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authormidipix <writeonce@midipix.org>2024-05-25 18:18:11 +0000
committermidipix <writeonce@midipix.org>2024-05-26 03:41:26 +0000
commitacc91bc260046e228d8043e91d33d6793fb41c1a (patch)
treea40b97ddd7cf5c1c988388e52664aea35027f74d /src/logic
parentbef28deed2d3560dd25d3fe8c0024c94a6b15f8b (diff)
downloadtpax-acc91bc260046e228d8043e91d33d6793fb41c1a.tar.bz2
tpax-acc91bc260046e228d8043e91d33d6793fb41c1a.tar.xz
driver: implemented internal queue vectorization.
Diffstat (limited to 'src/logic')
-rw-r--r--src/logic/tpax_queue_vector.c60
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;
+}