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rng: switch request queue to QSIMPLEQ

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QSIMPLEQ supports appending to tail in O(1) and is intrusive so
it doesn't require extra memory allocations for the bookkeeping
data.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Message-Id: <1457010971-24771-1-git-send-email-lprosek@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Ladi Prosek 2016-03-03 14:16:11 +01:00 • committed by Amit Shah
parent 97556fe80e
commit 443590c204
4 changed files with 19 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

17
backends/rng.c
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@ -33,7 +33,7 @@ void rng_backend_request_entropy(RngBackend *s, size_t size,
k->request_entropy(s, req);
s->requests = g_slist_append(s->requests, req);
QSIMPLEQ_INSERT_TAIL(&s->requests, req, next);
}
}
@ -83,24 +83,27 @@ static void rng_backend_free_request(RngRequest *req)
static void rng_backend_free_requests(RngBackend *s)
{
GSList *i;
RngRequest *req, *next;
for (i = s->requests; i; i = i->next) {
rng_backend_free_request(i->data);
QSIMPLEQ_FOREACH_SAFE(req, &s->requests, next, next) {
rng_backend_free_request(req);
}
g_slist_free(s->requests);
s->requests = NULL;
QSIMPLEQ_INIT(&s->requests);
}
void rng_backend_finalize_request(RngBackend *s, RngRequest *req)
{
s->requests = g_slist_remove(s->requests, req);
QSIMPLEQ_REMOVE(&s->requests, req, RngRequest, next);
rng_backend_free_request(req);
}
static void rng_backend_init(Object *obj)
{
RngBackend *s = RNG_BACKEND(obj);
QSIMPLEQ_INIT(&s->requests);
object_property_add_bool(obj, "opened",
rng_backend_prop_get_opened,
rng_backend_prop_set_opened,