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authorPaolo Bonzini <pbonzini@redhat.com>2012-09-24 18:44:14 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2012-10-30 09:30:53 +0100
commit2f4dc3c1b2a453a8255d9b97c7cb87860123e495 (patch)
treee58b08aaec795c27b212567f293c05ef5f14ff2d /async.c
parente3713e001fb7d4d82f6de82800c1463e758e4289 (diff)
downloadqemu-arm-2f4dc3c1b2a453a8255d9b97c7cb87860123e495.tar.gz
aio: add aio_notify
With this change async.c does not rely anymore on any service from main-loop.c, i.e. it is completely self-contained. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'async.c')
-rw-r--r--async.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/async.c b/async.c
index 4ffdd986f1..564526f57f 100644
--- a/async.c
+++ b/async.c
@@ -30,6 +30,7 @@
/* bottom halves (can be seen as timers which expire ASAP) */
struct QEMUBH {
+ AioContext *ctx;
QEMUBHFunc *cb;
void *opaque;
QEMUBH *next;
@@ -42,6 +43,7 @@ QEMUBH *aio_bh_new(AioContext *ctx, QEMUBHFunc *cb, void *opaque)
{
QEMUBH *bh;
bh = g_malloc0(sizeof(QEMUBH));
+ bh->ctx = ctx;
bh->cb = cb;
bh->opaque = opaque;
bh->next = ctx->first_bh;
@@ -101,8 +103,7 @@ void qemu_bh_schedule(QEMUBH *bh)
return;
bh->scheduled = 1;
bh->idle = 0;
- /* stop the currently executing CPU to execute the BH ASAP */
- qemu_notify_event();
+ aio_notify(bh->ctx);
}
void qemu_bh_cancel(QEMUBH *bh)
@@ -177,11 +178,20 @@ aio_ctx_dispatch(GSource *source,
return true;
}
+static void
+aio_ctx_finalize(GSource *source)
+{
+ AioContext *ctx = (AioContext *) source;
+
+ aio_set_event_notifier(ctx, &ctx->notifier, NULL, NULL);
+ event_notifier_cleanup(&ctx->notifier);
+}
+
static GSourceFuncs aio_source_funcs = {
aio_ctx_prepare,
aio_ctx_check,
aio_ctx_dispatch,
- NULL
+ aio_ctx_finalize
};
GSource *aio_get_g_source(AioContext *ctx)
@@ -190,9 +200,21 @@ GSource *aio_get_g_source(AioContext *ctx)
return &ctx->source;
}
+void aio_notify(AioContext *ctx)
+{
+ event_notifier_set(&ctx->notifier);
+}
+
AioContext *aio_context_new(void)
{
- return (AioContext *) g_source_new(&aio_source_funcs, sizeof(AioContext));
+ AioContext *ctx;
+ ctx = (AioContext *) g_source_new(&aio_source_funcs, sizeof(AioContext));
+ event_notifier_init(&ctx->notifier, false);
+ aio_set_event_notifier(ctx, &ctx->notifier,
+ (EventNotifierHandler *)
+ event_notifier_test_and_clear, NULL);
+
+ return ctx;
}
void aio_context_ref(AioContext *ctx)