1 files changed, 108 insertions, 0 deletions
diff --git a/storage/innobase/include/mem0pool.h b/storage/innobase/include/mem0pool.h
new file mode 100644
index 00000000000..43707bd5f61
--- /dev/null
+++ b/storage/innobase/include/mem0pool.h
@@ -0,0 +1,108 @@
+/******************************************************
+The lowest-level memory management
+
+(c) 1994, 1995 Innobase Oy
+
+Created 6/9/1994 Heikki Tuuri
+*******************************************************/
+
+#ifndef mem0pool_h
+#define mem0pool_h
+
+#include "univ.i"
+#include "os0file.h"
+#include "ut0lst.h"
+
+typedef struct mem_area_struct	mem_area_t;
+typedef struct mem_pool_struct	mem_pool_t;
+
+/* The common memory pool */
+extern mem_pool_t*	mem_comm_pool;
+
+/* Memory area header */
+
+struct mem_area_struct{
+	ulint		size_and_free;	/* memory area size is obtained by
+					anding with ~MEM_AREA_FREE; area in
+					a free list if ANDing with
+					MEM_AREA_FREE results in nonzero */ 
+	UT_LIST_NODE_T(mem_area_t)
+			free_list;	/* free list node */
+};
+
+/* Each memory area takes this many extra bytes for control information */
+#define MEM_AREA_EXTRA_SIZE	(ut_calc_align(sizeof(struct mem_area_struct),\
+                                              UNIV_MEM_ALIGNMENT))
+
+/************************************************************************
+Creates a memory pool. */
+
+mem_pool_t*
+mem_pool_create(
+/*============*/
+			/* out: memory pool */
+	ulint	size);	/* in: pool size in bytes */
+/************************************************************************
+Allocates memory from a pool. NOTE: This low-level function should only be
+used in mem0mem.*! */
+
+void*
+mem_area_alloc(
+/*===========*/
+				/* out, own: allocated memory buffer */
+	ulint		size,	/* in: allocated size in bytes; for optimum
+				space usage, the size should be a power of 2
+				minus MEM_AREA_EXTRA_SIZE */
+	mem_pool_t*	pool);	/* in: memory pool */
+/************************************************************************
+Frees memory to a pool. */
+
+void
+mem_area_free(
+/*==========*/
+	void*		ptr,	/* in, own: pointer to allocated memory
+				buffer */
+	mem_pool_t*	pool);	/* in: memory pool */
+/************************************************************************
+Returns the amount of reserved memory. */
+
+ulint
+mem_pool_get_reserved(
+/*==================*/
+				/* out: reserved mmeory in bytes */
+	mem_pool_t*	pool);	/* in: memory pool */
+/************************************************************************
+Reserves the mem pool mutex. */
+
+void
+mem_pool_mutex_enter(void);
+/*======================*/
+/************************************************************************
+Releases the mem pool mutex. */
+
+void
+mem_pool_mutex_exit(void);
+/*=====================*/
+/************************************************************************
+Validates a memory pool. */
+
+ibool
+mem_pool_validate(
+/*==============*/
+				/* out: TRUE if ok */
+	mem_pool_t*	pool);	/* in: memory pool */
+/************************************************************************
+Prints info of a memory pool. */
+
+void
+mem_pool_print_info(
+/*================*/
+	FILE*	        outfile,/* in: output file to write to */
+	mem_pool_t*	pool);	/* in: memory pool */
+
+
+#ifndef UNIV_NONINL
+#include "mem0pool.ic"
+#endif
+
+#endif