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

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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
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2
lib/posix/posix.nim
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@ -1375,6 +1375,8 @@ var
## Share changes. ## Share changes.
MAP_PRIVATE* {.importc, header: "<sys/mman.h>".}: cint MAP_PRIVATE* {.importc, header: "<sys/mman.h>".}: cint
## Changes are private. ## 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 MAP_FIXED* {.importc, header: "<sys/mman.h>".}: cint
## Interpret addr exactly. ## Interpret addr exactly.
MS_ASYNC* {.importc, header: "<sys/mman.h>".}: cint MS_ASYNC* {.importc, header: "<sys/mman.h>".}: cint

4
lib/pure/memfiles.nim
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@ -54,7 +54,7 @@ proc mapMem*(m: var TMemFile, mode: TFileMode = fmRead,
nil, nil,
mappedSize, mappedSize,
if readonly: PROT_READ else: PROT_READ or PROT_WRITE, 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) m.handle, offset)
if result == cast[pointer](MAP_FAILED): if result == cast[pointer](MAP_FAILED):
osError(osLastError()) osError(osLastError())
@ -207,7 +207,7 @@ proc open*(filename: string, mode: TFileMode = fmRead,
nil, nil,
result.size, result.size,
if readonly: PROT_READ else: PROT_READ or PROT_WRITE, 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, result.handle,
offset) offset)