Adam Van Ymeren
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
// mautrix-telegram - A Matrix-Telegram puppeting bridge.
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// Copyright (C) 2025 Automattic Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package connector
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import (
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"context"
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"sync"
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)
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type Future[T any] struct {
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value T
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err error
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ready chan struct{}
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once sync.Once
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}
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func NewFuture[T any]() *Future[T] {
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return &Future[T]{
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ready: make(chan struct{}),
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}
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}
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func (f *Future[T]) Set(value T) {
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f.once.Do(func() {
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f.value = value
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close(f.ready)
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})
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}
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func (f *Future[T]) Get(ctx context.Context) (T, error) {
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select {
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case <-f.ready:
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return f.value, nil
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case <-ctx.Done():
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return f.value, ctx.Err()
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}
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}
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