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Kirill Smelkov
wendelin.core
Commits
39f1bd67
Commit
39f1bd67
authored
Jul 16, 2019
by
Kirill Smelkov
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02fa982f
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wcfs/__init__.py
wcfs/__init__.py
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wcfs/__init__.py
View file @
39f1bd67
...
...
@@ -168,9 +168,11 @@ def _pinner(wconn, ctx):
f
.
pinned
[
req
.
blk
]
=
req
.
at
# mmap creates file mapping representing file data as of wconn.at database state.
# mmap creates file mapping representing file
[blk_start +blk_len)
data as of wconn.at database state.
@
func
(
Conn
)
def
mmap
(
wconn
,
foid
,
blk
,
blklen
):
# -> Mapping
def
mmap
(
wconn
,
foid
,
blk_start
,
blk_len
):
# -> Mapping
assert
blk_len
>=
0
blk_stop
=
blk_start
+
blk_len
with
wconn
.
_filemu
:
f
=
wconn
.
_filetab
.
get
(
foid
)
if
f
is
None
:
...
...
@@ -186,8 +188,11 @@ def mmap(wconn, foid, blk, blklen): # -> Mapping
# XXX relock wconn -> f ?
# create memory with head/f mapping and applied pins
mem
=
mm
.
map_ro
(
f
.
headf
.
fileno
(),
blk
*
f
.
blksize
,
blklen
*
f
.
blksize
)
mmap
=
_Mapping
(
f
,
blk_start
,
mem
)
mem
=
mm
.
map_ro
(
f
.
headf
.
fileno
(),
blk_start
*
f
.
blksize
,
blk_len
*
f
.
blksize
)
mmap
=
_Mapping
()
mmap
.
file
=
f
mmap
.
blk_start
=
blk_start
mmap
.
mem
=
mem
for
blk
,
rev
in
f
.
pinned
.
items
():
# XXX keep f.pinned ↑blk and use binary search?
if
not
(
blk_start
<=
blk
<
blk_stop
):
continue
# blk out of this mapping
...
...
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