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* In queue_wait_w_tmo, guarantee wait durationMichael Sevakis2017-02-02
| | | | | | | | | | | | | It is possible to have a thread awoken and subsequently the message that was placed in the queue has been removed by the time the thread is able to check the queue. Ensure theads that failed to find a message do not return prematurely. It was at worst imprecise when a timeout is specified. It's entirely incorrect if the function ever returns with SYS_TIMEOUT when using TIMEOUT_BLOCK. Change-Id: Ibd41eae8c787adf7a320a24603cf64ff8a6da66a
* Remove I/O priority. It is harmful when used with the new file code.Michael Sevakis2014-08-30
| | | | | | | | | | HAVE_IO_PRIORITY was defined for native targets with dircache. It is already effectively disabled for the most part since dircache no longer lowers its thread's I/O priority. It existed primarily for the aforementioned configuration. Change-Id: Ia04935305397ba14df34647c8ea29c2acaea92aa
* Base scheduler queues off linked lists and do cleanup/consolidationMichael Sevakis2014-08-16
| | | | | | | | | | | | | | | | | | | | | | | | | Abstracts threading from itself a bit, changes the way its queues are handled and does type hiding for that as well. Do alot here due to already required major brain surgery. Threads may now be on a run queue and a wait queue simultaneously so that the expired timer only has to wake the thread but not remove it from the wait queue which simplifies the implicit wake handling. List formats change for wait queues-- doubly-linked, not circular. Timeout queue is now singly-linked. The run queue is still circular as before. Adds a better thread slot allocator that may keep the slot marked as used regardless of the thread state. Assists in dumping special tasks that switch_thread was tasked to perform (blocking tasks). Deletes alot of code yet surprisingly, gets larger than expected. Well, I'm not not minding that for the time being-- omlettes and break a few eggs and all that. Change-Id: I0834d7bb16b2aecb2f63b58886eeda6ae4f29d59
* Do some kernel cleanupMichael Sevakis2014-08-08
| | | | | | | | | | | | | | | | | | | | * Seal away private thread and kernel definitions and declarations into the internal headers in order to better hide internal structure. * Add a thread-common.c file that keeps shared functions together. List functions aren't messed with since that's about to be changed to different ones. * It is necessary to modify some ARM/PP stuff since GCC was complaining about constant pool distance and I would rather not force dump it. Just bl the cache calls in the startup and exit code and let it use veneers if it must. * Clean up redundant #includes in relevant areas and reorganize them. * Expunge useless and dangerous stuff like remove_thread(). Change-Id: I6e22932fad61a9fac30fd1363c071074ee7ab382
* kernel: Break out kernel primitives into separate files and move to separate ↵Thomas Martitz2014-03-03
dir. No code changed, just shuffling stuff around. This should make it easier to build only select parts kernel and use different implementations. Change-Id: Ie1f00f93008833ce38419d760afd70062c5e22b5