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74 Commits

Author SHA1 Message Date
Jon Morton
9851a906a5 initialize cur_thread, first task on thread 0 2012-03-31 13:14:54 -05:00
Jon Morton
8aee42a382 Choose task thread in rust_scheduler by round robin 
Remove the random context from rust_scheduler and use a simple round robin system to choose which thread a new task gets put on. Also, some incorrect tab indents around scoped blocks were fixed.
 2012-03-31 02:14:44 -05:00
Brian Anderson
f5f6135fd0 rt: Stop using large stacks for the main task 2012-03-21 19:10:32 -07:00
Brian Anderson
b247de6458 rt: Remove lock_held_by_current_thread 2012-03-18 17:03:35 -07:00
Brian Anderson
1366d65660 rt: Remove remaining uses of rust_kernel::get_task_by_id 2012-03-15 11:10:52 -07:00
Brian Anderson
b3f77bf927 rt: Change the way the kernel exits to avoid pthread leaks 
This makes the kernel join every scheduler thread before exiting in order to
ensure that all threads are completely terminated before the process exits. On
my machine, for 32-bit targets, this was causing regular valgrind errors.
 2012-02-27 14:25:32 -08:00
Brian Anderson
028af5cb6c rt: Change the lifecycle of tasks and schedulers for various reasons 
This is in preparation for giving schedulers their own life cycle separate
from the kernel.

Tasks must be deleted before their scheduler thread, so we can't let the
scheduler exit before all its tasks have been cleaned up. In this scheme,
the scheduler will unregister tasks with the kernel when they are reaped,
then drop their ref on the task (there may still be others). When the task
ref count hits zero, the task will request to be unregistered from the
scheduler, which is responsible for deleting the task.

Instead of having the kernel tell the scheduler to exit, let the scheduler
decide when to exit. For now it will exit when all of its tasks are
unregistered.
 2012-02-08 15:42:51 -08:00
Brian Anderson
7685e5de94 rt: Refactor the rust_kernel interface a bit 2012-02-08 15:42:47 -08:00
Brian Anderson
ad80823a6c rt: Introduce scheduler ids 2012-02-08 15:33:40 -08:00
Brian Anderson
c76b81cddf rt: Delete schedulers immediately upon release 
This will be needed once we support dynamically changing schedulers.
 2012-02-08 15:33:40 -08:00
Brian Anderson
f39e64d56a rt: Change the scheme used for terminating the kernel 
Instead of joining on the scheduler threads, instead keep a count of active
schedulers. When there are no more schedulers raise a signal for the main
thread to continue.

This will be required once schedulers can be added and removed from the
running kernel.
 2012-02-08 15:33:40 -08:00
Brian Anderson
21d783c338 rt: Make isaac_init not a template 2012-02-03 23:48:12 -08:00
Brian Anderson
f7a727e861 rt: Remove some silly locks in rust_scheduler 2012-02-03 23:48:12 -08:00
Brian Anderson
12fa90888e rt: Clean up the way the kernel tracks tasks 2012-02-03 23:48:12 -08:00
Brian Anderson
8d881967a2 rt: Extract rust_scheduler from rust_task_thread 2012-02-03 23:48:12 -08:00
Brian Anderson
f94339cc1c rt: Rename rust_scheduler to rust_task_thread 2012-02-03 23:48:12 -08:00
Brian Anderson
3b4dd26ff1 rt: Remove lock_and_signal::signal_all 2012-02-02 18:29:03 -08:00
Brian Anderson
cd774fc5fa rt: Stop waking up the scheduler on a timer 2012-02-02 18:23:01 -08:00
Brian Anderson
b1a090c7c4 rt: Remove unused arguments in rust_scheduler 2012-02-02 18:17:33 -08:00
Brian Anderson
6c632c71c6 rt: Simplify reap_dead_tasks 2012-02-02 18:10:24 -08:00
Brian Anderson
f719ea552b rt: Remove rust_scheduler::interrupt_flag. Unused 2012-02-02 18:10:24 -08:00
Brian Anderson
aee83d2ff1 rt: Only wake up all schedulers when no tasks are left 
At the moment there's not really any reason to be raising this signal,
since they schedulers wake up periodically anyway, but once we remove
the timer this will be how the schedulers know to exit.
 2012-02-02 18:10:24 -08:00
Brian Anderson
5449b886d3 rt: Remove bogus task reaping from the scheduler 2012-02-02 18:10:24 -08:00
Brian Anderson
3978fbff8b rt: Remove rust_task::can_schedule. Does nothing 2012-02-02 18:10:24 -08:00
Brian Anderson
ed3a5ad5ad rt: Remove running_on flag. Does nothing 2012-02-02 18:10:24 -08:00
Brian Anderson
57cad61353 rt: Remove task pinning. Does nothing 2012-02-02 18:10:24 -08:00
Brian Anderson
8693fcc2d7 rt: Remove yield timers 2012-02-02 18:10:24 -08:00
Brian Anderson
5c89938544 rt: Remove rust_timer. Unused 2012-02-01 16:05:17 -08:00
Brian Anderson
6548cdd59b rt: Make the initial segment of the main task's stack 1MB 
This is a trick to fool microbenchmarks. Closes #1681
 2012-01-29 21:20:39 -08:00
Brian Anderson
0616cba62b libcore: Add sys::set_exit_status 
Sets the process exit code
 2012-01-12 22:24:27 -08:00
Niko Matsakis
8506241f3a fix how we walk functions to match new closure fmt 2012-01-06 22:40:31 -08:00
Graydon Hoare
5930463faa Tidy up some drift in runtime logging, close #1380. 2011-12-28 11:53:12 -08:00
Brian Anderson
9e6ff44d93 rt: Make __morestack work on win32 2011-12-08 16:47:33 -08:00
Brian Anderson
5d1a1dc420 rt: Rename stk_seg.limit to stk_seg.end 
rust_task is using the word limit it two ways, so one has to change.
 2011-12-06 21:45:53 -08:00
Brian Anderson
6da1a3fcd6 rt: Refactor record_sp into task::record_stack_limit 2011-12-01 15:26:42 -08:00
Brian Anderson
6bdf347418 rt: Make __morestack (without unwinding) work on 32-bit linux 2011-11-22 18:02:10 -08:00
Brian Anderson
0dfa1410d3 rt: Remove task::on_wakeup. Unused 2011-11-18 10:32:27 -08:00
Brian Anderson
d624e523c9 rt: Make stack growth code build on Linux 2011-11-17 10:53:06 -08:00
Patrick Walton
e6c3c4e48c rt: More work on morestack 2011-11-17 10:52:59 -08:00
Brian Anderson
02cebbb9f1 Revert "rt: More work on morestack" 
This reverts commit 68aff2ad6d.
 2011-11-16 18:49:19 -08:00
Brian Anderson
5559e149e4 Revert "rt: Make stack growth code build on Linux" 
This reverts commit da4b7da4e1.
 2011-11-16 18:49:07 -08:00
Brian Anderson
da4b7da4e1 rt: Make stack growth code build on Linux 2011-11-16 18:33:00 -08:00
Patrick Walton
68aff2ad6d rt: More work on morestack 2011-11-16 18:00:57 -08:00
Brian Anderson
bae817efe6 rt: Remove rust_task::notify_tasks_wating_to_join 2011-11-16 17:22:14 -08:00
Patrick Walton
b3cf0c4d1b Revert "rt: More work on morestack" 
This reverts commit ced0d4f15e.
 2011-11-14 16:20:53 -08:00
Patrick Walton
ced0d4f15e rt: More work on morestack 2011-11-14 16:17:08 -08:00
Patrick Walton
e8757ea01f rt: Expose the C stack inside the Rust scheduler so that C calls can switch to it 2011-09-28 10:22:02 -07:00
Patrick Walton
9ba86178ef rt: Store the task in TLS 2011-09-27 18:12:03 -07:00
Patrick Walton
5209b19255 rt: Rename rand() to isaac_rand() since the former prevents lots of standard headers from being included 2011-09-20 15:34:47 -07:00
Brian Anderson
a0ad9a42cd Unsupervise tasks before the scheduler kills them. Unblock before yield->fail 2011-09-14 17:05:35 -07:00