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Add comments for mmap package usage

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This commit is contained in:
bluewebgeek 2018-06-13 16:05:41 +08:00
parent 378d314b25
commit 318008331f
1 changed files with 2 additions and 1 deletions
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3
consensus/ethash/ethash.go
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@ -64,7 +64,8 @@ func isLittleEndian() bool {
}
// memoryMap tries to memory map a file of uint32s for read only access.
// mmap is a portable memory map package which would enable direct access for memory mapping files
// mmap is a portable memory map package which would enable direct access for
// memory mapping files
func memoryMap(path string) (*os.File, mmap.MMap, []uint32, error) {
file, err := os.OpenFile(path, os.O_RDONLY, 0644)
if err != nil {