You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: bolt_unix_solaris.go
    path of file: ./repos/wgnetwork/vendor/go.etcd.io/bbolt
    
    the code of the file until where you have to start completion: package bbolt

import (
	"fmt"
	"syscall"
	"time"
	"unsafe"

	"golang.org/x/sys/unix"
)

// flock acquires an advisory lock on a file descriptor.
func flock(db *DB, exclusive bool, ti
    
func mmap(db *DB, sz int) error {
	// Map the data file to memory.
	b, err := unix.Mmap(int(db.file.Fd()), 0, sz, syscall.PROT_READ, syscall.MAP_SHARED|db.MmapFlags)
	if err != nil {
		return err
	}

	// Advise the kernel that the mmap is accessed randomly.
	if err := unix.Madvise(b, syscall.MADV_RANDOM); err != nil {
		return fmt.Errorf("madvise: %s", err)
	}

	// Save the original byte slice and convert to a byte array pointer.
	db.dataref = b
	db.data = (*[maxMapSize]byte)(unsafe.Pointer(&b[0]))
	db.datasz = sz
	return nil
}