fork github.com/doug-martin

exp/lock.go

@@ -0,0 +1,48 @@
+package exp
+
+type (
+	LockStrength int
+	WaitOption   int
+	Lock         interface {
+		Strength() LockStrength
+		WaitOption() WaitOption
+		Of() []IdentifierExpression
+	}
+	lock struct {
+		strength   LockStrength
+		waitOption WaitOption
+		of         []IdentifierExpression
+	}
+)
+
+const (
+	ForNolock LockStrength = iota
+	ForUpdate
+	ForNoKeyUpdate
+	ForShare
+	ForKeyShare
+
+	Wait WaitOption = iota
+	NoWait
+	SkipLocked
+)
+
+func NewLock(strength LockStrength, option WaitOption, of ...IdentifierExpression) Lock {
+	return lock{
+		strength:   strength,
+		waitOption: option,
+		of:         of,
+	}
+}
+
+func (l lock) Strength() LockStrength {
+	return l.strength
+}
+
+func (l lock) WaitOption() WaitOption {
+	return l.waitOption
+}
+
+func (l lock) Of() []IdentifierExpression {
+	return l.of
+}