Gregory Nutt
120d29b480
Update some Kconfig comments
2016-11-06 09:06:37 -06:00
Heesub Shin
8e94d8e7cc
Signal sent from work_signal() may interrupt the low priority worker thread that is already running. For example, the worker thread that is waiting for a semaphore could be woken up by the signal and break any synchronization assumption as a result. It also does not make any sense to send signal if it is already running and busy. This commit fixes it.
2016-11-06 08:00:12 -06:00
Gregory Nutt
796969f6b6
Update TODO. Provide do-nothing stubs for mutex attribute interfaces if features not enabled. pthread_cond includes a signaling semaphore and should call sem_setprotocol.
2016-11-05 11:06:52 -06:00
Gregory Nutt
6f1c5e7b43
Add some comments.
2016-11-05 09:44:29 -06:00
Gregory Nutt
4b0372e542
Missing # on endif
2016-11-03 21:27:52 -06:00
Gregory Nutt
73fc186beb
sem_setprotocol: Handle a case of missing proxy for sem_setprotocol. Reorder so that (1) this error is avoided, and (2) >No proxy is needed if priority inheritance is not enabled.
2016-11-03 18:51:38 -06:00
Gregory Nutt
0d5bd30943
Fix a type in include file name
2016-11-03 12:58:02 -06:00
Gregory Nutt
4c8ec0d2ca
include/nuttx/semaphore.h: Fix broken macros
2016-11-03 12:49:44 -06:00
Gregory Nutt
1da3a5fa61
sched: Disable priority inheritance on all semaphores used for signaling
2016-11-03 12:42:02 -06:00
Gregory Nutt
97bf82ee05
Semaphores: Provide macros for sem_setprotobol() and sem_getprotocol() if priority inheritance is not enabled. More SEM_PRIO_* definitions to include/nuttx/semaphore.h
2016-11-02 18:21:46 -06:00
Gregory Nutt
d5b4d848d3
Move protoypes for the non-standard include/semaphore.h file to the non-standard include/nuttx/semaphore.h with the other non-standard semaphore interfaces.
2016-11-02 14:43:03 -06:00
Gregory Nutt
b738a646ad
sem_getprotocol() can be in C library
2016-11-02 09:29:16 -06:00
Gregory Nutt
92d3022411
Add pthread_mutexattr_get/set_protocol and non-standard sem_get/set_protocol. These may use to enable or disable priority inheritance on a single semaphore.
2016-11-02 09:05:18 -06:00
Gregory Nutt
4997ec7a1e
ESP32 Core V2: Add an SMP configuration to support development (not yet usable).
2016-10-29 14:56:07 -06:00
Gregory Nutt
e6377641a8
sched/Kconfig: Add ranges to START_YEAR, MONTH, and DAY
2016-10-27 18:04:14 -06:00
Gregory Nutt
123c520db4
Correct time initialization for the case where time is initialized from settings in the .config file. The correct range for month (tm_mon) internally is 0-11, not 1-12 as it is in the .config file.
2016-10-27 08:36:24 -06:00
Gregory Nutt
6a20560ba2
Trivia fix to typo in comment
2016-10-26 12:29:36 -06:00
Gregory Nutt
3e13ed2400
Within the OS, when a thread obtains a semaphore count it must call sem_addholder() if CONFIG_PRIORITY_INHERITANCE is enabled. If a count is available, then sem_wait() calls sem_addholder(), otherwise it waited for the semaphore and called sem_addholder() when it eventually received the count.
...
This caused a problem when the thread calling sem_wait() was very low priority. When it received the count, there may be higher priority threads "hogging" the CPU that prevent the lower priority task from running and, as a result, the sem_addholder() may be delayed indefinitely.
The fix was to have sem_post() call sem_addholder() just before restarting the thread waiting for the semaphore count.
This problem was noted by Benix Vincent who also suggested the solution.
2016-10-26 07:23:15 -06:00
Gregory Nutt
8669183852
sched/pthread and task: When a pthread is started, there is a small bit of logic that will run on the thread of execution of the new pthread. In the case where the new pthread has a lower priority than the parent thread, then this could cause both the parent thread and the new pthread to be blocked at the priority of the lower priority pthread (assuming that CONFIG_PRIORITY_INHERITANCE is not selected).
...
This change temporarily boosts the priority of the new pthread to at least the priority of the new pthread to at least the priority of the parent thread. When that bit of logic has executed on the thread of execution of the new pthread, it will then drop to the correct priority (if necessary) before calling into the new pthread's entry point.
2016-10-01 11:38:22 -06:00
Gregory Nutt
75104b0808
Remove duplicate function prototype from wrong header file
2016-10-01 10:56:42 -06:00
Sagitta Li
9fa1024eef
vector table should have dimension NR_IRQS, not NR_IRQS+1
2016-09-22 07:56:12 -06:00
Gregory Nutt
f0b4705d57
Correct a comment
2016-09-15 13:10:42 -06:00
Gregory Nutt
e3bbfa2d85
mq_send() was not setting the errno value on certain failures to allocate a message
2016-09-15 12:42:24 -06:00
Gregory Nutt
368f241637
Correct some comments
2016-09-15 08:46:41 -06:00
Gregory Nutt
952268274a
sched/: Fix misplaced right bracket; remove redundant assertion.
2016-09-06 12:27:12 -06:00
Gregory Nutt
7582c2344c
sched/: Eliminate calculation of a possibly unused value.
2016-09-06 10:28:19 -06:00
Gregory Nutt
e034c78516
improve some assertions; add some comments.
2016-09-06 10:21:41 -06:00
Gregory Nutt
27919549f1
sched/: Simplify some child/parent logic
2016-09-06 08:40:55 -06:00
Gregory Nutt
05aa586aa6
sched/: Move fields related to parent/child task relationship out of TCB into group structure.
2016-09-06 08:28:31 -06:00
Gregory Nutt
858af4295c
The TCB nchildren field should not be incremented when pthreads are created.
2016-09-06 07:34:36 -06:00
Gregory Nutt
60b70f7dbb
Make xorshift128 re-entrant so that we do do have to suffer the overhad of serialization controls.
2016-08-21 07:47:53 -06:00
Gregory Nutt
53b2de18eb
Trivial typo fix
2016-08-20 13:23:41 -06:00
Gregory Nutt
300361539a
sched/sched_cpuload_oneshot: Use the oneshot timer with optional entropy to measuer cPU load if so configured.
2016-08-20 12:47:07 -06:00
Gregory Nutt
6f833be9d5
Separate XorShift128 PRNG from /dev/urandom and make it generally available.
2016-08-20 11:36:02 -06:00
Gregory Nutt
5ea77118aa
Explicitly initialize the group tg_exitsem with sem_init(). The existing logic worked because the correct initialization value is all zero, but it is better to initialize the semaphore explicitly. Noted by Jouko Holopainen.
2016-08-10 07:38:07 -06:00
Gregory Nutt
3404b3cb4a
sched/: Review and correct some stylistic inconsistencies
2016-08-07 08:32:11 -06:00
Gregory Nutt
18ce4ff57b
sched/: Review and correct some stylistic inconsistencies
2016-08-07 08:25:30 -06:00
Gregory Nutt
94d34bba47
Fix a typo in a Make.defs file
2016-07-28 09:46:28 -06:00
Gregory Nutt
309480d0f9
Merge branch 'timekeeping' of bitbucket.org:nuttx/nuttx
2016-07-28 09:34:00 -06:00
Gregory Nutt
7370d3171a
Move include/nuttx/lib.h to include/nuttx/lib/lib.h
2016-07-21 14:05:44 -06:00
Gregory Nutt
246773faa7
Rename CONFIG_SCHED_TIMEKEEPING to CONFIG_CLOCK_TIMEKEEPING. That is a better compartmentalized name.
2016-07-11 06:54:02 -06:00
Gregory Nutt
f47b69e1f0
Add support for adjtime system call
2016-07-10 16:55:32 -06:00
Gregory Nutt
c326b6320a
Add description of adjtime() from Linux man page
2016-07-10 16:47:06 -06:00
Max Neklyudov
8db29071da
timekeeping: initial implementation
2016-07-10 16:14:25 -06:00
Gregory Nutt
830af912a1
Add sig_raise()
2016-07-04 09:32:36 -06:00
Paul A. Patience
891113dac9
sched/semaphore: Fix setting EINVAL in sem_post() and sem_wait()
2016-06-28 10:15:52 -04:00
Gregory Nutt
62d8f839c7
SYSLOG: Now a two phase initialization. Some SYSLOG channels cannot be initialized until later in the bringup
2016-06-21 07:52:24 -06:00
Gregory Nutt
2a751068e6
Without lowsyslog() *llerr() is not useful. Eliminate and replace with *err().
2016-06-20 12:44:38 -06:00
Gregory Nutt
43eb04bb8f
Without lowsyslog() *llinfo() is not useful. Eliminate and replace with *info().
2016-06-20 11:59:15 -06:00
Gregory Nutt
f4c47636e7
SYSLOG: Debug output from the IDLE task should be forced like interrupt level output
2016-06-20 07:35:38 -06:00
