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ui/surface: allocate shared memory on !win32

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Use qemu_memfd_alloc() to allocate the display surface memory, which
will fallback on tmpfile/mmap() on systems without memfd, and allow to
share the display with other processes.

This is similar to how display memory is allocated on win32 since commit
09b4c198 ("console/win32: allocate shareable display surface").

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-ID: <20241008125028.1177932-13-marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2024-10-08 16:50:21 +04:00
parent 28a3ca0478
commit ec818df000
2 changed files with 32 additions and 2 deletions
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6
include/ui/surface.h
View file

@ -26,6 +26,9 @@ typedef struct DisplaySurface {
#ifdef WIN32
HANDLE handle;
uint32_t handle_offset;
#else
int shmfd;
uint32_t shmfd_offset;
#endif
} DisplaySurface;
@ -40,6 +43,9 @@ DisplaySurface *qemu_create_placeholder_surface(int w, int h,
#ifdef WIN32
void qemu_displaysurface_win32_set_handle(DisplaySurface *surface,
HANDLE h, uint32_t offset);
#else
void qemu_displaysurface_set_shmfd(DisplaySurface *surface,
int shmfd, uint32_t offset);
#endif
DisplaySurface *qemu_create_displaysurface(int width, int height);