github.com/zuoyebang/bitalostable@v1.0.1-0.20240229032404-e3b99a834294/internal/rawalloc/rawalloc_go1.9.go (about)

     1  // Copyright 2018 The Cockroach Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
    12  // implied. See the License for the specific language governing
    13  // permissions and limitations under the License.
    14  
    15  //go:build gc && go1.9
    16  // +build gc,go1.9
    17  
    18  package rawalloc
    19  
    20  import "unsafe"
    21  
    22  // The go:linkname directives provides backdoor access to private functions in
    23  // the runtime. Below we're accessing the mallocgc function. Note that this
    24  // access is necessarily tied to a specific Go release which is why this file
    25  // is protected by a build tag.
    26  
    27  //go:linkname mallocgc runtime.mallocgc
    28  func mallocgc(size uintptr, typ unsafe.Pointer, needzero bool) unsafe.Pointer