driver: implemented internal queue vectorization.

1 files changed, 60 insertions, 0 deletions

diff --git a/src/logic/tpax_queue_vector.c b/src/logic/tpax_queue_vector.c
new file mode 100644
index 0000000..092f39f
--- /dev/null
+++ b/src/logic/tpax_queue_vector.c
@@ -0,0 +1,60 @@
+/**************************************************************/
+/*  tpax: a topological pax implementation                    */
+/*  Copyright (C) 2020--2024  SysDeer Technologies, LLC       */
+/*  Released under GPLv2 and GPLv3; see COPYING.TPAX.         */
+/**************************************************************/
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <tpax/tpax.h>
+#include "tpax_driver_impl.h"
+#include "tpax_errinfo_impl.h"
+#include "tpax_visibility_impl.h"
+
+tpax_hidden int tpax_update_queue_vector(const struct tpax_driver_ctx * dctx)
+{
+	uintptr_t                       addr;
+	struct tpax_driver_ctx_impl *   ictx;
+	struct tpax_dirent_buffer *     dentbuf;
+	struct tpax_dirent **           direntv;
+	struct tpax_dirent *            cdent;
+	struct tpax_dirent *            cnext;
+	size_t                          arrsize;
+
+	/* driver */
+	ictx = tpax_get_driver_ictx(dctx);
+
+	/* vector alloc */
+	if (ictx->direntv)
+		free(ictx->direntv);
+
+	arrsize = ictx->nqueued + 1;
+
+	if (!(ictx->direntv = calloc(arrsize,sizeof(struct tpax_dirent *))))
+		return TPAX_SYSTEM_ERROR(dctx);
+
+	if (ictx->nqueued == 0)
+		return 0;
+
+	/* queue vector */
+	dentbuf = tpax_get_driver_dirents(dctx);
+	cdent   = dentbuf->dbuf;
+
+	for (direntv=ictx->direntv; cdent; direntv++) {
+		*direntv = cdent;
+
+		addr  = (uintptr_t)cdent;
+		addr += cdent->nsize;
+		cnext = (struct tpax_dirent *)addr;
+
+		if (cnext == dentbuf->cdent) {
+			dentbuf = dentbuf->next;
+			cnext   = dentbuf ? dentbuf->dbuf : 0;
+		}
+
+		cdent = cnext;
+	}
+
+	return 0;
+}