1 files changed, 92 insertions, 0 deletions
diff --git a/src/mercury/mercury_mem.h b/src/mercury/mercury_mem.h
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+++ b/src/mercury/mercury_mem.h
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+/*
+ * Copyright (C) 2013-2019 Argonne National Laboratory, Department of Energy,
+ *                    UChicago Argonne, LLC and The HDF Group.
+ * All rights reserved.
+ *
+ * The full copyright notice, including terms governing use, modification,
+ * and redistribution, is contained in the COPYING file that can be
+ * found at the root of the source code distribution tree.
+ */
+
+#ifndef MERCURY_MEM_H
+#define MERCURY_MEM_H
+
+#include "mercury_util_config.h"
+
+/*************************************/
+/* Public Type and Struct Definition */
+/*************************************/
+
+/*****************/
+/* Public Macros */
+/*****************/
+
+#define HG_MEM_CACHE_LINE_SIZE 64
+#define HG_MEM_PAGE_SIZE       4096
+
+/*********************/
+/* Public Prototypes */
+/*********************/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Get system default page size.
+ *
+ * \return page size on success or negative on failure
+ */
+HG_UTIL_PUBLIC long
+hg_mem_get_page_size(void);
+
+/**
+ * Allocate size bytes and return a pointer to the allocated memory.
+ * The memory address will be a multiple of alignment, which must be a power of
+ * two, and size should be a multiple of alignment.
+ *
+ * \param alignment [IN]        alignment size
+ * \param size [IN]             total requested size
+ *
+ * \return a pointer to the allocated memory, or NULL in case of failure
+ */
+HG_UTIL_PUBLIC void *
+hg_mem_aligned_alloc(size_t alignment, size_t size);
+
+/**
+ * Free memory allocated from hg_aligned_alloc().
+ *
+ * \param mem_ptr [IN]          pointer to allocated memory
+ */
+HG_UTIL_PUBLIC void
+hg_mem_aligned_free(void *mem_ptr);
+
+/**
+ * Create/open a shared-memory mapped file of size \size with name \name.
+ *
+ * \param name [IN]             name of mapped file
+ * \param size [IN]             total requested size
+ * \param create [IN]           create file if not existing
+ *
+ * \return a pointer to the mapped memory region, or NULL in case of failure
+ */
+HG_UTIL_PUBLIC void *
+hg_mem_shm_map(const char *name, size_t size, hg_util_bool_t create);
+
+/**
+ * Unmap a previously mapped region and close the file.
+ *
+ * \param name [IN]             name of mapped file
+ * \param mem_ptr [IN]          pointer to mapped memory region
+ * \param size [IN]             size range of the mapped region
+ *
+ * \return non-negative on success, or negative in case of failure
+ */
+HG_UTIL_PUBLIC int
+hg_mem_shm_unmap(const char *name, void *mem_ptr, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MERCURY_MEM_H */