Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_acl / tb_mem.c

diff --git a/lib/librte_acl/tb_mem.c b/lib/librte_acl/tb_mem.c
new file mode 100644 (file)
index 0000000..157e608
--- /dev/null
+++ b/lib/librte_acl/tb_mem.c
@@ -0,0 +1,108 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   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 Intel Corporation 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 "tb_mem.h"
+
+/*
+ *  Memory management routines for temporary memory.
+ *  That memory is used only during build phase and is released after
+ *  build is finished.
+ *  Note, that tb_pool/tb_alloc() are not supposed to return NULL.
+ *  Instead, in the case of failure to allocate memory,
+ *  it would do siglongjmp(pool->fail).
+ *  It is responsibility of the caller to save the proper context/environment,
+ *  in the pool->fail before calling tb_alloc() for the given pool first time.
+ */
+
+static struct tb_mem_block *
+tb_pool(struct tb_mem_pool *pool, size_t sz)
+{
+       struct tb_mem_block *block;
+       uint8_t *ptr;
+       size_t size;
+
+       size = sz + pool->alignment - 1;
+       block = calloc(1, size + sizeof(*pool->block));
+       if (block == NULL) {
+               RTE_LOG(ERR, MALLOC, "%s(%zu)\n failed, currently allocated "
+                       "by pool: %zu bytes\n", __func__, sz, pool->alloc);
+               siglongjmp(pool->fail, -ENOMEM);
+               return NULL;
+       }
+
+       block->pool = pool;
+
+       block->next = pool->block;
+       pool->block = block;
+
+       pool->alloc += size;
+
+       ptr = (uint8_t *)(block + 1);
+       block->mem = RTE_PTR_ALIGN_CEIL(ptr, pool->alignment);
+       block->size = size - (block->mem - ptr);
+
+       return block;
+}
+
+void *
+tb_alloc(struct tb_mem_pool *pool, size_t size)
+{
+       struct tb_mem_block *block;
+       void *ptr;
+       size_t new_sz;
+
+       size = RTE_ALIGN_CEIL(size, pool->alignment);
+
+       block = pool->block;
+       if (block == NULL || block->size < size) {
+               new_sz = (size > pool->min_alloc) ? size : pool->min_alloc;
+               block = tb_pool(pool, new_sz);
+       }
+       ptr = block->mem;
+       block->size -= size;
+       block->mem += size;
+       return ptr;
+}
+
+void
+tb_free_pool(struct tb_mem_pool *pool)
+{
+       struct tb_mem_block *next, *block;
+
+       for (block = pool->block; block != NULL; block = next) {
+               next = block->next;
+               free(block);
+       }
+       pool->block = NULL;
+       pool->alloc = 0;
+}