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device: simplify structure of handles array

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Force the inclusion of a `DEVICE_HANDLE_SEP` at the end of the
devicetree dependency section of the array. This lets us simplify the
implementation of `device_required_handles_get`, as there is only one
symbol the section ends with.

This does not use any extra ROM as the array is padded out to the
original size with `DEVICE_HANDLE_ENDS` anyway.

Also adds a description of the array format where the array is
instantiated.

Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
This commit is contained in:
Jordan Yates 2021-08-20 18:43:38 +10:00 • committed by Anas Nashif
commit ec331c6fe2
2 changed files with 19 additions and 3 deletions
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3
scripts/gen_handles.py
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@ -294,10 +294,11 @@ def main():
dep_paths.append(dn.path)
else:
dep_paths.append('(%s)' % dn.path)
# Force separator to signal start of injected dependencies
hdls.append(DEVICE_HANDLE_SEP)
if len(hs.ext_deps) > 0:
# TODO: map these to something smaller?
ext_paths.extend(map(str, hs.ext_deps))
hdls.append(DEVICE_HANDLE_SEP)
hdls.extend(hs.ext_deps)
# When CONFIG_USERSPACE is enabled the pre-built elf is