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Squash a bunch of possible races

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This commit is contained in:
Daniel Oaks 2017-04-18 22:26:01 +10:00
parent 1977d03faf
commit c911ff2bcd
3 changed files with 78 additions and 27 deletions
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15
irc/whowas.go
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@ -4,10 +4,16 @@
package irc
import (
"sync"
)
type WhoWasList struct {
buffer []*WhoWas
start int
end int
accessMutex sync.RWMutex
}
type WhoWas struct {
@ -25,6 +31,9 @@ func NewWhoWasList(size uint) *WhoWasList {
}
func (list *WhoWasList) Append(client *Client) {
list.accessMutex.Lock()
defer list.accessMutex.Unlock()
list.buffer[list.end] = &WhoWas{
nicknameCasefolded: client.nickCasefolded,
nickname: client.nick,
@ -39,6 +48,9 @@ func (list *WhoWasList) Append(client *Client) {
}
func (list *WhoWasList) Find(nickname string, limit int64) []*WhoWas {
list.accessMutex.RLock()
defer list.accessMutex.RUnlock()
results := make([]*WhoWas, 0)
casefoldedNickname, err := CasefoldName(nickname)
@ -59,6 +71,9 @@ func (list *WhoWasList) Find(nickname string, limit int64) []*WhoWas {
}
func (list *WhoWasList) prev(index int) int {
list.accessMutex.RLock()
defer list.accessMutex.RUnlock()
index--
if index < 0 {
index += len(list.buffer)