github.com/cloudwego/frugal@v0.1.15/internal/atm/rtx/memzero.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  )
    22  
    23  type MemZeroFn struct {
    24      Fn unsafe.Pointer
    25      Sz []uintptr
    26  }
    27  
    28  var (
    29      MemZero = asmmemzero()
    30  )
    31  
    32  func (self MemZeroFn) ForSize(n uintptr) unsafe.Pointer {
    33      return unsafe.Pointer(uintptr(self.Fn) + self.Sz[n / ZeroStep])
    34  }