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Fix 64-bit atomic operations on 32-bit machines (#19531) (#19532) 

- Backport #19531
  - Doing 64-bit atomic operations on 32-bit machines is a bit tricky by golang, as they can only be done under certain set of conditions(https://pkg.go.dev/sync/atomic#pkg-note-BUG).
  - This PR fixes such case whereby the conditions weren't met, it moves the int64 to the first field of the struct, which will 64-bit operations happening on this property on 32-bit machines.
  - Resolves #19518
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Gusted 2022-04-27 15:32:28 +00:00 committed by GitHub
parent 928b603d19
commit 1465e0cbb2
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1 changed files with 4 additions and 1 deletions
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5
modules/queue/workerpool.go
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@ -19,6 +19,10 @@ import (
// they use to detect if there is a block and will grow and shrink in // they use to detect if there is a block and will grow and shrink in
// response to demand as per configuration. // response to demand as per configuration.
type WorkerPool struct { type WorkerPool struct {
// This field requires to be the first one in the struct.
// This is to allow 64 bit atomic operations on 32-bit machines.
// See: https://pkg.go.dev/sync/atomic#pkg-note-BUG & Gitea issue 19518
numInQueue int64
lock sync.Mutex lock sync.Mutex
baseCtx context.Context baseCtx context.Context
baseCtxCancel context.CancelFunc baseCtxCancel context.CancelFunc
@ -32,7 +36,6 @@ type WorkerPool struct {
blockTimeout time.Duration blockTimeout time.Duration
boostTimeout time.Duration boostTimeout time.Duration
boostWorkers int boostWorkers int
numInQueue int64
} }
// WorkerPoolConfiguration is the basic configuration for a WorkerPool // WorkerPoolConfiguration is the basic configuration for a WorkerPool