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Update TODO list

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Gregory Nutt 2016-12-11 07:50:05 -06:00
parent d648f9c8b4
commit baaa5f7cb8
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@ -1,4 +1,4 @@
NuttX TODO List (Last updated December 8, 2016)
NuttX TODO List (Last updated December 11, 2016)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This file summarizes known NuttX bugs, limitations, inconsistencies with
@ -9,7 +9,7 @@ issues related to each board port.
nuttx/:
(13) Task/Scheduler (sched/)
(12) Task/Scheduler (sched/)
(1) SMP
(1) Memory Management (mm/)
(1) Power Management (drivers/pm)
@ -165,45 +165,6 @@ o Task/Scheduler (sched/)
incompatibilities could show up in porting some code).
Priority: Low
Title: REMOVE TASK_DELETE
Description: Need to remove asychronous fix task_delete(). This interface
is non-standard and not safe. Arbitrary deleting tasks can
cause serious problems such as memory leaks and resources like
semaphores left in bad states.
Task/process exit callbacks registered via atexit() or
on_exit() will not work correctly with task_delete(): In
that case the callback would execute in the context the
caller of task_delete() cancel, not in the context of the
exiting task (or process).
Better to remove task_delete() than to retain it as a latent
bug.
Currently used within the OS and also part of the
implementation of pthread_cancel() and task_restart() (which
should also go for the same reasons). It is used in
NxWM::CNxConsole to terminate console tasks and also in
apps/netutils/thttpd to kill CGI tasks that timeout. So not
so simple to remove.
Option: With CONFIG_CANCELLATION_POINTS=y task_delete()
does not do asynchronous deletion but should rather do the
same kind of synchronization such as the pthread cancellation
points. In this configuration, none of the issues above
apply. It is only the asynchronous task deletion that cannot
be supported. These helper functions are also available to
help manage task deletion:
int task_setcancelstate(int state, FAR int *oldstate);
int task_setcanceltype(int type, FAR int *oldtype);
void task_testcancel(void);
Which are analogous to the similarly named pthread_ interfaces.
Status: Open
Priority: Low and not easily removable.
Title: RELEASE SEMAPHORES HELD BY CANCELED THREADS:
Description: Commit: fecb9040d0e54baf14b729e556a832febfe8229e: "In
case a thread is doing a blocking operation (e.g. read())