first-commit

modules/graceful/releasereopen/releasereopen.go

@@ -0,0 +1,61 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package releasereopen
+
+import (
+	"errors"
+	"sync"
+)
+
+type ReleaseReopener interface {
+	ReleaseReopen() error
+}
+
+type Manager struct {
+	mu      sync.Mutex
+	counter int64
+
+	releaseReopeners map[int64]ReleaseReopener
+}
+
+func (r *Manager) Register(rr ReleaseReopener) (cancel func()) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	r.counter++
+	currentCounter := r.counter
+	r.releaseReopeners[r.counter] = rr
+
+	return func() {
+		r.mu.Lock()
+		defer r.mu.Unlock()
+
+		delete(r.releaseReopeners, currentCounter)
+	}
+}
+
+func (r *Manager) ReleaseReopen() error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	var errs []error
+	for _, rr := range r.releaseReopeners {
+		if err := rr.ReleaseReopen(); err != nil {
+			errs = append(errs, err)
+		}
+	}
+	return errors.Join(errs...)
+}
+
+func GetManager() *Manager {
+	return manager
+}
+
+func NewManager() *Manager {
+	return &Manager{
+		releaseReopeners: make(map[int64]ReleaseReopener),
+	}
+}
+
+var manager = NewManager()