github.com/cloudwego/frugal@v0.1.15/internal/atm/rtx/gcwb_go116_120.go (about)

     1  //go:build !go1.21
     2  // +build !go1.21
     3  
     4  /*
     5   * Copyright 2022 ByteDance Inc.
     6   *
     7   * Licensed under the Apache License, Version 2.0 (the "License");
     8   * you may not use this file except in compliance with the License.
     9   * You may obtain a copy of the License at
    10   *
    11   *     http://www.apache.org/licenses/LICENSE-2.0
    12   *
    13   * Unless required by applicable law or agreed to in writing, software
    14   * distributed under the License is distributed on an "AS IS" BASIS,
    15   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16   * See the License for the specific language governing permissions and
    17   * limitations under the License.
    18   */
    19  
    20  package rtx
    21  
    22  import (
    23      `unsafe`
    24  
    25      `github.com/cloudwego/frugal/internal/rt`
    26  )
    27  
    28  //go:linkname writeBarrier runtime.writeBarrier
    29  var writeBarrier uintptr
    30  
    31  //go:nosplit
    32  //go:linkname gcWriteBarrier runtime.gcWriteBarrier
    33  func gcWriteBarrier()
    34  
    35  var (
    36      V_pWriteBarrier  = unsafe.Pointer(&writeBarrier)
    37      F_gcWriteBarrier = rt.FuncAddr(gcWriteBarrier)
    38  )