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author | 2025-03-09 17:47:56 +0100 | |
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committer | 2025-03-10 01:59:49 +0100 | |
commit | 3ac1ee16f377d31a0fb80c8dae28b6239ac4229e (patch) | |
tree | f61faa581feaaeaba2542b9f2b8234a590684413 /vendor/google.golang.org/grpc/internal/buffer/unbounded.go | |
parent | [chore] update URLs to forked source (diff) | |
download | gotosocial-3ac1ee16f377d31a0fb80c8dae28b6239ac4229e.tar.xz |
[chore] remove vendor
Diffstat (limited to 'vendor/google.golang.org/grpc/internal/buffer/unbounded.go')
-rw-r--r-- | vendor/google.golang.org/grpc/internal/buffer/unbounded.go | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/vendor/google.golang.org/grpc/internal/buffer/unbounded.go b/vendor/google.golang.org/grpc/internal/buffer/unbounded.go deleted file mode 100644 index 11f91668a..000000000 --- a/vendor/google.golang.org/grpc/internal/buffer/unbounded.go +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Copyright 2019 gRPC authors. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - */ - -// Package buffer provides an implementation of an unbounded buffer. -package buffer - -import ( - "errors" - "sync" -) - -// Unbounded is an implementation of an unbounded buffer which does not use -// extra goroutines. This is typically used for passing updates from one entity -// to another within gRPC. -// -// All methods on this type are thread-safe and don't block on anything except -// the underlying mutex used for synchronization. -// -// Unbounded supports values of any type to be stored in it by using a channel -// of `any`. This means that a call to Put() incurs an extra memory allocation, -// and also that users need a type assertion while reading. For performance -// critical code paths, using Unbounded is strongly discouraged and defining a -// new type specific implementation of this buffer is preferred. See -// internal/transport/transport.go for an example of this. -type Unbounded struct { - c chan any - closed bool - closing bool - mu sync.Mutex - backlog []any -} - -// NewUnbounded returns a new instance of Unbounded. -func NewUnbounded() *Unbounded { - return &Unbounded{c: make(chan any, 1)} -} - -var errBufferClosed = errors.New("Put called on closed buffer.Unbounded") - -// Put adds t to the unbounded buffer. -func (b *Unbounded) Put(t any) error { - b.mu.Lock() - defer b.mu.Unlock() - if b.closing { - return errBufferClosed - } - if len(b.backlog) == 0 { - select { - case b.c <- t: - return nil - default: - } - } - b.backlog = append(b.backlog, t) - return nil -} - -// Load sends the earliest buffered data, if any, onto the read channel returned -// by Get(). Users are expected to call this every time they successfully read a -// value from the read channel. -func (b *Unbounded) Load() { - b.mu.Lock() - defer b.mu.Unlock() - if len(b.backlog) > 0 { - select { - case b.c <- b.backlog[0]: - b.backlog[0] = nil - b.backlog = b.backlog[1:] - default: - } - } else if b.closing && !b.closed { - close(b.c) - } -} - -// Get returns a read channel on which values added to the buffer, via Put(), -// are sent on. -// -// Upon reading a value from this channel, users are expected to call Load() to -// send the next buffered value onto the channel if there is any. -// -// If the unbounded buffer is closed, the read channel returned by this method -// is closed after all data is drained. -func (b *Unbounded) Get() <-chan any { - return b.c -} - -// Close closes the unbounded buffer. No subsequent data may be Put(), and the -// channel returned from Get() will be closed after all the data is read and -// Load() is called for the final time. -func (b *Unbounded) Close() { - b.mu.Lock() - defer b.mu.Unlock() - if b.closing { - return - } - b.closing = true - if len(b.backlog) == 0 { - b.closed = true - close(b.c) - } -} |