hw/display/apple-gfx: Replace QemuSemaphore with QemuEvent

sem in AppleGFXReadMemoryJob is an one-shot event so it can be converted
into QemuEvent, which is more specialized for such a use case.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/20250529-event-v5-10-53b285203794@daynix.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/hw/display/apple-gfx.m b/hw/display/apple-gfx.m
index 8dde1f138dce22f2f66ad1abc6b1af35390f2c3a..174d56ae05bc3f8214327c64f6d52091ccb8c55d 100644 (file)
--- a/hw/display/apple-gfx.m
+++ b/hw/display/apple-gfx.m
@@ -454,7 +454,7 @@ static void set_cursor_glyph(void *opaque)
 /* ------ DMA (device reading system memory) ------ */
 
 typedef struct AppleGFXReadMemoryJob {
-    QemuSemaphore sem;
+    QemuEvent event;
     hwaddr physical_address;
     uint64_t length;
     void *dst;
@@ -470,7 +470,7 @@ static void apple_gfx_do_read_memory(void *opaque)
                         job->dst, job->length, MEMTXATTRS_UNSPECIFIED);
     job->success = (r == MEMTX_OK);
 
-    qemu_sem_post(&job->sem);
+    qemu_event_set(&job->event);
 }
 
 static bool apple_gfx_read_memory(AppleGFXState *s, hwaddr physical_address,
@@ -483,11 +483,11 @@ static bool apple_gfx_read_memory(AppleGFXState *s, hwaddr physical_address,
     trace_apple_gfx_read_memory(physical_address, length, dst);
 
     /* Performing DMA requires BQL, so do it in a BH. */
-    qemu_sem_init(&job.sem, 0);
+    qemu_event_init(&job.event, 0);
     aio_bh_schedule_oneshot(qemu_get_aio_context(),
                             apple_gfx_do_read_memory, &job);
-    qemu_sem_wait(&job.sem);
-    qemu_sem_destroy(&job.sem);
+    qemu_event_wait(&job.event);
+    qemu_event_destroy(&job.event);
     return job.success;
 }