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authorPaolo Bonzini <pbonzini@redhat.com>2012-09-24 14:57:41 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2012-10-30 09:30:53 +0100
commite3713e001fb7d4d82f6de82800c1463e758e4289 (patch)
tree6fda705e8c592e257d260fd37c6cbbac77d21f5a /async.c
parentf42b22077bc63a482d7a8755b54e33475ab78541 (diff)
downloadqemu-arm-e3713e001fb7d4d82f6de82800c1463e758e4289.tar.gz
aio: make AioContexts GSources
This lets AioContexts be used (optionally) with a glib main loop. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'async.c')
-rw-r--r--async.c65
1 files changed, 64 insertions, 1 deletions
diff --git a/async.c b/async.c
index 513bdd7aa2..4ffdd986f1 100644
--- a/async.c
+++ b/async.c
@@ -136,10 +136,73 @@ void aio_bh_update_timeout(AioContext *ctx, uint32_t *timeout)
}
}
+static gboolean
+aio_ctx_prepare(GSource *source, gint *timeout)
+{
+ AioContext *ctx = (AioContext *) source;
+ uint32_t wait = -1;
+ aio_bh_update_timeout(ctx, &wait);
+
+ if (wait != -1) {
+ *timeout = MIN(*timeout, wait);
+ return wait == 0;
+ }
+
+ return false;
+}
+
+static gboolean
+aio_ctx_check(GSource *source)
+{
+ AioContext *ctx = (AioContext *) source;
+ QEMUBH *bh;
+
+ for (bh = ctx->first_bh; bh; bh = bh->next) {
+ if (!bh->deleted && bh->scheduled) {
+ return true;
+ }
+ }
+ return aio_pending(ctx);
+}
+
+static gboolean
+aio_ctx_dispatch(GSource *source,
+ GSourceFunc callback,
+ gpointer user_data)
+{
+ AioContext *ctx = (AioContext *) source;
+
+ assert(callback == NULL);
+ aio_poll(ctx, false);
+ return true;
+}
+
+static GSourceFuncs aio_source_funcs = {
+ aio_ctx_prepare,
+ aio_ctx_check,
+ aio_ctx_dispatch,
+ NULL
+};
+
+GSource *aio_get_g_source(AioContext *ctx)
+{
+ g_source_ref(&ctx->source);
+ return &ctx->source;
+}
AioContext *aio_context_new(void)
{
- return g_new0(AioContext, 1);
+ return (AioContext *) g_source_new(&aio_source_funcs, sizeof(AioContext));
+}
+
+void aio_context_ref(AioContext *ctx)
+{
+ g_source_ref(&ctx->source);
+}
+
+void aio_context_unref(AioContext *ctx)
+{
+ g_source_unref(&ctx->source);
}
void aio_flush(AioContext *ctx)