kernel: vm: Add port of TLSF

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/sys/vm/vm_dynalloc.c b/sys/vm/vm_dynalloc.c
new file mode 100644
index 0000000..0b8d668
--- /dev/null
+++ b/sys/vm/vm_dynalloc.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2023-2024 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 <vm/dynalloc.h>
+#include <vm/vm.h>
+
+/*
+ * Dynamically allocates memory
+ *
+ * @sz: The amount of bytes to allocate
+ */
+void *
+dynalloc(size_t sz)
+{
+    struct vm_ctx *vm_ctx = vm_get_ctx();
+    void *tmp;
+
+    spinlock_acquire(&vm_ctx->dynalloc_lock);
+    tmp = tlsf_malloc(vm_ctx->tlsf_ctx, sz);
+    spinlock_release(&vm_ctx->dynalloc_lock);
+    return tmp;
+}
+
+/*
+ * Reallocates memory pool created by `dynalloc()'
+ *
+ * @old_ptr: Pointer to old pool.
+ * @newsize: Size of new pool.
+ */
+void *
+dynrealloc(void *old_ptr, size_t newsize)
+{
+    struct vm_ctx *vm_ctx = vm_get_ctx();
+    void *tmp;
+
+    spinlock_acquire(&vm_ctx->dynalloc_lock);
+    tmp = tlsf_realloc(vm_ctx->tlsf_ctx, old_ptr, newsize);
+    spinlock_release(&vm_ctx->dynalloc_lock);
+    return tmp;
+}
+
+/*
+ * Free dynamically allocated memory
+ *
+ * @ptr: Pointer to base of memory.
+ */
+void
+dynfree(void *ptr)
+{
+    struct vm_ctx *vm_ctx = vm_get_ctx();
+
+    spinlock_acquire(&vm_ctx->dynalloc_lock);
+    tlsf_free(vm_ctx->tlsf_ctx, ptr);
+    spinlock_release(&vm_ctx->dynalloc_lock);
+}