1 files changed, 125 insertions, 0 deletions
diff --git a/sys/lib/ptrbox.c b/sys/lib/ptrbox.c
new file mode 100644
index 0000000..d2e9171
--- /dev/null
+++ b/sys/lib/ptrbox.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/cdefs.h>
+#include <sys/errno.h>
+#include <vm/kalloc.h>
+#include <lib/ptrbox.h>
+
+static void *
+ptrbox_heapalloc(struct ptrbox *pbox, size_t len)
+{
+    struct ptrbox_aldes *aldes;
+    void *mem;
+
+    if (pbox == NULL || len == 0) {
+        return NULL;
+    }
+
+    mem = kalloc(len);
+    if (mem == NULL) {
+        return NULL;
+    }
+
+    /* Allocate a descriptor */
+    aldes = kalloc(sizeof(*aldes));
+    if (aldes == NULL) {
+        kfree(mem);
+        return NULL;
+    }
+
+    /* Initialize our descriptor */
+    aldes->type = PTRBOX_HEAP;
+    aldes->base = mem;
+    aldes->length = len;
+
+    /* Push it to the pointer box */
+    TAILQ_INSERT_TAIL(&pbox->allist, aldes, link);
+    ++pbox->alcnt;
+    return mem;
+}
+
+void *
+ptrbox_alloc(struct ptrbox *pbox, size_t len, ptrbox_altype_t type)
+{
+    if (pbox == NULL || len == 0) {
+        return NULL;
+    }
+
+    switch (type) {
+    case PTRBOX_HEAP:
+        return ptrbox_heapalloc(pbox, len);
+    default:
+        return NULL;
+    }
+
+    return NULL;
+}
+
+void
+ptrbox_free(struct ptrbox *pbox)
+{
+    struct ptrbox_aldes *desc;
+
+    if (pbox == NULL) {
+        return;
+    }
+
+    TAILQ_FOREACH(desc, &pbox->allist, link) {
+        if (__unlikely(desc == NULL)) {
+            continue;
+        }
+
+        if (desc->base == NULL) {
+            kfree(desc);
+            continue;
+        }
+
+        switch (desc->type) {
+        case PTRBOX_HEAP:
+            kfree(desc->base);
+            break;
+        }
+
+        kfree(desc);
+    }
+}
+
+int
+ptrbox_init(struct ptrbox *pbox)
+{
+    if (pbox == NULL) {
+        return -EINVAL;
+    }
+
+    TAILQ_INIT(&pbox->allist);
+    pbox->alcnt = 0;
+    return 0;
+}