the locker.
+func (this *Locker[T]) Set (value T) {
+	this.mutex.Lock()
+	defer this.mutex.Unlock()
+	this.value = value
+}
+
+// Borrow borrows the value from the locker, and returns a function that must
+// immediately be deferred, like this:
+//
+//   value, done := locker.Borrow()
+//   defer done()
+//
+// From the time Borrow is called to the time the done function is called, it is
+// safe to access the locked object from within the current goroutine.
+func (this *Locker[T]) Borrow () (T, func ()) {
+	this.mutex.Lock()
+	return this.value, this.mutex.Unlock
+}
+
+// RWLocker guards separate read/write access to a value.
+type RWLocker[T any] struct {
+	value T
+	mutex sync.RWMutex
+}
+
+// NewRWLocker creates a new locker with the specified value. It must not be
+// copied after first use.
+func NewRWLocker[T any] (value T) RWLocker[T] {
+	return RWLocker[T] {
+		value: value,
+	}
+}
+
+// Set sets the value of the locker.
+func (this *RWLocker[T]) Set (value T) {
+	this.mutex.Lock()
+	defer this.mutex.Unlock()
+	this.value = value
+}
+
+// Borrow borrows the value from the locker for write access, and returns a
+// function that must immediately be deferred, like this:
+//
+//   value, done := locker.Borrow()
+//   defer done()
+//
+// From the time Borrow is called to the time the done function is called, it is
+// safe to access the locked object from within the current goroutine.
+func (this *RWLocker[T]) Borrow () (T, func ()) {
+	this.mutex.Lock()
+	return this.value, this.mutex.Unlock
+}
+
+// RBorrow is like Borrow, but returns the item for read access only. Do not
+// under any circumstances write to an item returned from this method.
+func (this *RWLocker[T]) RBorrow () (T, func ()) {
+	this.mutex.Lock()
+	return this.value, this.mutex.Unlock
+}

sync/monitor.go

@@ -1,77 +0,0 @@
-package usync
-
-import "sync"
-
-// Monitor guards access to a value. It must not be copied after first use.
-type Monitor[T any] struct {
-	value T
-	mutex sync.Mutex
-}
-
-// NewMonitor creates a new Monitor with the specified value.
-func NewMonitor[T any] (value T) Monitor[T] {
-	return Monitor[T] {
-		value: value,
-	}
-}
-
-// Set sets the value of the Monitor.
-func (this *Monitor[T]) Set (value T) {
-	this.mutex.Lock()
-	defer this.mutex.Unlock()
-	this.value = value
-}
-
-// Borrow borrows the value from the Monitor, and returns a function that must
-// immediately be deferred, like this:
-//
-//   value, done := Monitor.Borrow()
-//   defer done()
-//
-// From the time Borrow is called to the time the done function is called, it is
-// safe to access the locked object from within the current goroutine.
-func (this *Monitor[T]) Borrow () (T, func ()) {
-	this.mutex.Lock()
-	return this.value, this.mutex.Unlock
-}
-
-// RWMonitor guards separate read/write access to a value.
-type RWMonitor[T any] struct {
-	value T
-	mutex sync.RWMutex
-}
-
-// NewRWMonitor creates a new Monitor with the specified value. It must not be
-// copied after first use.
-func NewRWMonitor[T any] (value T) RWMonitor[T] {
-	return RWMonitor[T] {
-		value: value,
-	}
-}
-
-// Set sets the value of the Monitor.
-func (this *RWMonitor[T]) Set (value T) {
-	this.mutex.Lock()
-	defer this.mutex.Unlock()
-	this.value = value
-}
-
-// Borrow borrows the value from the Monitor for write access, and returns a
-// function that must immediately be deferred, like this:
-//
-//   value, done := Monitor.Borrow()
-//   defer done()
-//
-// From the time Borrow is called to the time the done function is called, it is
-// safe to access the locked object from within the current goroutine.
-func (this *RWMonitor[T]) Borrow () (T, func ()) {
-	this.mutex.Lock()
-	return this.value, this.mutex.Unlock
-}
-
-// RBorrow is like Borrow, but returns the item for read access only. Do not
-// under any circumstances modify anything returned by this method.
-func (this *RWMonitor[T]) RBorrow () (T, func ()) {
-	this.mutex.Lock()
-	return this.value, this.mutex.Unlock
-}