forth). A Go function called by C code may take C pointers as arguments,
and it may store non-pointer data, C pointers, or Go pointers to pinned
memory through those pointers. It may not store a Go pointer to unpinned
memory in memory pointed to by a C pointer (which again, implies that it
may not store a string, slice, channel, and so forth). A Go function

pkg syscall (darwin-arm64), const S_IREAD ideal-int
pkg syscall (darwin-arm64), const S_IRGRP = 32
pkg syscall (darwin-arm64), const S_IRGRP ideal-int
pkg syscall (darwin-arm64), const S_IROTH = 4
pkg syscall (darwin-arm64), const S_IROTH ideal-int
pkg syscall (darwin-arm64), const S_IRWXG = 56
pkg syscall (darwin-arm64), const S_IRWXG ideal-int
pkg syscall (darwin-arm64), const S_IRWXO = 7

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build ignore

// Compute Fibonacci numbers with two goroutines
// that pass integers back and forth.  No actual
// concurrency, just threads and synchronization
// and foreign code on multiple pthreads.

package main

import (
	big "."
	"runtime"
)