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104 Commits

Author SHA1 Message Date
Gregory Nutt
2245dddaf9 Break up some long lines 2017-06-14 13:42:56 -06:00
Gregory Nutt
0de294a586 Fix lots of occurrences of 'the the', 'the there', 'the these', 'the then', 'the they. 2017-05-11 13:35:56 -06:00
Nobutaka Toyoshima
150036eb8b sched: Fix tg_flags check with GROUP_FLAG_NOCLDWAIT 
Jira: PDFW15IS-208
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
 2017-04-14 14:50:44 +09:00
Gregory Nutt
b55a98e900 Olimex-STM32-P407: Enable task names 2017-03-04 08:49:24 -06:00
Gregory Nutt
dca77fa06a sigtimedwait: When timer expires, up_unblock_task() is called. This is okay in the single CPU case because interrupts are disable in the timer interrupt handler. But it is insufficient in the SMP case. enter_ and leave_critical_section() must be called in order to manage spinlocks correctly. 2017-02-24 10:07:23 -06:00
Gregory Nutt
d5b1ca14e2 Update README and some comments. 2017-01-02 13:54:07 -06:00
Gregory Nutt
d648f9c8b4 Add task_testcancel() 2016-12-10 16:34:14 -06:00
Gregory Nutt
f132960789 Add task_setcanceltype() 2016-12-10 16:06:14 -06:00
Gregory Nutt
5fb207eb36 Add task_setcancelstate() 2016-12-10 15:16:46 -06:00
Gregory Nutt
698597a838 task_delete() now obeys all cancellation point semantics. 2016-12-10 14:39:19 -06:00
Gregory Nutt
b52e4e5ecd Move cancellation point definitions to their own header file. 2016-12-10 09:08:26 -06:00
Gregory Nutt
bc3ca25cc7 Cancellation points: Close up some logic to eliminte some race conditions. 2016-12-10 08:36:58 -06:00
Gregory Nutt
3eba0acb1c More cancellation points. 2016-12-09 13:49:36 -06:00
Gregory Nutt
c9ca97b4b5 cancellation points are basically function. More tested is needed and additional cancellation points must be implemented before this can be merged back to master. 2016-12-09 12:01:18 -06:00
Gregory Nutt
d35e589d56 Flesh basic cancellation point support 2016-12-09 09:44:23 -06:00
Gregory Nutt
82a79b9c1b Add framework for cancellation point support. 2016-12-09 08:13:28 -06:00
Gregory Nutt
acaae12e8b Add pthread_testcancel(), pthread_testcancel(), and definitiions for cancellation types. 2016-12-09 07:23:00 -06:00
Gregory Nutt
ab43681f15 Update TODO and some comments. 2016-12-08 10:24:40 -06:00
Gregory Nutt
a1fbc2ad0d pthreads: Add pthread_cleanup_push() and pthread_cleanup_pop() 2016-12-08 09:27:13 -06:00
Gregory Nutt
7632dfd6c7 Update some comments. 2016-12-08 07:52:02 -06:00
Gregory Nutt
bac7153609 SMP: Add logic to avoid a deadlock condition when CPU1 is hung waiting for g_cpu_irqlock and CPU0 is waitin for g_cpu_paused 2016-11-22 11:34:16 -06:00
Gregory Nutt
2d1765a014 Remove more of those annoying empty comment blocks. 2016-11-21 07:34:27 -06:00
Gregory Nutt
0029c04dad task_restart: Make sure new task starts with pre-emption disabled and not in a critical section. 2016-11-21 07:33:23 -06:00
Gregory Nutt
e24f281401 This commit adds a new internal interfaces and fixes a problem with three APIs in the SMP configuration. The new internal interface is sched_cpu_pause(tcb). This function will pause a CPU if the task associated with 'tcb' is running on that CPU. This allows a different CPU to modify that OS data stuctures associated with the CPU. When the other CPU is resumed, those modifications can safely take place. 
The three fixes are to handle cases in the SMP configuration where one CPU does need to make modifications to TCB and data structures on a task that could be running running on another CPU.  Those three cases are task_delete(), task_restart(), and execution of signal handles.  In all three cases the solutions is basically the same:  (1) Call sched_cpu_pause(tcb) to pause the CPU on which the task is running, (2) perform the necessary operations, then (3) call up_cpu_resume() to restart the paused CPU.
 2016-11-20 07:57:18 -06:00
Gregory Nutt
f40fbaa4b9 sched/task: task_restart() test not supported on SMP systems. This is not fully implemented. 2016-11-19 11:41:05 -06:00
Gregory Nutt
5ca9128c38 Update comments 2016-11-19 08:33:55 -06:00
Gregory Nutt
ceacacbc63 vfork(): Fix a race condition in the SMP case. Existing logic depended on the fact that the child would not run until waitpid was called because the child had the same priority as the parent. BUT in the SMP case that is not true... the child may run immediately on a different CPU. 2016-11-19 07:30:01 -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
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
13cac3b592 sched/: Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition. 2016-06-11 16:42:42 -06:00
Gregory Nutt
a1469a3e95 Add CONFIG_DEBUG_ERROR. Change names of *dbg() * *err() 2016-06-11 15:50:49 -06:00
Gregory Nutt
86b79b33cf Reserver the name 'err' for other purposes 2016-06-11 14:40:07 -06:00
Gregory Nutt
1cdc746726 Rename CONFIG_DEBUG to CONFIG_DEBUG_FEATURES 2016-06-11 14:14:08 -06:00
Gregory Nutt
fc3540cffe Replace all occurrences of vdbg with vinfo 2016-06-11 11:59:51 -06:00
Gregory Nutt
6cfe56202d Backout 3f731241cb. It is a good idea, but has some unpleasant side effect... like SYSLOG and dbg() no longer work 2016-04-18 18:55:36 -06:00
Gregory Nutt
3f731241cb fs/inode/, fs/vfs/, and sched/task/: File and socket descriptors are no longer allocated for kernel threads. They must use SYSLOG for output and the low-level psock interfaces for network I/O. This saves a little memory which might be important for small footprint configurations. 2016-04-14 10:14:38 -06:00
Gregory Nutt
3fba968bb0 Fix an error when a task with open message queue descriptors is killed via task_delete(). Noted by Anton Gropyanov. 2016-04-11 11:14:18 -06:00
Gregory Nutt
f0671bae2f SMP: Reorder some logic related to task exit() and restart() for logic of SMP. 2016-03-22 18:19:57 -06:00
Gregory Nutt
7f19631338 sched/: Add option to buffer scheduler instrumentation data in memory. 2016-03-17 09:49:43 -06:00
Gregory Nutt
0fb035f76b Standardize some naming in code section comments 2016-02-21 18:09:04 -06:00
Gregory Nutt
143d287f11 Fix some missing header file inclusions and a misplaced semi-colon from recent commits 2016-02-21 11:27:55 -06:00
Gregory Nutt
a633353ec3 Add a CPU affinity set to the TCB if SMP is enable and use this CPU set as a mask for determining which CPUs the thread may run on. Add an affinity field to the attrributes to permit controlling which CPUs a pthread may run on. Implements pthread_att_setaffinity_np() and pthread_attr_getaffinity_np(). 2016-02-19 17:33:35 -06:00
Gregory Nutt
b50325bb38 SMP: Add funtions to perform atomic bit set/clear operations; fix two errors in SMP macros 2016-02-17 13:20:01 -06:00
Gregory Nutt
3c46fa3f9f Fix a contention problem in the previous critical section design 2016-02-15 08:50:20 -06:00