diff options
Diffstat (limited to 'src/sync/pool.go')
| -rw-r--r-- | src/sync/pool.go | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/sync/pool.go b/src/sync/pool.go index ca7afdb12f..1ae70127ac 100644 --- a/src/sync/pool.go +++ b/src/sync/pool.go @@ -152,8 +152,8 @@ func (p *Pool) Get() interface{} { func (p *Pool) getSlow(pid int) interface{} { // See the comment in pin regarding ordering of the loads. - size := atomic.LoadUintptr(&p.localSize) // load-acquire - locals := p.local // load-consume + size := runtime_LoadAcquintptr(&p.localSize) // load-acquire + locals := p.local // load-consume // Try to steal one element from other procs. for i := 0; i < int(size); i++ { l := indexLocal(locals, (pid+i+1)%int(size)) @@ -198,8 +198,8 @@ func (p *Pool) pin() (*poolLocal, int) { // Since we've disabled preemption, GC cannot happen in between. // Thus here we must observe local at least as large localSize. // We can observe a newer/larger local, it is fine (we must observe its zero-initialized-ness). - s := atomic.LoadUintptr(&p.localSize) // load-acquire - l := p.local // load-consume + s := runtime_LoadAcquintptr(&p.localSize) // load-acquire + l := p.local // load-consume if uintptr(pid) < s { return indexLocal(l, pid), pid } @@ -226,7 +226,7 @@ func (p *Pool) pinSlow() (*poolLocal, int) { size := runtime.GOMAXPROCS(0) local := make([]poolLocal, size) atomic.StorePointer(&p.local, unsafe.Pointer(&local[0])) // store-release - atomic.StoreUintptr(&p.localSize, uintptr(size)) // store-release + runtime_StoreReluintptr(&p.localSize, uintptr(size)) // store-release return &local[pid], pid } @@ -282,3 +282,13 @@ func indexLocal(l unsafe.Pointer, i int) *poolLocal { func runtime_registerPoolCleanup(cleanup func()) func runtime_procPin() int func runtime_procUnpin() + +// The below are implemented in runtime/internal/atomic and the +// compiler also knows to intrinsify the symbol we linkname into this +// package. + +//go:linkname runtime_LoadAcquintptr runtime/internal/atomic.LoadAcquintptr +func runtime_LoadAcquintptr(ptr *uintptr) uintptr + +//go:linkname runtime_StoreReluintptr runtime/internal/atomic.StoreReluintptr +func runtime_StoreReluintptr(ptr *uintptr, val uintptr) uintptr |