| commit | 92cc01ed9b9baab6e8b98e9af5108c27b31a3bd5 | [log] [tgz] |
|---|---|---|
| author | Mark Seaborn <mseaborn@google.com> | Wed May 09 16:52:14 2018 -0700 |
| committer | CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> | Mon May 14 16:07:27 2018 +0000 |
| tree | d730ae8f30d7a9128ce032ba80ce8781a4e7d4f0 | |
| parent | 50bfda1eddea481a551159efecbc5206c1a86fcd [diff] |
[kernel][dispatcher] Remove unneeded tracking of whether threads were woken This tracking was intended to prevent unnecessary context switches, but it's no longer effective. AutoReschedDisable is more effective for doing that. * Instead of passing reschedule=false in Event::Signal() and calling thread_reschedule() later, we can pass reschedule=true and then there's no need to call thread_reschedule() later. We can remove the return value from Event::Signal() and other methods. * ChannelDispatcher::MessageWaiter methods: remove unused return values. * Dispatcher: remove the kWokeThreads return flag. ZX-1472 Change-Id: I2b7d88f5c4c703e15df60d8fdecb712d5d220005
Zircon is the core platform that powers the Fuchsia OS. Zircon is composed of a microkernel (source in kernel/...) as well as a small set of userspace services, drivers, and libraries (source in system/...) necessary for the system to boot, talk to hardware, load userspace processes and run them, etc. Fuchsia builds a much larger OS on top of this foundation.
The canonical Zircon Git repository is located at: https://fuchsia.googlesource.com/zircon
A read-only mirror of the code is present at: https://github.com/fuchsia-mirror/zircon
The Zircon Kernel provides syscalls to manage processes, threads, virtual memory, inter-process communication, waiting on object state changes, and locking (via futexes).
Currently there are some temporary syscalls that have been used for early bringup work, which will be going away in the future as the long term syscall API/ABI surface is finalized. The expectation is that there will be about 100 syscalls.
Zircon syscalls are generally non-blocking. The wait_one, wait_many port_wait and thread sleep being the notable exceptions.
This page is a non-comprehensive index of the zircon documentation.