Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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Tiago Medicci Serrano 9cf7d80bab sched/mqueue: Enable receiving messages on an interrupt handler
The internal implementation of `file_mq_receive` did not allow
receiving a message from an interrupt handler. Although it is not
possible to wait for a message in an interrupt context, it is
perfectly possible to retrieve already-existing messages from the
message queue. This commit modifies file_mq_timedreceive_internal
to enable checking the message list and, if no messages exist, it
returns immediately. This enables receiving any existing messages
in an interrupt context.

Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>
2026-02-11 13:10:31 -05:00
.github tools: fix make host_info flag parsing and config string escaping 2026-02-05 14:23:19 +01:00
arch arch/tricore: initialize spinlock used by tricore systimer 2026-02-11 11:28:52 -03:00
audio nuttx/audio: clear apb buffer when playback dequeue 2026-02-05 08:22:18 -03:00
binfmt sched/task: move kernel stack allocation to task initialization 2026-01-18 23:05:11 +08:00
boards imx95: add board reset 2026-02-11 14:10:18 +01:00
cmake cmake(bugfix):change default compile obj extension to .o 2026-01-27 20:54:26 +08:00
crypto crypto/cryptosoft: Fix HMAC-SHA when a long key is used 2026-01-28 13:14:05 -03:00
Documentation docs/rasperrypi-pico-2: Small typo correction 2026-02-11 10:28:14 +01:00
drivers v4l2_cap: fix reqbuf return error when set count = 0. 2026-02-10 16:20:21 -05:00
dummy
fs fs/9pfs: use virtio_read_config_bytes() to read the tag in config space 2026-01-30 08:11:57 -03:00
graphics graphics/nxterm: Use small lock to protect resource in graphics. 2026-01-27 17:59:07 +08:00
include input: add keyboard matrix driver 2026-02-10 08:15:01 -03:00
libs libs/libc/machine/arm: add Cortex-M0/M23 support to arch_mcount 2026-02-04 03:03:45 +08:00
mm mm/mm_gran: fix data truncation by using size_t for mask 2026-02-06 08:16:33 -05:00
net net/netdev: a valid netdev for ipv4 should have ipv4 addr configured 2026-02-02 13:57:56 +08:00
openamp lib/rpmsg: add priority support for rpmsg endpoint 2026-01-30 07:50:11 -03:00
pass1 Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
sched sched/mqueue: Enable receiving messages on an interrupt handler 2026-02-11 13:10:31 -05:00
syscall syscall: add sched_note_event_ip syscall for instrumentation dump 2026-01-28 02:06:23 +08:00
tools tools: fix make host_info flag parsing and config string escaping 2026-02-05 14:23:19 +01:00
video Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
wireless net/wireless: fix compile warning 2025-12-25 18:05:33 +08:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines net/icmpv6: replace net_lock with conn_lock and conn_lock_dev 2025-12-29 09:42:18 +08:00
.codespellrc codespellrc: add ist to ignorelist 2025-10-14 17:42:01 +08:00
.editorconfig .editorconfig: fix character encoding property specification 2025-11-28 19:12:13 +08:00
.gitignore gitignore: add more vim swap files 2025-06-18 15:44:51 -04:00
.gitmessage docs/contributing: Add a commit message template 2025-06-03 17:33:24 +08:00
.pre-commit-config.yaml pre-commit: enable codespell checks 2025-05-05 12:34:39 +08:00
.yamllint
AUTHORS AUTHORS: add Michal Lenc 2025-12-03 08:46:33 -03:00
CMakeLists.txt boards/arm/stm32: Fix CMake build for protected mode on stm32f4discovery 2026-02-02 13:24:34 +08:00
CONTRIBUTING.md style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
INVIOLABLES.md
Kconfig Kconfig: Add ALLOW_CUSTOM_PERMISSIVE_COMPONENTS option 2026-01-20 02:15:19 +08:00
LICENSE style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
Makefile tools: migrate to SPDX identifier 2024-09-10 23:11:11 +08:00
NOTICE
README.md Gathering community recommendations 2023-10-28 13:55:56 +08:00
ReleaseNotes

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Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.

Getting Started

First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.

Documentation

You can find the current NuttX documentation on the Documentation Page.

Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.

The old NuttX documentation is still available in the Apache wiki.

Supported Boards

NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.

Contributing

If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.

License

The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.