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doc/HACKING/design: address comments from ahf

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Nick Mathewson 2019-10-14 15:53:04 -04:00
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34
doc/HACKING/design/00-overview.md
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@ -56,38 +56,38 @@ will be scheduled.
The codebase is divided into a few top-level subdirectories, each of
which contains several sub-modules.
src/ext -- Code maintained elsewhere that we include in the Tor
source distribution.
* `src/ext` -- Code maintained elsewhere that we include in the Tor
source distribution.
src/lib -- Lower-level utility code, not necessarily tor-specific.
* src/lib` -- Lower-level utility code, not necessarily tor-specific.
src/trunnel -- Automatically generated code (from the Trunnel)
tool: used to parse and encode binary formats.
* `src/trunnel` -- Automatically generated code (from the Trunnel
tool): used to parse and encode binary formats.
src/core -- Networking code that is implements the central parts of
* `src/core` -- Networking code that is implements the central parts of
the Tor protocol and main loop.
src/feature -- Aspects of Tor (like directory management, running a
* `src/feature` -- Aspects of Tor (like directory management, running a
relay, running a directory authorities, managing a list of nodes,
running and using onion services) that are built on top of the
mainloop code.
src/app -- Highest-level functionality; responsible for setting up
and configuring the Tor project, making sure all the lower-level
* `src/app` -- Highest-level functionality; responsible for setting up
and configuring the Tor daemon, making sure all the lower-level
modules start up when required, and so on.
src/tools -- Binaries other than Tor that we produce. Currently this
* `src/tools` -- Binaries other than Tor that we produce. Currently this
is tor-resolve, tor-gencert, and the tor_runner.o helper module.
src/test -- unit tests, regression tests, and a few integration
* `src/test` -- unit tests, regression tests, and a few integration
tests.
In theory, the above parts of the codebase are sorted from highest-level
to lowest-level, where high-level code is only allowed to invoke
lower-level code, and lower-level code never includes or depends on code
of a higher level. In practice, this refactoring is incomplete: The
modules in src/lib are well-factored, but there are many "upward
dependencies" in src/core and src/feature. We aim to eliminate those
In theory, the above parts of the codebase are sorted from highest-level to
lowest-level, where high-level code is only allowed to invoke lower-level
code, and lower-level code never includes or depends on code of a higher
level. In practice, this refactoring is incomplete: The modules in `src/lib`
are well-factored, but there are many layer violations ("upward
dependencies") in `src/core` and `src/feature`. We aim to eliminate those
over time.
### Some key high-level abstractions ###

6
doc/HACKING/design/01.00-lib-overview.md
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@ -85,9 +85,9 @@ level):
code is specifically written to avoid having to log, because the
logging module depends on it.
* `lib/container` -- General purpose containers, including dynamic arrays,
hashtables, bit arrays, weak-reference-like "handles", bloom
filters, and a bit more.
* `lib/container` -- General purpose containers, including dynamic arrays
("smartlists"), hashtables, bit arrays, weak-reference-like "handles",
bloom filters, and a bit more.
* `lib/trace` -- A general-purpose API for introducing
function-tracing functionality into Tor. Currently not much used.