1 files changed, 87 insertions, 0 deletions
diff --git a/vendor/codeberg.org/gruf/go-mutexes/cond.go b/vendor/codeberg.org/gruf/go-mutexes/cond.go
new file mode 100644
index 000000000..d89040c02
--- /dev/null
+++ b/vendor/codeberg.org/gruf/go-mutexes/cond.go
@@ -0,0 +1,87 @@
+package mutexes
+
+import (
+	"sync"
+	"unsafe"
+)
+
+// Cond is similar to a sync.Cond{}, but
+// it encompasses the Mutex{} within itself.
+type Cond struct {
+	notify notifyList
+	sync.Mutex
+}
+
+// See: sync.Cond{}.Wait().
+func (c *Cond) Wait() {
+	t := runtime_notifyListAdd(&c.notify)
+	c.Mutex.Unlock()
+	runtime_notifyListWait(&c.notify, t)
+	c.Mutex.Lock()
+}
+
+// See: sync.Cond{}.Signal().
+func (c *Cond) Signal() { runtime_notifyListNotifyOne(&c.notify) }
+
+// See: sync.Cond{}.Broadcast().
+func (c *Cond) Broadcast() { runtime_notifyListNotifyAll(&c.notify) }
+
+// RWCond is similar to a sync.Cond{}, but
+// it encompasses the RWMutex{} within itself.
+type RWCond struct {
+	notify notifyList
+	sync.RWMutex
+}
+
+// See: sync.Cond{}.Wait().
+func (c *RWCond) Wait() {
+	t := runtime_notifyListAdd(&c.notify)
+	c.RWMutex.Unlock()
+	runtime_notifyListWait(&c.notify, t)
+	c.RWMutex.Lock()
+}
+
+// See: sync.Cond{}.Signal().
+func (c *RWCond) Signal() { runtime_notifyListNotifyOne(&c.notify) }
+
+// See: sync.Cond{}.Broadcast().
+func (c *RWCond) Broadcast() { runtime_notifyListNotifyAll(&c.notify) }
+
+// unused fields left
+// un-named for safety.
+type notifyList struct {
+	_      uint32         // wait   uint32
+	notify uint32         // notify uint32
+	_      uintptr        // lock   mutex
+	_      unsafe.Pointer // head   *sudog
+	_      unsafe.Pointer // tail   *sudog
+}
+
+// See runtime/sema.go for documentation.
+//
+//go:linkname runtime_notifyListAdd sync.runtime_notifyListAdd
+func runtime_notifyListAdd(l *notifyList) uint32
+
+// See runtime/sema.go for documentation.
+//
+//go:linkname runtime_notifyListWait sync.runtime_notifyListWait
+func runtime_notifyListWait(l *notifyList, t uint32)
+
+// See runtime/sema.go for documentation.
+//
+//go:linkname runtime_notifyListNotifyOne sync.runtime_notifyListNotifyOne
+func runtime_notifyListNotifyOne(l *notifyList)
+
+// See runtime/sema.go for documentation.
+//
+//go:linkname runtime_notifyListNotifyAll sync.runtime_notifyListNotifyAll
+func runtime_notifyListNotifyAll(l *notifyList)
+
+// Ensure that sync and runtime agree on size of notifyList.
+//
+//go:linkname runtime_notifyListCheck sync.runtime_notifyListCheck
+func runtime_notifyListCheck(size uintptr)
+func init() {
+	var n notifyList
+	runtime_notifyListCheck(unsafe.Sizeof(n))
+}