Update mojo sdk to rev f68e697e389943cd9bf9652397312280e96b127a

third_party/mojo/src/mojo/public/go/bindings/util.go

Index: third_party/mojo/src/mojo/public/go/bindings/util.go
diff --git a/third_party/mojo/src/mojo/public/go/bindings/util.go b/third_party/mojo/src/mojo/public/go/bindings/util.go
index 8d51ddb721cabec0606d38096ba7b2893ef3c28c..7886fe3d6b281cc66d34071698473e498313be24 100644
--- a/third_party/mojo/src/mojo/public/go/bindings/util.go
+++ b/third_party/mojo/src/mojo/public/go/bindings/util.go
@@ -4,6 +4,13 @@
 
 package bindings
 
+import (
+	"fmt"
+	"sync/atomic"
+
+	"mojo/public/go/system"
+)
+
 func align(size, alignment int) int {
 	return ((size - 1) | (alignment - 1)) + 1
 }
@@ -14,7 +21,27 @@ func bytesForBits(bits uint64) int {
 	return int((bits + 7) / 8)
 }
 
+// WriteMessage writes a message to a message pipe.
+func WriteMessage(handle system.MessagePipeHandle, message *Message) error {
+	result := handle.WriteMessage(message.Bytes, message.Handles, system.MOJO_WRITE_MESSAGE_FLAG_NONE)
+	if result != system.MOJO_RESULT_OK {
+		return fmt.Errorf("error writing message: %v", result)
+	}
+	return nil
+}
+
 // StringPointer converts provided string to *string.
 func StringPointer(s string) *string {
 	return &s
 }
+
+// Counter is a simple thread-safe lock-free counter that can issue unique
+// numbers starting from 1 to callers.
+type Counter struct {
+	last uint64
+}
+
+// Next returns next unused value, each value is returned only once.
+func (c *Counter) Next() uint64 {
+	return atomic.AddUint64(&c.last, 1)
+}