'const auto' and 'auto const' are interchangeable in C++. There are 446
occurrences of the former in the code base, and 67 occurrences of the
latter. Standardize on the winner.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
In order for ADL to find the function, it must be in the namespace of any of
its arguments. Previously, however, that was not the case, and it has only
really worked by accident and could be easily made to fail by introducing
other `operator<<` overloads.
For example, a user of this function in `libcamera::ipa` would no longer
compile after introducing an `operator<<` into the `libcamera::ipa`
namespace as that would essentially hide this overload, and without ADL
it would not be found.
So move the function into the `utils` namespace.
Fixes: 5055ca747c ("libcamera: utils: Add helper class for std::chrono::duration")
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
There is no real need for a function template. It is not defined in a
header file, so it has limited availability, and there exists only a
single instantion.
So convert it to use `std::ostream` directly, like most `operator<<`
in the code base.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
For example, `std::span` does not have a `const_iterator` typedef before
C++23, so compilation fails. Simply use `auto`. The `const` qualifier on
`items` should already ensure, that such an iterator will be be used that
the container deems appropriate for "const" access.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
At the moment every `LOG()` macro invocation results in a `LogMessage` being
created, the message serialized into an `std::stringstream`. Only in the
destructor is it actually checked whether the given `LogCategory` enables
the given log level.
This is not too efficient, it would be better to skip the log message
construction and all the `operator<<()` invocations if the message will
just be discarded.
This could be easily done if the `LOG()` macro accepted its arguments like a
traditional function as in that case an appropriate `if` statement can be
injected in a do-while loop. However, that is not the case, the `LOG()` macro
should effectively "return" a stream.
It is not possible inject an `if` statement directly as that would
lead to issues:
if (...)
LOG(...)
else
...
The `else` would bind the to the `if` in the `LOG()` macro. This is
diagnosed by `-Wdangling-else`.
An alternative approach would be to use a `for` loop and force a single
iteration using a boolean flag or similar. This is entirely doable but
I think the implemented approach is easier to understand.
This change implements the early log level checking using a `switch` statement
as this avoids the dangling else related issues. One small issue arises
because having a boolean controlling expression is diagnosed by clang
(`-Wswitch-bool`); the result is cast to `int` to avoid the warning.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
For debugging purposes, threads can be assigned a name, which eases
distinguishing between them in e.g. htop or gdb. This uses a
Linux-specific API for now which is limited to 15 characters (+ null
terminator), so truncation is done and names for existing thread
instantiations were chosen to be consise.
[Kieran: Apply checkstyle suggestions, rebase on proxy rework]
Signed-off-by: Schulz, Andreas <andreas.schulz2@karlstorz.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
The libcamera hex string adaptor specifies and casts each type
specifically to map the size of each type.
This needlessly repeats itself for each type and further more has a bug
with signed integer extension which causes values such as 0x80 to be
printed as 0xffffffffffffff80 instead.
Remove the template specialisations for each type, and unify with a
single templated constructor of the struct hex trait.
Suggested-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
`std::{begin,end}()` support C-style arrays, thus there is no need for
a second overload. The only reason it is currently needed is that the
trailing return type of the first overload uses `iterable.begin()`, which
leads to a substitution failure, so that overload is not considered.
So remove the array overload, and let CTAD deduce the `Base` template
parameter of `enumerate_adapter`, which will make things work for
arrays as well.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Sometimes there is a need to remove pending messages of an object. For example,
when the main purpose of a thread is to carry out work asynchronously using
invoke messages, then there might be a need to stop processing because some
kind of state has changed. This can be done in two main ways: flushing messages
or removing them. This changes enables the second option, which is useful if
the effects of the pending messages are no longer desired.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
In the near future we will add a SyncAdjustment control for adjusting
the frame duration via the sync algorithm. This control needs to be able
to take on a negative value, since the frame duration can be shortened
in addition to being extended. While the control is an int, it would be
convenient to be able to clamp it to frame duration limits, which are
usually handled as utils::Duration values internally. To allow this
using utils::Duration, add a unary negation operation to
utils::Duration. Also add a test for the operator.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Top-level `const` qualifiers are not useful, so avoid them. This is done
either by simply removing the top-level `const`, or making the function
return a reference to const where that is appropriate.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Use `std::{forward,move}` to forward the arguments, this enables the
use of move constructors, likely leading to less code and better runtime.
For example, move constructing a libstdc++ `std::shared_ptr` is noticeably
less code than copy constructing one.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
When no log category is specified, `nullptr` is passed, and
then the `_log()` function implementations replace that with
`LogCategory::defaultCategory()`. But since the call site always
knows the log category, this condition can be removed and the
`_LOG1()` macro can use `LogCategory::defaultCategory()`.
So remove the condition from the `_log()` implementations and
use references to refer to log categories.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Instead of copying, just move the returned value when the call is made
through an argument pack. This enables, e.g. `Object::invokeMethod()`
to be usable with functions returning types, such as`std::unique_ptr`,
that have no copy ctor/assignment. Since there are no other users of
the argument pack object, this is safe to do. Reference return types
are not supported, so a simple `std::move()` is sufficient.
Bug: https://bugs.libcamera.org/show_bug.cgi?id=273#c1
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Use `std::forward()` to forward the received arguments to enable the
potential use of move constructors instead of copy constructors.
Commit 0eacde623b ("libcamera: object: Avoid argument copies in invokeMethod()")
added the forwarding references to `invokeMethod()` but it did not add the
appropriate `std::forward()` calls, so copying could still take place
even if not necessary.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
The `dynamic_extent` specialization is currently not trivially copyable
unlike its standard counterpart, `std::span`. This is because the copy
assignment operator is user-defined. Explicitly default it just like
it is done in the main template definition.
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
The Thread::dispatchMessage() function supports filtering messages based
on their type. It can be useful to also dispatch only messages posted
for a specific receiver. Add an optional receiver argument to the
dispatchMessage() function to do so. When set to null (the default
value), the behaviour of the function is not changed.
This facility is actually used in followup patches.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Log categories may be added from any thread, so it is important to
synchronize access to the `Logger::categories_` list between its two
users: category creation (by LogCategory::create(), which calls
Logger::findCategory() and Logger::registerCategory()); and log level
setting (by Logger::logSetLevel()).
The LogCategory::create() function uses a mutex to serialize category
creation, but Logger::logSetLevel() can access `Logger::categories_`
concurrently without any protection. To fix the issue, move the mutex to
the Logger class, and use it to protect all accesses to the categories
list. This requires moving all the logic of LogCategory::create() to a
new Logger::findOrCreateCategory() function that combines both
Logger::findCategory() and Logger::registerCategory() in order to make
the two operations exacute atomically.
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Use `std::string_view` to avoid some largely unnecessary copies, and
to make string comparisong potentially faster by eliminating repeated
`strlen()` calls.
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
The severity of a log category may be changed from a different thread,
so it is important to ensure that the reads and writes happen atomically.
Using `std::memory_order_relaxed` should not introduce any synchronization
overhead, it should only guarantee that the operation itself is atomic.
Secondly, inline `LogCategory::setSeverity()`, as it is merely an
assignment, so going through a DSO call is a big pessimization.
`LogCategory` is not part of the public API, so this change has
no external effects.
Thirdly, assert that the atomic variable is lock free so as to ensure
it won't silently fall back to libatomic (or similar) on any platform.
If this assertion fails, this needs to be revisited.
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
C++17 guarantees move and copy elision in certain cases,
such as when returning a prvalue of the same type as the
return type of the function.
This is what the `_log()` functions do, thus there is no need
for the move constructor, so remove it. Furthermore, do not
just remove the implementation, but instead delete it as well.
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Objects of type `Object` and `Thread` have address identities, so they
should not be just moved/copied. And the special member functions
generated by the compiler do not do the right thing. So delete them.
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
__nodiscard was introduced for compatibility with C++14.
In C++17, there is an official attribute: [[nodiscard]].
Moreover, some libc implementations (like bionic) already define the
__nodiscard macro [1].
Since:
- libcamera builds with cpp_std=c++17
- [[nodiscard]] is already used in the android HAL (exif)
We should replace all usage __nodiscard of by [[nodiscard]] for
consistency.
Do the replacement and remove the no longer used compiler.h.
[1] https://android-review.googlesource.com/c/platform/bionic/+/3254860
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
If `cpp_debugstl` is enabled in the build configuration, then
libstdc++ will try to use `==` on operators in certain cases
to carry out extra checks. This leads to build failures because
`StringSplitter::iterator` has no `operator==`.
Implement `operator==`, and express `operator!=` in terms of it.
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
The LSP autoformatter doesn't like some of the current formatting, let's
make it happier. Note that not all of its suggestions were accepted
because readability is preferred and adjusting .clang-format may not be
easy or possible.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
The libcamera coding style groups the C and C++ standard library headers
in a single group. Fix the few offenders in the source tree.
While at it, add a missing blank line between header groups in a
separate location.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Without the change the build fails on upcoming `gcc-15` as:
In file included from ../src/libcamera/base/file.cpp:8:
../include/libcamera/base/file.h:62:33: error: 'uint8_t' was not declared in this scope
62 | ssize_t read(const Span<uint8_t> &data);
| ^~~~~~~
Signed-off-by: Sergei Trofimovich <slyich@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
The utils::hex() function is implemented for 32-bit and 64-bit integers,
but not for 8-bit and 16-bit. This causes a link error (possibly at
runtime for IPA modules due to lazy linking) when trying to print 8-bit
or 16-bit integers. Implement additional specializations to fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
libcamera will enable -Wmissing-declarations to catch mismatches between
function declarations and definitions. There is one offender in log.h:
when a category is defined with LOG_DEFINE_CATEGORY(), it generates a
function with no declaration. Fix it by declaring the function using
LOG_DECLARE_CATEGORY() as the first step of the category definition.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Source files in libcamera start by a comment block header, which
includes the file name and a one-line description of the file contents.
While the latter is useful to get a quick overview of the file contents
at a glance, the former is mostly a source of inconvenience. The name in
the comments can easily get out of sync with the file name when files
are renamed, and copy & paste during development have often lead to
incorrect names being used to start with.
Readers of the source code are expected to know which file they're
looking it. Drop the file name from the header comment blocks in all
remaining locations that were not caught by the automated script as they
are out of sync with the file name.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Source files in libcamera start by a comment block header, which
includes the file name and a one-line description of the file contents.
While the latter is useful to get a quick overview of the file contents
at a glance, the former is mostly a source of inconvenience. The name in
the comments can easily get out of sync with the file name when files
are renamed, and copy & paste during development have often lead to
incorrect names being used to start with.
Readers of the source code are expected to know which file they're
looking it. Drop the file name from the header comment block.
The change was generated with the following script:
----------------------------------------
dirs="include/libcamera src test utils"
declare -rA patterns=(
['c']=' \* '
['cpp']=' \* '
['h']=' \* '
['py']='# '
['sh']='# '
)
for ext in ${!patterns[@]} ; do
files=$(for dir in $dirs ; do find $dir -name "*.${ext}" ; done)
pattern=${patterns[${ext}]}
for file in $files ; do
name=$(basename ${file})
sed -i "s/^\(${pattern}\)${name} - /\1/" "$file"
done
done
----------------------------------------
This misses several files that are out of sync with the comment block
header. Those will be addressed separately and manually.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Several functions in libcamera classes are marked as thread-bound,
restricting the contexts in which those functions can be called. There
is no infrastructure to enforce these restrictions, causing difficult to
debug race conditions when they are not met by callers.
As a first step to solve this, add an assertThreadBound() protected
function to the Object class to test if the calling thread context is
valid, and use it in member functions of Object subclasses marked as
thread-bound. This replaces manual tests in a few locations.
The thread-bound member functions of classes that do not inherit from
Object are not checked, and neither are the functions of classes marked
as thread-bound at the class level. These issue should be addressed in
the future.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
