golang.org/x/net@v0.25.1-0.20240516223405-c87a5b62e243/internal/socket/race.go (about)

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build race
     6  
     7  package socket
     8  
     9  import (
    10  	"runtime"
    11  	"unsafe"
    12  )
    13  
    14  // This package reads and writes the Message buffers using a
    15  // direct system call, which the race detector can't see.
    16  // These functions tell the race detector what is going on during the syscall.
    17  
    18  func (m *Message) raceRead() {
    19  	for _, b := range m.Buffers {
    20  		if len(b) > 0 {
    21  			runtime.RaceReadRange(unsafe.Pointer(&b[0]), len(b))
    22  		}
    23  	}
    24  	if b := m.OOB; len(b) > 0 {
    25  		runtime.RaceReadRange(unsafe.Pointer(&b[0]), len(b))
    26  	}
    27  }
    28  func (m *Message) raceWrite() {
    29  	for _, b := range m.Buffers {
    30  		if len(b) > 0 {
    31  			runtime.RaceWriteRange(unsafe.Pointer(&b[0]), len(b))
    32  		}
    33  	}
    34  	if b := m.OOB; len(b) > 0 {
    35  		runtime.RaceWriteRange(unsafe.Pointer(&b[0]), len(b))
    36  	}
    37  }