Diff: btstack/memory_pool.h

Revision:

0:fccb789424fc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/btstack/memory_pool.h	Mon Jun 10 16:01:50 2013 +0000
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+/*
+ * Copyright (C) 2011 by Matthias Ringwald
+ *
+ * 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 the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD 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 MATTHIAS
+ * RINGWALD 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.
+ *
+ */
+
+/*
+ *  memory_pool.h
+ *
+ *  @Brief Fixed-size block allocation
+ *
+ *  @Assumption block_size >= sizeof(void *)
+ *  @Assumption size of storage >= count * block_size
+ *
+ *  @Note minimal implementation, no error checking/handling
+ */
+
+#pragma once
+
+typedef void * memory_pool_t;
+
+// initialize memory pool with with given storage, block size and count
+void   memory_pool_create(memory_pool_t *pool, void * storage, int count, int block_size);
+
+// get free block from pool, @returns NULL or pointer to block
+void * memory_pool_get(memory_pool_t *pool);
+
+// return previously reserved block to memory pool
+void   memory_pool_free(memory_pool_t *pool, void * block);