1 files changed, 0 insertions, 90 deletions
diff --git a/src/runtime/cond.go b/src/runtime/cond.go
deleted file mode 100644
index b27ab08ab..000000000
--- a/src/runtime/cond.go
+++ /dev/null
@@ -1,90 +0,0 @@
-//go:build !scheduler.none
-
-package runtime
-
-import (
-	"internal/task"
-	"sync/atomic"
-	"unsafe"
-)
-
-// notifiedPlaceholder is a placeholder task which is used to indicate that the condition variable has been notified.
-var notifiedPlaceholder task.Task
-
-// Cond is a simplified condition variable, useful for notifying goroutines of interrupts.
-type Cond struct {
-	t *task.Task
-}
-
-// Notify sends a notification.
-// If the condition variable already has a pending notification, this returns false.
-func (c *Cond) Notify() bool {
-	for {
-		t := (*task.Task)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t))))
-		switch t {
-		case nil:
-			// Nothing is waiting yet.
-			// Apply the notification placeholder.
-			if atomic.CompareAndSwapPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t)), unsafe.Pointer(t), unsafe.Pointer(&notifiedPlaceholder)) {
-				return true
-			}
-		case &notifiedPlaceholder:
-			// The condition variable has already been notified.
-			return false
-		default:
-			// Unblock the waiting task.
-			if atomic.CompareAndSwapPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t)), unsafe.Pointer(t), nil) {
-				scheduleTask(t)
-				return true
-			}
-		}
-	}
-}
-
-// Poll checks for a notification.
-// If a notification is found, it is cleared and this returns true.
-func (c *Cond) Poll() bool {
-	for {
-		t := (*task.Task)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t))))
-		switch t {
-		case nil:
-			// No notifications are present.
-			return false
-		case &notifiedPlaceholder:
-			// A notification arrived and there is no waiting goroutine.
-			// Clear the notification and return.
-			if atomic.CompareAndSwapPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t)), unsafe.Pointer(t), nil) {
-				return true
-			}
-		default:
-			// A task is blocked on the condition variable, which means it has not been notified.
-			return false
-		}
-	}
-}
-
-// Wait for a notification.
-// If the condition variable was previously notified, this returns immediately.
-func (c *Cond) Wait() {
-	cur := task.Current()
-	for {
-		t := (*task.Task)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t))))
-		switch t {
-		case nil:
-			// Condition variable has not been notified.
-			// Block the current task on the condition variable.
-			if atomic.CompareAndSwapPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t)), nil, unsafe.Pointer(cur)) {
-				task.Pause()
-				return
-			}
-		case &notifiedPlaceholder:
-			// A notification arrived and there is no waiting goroutine.
-			// Clear the notification and return.
-			if atomic.CompareAndSwapPointer((*unsafe.Pointer)(unsafe.Pointer(&c.t)), unsafe.Pointer(t), nil) {
-				return
-			}
-		default:
-			panic("interrupt.Cond: condition variable in use by another goroutine")
-		}
-	}
-}