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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-12-13 17:25:33 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-12-13 17:25:33 -0600 |
| commit | 8897acab5799264ff04f265189ec9ac1bafc6c83 (patch) | |
| tree | 45d8382335e21812db1c94f3a4c3b17211526f14 /nuttx/TODO | |
| parent | cc3ccf9e7489b77759c0b2df64904f92719ab1e8 (diff) | |
| download | nuttx-8897acab5799264ff04f265189ec9ac1bafc6c83.tar.gz nuttx-8897acab5799264ff04f265189ec9ac1bafc6c83.tar.bz2 nuttx-8897acab5799264ff04f265189ec9ac1bafc6c83.zip | |
Update TODO list
Diffstat (limited to 'nuttx/TODO')
| -rw-r--r-- | nuttx/TODO | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/nuttx/TODO b/nuttx/TODO index 251279d27..ccf664ef5 100644 --- a/nuttx/TODO +++ b/nuttx/TODO @@ -196,7 +196,7 @@ o Task/Scheduler (sched/) threads should always be safe (or at least as unsafe) as under Unix because the model is complete for pthreads... - "So, in my opinion, this is a generic system issue, not + "So, in my opinion, this is a generic system issue, not specific to the serial driver. I could also implement logic to release all semaphores held by a thread when it exits -- but only if priority inheritance is enabled; @@ -213,6 +213,22 @@ o Task/Scheduler (sched/) "I think that the system needs to automatically release any semaphores held by a thread being killed asynchronously? It seems necessary to me." + + UPDATE; The logic enabled when priority inheritance is + enabled for this purpose is insufficient. It provides + hooks so that given a semaphore it can traverse all + holders. What is needed would be logic so that given + a task, you can traverse all semaphores held by the task, + releasing each semaphore cound held by the exiting task. + Nothing like this exists now so that solution is not + imminent. + + UPDATE: The basic fix to release the semaphore count if + a thread is killed via pthread_cancel() or task_delete() + has been implemented (2014-12-13). See the new file: + sched/semaphore/sem_recover.c However, the general + issue of freeing semaphores when a thread exists still + exists. Status: Open Priority: Medium-ish |