2017-04-21 07:24:54 +02:00
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extern crate cortex_m_rtfm as rtfm;
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2017-04-10 05:42:17 +02:00
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2017-04-21 07:24:54 +02:00
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use rtfm::{C16, C2, P1, P16, P2, P3, Resource};
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2017-04-10 05:42:17 +02:00
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static R1: Resource<i32, C2> = Resource::new(0);
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// You CAN'T lock a resource with ceiling C from a task with priority P if P > C
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fn j1(prio: P3) {
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2017-04-21 22:31:02 +02:00
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let ceil = prio.as_ceiling();
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2017-04-21 22:41:03 +02:00
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ceil.raise(&R1, |ceil| {
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2017-04-21 22:31:02 +02:00
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//~^ error
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});
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2017-04-10 05:42:17 +02:00
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}
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// DON'T lock a resource with ceiling equal to the task priority.
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2017-04-20 00:21:13 +02:00
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// Instead use `borrow`
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2017-04-10 05:42:17 +02:00
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fn j2(prio: P2) {
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2017-04-21 22:31:02 +02:00
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let ceil = prio.as_ceiling();
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2017-04-21 22:41:03 +02:00
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ceil.raise(&R1, |_| {});
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2017-04-10 05:42:17 +02:00
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//~^ error
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// OK
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2017-04-21 22:31:02 +02:00
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let r1 = R1.borrow(&prio, ceil);
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2017-04-10 05:42:17 +02:00
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}
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// You CAN lock a resource with ceiling C from a task with priority P if C > P
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fn j3(prio: P1) {
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2017-04-21 22:31:02 +02:00
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let ceil = prio.as_ceiling();
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2017-04-10 05:42:17 +02:00
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// OK
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2017-04-21 22:41:03 +02:00
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ceil.raise(&R1, |ceil| {
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2017-04-21 22:31:02 +02:00
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let r1 = R1.borrow(&prio, ceil);
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})
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2017-04-10 05:42:17 +02:00
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}
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static R2: Resource<i32, C16> = Resource::new(0);
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// Tasks with priority less than P16 can't lock a resource with ceiling C16
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fn j4(prio: P1) {
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2017-04-21 22:31:02 +02:00
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let ceil = prio.as_ceiling();
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2017-04-21 22:41:03 +02:00
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ceil.raise(&R2, |ceil| {
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2017-04-21 22:31:02 +02:00
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//~^ error
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});
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2017-04-10 05:42:17 +02:00
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}
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// Only tasks with priority P16 can claim a resource with ceiling C16
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fn j5(prio: P16) {
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// OK
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2017-04-20 00:21:13 +02:00
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let r2 = R2.borrow(&prio, prio.as_ceiling());
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2017-04-10 05:42:17 +02:00
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}
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