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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2021-03-10 09:47:58 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2021-03-22 10:46:47 +0100 |
| commit | 64242776de86d46d914aa8f3ab6cfee68420ca6a (patch) | |
| tree | 33b339b551b65557d3f15c2af6e4beaae17da631 /include/sched.h | |
| parent | 7ce21703892fac7084d417d296fc2723a85e7c10 (diff) | |
| download | barebox-64242776de86d46d914aa8f3ab6cfee68420ca6a.tar.gz barebox-64242776de86d46d914aa8f3ab6cfee68420ca6a.tar.xz | |
common: introduce bthreads, co-operative barebox threads
With the new setjmp/longjmp/initjmp support, we have all the
architecture support in place to have suspendable green
threads in barebox. These are expected to replace pollers and
workqueues. For now we still have a differentiation between
the main and secondary threads. The main thread is allowed
I/O access unconditionally. If it's in a delay loop, a secondary
thread running needs to be wary of not entering the same driver
and doing hardware manipulation. We already have slices as
mechanism to guard against this, but they aren't used as widely
as needed.
Preferably, in the end, threads will automatically yield until
they can claim a resource (i.e. lock a mutex). Until we are there,
take the same care when using bthreads as with pollers.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/sched.h')
| -rw-r--r-- | include/sched.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/sched.h b/include/sched.h index 43d239c3ef..57be1678fd 100644 --- a/include/sched.h +++ b/include/sched.h @@ -2,11 +2,14 @@ #ifndef __BAREBOX_SCHED_H_ #define __BAREBOX_SCHED_H_ +#include <bthread.h> #include <poller.h> static inline void resched(void) { poller_call(); + if (!IS_ENABLED(CONFIG_POLLER) || !poller_active) + bthread_reschedule(); } #endif |