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
..
clock	sched/clock: Correct calculation for the case of Tickless mode with a 32-bit timer. In that case, the calculation was returning millisecond accuracy. That is not good when the timer accuracy is < 1 msec.	2016-11-19 09:55:21 -06:00
environ	sched/: Review and correct some stylistic inconsistencies	2016-08-07 08:25:30 -06:00
errno	Remove some empty file section section header comments	2016-02-17 18:05:03 -06:00
group	sched: Disable priority inheritance on all semaphores used for signaling	2016-11-03 12:42:02 -06:00
init	Trivia fix to typo in comment	2016-10-26 12:29:36 -06:00
irq	Most interrupt handling logic interacts with tasks via standard mechanism such as sem_post, sigqueue, mq_send, etc. This all call enter_critical_section and are assumed to be safe in the SMP case.	2016-11-18 13:57:30 -06:00
module	Without lowsyslog() *llinfo() is not useful. Eliminate and replace with *info().	2016-06-20 11:59:15 -06:00
mqueue	Correct a comment	2016-09-15 13:10:42 -06:00
paging	Without lowsyslog() *llinfo() is not useful. Eliminate and replace with *info().	2016-06-20 11:59:15 -06:00
pthread	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
sched	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.	2016-11-20 07:57:18 -06:00
semaphore	sem_wait() and sem_trywait() no longer modify the errno value UNLESS an error occurs. This allows these functions to be used internallly without clobbering the errno value.	2016-11-09 07:01:49 -06:00
signal	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.	2016-11-20 07:57:18 -06:00
task	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.	2016-11-20 07:57:18 -06:00
timer	sched/: Review and correct some stylistic inconsistencies	2016-08-07 08:32:11 -06:00
wdog	Most interrupt handling logic interacts with tasks via standard mechanism such as sem_post, sigqueue, mq_send, etc. This all call enter_critical_section and are assumed to be safe in the SMP case.	2016-11-18 13:57:30 -06:00
wqueue	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
.gitignore
Kconfig	Update some Kconfig comments	2016-11-06 09:06:37 -06:00
Makefile	TLS: Simplify	2016-03-11 07:17:32 -06:00