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https://github.com/gohugoio/hugo.git
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parent
f52b040ee1
commit
02effd9dc4
2 changed files with 53 additions and 0 deletions
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@ -17,11 +17,13 @@ import (
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"github.com/spf13/hugo/helpers"
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"reflect"
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"sort"
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"sync"
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)
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// Scratch is a writable context used for stateful operations in Page/Node rendering.
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type Scratch struct {
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values map[string]interface{}
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mu sync.RWMutex
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}
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// For single values, Add will add (using the + operator) the addend to the existing addend (if found).
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@ -29,6 +31,9 @@ type Scratch struct {
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//
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// If the first add for a key is an array or slice, then the next value(s) will be appended.
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func (c *Scratch) Add(key string, newAddend interface{}) (string, error) {
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c.mu.Lock()
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defer c.mu.Unlock()
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var newVal interface{}
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existingAddend, found := c.values[key]
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if found {
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@ -59,18 +64,27 @@ func (c *Scratch) Add(key string, newAddend interface{}) (string, error) {
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// Set stores a value with the given key in the Node context.
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// This value can later be retrieved with Get.
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func (c *Scratch) Set(key string, value interface{}) string {
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c.mu.Lock()
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defer c.mu.Unlock()
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c.values[key] = value
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return ""
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}
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// Get returns a value previously set by Add or Set
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func (c *Scratch) Get(key string) interface{} {
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c.mu.RLock()
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defer c.mu.RUnlock()
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return c.values[key]
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}
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// SetInMap stores a value to a map with the given key in the Node context.
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// This map can later be retrieved with GetSortedMapValues.
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func (c *Scratch) SetInMap(key string, mapKey string, value interface{}) string {
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c.mu.Lock()
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defer c.mu.Unlock()
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_, found := c.values[key]
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if !found {
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c.values[key] = make(map[string]interface{})
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@ -82,6 +96,9 @@ func (c *Scratch) SetInMap(key string, mapKey string, value interface{}) string
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// GetSortedMapValues returns a sorted map previously filled with SetInMap
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func (c *Scratch) GetSortedMapValues(key string) interface{} {
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c.mu.RLock()
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defer c.mu.RUnlock()
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if c.values[key] == nil {
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return nil
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}
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@ -16,6 +16,7 @@ package hugolib
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import (
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"github.com/stretchr/testify/assert"
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"reflect"
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"sync"
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"testing"
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)
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@ -80,6 +81,41 @@ func TestScratchSet(t *testing.T) {
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assert.Equal(t, "val", scratch.Get("key"))
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}
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// Issue #2005
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func TestScratchInParallel(t *testing.T) {
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var wg sync.WaitGroup
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scratch := newScratch()
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key := "counter"
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scratch.Set(key, 1)
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for i := 1; i <= 10; i++ {
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wg.Add(1)
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go func(j int) {
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for k := 0; k < 10; k++ {
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newVal := k + j
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_, err := scratch.Add(key, newVal)
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if err != nil {
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t.Errorf("Got err %s", err)
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}
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scratch.Set(key, newVal)
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val := scratch.Get(key)
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if counter, ok := val.(int); ok {
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if counter < 1 {
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t.Errorf("Got %d", counter)
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}
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} else {
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t.Errorf("Got %T", val)
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}
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}
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wg.Done()
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}(i)
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}
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wg.Wait()
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}
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func TestScratchGet(t *testing.T) {
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scratch := newScratch()
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nothing := scratch.Get("nothing")
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