st/prober: Provide a default implementation of xrt_instance interface

src/xrt/state_trackers/prober/CMakeLists.txt

@@ -6,6 +6,7 @@ set(PROBER_INCLUDES)
 set(PROBER_SOURCE_FILES
 	p_documentation.h
 	p_dump.c
+	p_instance.c
 	p_json.c
 	p_prober.c
 	p_prober.h

src/xrt/state_trackers/prober/meson.build

@@ -4,6 +4,7 @@
 prober_sources = [
 	'p_documentation.h',
 	'p_dump.c',
+	'p_instance.c',
 	'p_json.c',
 	'p_prober.c',
 	'p_prober.h',

src/xrt/state_trackers/prober/p_instance.c

@@ -0,0 +1,114 @@
+
+
+#include "xrt/xrt_prober.h"
+#include "xrt/xrt_instance.h"
+#include "xrt/xrt_gfx_fd.h"
+
+#include "util/u_misc.h"
+
+
+/*
+ *
+ * Struct and helpers.
+ *
+ */
+
+struct p_instance
+{
+	struct xrt_instance base;
+	struct xrt_prober *xp;
+};
+
+static inline struct p_instance *
+p_instance(struct xrt_instance *xinst)
+{
+	return (struct p_instance *)xinst;
+}
+
+
+/*
+ *
+ * Member functions.
+ *
+ */
+
+static int
+p_instance_select(struct xrt_instance *xinst,
+                  struct xrt_device **xdevs,
+                  size_t num_xdevs)
+{
+	struct p_instance *pinst = p_instance(xinst);
+
+	int ret = xrt_prober_probe(pinst->xp);
+	if (ret < 0) {
+		return ret;
+	}
+
+	return xrt_prober_select(pinst->xp, xdevs, num_xdevs);
+}
+
+static int
+p_instance_create_fd_compositor(struct xrt_instance *xinst,
+                                struct xrt_device *xdev,
+                                bool flip_y,
+                                struct xrt_compositor_fd **out_xcfd)
+{
+	struct xrt_compositor_fd *xcfd =
+	    xrt_gfx_provider_create_fd(xdev, flip_y);
+
+	if (xcfd == NULL) {
+		return -1;
+	}
+
+	*out_xcfd = xcfd;
+
+	return 0;
+}
+
+static int
+p_instance_get_prober(struct xrt_instance *xinst, struct xrt_prober **out_xp)
+{
+	struct p_instance *pinst = p_instance(xinst);
+
+	*out_xp = pinst->xp;
+
+	return 0;
+}
+
+static void
+p_instance_destroy(struct xrt_instance *xinst)
+{
+	struct p_instance *pinst = p_instance(xinst);
+
+	xrt_prober_destroy(&pinst->xp);
+	free(pinst);
+}
+
+
+/*
+ *
+ * Exported function(s).
+ *
+ */
+
+int
+xrt_instance_create(struct xrt_instance **out_xinst)
+{
+	struct xrt_prober *xp = NULL;
+
+	int ret = xrt_prober_create(&xp);
+	if (ret < 0) {
+		return ret;
+	}
+
+	struct p_instance *pinst = U_TYPED_CALLOC(struct p_instance);
+	pinst->base.select = p_instance_select;
+	pinst->base.create_fd_compositor = p_instance_create_fd_compositor;
+	pinst->base.get_prober = p_instance_get_prober;
+	pinst->base.destroy = p_instance_destroy;
+	pinst->xp = xp;
+
+	*out_xinst = &pinst->base;
+
+	return 0;
+}