some deletions

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / mod@v0.3.0 / sumdb / cache.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/mod@v0.3.0/sumdb/cache.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/mod@v0.3.0/sumdb/cache.go
deleted file mode 100644 (file)
index 629e591..0000000
--- a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/mod@v0.3.0/sumdb/cache.go
+++ /dev/null
@@ -1,59 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Parallel cache.
-// This file is copied from cmd/go/internal/par.
-
-package sumdb
-
-import (
-       "sync"
-       "sync/atomic"
-)
-
-// parCache runs an action once per key and caches the result.
-type parCache struct {
-       m sync.Map
-}
-
-type cacheEntry struct {
-       done   uint32
-       mu     sync.Mutex
-       result interface{}
-}
-
-// Do calls the function f if and only if Do is being called for the first time with this key.
-// No call to Do with a given key returns until the one call to f returns.
-// Do returns the value returned by the one call to f.
-func (c *parCache) Do(key interface{}, f func() interface{}) interface{} {
-       entryIface, ok := c.m.Load(key)
-       if !ok {
-               entryIface, _ = c.m.LoadOrStore(key, new(cacheEntry))
-       }
-       e := entryIface.(*cacheEntry)
-       if atomic.LoadUint32(&e.done) == 0 {
-               e.mu.Lock()
-               if atomic.LoadUint32(&e.done) == 0 {
-                       e.result = f()
-                       atomic.StoreUint32(&e.done, 1)
-               }
-               e.mu.Unlock()
-       }
-       return e.result
-}
-
-// Get returns the cached result associated with key.
-// It returns nil if there is no such result.
-// If the result for key is being computed, Get does not wait for the computation to finish.
-func (c *parCache) Get(key interface{}) interface{} {
-       entryIface, ok := c.m.Load(key)
-       if !ok {
-               return nil
-       }
-       e := entryIface.(*cacheEntry)
-       if atomic.LoadUint32(&e.done) == 0 {
-               return nil
-       }
-       return e.result
-}