job: Move pause/resume functions to Job

While we already moved the state related to job pausing to Job, the
functions to do were still BlockJob only. This commit moves them over to
Job.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/job.c b/job.c
index 1b8cba15ff..fd10b1d267 100644
--- a/job.c
+++ b/job.c
@@ -341,6 +341,65 @@ void job_start(Job *job)
     aio_co_enter(job->aio_context, job->co);
 }
 
+/* Assumes the block_job_mutex is held */
+static bool job_timer_not_pending(Job *job)
+{
+    return !timer_pending(&job->sleep_timer);
+}
+
+void job_pause(Job *job)
+{
+    job->pause_count++;
+}
+
+void job_resume(Job *job)
+{
+    assert(job->pause_count > 0);
+    job->pause_count--;
+    if (job->pause_count) {
+        return;
+    }
+
+    /* kick only if no timer is pending */
+    job_enter_cond(job, job_timer_not_pending);
+}
+
+void job_user_pause(Job *job, Error **errp)
+{
+    if (job_apply_verb(job, JOB_VERB_PAUSE, errp)) {
+        return;
+    }
+    if (job->user_paused) {
+        error_setg(errp, "Job is already paused");
+        return;
+    }
+    job->user_paused = true;
+    job_pause(job);
+}
+
+bool job_user_paused(Job *job)
+{
+    return job->user_paused;
+}
+
+void job_user_resume(Job *job, Error **errp)
+{
+    assert(job);
+    if (!job->user_paused || job->pause_count <= 0) {
+        error_setg(errp, "Can't resume a job that was not paused");
+        return;
+    }
+    if (job_apply_verb(job, JOB_VERB_RESUME, errp)) {
+        return;
+    }
+    if (job->driver->user_resume) {
+        job->driver->user_resume(job);
+    }
+    job->user_paused = false;
+    job_resume(job);
+}
+
+
 typedef struct {
     Job *job;
     JobDeferToMainLoopFn *fn;