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replacer: use RWMutex to protect static provider (#6184)

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This commit is contained in:
Mohammed Al Sahaf 2024-03-21 21:15:18 +03:00 committed by GitHub
parent 97a56d860a
commit e7336cc3bf
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GPG Key ID: B5690EEEBB952194
2 changed files with 18 additions and 3 deletions
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11
replacer.go
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@ -22,6 +22,7 @@ import (
"runtime"
"strconv"
"strings"
"sync"
"time"
)
@ -29,6 +30,7 @@ import (
func NewReplacer() *Replacer {
rep := &Replacer{
static: make(map[string]any),
mapMutex: &sync.RWMutex{},
}
rep.providers = []ReplacerFunc{
globalDefaultReplacements,
@ -42,6 +44,7 @@ func NewReplacer() *Replacer {
func NewEmptyReplacer() *Replacer {
rep := &Replacer{
static: make(map[string]any),
mapMutex: &sync.RWMutex{},
}
rep.providers = []ReplacerFunc{
rep.fromStatic,
@ -54,7 +57,9 @@ func NewEmptyReplacer() *Replacer {
// use NewReplacer to make one.
type Replacer struct {
providers []ReplacerFunc
static map[string]any
mapMutex *sync.RWMutex
}
// Map adds mapFunc to the list of value providers.
@ -65,7 +70,9 @@ func (r *Replacer) Map(mapFunc ReplacerFunc) {
// Set sets a custom variable to a static value.
func (r *Replacer) Set(variable string, value any) {
r.mapMutex.Lock()
r.static[variable] = value
r.mapMutex.Unlock()
}
// Get gets a value from the replacer. It returns
@ -89,11 +96,15 @@ func (r *Replacer) GetString(variable string) (string, bool) {
// Delete removes a variable with a static value
// that was created using Set.
func (r *Replacer) Delete(variable string) {
r.mapMutex.Lock()
delete(r.static, variable)
r.mapMutex.Unlock()
}
// fromStatic provides values from r.static.
func (r *Replacer) fromStatic(key string) (any, bool) {
r.mapMutex.RLock()
defer r.mapMutex.RUnlock()
val, ok := r.static[key]
return val, ok
}

4
replacer_test.go
View File

@ -19,6 +19,7 @@ import (
"os"
"path/filepath"
"runtime"
"sync"
"testing"
)
@ -238,6 +239,7 @@ func TestReplacerSet(t *testing.T) {
func TestReplacerReplaceKnown(t *testing.T) {
rep := Replacer{
mapMutex: &sync.RWMutex{},
providers: []ReplacerFunc{
// split our possible vars to two functions (to test if both functions are called)
func(key string) (val any, ok bool) {
@ -310,6 +312,7 @@ func TestReplacerReplaceKnown(t *testing.T) {
func TestReplacerDelete(t *testing.T) {
rep := Replacer{
mapMutex: &sync.RWMutex{},
static: map[string]any{
"key1": "val1",
"key2": "val2",
@ -463,5 +466,6 @@ func testReplacer() Replacer {
return Replacer{
providers: make([]ReplacerFunc, 0),
static: make(map[string]any),
mapMutex: &sync.RWMutex{},
}
}