1 files changed, 82 insertions, 0 deletions

diff --git a/litmus/jobs.c b/litmus/jobs.c
new file mode 100644
index 000000000000..0dd36b9343d6
--- /dev/null
+++ b/litmus/jobs.c
@@ -0,0 +1,82 @@
+/* litmus/jobs.c - common job control code
+ */
+
+#include <linux/sched.h>
+
+#include <litmus/preempt.h>
+#include <litmus/litmus.h>
+#include <litmus/sched_plugin.h>
+#include <litmus/jobs.h>
+
+static inline void setup_release(struct task_struct *t, lt_t release)
+{
+        /* prepare next release */
+        t->rt_param.job_params.release = release;
+        t->rt_param.job_params.deadline = release + get_rt_relative_deadline(t);
+        t->rt_param.job_params.exec_time = 0;
+
+        /* update job sequence number */
+        t->rt_param.job_params.job_no++;
+}
+
+void prepare_for_next_period(struct task_struct *t)
+{
+        BUG_ON(!t);
+
+        /* Record lateness before we set up the next job's
+         * release and deadline. Lateness may be negative.
+         */
+        t->rt_param.job_params.lateness =
+                (long long)litmus_clock() -
+                (long long)t->rt_param.job_params.deadline;
+
+        if (tsk_rt(t)->sporadic_release) {
+                TRACE_TASK(t, "sporadic release at %llu\n",
+                           tsk_rt(t)->sporadic_release_time);
+                /* sporadic release */
+                setup_release(t, tsk_rt(t)->sporadic_release_time);
+                tsk_rt(t)->sporadic_release = 0;
+        } else {
+                /* periodic release => add period */
+                setup_release(t, get_release(t) + get_rt_period(t));
+        }
+}
+
+void release_at(struct task_struct *t, lt_t start)
+{
+        BUG_ON(!t);
+        setup_release(t, start);
+        tsk_rt(t)->completed = 0;
+}
+
+long default_wait_for_release_at(lt_t release_time)
+{
+        struct task_struct *t = current;
+        unsigned long flags;
+
+        local_irq_save(flags);
+        tsk_rt(t)->sporadic_release_time = release_time;
+        smp_wmb();
+        tsk_rt(t)->sporadic_release = 1;
+        local_irq_restore(flags);
+
+        return litmus->complete_job();
+}
+
+
+/*
+ *      Deactivate current task until the beginning of the next period.
+ */
+long complete_job(void)
+{
+        preempt_disable();
+        TRACE_CUR("job completion indicated at %llu\n", litmus_clock());
+        /* Mark that we do not excute anymore */
+        tsk_rt(current)->completed = 1;
+        /* call schedule, this will return when a new job arrives
+         * it also takes care of preparing for the next release
+         */
+        litmus_reschedule_local();
+        preempt_enable();
+        return 0;
+}