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Update TODO.

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This commit is contained in:
Gregory Nutt 2019-02-28 15:06:41 -06:00
parent 9342aba0bc
commit 97cda1baca
1 changed files with 27 additions and 4 deletions
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@ -1,4 +1,4 @@
NuttX TODO List (Last updated February 15, 2019) NuttX TODO List (Last updated February 28, 2019)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This file summarizes known NuttX bugs, limitations, inconsistencies with This file summarizes known NuttX bugs, limitations, inconsistencies with
@ -14,7 +14,7 @@ nuttx/:
(1) Memory Management (mm/) (1) Memory Management (mm/)
(0) Power Management (drivers/pm) (0) Power Management (drivers/pm)
(5) Signals (sched/signal, arch/) (5) Signals (sched/signal, arch/)
(2) pthreads (sched/pthread) (3) pthreads (sched/pthread, libs/libc/pthread)
(0) Message Queues (sched/mqueue) (0) Message Queues (sched/mqueue)
(10) Kernel/Protected Build (10) Kernel/Protected Build
(3) C++ Support (3) C++ Support
@ -804,8 +804,8 @@ o Signals (sched/signal, arch/)
complained about it. Apparently the visibility of the problem is complained about it. Apparently the visibility of the problem is
very low. very low.
o pthreads (sched/pthreads) o pthreads (sched/pthreads libs/libc/pthread)
^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Title: PTHREAD_PRIO_PROTECT Title: PTHREAD_PRIO_PROTECT
Description: Extend pthread_mutexattr_setprotocol(). It should support Description: Extend pthread_mutexattr_setprotocol(). It should support
@ -896,6 +896,29 @@ o pthreads (sched/pthreads)
Priority: Low. This change would improve real-time performance of the Priority: Low. This change would improve real-time performance of the
OS but is not otherwise required. OS but is not otherwise required.
Title: PTHREAD SPINLOCK ISSUES
Description: Basic support for pthread spinlocks was added on 2019-02-28,
However, there are some issues related to the implementation
as it stands.
1. The Use is not fully verified. How are these interfaces
used? How should they be tested?
2. These interfaces depend on architecture specific support
support fraom each architecture that support is not be
fully available to the pthread library in all cases.
3. It is also restricted to CONFIG_BUILD_FLAT because the
critical test and set function (up_testset()) as
prototyped in include/nuttx/spinlock() does not permit an
inline function or macro to be used in user-mode
application space.
For these reasons, the selection is marked EXPERIMENTAL.
Status: Open
Priority: Low. These are new interfaces and not yet in wide use. The
use case for these interfaces is not well defined, but I
think it would be restricted to multi-core CPU implmentations
which are not widespread in the embedded world.
o Message Queues (sched/mqueue) o Message Queues (sched/mqueue)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^