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-rw-r--r--lib/librte_acl/tb_mem.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/lib/librte_acl/tb_mem.c b/lib/librte_acl/tb_mem.c
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+++ b/lib/librte_acl/tb_mem.c
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+/*-
+ * 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;
+}