github.com/cloudwego/frugal@v0.1.15/internal/rt/escape.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 rt
    18  
    19  import (
    20      `unsafe`
    21  )
    22  
    23  // NoEscape hides a pointer from escape analysis. NoEscape is
    24  // the identity function but escape analysis doesn't think the
    25  // output depends on the input. NoEscape is inlined and currently
    26  // compiles down to zero instructions.
    27  // USE CAREFULLY!
    28  //go:nosplit
    29  //goland:noinspection GoVetUnsafePointer
    30  func NoEscape(p unsafe.Pointer) unsafe.Pointer {
    31      x := uintptr(p)
    32      return unsafe.Pointer(x ^ 0)
    33  }