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modules/sync: rename SingleInstancePool to ExclusivePool
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@ -40,7 +40,7 @@ const (
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_TPL_UPDATE_HOOK = "#!/usr/bin/env %s\n%s update $1 $2 $3 --config='%s'\n"
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)
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var repoWorkingPool = sync.NewSingleInstancePool()
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var repoWorkingPool = sync.NewExclusivePool()
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var (
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ErrRepoFileNotExist = errors.New("Repository file does not exist")
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@ -21,7 +21,7 @@ import (
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"github.com/gogits/gogs/modules/sync"
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)
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var wikiWorkingPool = sync.NewSingleInstancePool()
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var wikiWorkingPool = sync.NewExclusivePool()
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// ToWikiPageURL formats a string to corresponding wiki URL name.
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func ToWikiPageURL(name string) string {
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@ -8,14 +8,15 @@ import (
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"sync"
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)
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// SingleInstancePool is a pool of non-identical instances
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// ExclusivePool is a pool of non-identical instances
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// that only one instance with same identity is in the pool at a time.
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// In other words, only instances with different identities can exist
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// at the same time.
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// In other words, only instances with different identities can be in
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// the pool the same time. If another instance with same identity tries
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// to get into the pool, it hangs until previous instance left the pool.
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//
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// This pool is particularly useful for performing tasks on same resource
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// on the file system in different goroutines.
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type SingleInstancePool struct {
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type ExclusivePool struct {
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lock sync.Mutex
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// pool maintains locks for each instance in the pool.
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@ -29,9 +30,9 @@ type SingleInstancePool struct {
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count map[string]int
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}
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// NewSingleInstancePool initializes and returns a new SingleInstancePool object.
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func NewSingleInstancePool() *SingleInstancePool {
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return &SingleInstancePool{
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// NewExclusivePool initializes and returns a new ExclusivePool object.
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func NewExclusivePool() *ExclusivePool {
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return &ExclusivePool{
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pool: make(map[string]*sync.Mutex),
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count: make(map[string]int),
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}
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@ -39,7 +40,7 @@ func NewSingleInstancePool() *SingleInstancePool {
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// CheckIn checks in an instance to the pool and hangs while instance
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// with same indentity is using the lock.
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func (p *SingleInstancePool) CheckIn(identity string) {
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func (p *ExclusivePool) CheckIn(identity string) {
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p.lock.Lock()
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lock, has := p.pool[identity]
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@ -55,7 +56,7 @@ func (p *SingleInstancePool) CheckIn(identity string) {
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// CheckOut checks out an instance from the pool and releases the lock
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// to let other instances with same identity to grab the lock.
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func (p *SingleInstancePool) CheckOut(identity string) {
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func (p *ExclusivePool) CheckOut(identity string) {
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p.lock.Lock()
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defer p.lock.Unlock()
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