rclone/lib/mmap/mmap.go

31 lines
820 B
Go

// Package mmap provides memory mapped related utilities.
package mmap
import "os"
// PageSize is the minimum allocation size. Allocations will use at
// least this size and are likely to be multiplied up to a multiple of
// this size.
var PageSize = os.Getpagesize()
// MustAlloc allocates size bytes and returns a slice containing them. If
// the allocation fails it will panic. This is best used for
// allocations which are a multiple of the PageSize.
func MustAlloc(size int) []byte {
mem, err := Alloc(size)
if err != nil {
panic(err)
}
return mem
}
// MustFree frees buffers allocated by Alloc. Note it should be passed
// the same slice (not a derived slice) that Alloc returned. If the
// free fails it will panic.
func MustFree(mem []byte) {
err := Free(mem)
if err != nil {
panic(err)
}
}