jochen
be92762969
The live tests reached one shared bus and assert, read and remove the mesh's own objects by their fixed names, so packages run in parallel deleted what each other read and the suite passed only one package at a time; a red suite read as noise. internal/testbus starts a server per test, linked in at the nats-server release go.mod pins, and a test holds that pin to the catalogue's bus image and to the facts snapshot's bus when there is one, so the tests never run a bus the mesh does not. The waiter test read a timing (the most connections held at one look) and now reads the state it means (the fewest held across the wait). make check runs the packages in parallel under the race detector, with a timeout.
104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
// Copyright 2026 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build darwin || linux || openbsd
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package unix
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import "unsafe"
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// minIovec is the size of the small initial allocation used by
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// Readv, Writev, etc.
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//
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// This small allocation gets stack allocated, which lets the
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// common use case of len(iovs) <= minIovec avoid more expensive
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// heap allocations.
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const minIovec = 8
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// appendBytes converts bs to Iovecs and appends them to vecs.
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func appendBytes(vecs []Iovec, bs [][]byte) []Iovec {
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for _, b := range bs {
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var v Iovec
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v.SetLen(len(b))
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if len(b) > 0 {
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v.Base = &b[0]
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} else {
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v.Base = (*byte)(unsafe.Pointer(&_zero))
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}
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vecs = append(vecs, v)
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}
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return vecs
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}
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// writevRaceDetect tells the race detector that the program
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// has read the first n bytes stored in iovecs.
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func writevRaceDetect(iovecs []Iovec, n int) {
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if !raceenabled {
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return
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}
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for i := 0; n > 0 && i < len(iovecs); i++ {
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m := min(int(iovecs[i].Len), n)
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n -= m
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if m > 0 {
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raceReadRange(unsafe.Pointer(iovecs[i].Base), m)
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}
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}
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}
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// readvRaceDetect tells the race detector that the program
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// has written to the first n bytes stored in iovecs.
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func readvRaceDetect(iovecs []Iovec, n int, err error) {
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if !raceenabled {
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return
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}
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for i := 0; n > 0 && i < len(iovecs); i++ {
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m := min(int(iovecs[i].Len), n)
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n -= m
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if m > 0 {
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raceWriteRange(unsafe.Pointer(iovecs[i].Base), m)
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}
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}
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if err == nil {
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raceAcquire(unsafe.Pointer(&ioSync))
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}
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}
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func Readv(fd int, iovs [][]byte) (n int, err error) {
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iovecs := make([]Iovec, 0, minIovec)
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iovecs = appendBytes(iovecs, iovs)
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n, err = readv(fd, iovecs)
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readvRaceDetect(iovecs, n, err)
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return n, err
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}
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func Preadv(fd int, iovs [][]byte, offset int64) (n int, err error) {
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iovecs := make([]Iovec, 0, minIovec)
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iovecs = appendBytes(iovecs, iovs)
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n, err = preadv(fd, iovecs, offset)
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readvRaceDetect(iovecs, n, err)
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return n, err
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}
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func Writev(fd int, iovs [][]byte) (n int, err error) {
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iovecs := make([]Iovec, 0, minIovec)
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iovecs = appendBytes(iovecs, iovs)
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if raceenabled {
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raceReleaseMerge(unsafe.Pointer(&ioSync))
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}
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n, err = writev(fd, iovecs)
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writevRaceDetect(iovecs, n)
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return n, err
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}
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func Pwritev(fd int, iovs [][]byte, offset int64) (n int, err error) {
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iovecs := make([]Iovec, 0, minIovec)
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iovecs = appendBytes(iovecs, iovs)
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if raceenabled {
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raceReleaseMerge(unsafe.Pointer(&ioSync))
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}
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n, err = pwritev(fd, iovecs, offset)
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writevRaceDetect(iovecs, n)
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return n, err
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}
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