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Jukka Laitinen a0efb1fefe sched/signal: Move dynamic allocation of pending signals to a safe place
The kmm_alloc can break the critical section, if it sleeps on the
heap mutex. If we run out of pending signal structures, allocate more
right after entering the critical section but before checking if the signal
needs to be added to the pending queue.

Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
2025-05-08 21:32:08 +08:00
.github ci: enable spelling checks (via codespell) 2025-05-05 12:34:39 +08:00
arch arch/avr/src/avrdx: added support for AVR128DA64 and AVR128DB64 chips 2025-05-08 15:58:18 +08:00
audio audio/composite: merge composite instance allocate to one times 2025-03-17 10:26:54 +01:00
binfmt libc/elf: rename modlib to libelf 2025-04-11 09:43:22 +08:00
boards boards/nucleo-f302r8/qenco: Disable CONFIG_LIBC_FLOATINGPOINT to free up flash space 2025-05-08 16:00:05 +08:00
cmake tools: Update Unix.mk and savedefconfig.cmake for CONFIG_ARCH_BOARD_COMMON 2025-05-02 09:30:34 -03:00
crypto crypto/xform.c: migrate to SPDX identifier 2024-12-19 14:48:18 +08:00
Documentation arm/sam34/boards/sam4e-ek: Migrate README to RST. 2025-05-08 19:27:23 +08:00
drivers drivers/video/fb.c: Add startup splashscreen option 2025-04-30 06:38:05 -03:00
dummy
fs fs/procfs: Improve subdirectory recognition 2025-05-02 09:28:06 -03:00
graphics move readv/writev to the kernel 2024-10-30 17:07:54 +08:00
include Clean up the nxmutex library 2025-05-08 16:00:05 +08:00
libs Clean up the nxmutex library 2025-05-08 16:00:05 +08:00
mm libc/elf: rename modlib to libelf 2025-04-11 09:43:22 +08:00
net net/tcp/tcp_conn.c: optimize the port conflict detection rules 2025-04-24 14:10:27 +08:00
openamp Remove all jira and changeid information from the kernel 2024-11-06 02:04:03 +08:00
pass1 Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
sched sched/signal: Move dynamic allocation of pending signals to a safe place 2025-05-08 21:32:08 +08:00
syscall sched/gettid: Move thread ID to TLS 2025-04-08 22:53:10 +08:00
tools tools: add permitted mixed case suffixes to nxstyle 2025-05-08 15:58:18 +08:00
video Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
wireless wireless/ieee802154: Replace direct access to semaphore value with nxsem_get_value 2025-04-17 20:13:40 +08:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines style: add codespell configuration for common spelling exceptions 2025-05-05 12:34:39 +08:00
.codespellrc codespell: Add RCALL 2025-05-08 15:58:18 +08:00
.gitignore gitignore: add Emacs auto-save files 2025-01-15 16:10:22 +08:00
.pre-commit-config.yaml pre-commit: enable codespell checks 2025-05-05 12:34:39 +08:00
.yamllint
AUTHORS AUTHORS: add Yamamoto Takashi 2024-11-04 22:29:22 +08:00
CMakeLists.txt Documentation: fix typo in comments 2025-04-11 22:31:30 +08:00
CONTRIBUTING.md 202503 Apache NuttX RTOS Contributing Guidelines update. 2025-03-17 08:30:37 -03:00
INVIOLABLES.md
Kconfig libc/elf: rename modlib to libelf 2025-04-11 09:43:22 +08:00
LICENSE libc string:Separate code. 2024-10-23 09:49:19 +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 Documentation: move ReleaseNotes 2023-09-26 20:41:00 +08:00

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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.