github.com/cloudwego/frugal@v0.1.7/internal/atm/rtx/gcwb.go (about)

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