drm_hwcomposer: Introduce SharedFd, use standard c++ RAII for UniqueFd

We use too much dup() system calls for present fence propagating.
Also when propagating acquire fence we use additional logic for
skipping such propagation for the validate/test cycle.

Both issues can be solved by introducing SharedFd, which will track
reference count of fd object.

After that the UniqueFd is used very rarely and can be simplified by
wrapping it into std::unique_ptr without caring too much of adding
an extra malloc/free operation.

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
23 files changed
tree: 02c8eb5f5c25f5a7f436f2c1455c34953220591f
  1. .ci/
  2. backend/
  3. bufferinfo/
  4. compositor/
  5. drm/
  6. hwc2_device/
  7. tests/
  8. utils/
  9. .clang-format
  10. .clang-tidy
  11. .gitlab-ci.yml
  12. Android.bp
  13. Makefile
  14. meson.build
  15. MODULE_LICENSE_APACHE2
  16. NOTICE
  17. README.md
README.md

drm_hwcomposer

Patches to drm_hwcomposer are very much welcome, we really want this to be the universal HW composer implementation for Android and similar platforms. So please bring on porting patches, bugfixes, improvements for documentation and new features.

A short list of contribution guidelines:

  • Submit changes via gitlab merge requests on gitlab.freedesktop.org.

  • drm_hwcomposer is Apache 2.0 Licensed and we require contributions to follow the developer's certificate of origin: http://developercertificate.org/.

  • When submitting new code please follow the naming conventions documented in the generated documentation. Also please make full use of all the helpers and convenience macros provided by drm_hwcomposer. The below command can help you with formatting of your patches:

    git diff | clang-format-diff-15 -p 1 -style=file
    
  • Hardware specific changes should be tested on relevant platforms before committing.

If you need inspiration, please checkout our TODO issues.

Happy hacking!