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Merge c0326ecfab into d520615e53

This commit is contained in:
Shawn 2016-12-06 06:25:56 +00:00 committed by GitHub
parent d520615e53 c0326ecfab
commit d859a34d99
1 changed files with 10 additions and 2 deletions
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12
cronexpr_parse.go
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@ -19,6 +19,7 @@ import (
"regexp"
"sort"
"strings"
"sync"
)
/******************************************************************************/
@ -193,6 +194,7 @@ var (
layoutDowOfSpecificWeek = `^(%value%)#([1-5])$`
fieldFinder = regexp.MustCompile(`\S+`)
entryFinder = regexp.MustCompile(`[^,]+`)
layoutRegexpLock = sync.Mutex{}
layoutRegexp = make(map[string]*regexp.Regexp)
)
@ -491,8 +493,14 @@ func makeLayoutRegexp(layout, value string) *regexp.Regexp {
layout = strings.Replace(layout, `%value%`, value, -1)
re := layoutRegexp[layout]
if re == nil {
re = regexp.MustCompile(layout)
layoutRegexp[layout] = re
// double check locking to fix issue: https://github.com/gorhill/cronexpr/issues/19
layoutRegexpLock.Lock()
defer layoutRegexpLock.Unlock()
re = layoutRegexp[layout]
if re == nil {
re = regexp.MustCompile(layout)
layoutRegexp[layout] = re
}
}
return re
}