go getentropy_darwin 源码
golang getentropy_darwin 代码
文件路径：/src/internal/syscall/unix/getentropy_darwin.go
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build darwin && !ios
package unix
import (
"internal/abi"
"syscall"
"unsafe"
)
//go:cgo_import_dynamic libc_getentropy getentropy "/usr/lib/libSystem.B.dylib"
func libc_getentropy_trampoline()
// GetEntropy calls the macOS getentropy system call.
func GetEntropy(p []byte) error {
_, _, errno := syscall_syscall(abi.FuncPCABI0(libc_getentropy_trampoline),
uintptr(unsafe.Pointer(&p[0])),
uintptr(len(p)),
0)
if errno != 0 {
return errno
}
return nil
}
//go:linkname syscall_syscall syscall.syscall
func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno)
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