From 43297148b22b976d9cec0c56c863a704f3691c0e Mon Sep 17 00:00:00 2001 From: Unknwon Date: Tue, 30 Aug 2016 15:19:53 -0700 Subject: [PATCH] modules/sync: rename SingleInstancePool to ExclusivePool --- models/repo.go | 2 +- models/wiki.go | 2 +- ...gle_instance_pool.go => exclusive_pool.go} | 19 ++++++++++--------- 3 files changed, 12 insertions(+), 11 deletions(-) rename modules/sync/{single_instance_pool.go => exclusive_pool.go} (76%) diff --git a/models/repo.go b/models/repo.go index a26ba92482..8c6f86dafc 100644 --- a/models/repo.go +++ b/models/repo.go @@ -40,7 +40,7 @@ const ( _TPL_UPDATE_HOOK = "#!/usr/bin/env %s\n%s update $1 $2 $3 --config='%s'\n" ) -var repoWorkingPool = sync.NewSingleInstancePool() +var repoWorkingPool = sync.NewExclusivePool() var ( ErrRepoFileNotExist = errors.New("Repository file does not exist") diff --git a/models/wiki.go b/models/wiki.go index f62cd2ac79..bc8aaf666e 100644 --- a/models/wiki.go +++ b/models/wiki.go @@ -21,7 +21,7 @@ import ( "github.com/gogits/gogs/modules/sync" ) -var wikiWorkingPool = sync.NewSingleInstancePool() +var wikiWorkingPool = sync.NewExclusivePool() // ToWikiPageURL formats a string to corresponding wiki URL name. func ToWikiPageURL(name string) string { diff --git a/modules/sync/single_instance_pool.go b/modules/sync/exclusive_pool.go similarity index 76% rename from modules/sync/single_instance_pool.go rename to modules/sync/exclusive_pool.go index 01d95fd0b5..744cc7c996 100644 --- a/modules/sync/single_instance_pool.go +++ b/modules/sync/exclusive_pool.go @@ -8,14 +8,15 @@ import ( "sync" ) -// SingleInstancePool is a pool of non-identical instances +// ExclusivePool is a pool of non-identical instances // that only one instance with same identity is in the pool at a time. -// In other words, only instances with different identities can exist -// at the same time. +// In other words, only instances with different identities can be in +// the pool the same time. If another instance with same identity tries +// to get into the pool, it hangs until previous instance left the pool. // // This pool is particularly useful for performing tasks on same resource // on the file system in different goroutines. -type SingleInstancePool struct { +type ExclusivePool struct { lock sync.Mutex // pool maintains locks for each instance in the pool. @@ -29,9 +30,9 @@ type SingleInstancePool struct { count map[string]int } -// NewSingleInstancePool initializes and returns a new SingleInstancePool object. -func NewSingleInstancePool() *SingleInstancePool { - return &SingleInstancePool{ +// NewExclusivePool initializes and returns a new ExclusivePool object. +func NewExclusivePool() *ExclusivePool { + return &ExclusivePool{ pool: make(map[string]*sync.Mutex), count: make(map[string]int), } @@ -39,7 +40,7 @@ func NewSingleInstancePool() *SingleInstancePool { // CheckIn checks in an instance to the pool and hangs while instance // with same indentity is using the lock. -func (p *SingleInstancePool) CheckIn(identity string) { +func (p *ExclusivePool) CheckIn(identity string) { p.lock.Lock() lock, has := p.pool[identity] @@ -55,7 +56,7 @@ func (p *SingleInstancePool) CheckIn(identity string) { // CheckOut checks out an instance from the pool and releases the lock // to let other instances with same identity to grab the lock. -func (p *SingleInstancePool) CheckOut(identity string) { +func (p *ExclusivePool) CheckOut(identity string) { p.lock.Lock() defer p.lock.Unlock()