kernel: vm: Port TLSF allocator

This commit adds a Two-Level Segregated Fit memory allocator port to the
Hyra kernelspace.

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

1 files changed, 90 insertions, 0 deletions

diff --git a/sys/include/vm/tlsf.h b/sys/include/vm/tlsf.h
new file mode 100644
index 0000000..e9b5a91
--- /dev/null
+++ b/sys/include/vm/tlsf.h
@@ -0,0 +1,90 @@
+#ifndef INCLUDED_tlsf

+#define INCLUDED_tlsf

+

+/*

+** Two Level Segregated Fit memory allocator, version 3.1.

+** Written by Matthew Conte

+**	http://tlsf.baisoku.org

+**

+** Based on the original documentation by Miguel Masmano:

+**	http://www.gii.upv.es/tlsf/main/docs

+**

+** This implementation was written to the specification

+** of the document, therefore no GPL restrictions apply.

+** 

+** Copyright (c) 2006-2016, Matthew Conte

+** All rights reserved.

+** 

+** Redistribution and use in source and binary forms, with or without

+** modification, are permitted provided that the following conditions are met:

+**     * Redistributions of source code must retain the above copyright

+**       notice, this list of conditions and the following disclaimer.

+**     * 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.

+**     * Neither the name of the copyright holder 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 MATTHEW CONTE 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 <stddef.h>

+

+#if defined(__cplusplus)

+extern "C" {

+#endif

+

+/* tlsf_t: a TLSF structure. Can contain 1 to N pools. */

+/* pool_t: a block of memory that TLSF can manage. */

+typedef void* tlsf_t;

+typedef void* pool_t;

+

+/* Create/destroy a memory pool. */

+tlsf_t tlsf_create(void* mem);

+tlsf_t tlsf_create_with_pool(void* mem, size_t bytes);

+void tlsf_destroy(tlsf_t tlsf);

+pool_t tlsf_get_pool(tlsf_t tlsf);

+

+/* Add/remove memory pools. */

+pool_t tlsf_add_pool(tlsf_t tlsf, void* mem, size_t bytes);

+void tlsf_remove_pool(tlsf_t tlsf, pool_t pool);

+

+/* malloc/memalign/realloc/free replacements. */

+void* tlsf_malloc(tlsf_t tlsf, size_t bytes);

+void* tlsf_memalign(tlsf_t tlsf, size_t align, size_t bytes);

+void* tlsf_realloc(tlsf_t tlsf, void* ptr, size_t size);

+void tlsf_free(tlsf_t tlsf, void* ptr);

+

+/* Returns internal block size, not original request size */

+size_t tlsf_block_size(void* ptr);

+

+/* Overheads/limits of internal structures. */

+size_t tlsf_size(void);

+size_t tlsf_align_size(void);

+size_t tlsf_block_size_min(void);

+size_t tlsf_block_size_max(void);

+size_t tlsf_pool_overhead(void);

+size_t tlsf_alloc_overhead(void);

+

+/* Debugging. */

+typedef void (*tlsf_walker)(void* ptr, size_t size, int used, void* user);

+void tlsf_walk_pool(pool_t pool, tlsf_walker walker, void* user);

+/* Returns nonzero if any internal consistency check fails. */

+int tlsf_check(tlsf_t tlsf);

+int tlsf_check_pool(pool_t pool);

+

+#if defined(__cplusplus)

+};

+#endif

+

+#endif