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This is a one-time tree wide reformatting to ensure consistency
going forward.
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This allows copying the state from one OstreeAsyncProgress object to
another, atomically, without invoking the callback. This is needed in
libflatpak, in order to chain OstreeAsyncProgress objects so that you
can still receive progress updates when iterating a different
GMainContext than the one that the OstreeAsyncProgress object was
created under.
See https://github.com/flatpak/flatpak/pull/3211 for the application of
this API.
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SPDX License List is a list of (common) open source
licenses that can be referred to by a “short identifier”.
It has several advantages compared to the common "license header texts"
usually found in source files.
Some of the advantages:
* It is precise; there is no ambiguity due to variations in license header
text
* It is language neutral
* It is easy to machine process
* It is concise
* It is simple and can be used without much cost in interpreted
environments like java Script, etc.
* An SPDX license identifier is immutable.
* It provides simple guidance for developers who want to make sure the
license for their code is respected
See http://spdx.org for further reading.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Closes: #1439
Approved by: cgwalters
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We added a `.dir-locals.el` in commit: 9a77017d87b74c5e2895cdd64ad098018929403f
There's no need to have it per-file, with that people might think
to add other editors, which is the wrong direction.
Closes: #1206
Approved by: jlebon
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OstreeAsyncProgress is thread-safe: it can have keys changed by one
thread while another is getting the same keys (modulo some locking
contention). However, the thread safety is done at the function call
level: if some code calls an OstreeAsyncProgress getter several times,
the key fetches are not atomic with respect to each other.
In the case of contention on the lock, this can result in consumers of
OstreeAsyncProgress data seeing an inconsistent state between the
properties they query, which could result in progress reporting
inaccuracies.
In the uncontested case, this results in the OstreeAsyncProgress lock
being locked and unlocked many times more than necessary.
Try to improve this by adding new API, which supports getting and
setting multiple keys atomically:
• ostree_async_progress_get()
• ostree_async_progress_set()
The new API uses GVariants and varargs: keys are passed as a
GVariantType string followed by arguments as for g_variant_new() or
g_variant_get(), followed by the next key, etc.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Closes: #819
Approved by: cgwalters
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OstreeAsyncProgress currently does some contortions to try and avoid
allocating space for guints and guint64s (on 64-bit platforms), but this
means it uses two GHashTables. A GHashTable allocates 8 buckets even
when empty. Given that the largest usage of OstreeAsyncProgress in
libostree puts 13 uints and 5 uint64s in it, this optimisation does not
save significant (if any) memory.
Instead, change OstreeAsyncProgress to store values internally as
GVariants, and expose this with some new API:
• ostree_async_progress_get_variant()
• ostree_async_progress_set_variant()
Each GVariant is allocated on the heap. As they are immutable, they are
thread-safe once returned by a getter.
The existing API continues to work as before, except in the case where a
key is set/got as both a uint and a uint64 — there will now be a
collision (and a GVariant type checking failure) whereas previously
there was no collision. Nothing in OSTree uses OstreeAsyncProgress this
way though.
The new API can be used to share more complex data via the progress API.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Closes: #819
Approved by: cgwalters
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As rpm-ostree evolves, it keeps driving API additions to libostree.
This creates a relatively tight coupling.
However, if delivering via e.g. RPM, unless one manually remembers to
increment the `Requires:` in the spec file, it's possible for the two
to become desynchronized.
RPM handles versioned symbols and will ensure a dependency if the
application starts using a newer version.
To implement this, switch to `-fvisibility=hidden`, along with an
annotation in the header, and finally add a `.sym` file.
This matches what other projects like systemd and libvirt do.
Although rather than attempting to retroactively version symbols, glom
them all onto the current one.
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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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Since OstreeAsyncProgress queues to the mainloop, we might "lose" the
last message. Give callers a way to force a flush.
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Several APIs in libostree were moved there from the commandline code,
and have hardcoded g_print() for progress and notifications. This
isn't useful for people who want to write PackageKit backends, custom
GUIs and the like.
From what I can tell, there isn't really a winning precedent in GLib
for progress notifications.
PackageKit has the model where the source has GObject properties that
change as async ops execute, which isn't bad...but I'd like something
a bit more general where say you can have multiple outstanding async
ops and sensibly track their state.
So, OstreeAsyncProgress is basically a threadsafe property bag with a
change notification signal.
Use this new API to move the GSConsole usage (i.e. g_print()) out from
libostree/ and into ostree/.
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