utils: ipc: Add support for Flags

Add Flags<E> as a supported type in the IPA interface.

It is used in mojom with the [flags] attribute. Any field or parameter
type E that is prefixed with the [flags] attribute will direct the code
generator to generate the type name "Flags<E>" and appropriate
serialization/deserialization code for Flags<E> instead of for E.

It is usable and has been tested in struct members, function input and
output parameters, and Signal parameters. This does not add support for
returning Flags as direct return values.

Additionally, the [scopedEnum] attribute can be used on enum
definitions, which will instruct the code generator to convert it to an
enum class instead of a raw enum.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Paul Elder 2022-08-03 19:51:06 +09:00
parent fc6b5f49e1
commit 207c9e1c1d
8 changed files with 62 additions and 11 deletions

View file

@ -33,6 +33,15 @@ module libcamera;
* available for the type and there's no need to generate one
* - hasFd - struct fields or empty structs only
* - Designate that this field or empty struct contains a SharedFD
* - scopedEnum - enum definitions
* - Designate that this enum should be an enum class, as opposed to a pure
* enum
* - flags - struct fields or function parameters that are enums
* - Designate that this enum type E should be Flags<E> in the generated C++
* code
* - For example, if a struct field is defined as `[flags] ErrorFlag f;`
* (where ErrorFlag is defined as an enum elsewhere in mojom), then the
* generated code for this field will be `Flags<ErrorFlag> f`
*
* Rules:
* - If the type is defined in a libcamera C++ header *and* a (de)serializer is

View file

@ -13,6 +13,7 @@
#include <map>
#include <vector>
#include <libcamera/base/flags.h>
#include <libcamera/base/signal.h>
#include <libcamera/controls.h>