jyapayne/Nim
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add automatic MAP_POPULATE flag for opening read_only (MAP_PRIVATE) and shared (MAP_SHARED) mmap files.

Browse source
This commit is contained in:
Nick Greenfield 2014-07-23 11:25:21 -07:00
commit 272fd42c97
2 changed files with 4 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
lib/posix/posix.nim
View file

@ -1375,6 +1375,8 @@ var
## Share changes.
MAP_PRIVATE* {.importc, header: "<sys/mman.h>".}: cint
## Changes are private.
MAP_POPULATE* {.importc, header: "<sys/mman.h>".}: cint
## Populate (prefault) page tables for a mapping.
MAP_FIXED* {.importc, header: "<sys/mman.h>".}: cint
## Interpret addr exactly.
MS_ASYNC* {.importc, header: "<sys/mman.h>".}: cint

4
lib/pure/memfiles.nim
View file

@ -54,7 +54,7 @@ proc mapMem*(m: var TMemFile, mode: TFileMode = fmRead,
nil,
mappedSize,
if readonly: PROT_READ else: PROT_READ or PROT_WRITE,
if readonly: MAP_PRIVATE else: MAP_SHARED,
if readonly: (MAP_PRIVATE or MAP_POPULATE) else: (MAP_SHARED or MAP_POPULATE),
m.handle, offset)
if result == cast[pointer](MAP_FAILED):
osError(osLastError())
@ -207,7 +207,7 @@ proc open*(filename: string, mode: TFileMode = fmRead,
nil,
result.size,
if readonly: PROT_READ else: PROT_READ or PROT_WRITE,
if readonly: MAP_PRIVATE else: MAP_SHARED,
if readonly: (MAP_PRIVATE or MAP_POPULATE) else: (MAP_SHARED or MAP_POPULATE),
result.handle,
offset)