98d937104e
mm/: Remove dangling space at the end of lines.
2017-06-28 13:31:21 -06:00
d9bd5ca05f
Update README and some C comments
2017-05-30 09:19:04 -06:00
e9c55d8f7d
IOBs: Fix a typing error mm/iob/iob.h mm/iob/iob_initialize.c
2017-05-27 08:03:00 -06:00
2c00825dcf
Porting Guide: Add description of IOBs.
2017-05-20 08:50:05 -06:00
f10e10e465
IOBs: Fix build break
...
Signed-off-by: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>
2017-05-18 13:59:03 +09:00
5ce2ece134
syslog: Add header file inclusion to eliminate a warning; mm/iob: private function needs static storage class.
2017-05-16 12:26:23 -06:00
6a3800f611
There can be a failure in IOB allocation to some asynchronous behavior caused by the use of sem_post(). Consider this scenario:
...
Task A holds an IOB. There are no further IOBs. The value of semcount is zero.
Task B calls iob_alloc(). Since there are not IOBs, it calls sem_wait(). The v
alue of semcount is now -1.
Task A frees the IOB. iob_free() adds the IOB to the free list and calls sem_post() this makes Task B ready to run and sets semcount to zero NOT 1. There is one IOB in the free list and semcount is zero. When Task B wakes up it would increment the sem_count back to the correct value.
But an interrupt or another task runs occurs before Task B executes. The interrupt or other tak takes the IOB off of the free list and decrements the semcount. But since semcount is then < 0, this causes the assertion because that is an invalid state in the interrupt handler.
So I think that the root cause is that there the asynchrony between incrementing the semcount. This change separates the list of IOBs: Currently there is only a free list of IOBs. The problem, I believe, is because of asynchronies due sem_post() post cause the semcount and the list content to become out of sync. This change adds a new 'committed' list: When there is a task waiting for an IOB, it will go into the committed list rather than the free list before the semaphore is posted. On the waiting side, when awakened from the semaphore wait, it will expect to find its IOB in the committed list, rather than free list.
In this way, the content of the free list and the value of the semaphore count always remain in sync.
2017-05-16 11:03:35 -06:00
0de294a586
Fix lots of occurrences of 'the the', 'the there', 'the these', 'the then', 'the they.
2017-05-11 13:35:56 -06:00
d3b9f5b37f
Syslog buffering: Use IOBs to buffer data, not an on-stack buffer
2017-05-10 17:36:08 -06:00
de6bffe713
Update some README files
2017-05-09 11:32:44 -06:00
2043e1a114
IOBs: Move from driver/iob to a better location in mm/iob
2017-05-09 07:35:30 -06:00
0064dc52e5
realloc(): When realloc() has to fall back to calling malloc(), size including overhead was being provided to malloc(), causing a slightly larger allocation than needed. Noted by initialkjc@yahoo.com
2017-03-28 07:23:46 -06:00
6f1c5e7b43
Add some comments.
2016-11-05 09:44:29 -06:00
43eb04bb8f
Without lowsyslog() *llinfo() is not useful. Eliminate and replace with *info().
2016-06-20 11:59:15 -06:00
0c8c7fecf0
Add _ to the beginning of all debug macros to avoid name collisions
2016-06-16 12:33:32 -06:00
cf4075c741
Missed macro definition in one case
2016-06-12 11:13:34 -06:00
823b4b0cff
Forget to define an info() macro
2016-06-12 11:11:08 -06:00
b29a4dd49c
audio/, crypto/, libnx/, and mm/: Change some err() ERRORS to warn() WARNINGS or info()
2016-06-12 09:46:23 -06:00
a1469a3e95
Add CONFIG_DEBUG_ERROR. Change names of *dbg() * *err()
2016-06-11 15:50:49 -06:00
e99301d7c2
Rename *lldbg to *llerr
2016-06-11 14:55:27 -06:00
86b79b33cf
Reserver the name 'err' for other purposes
2016-06-11 14:40:07 -06:00
1cdc746726
Rename CONFIG_DEBUG to CONFIG_DEBUG_FEATURES
2016-06-11 14:14:08 -06:00
fc3540cffe
Replace all occurrences of vdbg with vinfo
2016-06-11 11:59:51 -06:00
f8f7b7582c
Silence some warnings
2016-05-26 14:06:13 -04:00
c4493528a1
Remove some empty file section section header comments
2016-02-17 18:57:35 -06:00
241ab98c5b
Remove some empty file section section header comments
2016-02-17 18:31:56 -06:00
fccef49305
Cosmetic changes to comments
2016-02-15 13:48:08 -06:00
046e39e2c6
nuttx/mm and libc: Replace irqsave() with enter_critical_section(); replace irqrestore() with leave_critical_section()
2016-02-14 08:57:01 -06:00
f45166af32
SMP: Fix a IDLE task semaphore operation
2016-02-12 18:03:08 -06:00
40659d12df
Rename libxx_internal.h to libxx.h
2015-12-30 07:56:56 -06:00
b90da3f27b
waitpid: CRITICAL BUGFIX. Add a reference counting mechansim to prevent wait from using stale memory that was freed by the exiting task
2015-12-22 11:48:17 -06:00
bfc95c641f
stdlib: Fix forgotten FARs
2015-11-18 14:22:43 -05:00
06cd5b2fcc
mm, audio, crypto, graphics: Fix various spacing/alignment issues
2015-10-08 09:10:22 -06:00
af086c40ff
Remove dangling whitespace
2015-10-04 15:28:54 -06:00
0b12dbf95d
Fix some spacing problems
2015-10-04 15:04:00 -06:00
5b51a9fcdd
Standardize the width of all comment boxes in C files
2015-10-02 17:43:18 -06:00
cb9e27c3b0
Standardize naming used for public data and function groupings
2015-10-02 16:30:35 -06:00
9f108b7b63
Fix issues detected by clang
2015-09-10 20:59:43 -04:00
07e9a02af9
Forgot to add two files in previous commit
2015-07-10 08:46:13 -06:00
59cc4a7a7b
Protected mode: Redesign how the user space heap is accessed from the kernel code. It used to call memory management functions in user space via function pointers in the userspace interface. That is inefficient because the first thing that those memory management functions do is to trap back into the kernel to get the current PID. Worse, that operation can be fatal is certain fragile situations such as when a task is exitting.
...
The solution is to remove all of the memory management function calls from the interface. Instead, the interface exports the userspace heap structure and then kernel size implementations of those memory management functions will operate on the userspace heap structure. This avoids the unnecessary system calls and, more importantly, failures do to freeing memory when a test exits.
2015-07-10 08:37:02 -06:00
342f5fe33d
Fix references to the no-longer-existent misc/ directory in comments, README files, and documentation
2015-06-28 08:08:57 -06:00
0476d8168a
More missing semicolons after DEBUGASSERT
2015-05-27 13:32:39 -06:00
2aa80e06f5
Remove executable flag from more .c and .h files
2015-04-09 08:20:57 -06:00
a4a6917267
Fixes some issues found by the PX4 team using Coverity. From Pavel Krienko
2015-01-19 13:01:20 -06:00
9ac09db800
More fixes to problems noted by cppcheck. Some are kind of risky; some are real bugs.
2014-11-25 13:46:14 -06:00
f06289e4d5
If the INTR granule allocator mode is enabled, there is no
...
semaphore to destroy. From Lorenz Meier.
2014-11-12 06:56:32 -06:00
8634a5e41c
Fix a typo in a Kconfig file
2014-09-27 16:11:48 -06:00
b33c2d9cef
Move include/nuttx/mm.h to include/nuttx/mm/mm.h
2014-09-24 07:29:09 -06:00
1863370672
Move include/nuttx/shm.h to include/nuttx/mm/shm.h
2014-09-24 07:05:02 -06:00
2fa7431ee7
Move include/nuttx/gran.h to include/nuttx/mm/gran.h
2014-09-24 06:55:26 -06:00
Gregory Nutt