memoryMap¶
| Source (upstream pre-purge) | Current | |
|---|---|---|
| File | consensus/ethash/ethash.go |
ethash.go |
| Symbol | memoryMap |
memoryMap |
| Ref | dde2da0ef~1 |
etc/v1.17.3-full-node |
3-way merge — purge → getc ← upstream¶
pre-purge
↗// memoryMap tries to memory map a file of uint32s for read only access.
func memoryMap(path string, lock bool) (*os.File, mmap.MMap, []uint32, error) {
file, err := os.OpenFile(path, os.O_RDONLY, 0644)
if err != nil {
return nil, nil, nil, err
}
mem, buffer, err := memoryMapFile(file, false)
if err != nil {
file.Close()
return nil, nil, nil, err
}
for i, magic := range dumpMagic {
if buffer[i] != magic {
mem.Unmap()
file.Close()
return nil, nil, nil, ErrInvalidDumpMagic
}
}
if lock {
if err := mem.Lock(); err != nil {
mem.Unmap()
file.Close()
return nil, nil, nil, err
}
}
return file, mem, buffer[len(dumpMagic):], err
}