This allows to share the buffer data by mmapping the fd again.
---
src/wayland-server-core.h | 6 ++++++
src/wayland-shm.c | 16 +++++++++++++++-
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/src/wayland-server-core.h b/src/wayland-server-core.h
index 7d03789..938cdf7 100644
--- a/src/wayland-server-core.h
+++ b/src/wayland-server-core.h
@@ -396,6 +396,12 @@ wl_shm_buffer_create(struct wl_client *client,
uint32_t id, int32_t width, int32_t height,
int32_t stride, uint32_t format);
+int
+wl_shm_buffer_get_offset(struct wl_shm_buffer *buffer);
+
+int
+wl_shm_buffer_get_fd(struct wl_shm_buffer *buffer);
+
void wl_log_set_handler_server(wl_log_func_t handler);
#ifdef __cplusplus
diff --git a/src/wayland-shm.c b/src/wayland-shm.c
index b6b31d6..c85e839 100644
--- a/src/wayland-shm.c
+++ b/src/wayland-shm.c
@@ -52,6 +52,7 @@ struct wl_shm_pool {
int refcount;
char *data;
int32_t size;
+ int fd;
};
struct wl_shm_buffer {
@@ -77,6 +78,7 @@ shm_pool_unref(struct wl_shm_pool *pool)
return;
munmap(pool->data, pool->size);
+ close(pool->fd);
free(pool);
}
@@ -250,7 +252,7 @@ shm_create_pool(struct wl_client *client, struct
wl_resource *resource,
"failed mmap fd %d", fd);
goto err_close;
}
- close(fd);
+ pool->fd = fd;
pool->resource =
wl_resource_create(client, &wl_shm_pool_interface, 1, id);
@@ -409,6 +411,18 @@ wl_shm_buffer_get_height(struct wl_shm_buffer *buffer)
return buffer->height;
}
+WL_EXPORT int
+wl_shm_buffer_get_offset(struct wl_shm_buffer *buffer)
+{
+ return buffer->offset;
+}
+
+WL_EXPORT int
+wl_shm_buffer_get_fd(struct wl_shm_buffer *buffer)
+{
+ return buffer->pool->fd;
+}
+
static void
reraise_sigbus(void)
{
--
2.4.5
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