[Qemu-devel] [PATCH v2 1/4] qxl/spice-display: move pipe to ssd

[Alon Levy]

this moves the int pipe[2] and pthread_t main data from the
PCIQXLDevice struct to the SimpleSpiceDisplay. This will let us
reuse it in the next patch for both -spice with no -qxl usage and
for vga mode from qxl.
---
 hw/qxl.c           |   32 ++++++++++++++++++++------------
 hw/qxl.h           |    4 ----
 ui/spice-display.c |    1 +
 ui/spice-display.h |    7 +++++++
 4 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/hw/qxl.c b/hw/qxl.c
index fe4212b..f1ee0ae 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1062,7 +1062,7 @@ static void pipe_read(void *opaque)
     int len;
 
     do {
-        len = read(d->pipe[0], &dummy, sizeof(dummy));
+        len = read(d->ssd.pipe[0], &dummy, sizeof(dummy));
     } while (len == sizeof(dummy));
     qxl_set_irq(d);
 }
@@ -1078,31 +1078,39 @@ static void qxl_send_events(PCIQXLDevice *d, uint32_t 
events)
     if ((old_pending & le_events) == le_events) {
         return;
     }
-    if (pthread_self() == d->main) {
+    if (pthread_self() == d->ssd.main) {
+        /* running in io_thread thread */
         qxl_set_irq(d);
     } else {
-        if (write(d->pipe[1], d, 1) != 1) {
+        if (write(d->ssd.pipe[1], d, 1) != 1) {
             dprint(d, 1, "%s: write to pipe failed\n", __FUNCTION__);
         }
     }
 }
 
-static void init_pipe_signaling(PCIQXLDevice *d)
+void qxl_create_server_to_iothread_pipe(SimpleSpiceDisplay *ssd)
 {
-   if (pipe(d->pipe) < 0) {
-       dprint(d, 1, "%s: pipe creation failed\n", __FUNCTION__);
+   if (pipe(ssd->pipe) < 0) {
+       fprintf(stderr, "%s: pipe creation failed\n", __FUNCTION__);
        return;
    }
+
 #ifdef CONFIG_IOTHREAD
-   fcntl(d->pipe[0], F_SETFL, O_NONBLOCK);
+   fcntl(ssd->pipe[0], F_SETFL, O_NONBLOCK);
 #else
-   fcntl(d->pipe[0], F_SETFL, O_NONBLOCK /* | O_ASYNC */);
+   fcntl(ssd->pipe[0], F_SETFL, O_NONBLOCK /* | O_ASYNC */);
 #endif
-   fcntl(d->pipe[1], F_SETFL, O_NONBLOCK);
-   fcntl(d->pipe[0], F_SETOWN, getpid());
+   fcntl(ssd->pipe[1], F_SETFL, O_NONBLOCK);
 
-   d->main = pthread_self();
-   qemu_set_fd_handler(d->pipe[0], pipe_read, NULL, d);
+   fcntl(ssd->pipe[0], F_SETOWN, getpid());
+
+   qemu_set_fd_handler(ssd->pipe[0], pipe_read, NULL, ssd);
+   ssd->main = pthread_self();
+}
+
+static void init_pipe_signaling(PCIQXLDevice *d)
+{
+   qxl_create_server_to_iothread_pipe(&d->ssd);
 }
 
 /* graphics console */
diff --git a/hw/qxl.h b/hw/qxl.h
index f6c450d..701245f 100644
--- a/hw/qxl.h
+++ b/hw/qxl.h
@@ -55,10 +55,6 @@ typedef struct PCIQXLDevice {
     } guest_surfaces;
     QXLPHYSICAL        guest_cursor;
 
-    /* thread signaling */
-    pthread_t          main;
-    int                pipe[2];
-
     /* ram pci bar */
     QXLRam             *ram;
     VGACommonState     vga;
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 020b423..d60e7a9 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -406,6 +406,7 @@ void qemu_spice_display_init(DisplayState *ds)
     qemu_spice_add_interface(&sdpy.qxl.base);
     assert(sdpy.worker);
 
+    qxl_create_server_to_iothread_pipe(&sdpy);
     qemu_add_vm_change_state_handler(qemu_spice_vm_change_state_handler, 
&sdpy);
     qemu_spice_create_host_memslot(&sdpy);
     qemu_spice_create_host_primary(&sdpy);
diff --git a/ui/spice-display.h b/ui/spice-display.h
index aef0464..de584d9 100644
--- a/ui/spice-display.h
+++ b/ui/spice-display.h
@@ -43,6 +43,11 @@ typedef struct SimpleSpiceDisplay {
     QXLRect dirty;
     int notify;
     int running;
+
+    /* thread signaling - used both in qxl (in vga mode
+     * and in native mode) and without qxl */
+    pthread_t          main;
+    int                pipe[2];     /* to iothread */
 } SimpleSpiceDisplay;
 
 typedef struct SimpleSpiceUpdate {
@@ -66,3 +71,5 @@ void qemu_spice_display_update(SimpleSpiceDisplay *ssd,
                                int x, int y, int w, int h);
 void qemu_spice_display_resize(SimpleSpiceDisplay *ssd);
 void qemu_spice_display_refresh(SimpleSpiceDisplay *ssd);
+/* used by both qxl and spice-display */
+void qxl_create_server_to_iothread_pipe(SimpleSpiceDisplay *ssd);
-- 
1.7.4.1