Mercurial > hg
view tests/test-push-checkheads-pruned-B5.t @ 51930:bc9ed92d4753
util: make `mmapread()` work on Windows again
522b4d729e89 started referencing `mmap.MAP_PRIVATE`, but that's not available on
Windows, so `hg version` worked, but `make local` did not. That commit also
started calling the constructor with the fine-grained `flags` and `prot` args,
but those aren't available on Windows either[1] (though the backing C code
doesn't seem conditionalized to disallow usage of them).
I assume the change away from from the `access` arg was to provide the same
options, plus `MAP_POPULATE`. Looking at the source code[2], they're not quite
the same- `ACCESS_READ` is equivalent to `flags = MAP_SHARED` and `prot = PROT_READ`.
`MAP_PRIVATE` is only used with `ACCESS_COPY`, which allows read and write.
Therefore, we can't quite get the same baseline flags on Windows, but this was
the status quo ante and `MAP_POPULATE` is a Linux thing, so presumably it works.
I realize that typically the OS differences are abstracted into the platform
modules, but I'm leaving it here so that it is obvious what the differences are
between the platforms.
[1] https://docs.python.org/3/library/mmap.html#mmap.mmap
[2] https://github.com/python/cpython/blob/5e0abb47886bc665eefdcc19fde985f803e49d4c/Modules/mmapmodule.c#L1539
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Tue, 01 Oct 2024 15:00:39 -0400 |
parents | 5996640fc6fe |
children |
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==================================== Testing head checking code: Case B-5 ==================================== Mercurial checks for the introduction of new heads on push. Evolution comes into play to detect if existing branches on the server are being replaced by some of the new one we push. This case is part of a series of tests checking this behavior. Category B: simple case involving pruned changesets TestCase 5: multi-changeset branch, mix of pruned and superseded .. old-state: .. .. * 3 changeset branch .. .. new-state: .. .. * old head is pruned .. * old mid is superseded .. * old root is pruned .. .. expected-result: .. .. * push allowed .. .. graph-summary: .. .. B ⊗ .. | .. A ø⇠◔ A' .. | | .. B ⊗ | .. |/ .. ● $ . $TESTDIR/testlib/push-checkheads-util.sh Test setup ---------- $ mkdir B5 $ cd B5 $ setuprepos creating basic server and client repo updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd server $ mkcommit B0 $ mkcommit C0 $ cd ../client $ hg pull pulling from $TESTTMP/B5/server searching for changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files new changesets d73caddc5533:821fb21d0dd2 (2 drafts) (run 'hg update' to get a working copy) $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkcommit B1 created new head $ hg debugobsolete --record-parents `getid "desc(A0)"` 1 new obsolescence markers obsoleted 1 changesets 2 new orphan changesets $ hg debugobsolete `getid "desc(B0)"` `getid "desc(B1)"` 1 new obsolescence markers obsoleted 1 changesets $ hg debugobsolete --record-parents `getid "desc(C0)"` 1 new obsolescence markers obsoleted 1 changesets $ hg log -G --hidden @ 25c56d33e4c4 (draft): B1 | | x 821fb21d0dd2 (draft): C0 | | | x d73caddc5533 (draft): B0 | | | x 8aaa48160adc (draft): A0 |/ o 1e4be0697311 (public): root Actual testing -------------- $ hg push pushing to $TESTTMP/B5/server searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) 3 new obsolescence markers obsoleted 3 changesets $ cd ../..