History

Elliott Hughes 2109f12c3b Add strerrordesc_np() and strerrorname_np(). strerrordesc_np() isn't very useful (being just another name for strerror()), but strerrorname_np() lets you get "ENOSYS" for ENOSYS, which will make some of our test assertion messages clearer when we switch over from strerror(). This also adds `%#m` formatting to all the relevant functions. Test: treehugger Change-Id: Icfe07a39a307d591c3f4f2a09d008dc021643062		2023-09-27 11:21:12 -07:00
..
include/async_safe	linker: CHECK() or async_safe_fatal() rather than abort().	2020-06-10 14:49:28 -07:00
Android.bp	Open libasync_safe to any APEX	2022-09-02 22:43:56 +00:00
async_safe_log.cpp	Add strerrordesc_np() and strerrorname_np().	2023-09-27 11:21:12 -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.