Initial commit

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

src/utils/utils_allocator.h

@@ -0,0 +1,69 @@
+/*
+ * Copyright(c) 2012-2018 Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause-Clear
+ */
+
+#ifndef UTILS_ALLOCATOR_H_
+#define UTILS_ALLOCATOR_H_
+
+/**
+ * @file utils_allocator.h
+ * @brief OCF memory reallocator
+ */
+
+void ocf_realloc_init(void **mem, size_t *limit);
+
+int ocf_realloc(void **mem, size_t size, size_t count, size_t *limit);
+
+int ocf_realloc_cp(void **mem, size_t size, size_t count, size_t *limit);
+
+/**
+ * @brief Initialize memory pointer and limit before reallocator usage
+ *
+ * @param[inout] mem - Pointer to the memory
+ * @param[inout] limit - Variable used internally by reallocator and indicates
+ * last allocation size
+ */
+#define OCF_REALLOC_INIT(mem, limit) \
+		ocf_realloc_init((void **)mem, limit)
+
+/**
+ * @brief De-Initialize memory pointer and limit, free memory
+ *
+ * @param[inout] mem - Pointer to the memory
+ * @param[inout] limit - Variable used internally by reallocator and indicates
+ * last allocation size
+ */
+#define OCF_REALLOC_DEINIT(mem, limit) \
+		ocf_realloc((void **)mem, 0, 0, limit)
+
+/**
+ * @brief Reallocate referenced memory if it is required.
+ *
+ * @param[inout] mem - Pointer to the memory
+ * @param[in] size - Size of particular element
+ * @param[in] count - Counts of element
+ * @param[inout] limit - Variable used internally by reallocator and indicates
+ * last allocation size
+ *
+ * @return 0 - Reallocation successful, Non zero - Realocation ERROR
+ */
+#define OCF_REALLOC(mem, size, count, limit) \
+		ocf_realloc((void **)mem, size, count, limit)
+
+/**
+ * @brief Reallocate referenced memory if it is required and copy old content
+ * into new memory space, new memory space is set to '0'
+ *
+ * @param[inout] mem - Pointer to the memory
+ * @param[in] size - Size of particular element
+ * @param[in] count - Counts of element
+ * @param[inout] limit - Variable used internally by reallocator and indicates
+ * last allocation size
+ *
+ * @return 0 - Reallocation successful, Non zero - Realocation ERROR
+ */
+#define OCF_REALLOC_CP(mem, size, count, limit) \
+		ocf_realloc_cp((void **)mem, size, count, limit)
+
+#endif /* UTILS_ALLOCATOR_H_ */