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platform_bionic/libc/async_safe
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Jingwen Chen c57947860d bp2build: remove some bp2build_available props, use package_allowlist instead. 
Test: build/bazel/scripts/milestone-2/demo.sh full

Test: bazel query //bionic/...
Change-Id: I737574766be898279d8bf6f3f0adb43dcc40c220
2021-03-19 02:06:27 -04:00
..
include/async_safe linker: CHECK() or async_safe_fatal() rather than abort(). 2020-06-10 14:49:28 -07:00
Android.bp bp2build: remove some bp2build_available props, use package_allowlist instead. 2021-03-19 02:06:27 -04:00
async_safe_log.cpp async_safe: don't call libc's socket. 2020-08-21 14:23:57 -07:00
README.md Add a README.md for async_safe 2020-01-17 12:12:26 -08:00

README.md

async_safe logging

This library provides an async_safe implementation for formatting and writing log messages to logd.

Note that the liblog implementation connects a single socket to logd and uses a RWLock to manage it among threads, whereas these functions connect to liblog for each log message. While it's beneficial to have this lock-free and therefore async_safe mechanism to write to logd, connecting a socket for each message does not scale well under load. It was also determined to be too costly to connect a socket for each thread as some processes, such as system_server, have over 100 threads. Therefore, we maintain these two separate mechanisms.