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diff --git a/ioreplay/src/datas/amap.h b/ioreplay/src/datas/amap.h
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+// Copyright 2018 Mimecast Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef AMAP_H
+#define AMAP_H
+
+#include "../defaults.h"
+
+#define AMAP_MAX_ARRAY_LENGTH 1024*8
+
+/**
+ * @brief Implements an array map data structure
+ *
+ * This array map can hold a HUGE amount of entries by allocating multiple
+ * smaller arrays. There are two version of the amap data structure available:
+ * a memory mapped (mmap) and a normal version. The memory mapped version can
+ * be used for IPC between various processes.
+ */
+typedef struct amap_s_ {
+    void*** arrays; /**< The pointers to the amap arrays */
+    int num_arrays; /**< The amount of arrays used in the amap */
+    long size; /**< The total size/capacity of the amap */
+    bool mmapped; /**< True if amap is memory mapped */
+    void (*data_destroy)(void *data); /**< Callback to destroy all elements */
+} amap_s;
+
+amap_s* amap_new(const long size);
+amap_s* amap_new_mmapped(const long size);
+int amap_set(amap_s *a, const long position, void* value);
+void* amap_get(amap_s *a, const long position);
+void* amap_unset(amap_s *a, const long position);
+void amap_print(amap_s *a);
+void amap_destroy(amap_s *a);
+void amap_reset(amap_s *a);
+void amap_run_cb(amap_s *a, void (*cb)(void *data));
+void amap_test(void);
+
+#endif // AMAP_H