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158 Commits

Author SHA1 Message Date
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
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
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
0c8c7fecf0 Add _ to the beginning of all debug macros to avoid name collisions 2016-06-16 12:33:32 -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
1cdc746726 Rename CONFIG_DEBUG to CONFIG_DEBUG_FEATURES 2016-06-11 14:14:08 -06:00
Gregory Nutt
9b5e88af71 Update some comments 2016-03-06 13:50:26 -06:00
Gregory Nutt
5d63cd85c7 sched/semaphore: Add an internal interface to reset a semaphore count. 2016-03-05 07:33:24 -06:00
Gregory Nutt
72d3920295 Rename cpuset_t to cpu_set_t which is the type used in some non-standard Linux/GNU interfaces. Move definitions of cpu_set_t to include/sys/types.h. Add prototypes for sched_setaffinity(), sched_getaffinity(), pthread_attr_setaffinity_np(), pthread_attr_getaffinity_np(), pthread_setaffinity_np(), and pthread_getaffinity_np(). No implementation is yet in place. 2016-02-19 15:57:07 -06:00
Gregory Nutt
6543c570d4 Remove some empty file section section header comments 2016-02-17 17:38:39 -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
a442245479 SMP: Fix some non-SMP errors that crept in; fix a recursion problem; re-partition some functionality to improve design and readability 2016-02-16 10:14:33 -06:00
Gregory Nutt
9cb2a6b1f9 Rename irqsave() and irqrestore() to up_irq_save() and up_irq_restore() 2016-02-14 16:19:15 -06:00
Gregory Nutt
6e3107650d nuttx/sched: Replace irqsave() with enter_critical_section(); replace irqrestore() with leave_critical_section() 2016-02-14 08:17:46 -06:00
Gregory Nutt
97cbd7112f SMP: Implement enter/leave_critical_section 2016-02-13 10:23:16 -06:00
Gregory Nutt
3f7f58de9d SMP: Fix some debug assertion problems when DEBUG is enabled; Partial fix for one bring-up issue 2016-02-12 17:13:38 -06:00
Gregory Nutt
85f663a8ee SMP: Add non-reentrant spinlocks, fix pre-emption controls with SMP, and most of the basic scheduler support for SMP (still missing a few things) 2016-02-12 14:55:31 -06:00
Gregory Nutt
3147dfc7d5 SMP: Add some tentative initialization logic 2016-02-10 13:49:27 -06:00
Gregory Nutt
f5a3b1e89d Add EXPERIMENTAL configuration option to investigate some SMP issues 2016-02-10 10:27:48 -06:00
Gregory Nutt
bf8120d51d Fix some odd logic in CC3000 semaphore handling. Noted by Vladimir Komendantskiy 2016-02-10 09:50:28 -06:00
Gregory Nutt
2c0ad2564f Add CONFIG_SPINLOCK. Also need spinunlock() and spinlock_initialize() 2016-02-09 15:31:14 -06:00
Gregory Nutt
74db48202e sched/: Replace explict references to g_readytorun with indirect references via the this_task() macro 2016-02-06 17:44:41 -06:00
Gregory Nutt
f348e68069 Update to use 64-bit timer when available 2016-01-21 11:54:26 -06:00
Gregory Nutt
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
Gregory Nutt
79d554939e sched/: Fix some spacing issues 2015-10-07 19:59:14 -06:00
Gregory Nutt
0b12dbf95d Fix some spacing problems 2015-10-04 15:04:00 -06:00
Gregory Nutt
cb9e27c3b0 Standardize naming used for public data and function groupings 2015-10-02 16:30:35 -06:00
Paul A. Patience
9f108b7b63 Fix issues detected by clang 2015-09-10 20:59:43 -04:00
Sebastien Lorquet
89c81f6c08 FIX typo in DEBUASSERTion 2015-08-03 09:14:15 -06:00
Gregory Nutt
15db2a45a4 drivers/net/slip.c: Fix another compilation error 2015-08-02 07:20:36 -06:00
Gregory Nutt
3a109315ed Fix a logic error in last change to sem_tickwait() 2015-08-01 16:00:23 -06:00
Gregory Nutt
ffec6124f2 Add a start time to sem_tickwait() to account for any elapsed time before the timer is actually started 2015-08-01 14:57:31 -06:00
Gregory Nutt
12cbe147a0 Forget to add files before last commit 2015-08-01 07:34:27 -06:00
Gregory Nutt
2c66e0eb2a sem_tickwait(): Add a new, non-standard function to perform timed semaphore waits. It is functionally equialent to the standard sem_timedwait(), but more efficient for use in higher performance device drivers. Requested by Max Neklyudov 2015-08-01 07:31:09 -06:00
Gregory Nutt
3adcae8ffb Update the type passed to watchdog timer handlers. Using uint32_t is a problem for 64-bit machines. 2015-05-18 08:53:42 -06:00
Gregory Nutt
071658bb6d Another missing semicolon 2015-04-23 07:18:59 -06:00
Gregory Nutt
093a144934 sem_wait(): Missing comma on debug statement caused compile error with DEBUG on. Why hasn't that been noted before? 2015-04-23 07:15:55 -06:00
Gregory Nutt
b4423c1eed Make some file section headers more consistent with standard 2015-04-08 06:47:36 -06:00
Gregory Nutt
127951e029 Fix places where the errno value was being overwritten by subsequent actions so that the returned errno value was incorrect. From Max Neklyudov. 2015-02-25 07:45:04 -06:00
Gregory Nutt
cded7ea682 Fix some time value changes; mostly changing greater than 1000000000 to greater than or equal to 1000000000. From Juha Niskanen 2015-02-20 07:07:36 -06:00
Gregory Nutt
826f5516ff Semaphores: sem_waitirq.c must be built when signals are disabled. That is because not handles not only the case of semaphore wait being awakened by a signal, but also the case with sem_timedwait.c when the semaphore wait is awakened by a timeout. 2014-12-28 15:03:12 -06:00
Gregory Nutt
78b755961f Semahores: Remove a warning with SIGNALS are disabled 2014-12-28 14:54:40 -06:00
Gregory Nutt
b3a1939020 Sempahores: Add logic to clean up after task_delete() or pthread_cancel() if the task happens to be waiting on a semaphore when it is cancelled 2014-12-13 12:02:25 -06:00
Gregory Nutt
fcc2a1bb4b Fix incorrect comment 2014-11-07 15:54:24 -06:00
Gregory Nutt
322f9f401c Simplify how C source files are selected in the build 2014-10-07 07:42:36 -06:00
Gregory Nutt
38ddbc774f Cosmetic change to comments 2014-10-06 18:03:01 -06:00
Gregory Nutt
8c958be5ab Semaphore initialization is now only required if priority inheritance is initialized 2014-09-29 06:50:48 -06:00
Gregory Nutt
650a0d0615 Completes VFS-based named semaphore implemetation. Still a little buggy 2014-09-28 15:58:56 -06:00
Gregory Nutt
a41c1de32c Add basic data structures that will allow us to move named semaphore support out of the OS and into the VFS (not complete). 2014-09-28 10:15:33 -06:00
Gregory Nutt
1780810d3d Rename kmalloc to kmm_malloc for consistency 2014-08-31 17:26:36 -06:00
Gregory Nutt
0ab1b0de25 nuttx/sched: Remove explicit references to errno. That is a problem from within the kernel for certain configurations 2014-08-28 17:00:24 -06:00
Gregory Nutt
ad9b3f8ab8 wdog.h does not contain any application interface, only internal OS interface. Further, it is non-standard. Move wdog.h from include/ to include/nuttx. For the same reason, move the description of the watchdog timer interfaces from the Users Guide to the Porting Guide. 2014-08-21 11:16:55 -06:00
Gregory Nutt
e1769b22f1 Remove os_internal.h it has been replace by several new header files under sched/. There have been some sneak inclusion paths via os_internal.h, so expect a few compilation errors for some architectures 2014-08-08 18:39:28 -06:00
Gregory Nutt
d798dd37a7 Replace os_internal.h with sched/sched.h in files that actually reference something in sched.h 2014-08-08 17:53:55 -06:00
Gregory Nutt
d4b56eb3cc Move clock functions from sched/ to sched/clock 2014-08-08 14:43:02 -06:00
Gregory Nutt
0f318e9249 Move watchdog functions from sched/ to sched/wdog 2014-08-08 14:21:48 -06:00
Gregory Nutt
e10a23ae50 Move environment files from sched/ to sched/environ 2014-08-08 13:53:29 -06:00