From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:33312) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gbnLL-0001ql-GU for qemu-devel@nongnu.org; Tue, 25 Dec 2018 09:06:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gbnLK-00040t-L2 for qemu-devel@nongnu.org; Tue, 25 Dec 2018 09:05:59 -0500 Received: from smtp.nue.novell.com ([195.135.221.5]:46221) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gbnLK-0003we-Bj for qemu-devel@nongnu.org; Tue, 25 Dec 2018 09:05:58 -0500 From: Fei Li Date: Tue, 25 Dec 2018 22:04:47 +0800 Message-Id: <20181225140449.15786-15-fli@suse.com> In-Reply-To: <20181225140449.15786-1-fli@suse.com> References: <20181225140449.15786-1-fli@suse.com> Subject: [Qemu-devel] [PATCH for-4.0 v9 14/16] qemu_thread: supplement error handling for vnc_start_worker_thread List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, shirley17fei@gmail.com Cc: lifei1214@126.com, Markus Armbruster , Gerd Hoffmann Supplement the error handling for vnc_thread_worker_thread: add an Error parameter for it to propagate the error to its caller to handle in case it fails, and make it return a Boolean to indicate whether it succeeds. Cc: Markus Armbruster Cc: Gerd Hoffmann Signed-off-by: Fei Li --- ui/vnc-jobs.c | 17 +++++++++++------ ui/vnc-jobs.h | 2 +- ui/vnc.c | 4 +++- 3 files changed, 15 insertions(+), 8 deletions(-) diff --git a/ui/vnc-jobs.c b/ui/vnc-jobs.c index 5712f1f501..35a652d1fd 100644 --- a/ui/vnc-jobs.c +++ b/ui/vnc-jobs.c @@ -332,16 +332,21 @@ static bool vnc_worker_thread_running(void) return queue; /* Check global queue */ } -void vnc_start_worker_thread(void) +bool vnc_start_worker_thread(Error **errp) { VncJobQueue *q; - if (vnc_worker_thread_running()) - return ; + if (vnc_worker_thread_running()) { + goto out; + } q = vnc_queue_init(); - /* TODO: let the further caller handle the error instead of abort() here */ - qemu_thread_create(&q->thread, "vnc_worker", vnc_worker_thread, - q, QEMU_THREAD_DETACHED, &error_abort); + if (!qemu_thread_create(&q->thread, "vnc_worker", vnc_worker_thread, + q, QEMU_THREAD_DETACHED, errp)) { + vnc_queue_clear(q); + return false; + } queue = q; /* Set global queue */ +out: + return true; } diff --git a/ui/vnc-jobs.h b/ui/vnc-jobs.h index 59f66bcc35..14640593db 100644 --- a/ui/vnc-jobs.h +++ b/ui/vnc-jobs.h @@ -37,7 +37,7 @@ void vnc_job_push(VncJob *job); void vnc_jobs_join(VncState *vs); void vnc_jobs_consume_buffer(VncState *vs); -void vnc_start_worker_thread(void); +bool vnc_start_worker_thread(Error **errp); /* Locks */ static inline int vnc_trylock_display(VncDisplay *vd) diff --git a/ui/vnc.c b/ui/vnc.c index 0c1b477425..0ffe9e6a5d 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -3236,7 +3236,9 @@ void vnc_display_init(const char *id, Error **errp) vd->connections_limit = 32; qemu_mutex_init(&vd->mutex); - vnc_start_worker_thread(); + if (!vnc_start_worker_thread(errp)) { + return; + } vd->dcl.ops = &dcl_ops; register_displaychangelistener(&vd->dcl); -- 2.13.7