tree: 4e2ccdad31de4c3eab3af958a8af23b56ebe69e1 [path history] [tgz]
  1. Android.bp
  2. README.md
  3. async_safe_log.cpp
  4. include/
libc/async_safe/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.