COMPMID-485: Offset-based memory manager support.

Adds support for offset-based memory mappings used from CPU system
memory and SVM based allocations.

Change-Id: Ibee6a3c02a61df9b11fe8878cfe40dc6fd9a4be0
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/88307
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/arm_compute/runtime/OffsetLifetimeManager.h b/arm_compute/runtime/OffsetLifetimeManager.h
new file mode 100644
index 0000000000..e39d6a0d6a
--- /dev/null
+++ b/arm_compute/runtime/OffsetLifetimeManager.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_OFFSETLIFETIMEMANAGER_H__
+#define __ARM_COMPUTE_OFFSETLIFETIMEMANAGER_H__
+
+#include "arm_compute/runtime/ISimpleLifetimeManager.h"
+
+#include "arm_compute/runtime/Types.h"
+
+#include <cstddef>
+#include <map>
+#include <vector>
+
+namespace arm_compute
+{
+class IMemoryPool;
+
+/** Concrete class that tracks the lifetime of registered tensors and
+ *  calculates the systems memory requirements in terms of a single blob and a list of offsets */
+class OffsetLifetimeManager : public ISimpleLifetimeManager
+{
+public:
+    /** Constructor */
+    OffsetLifetimeManager();
+    /** Prevent instances of this class to be copy constructed */
+    OffsetLifetimeManager(const OffsetLifetimeManager &) = delete;
+    /** Prevent instances of this class to be copied */
+    OffsetLifetimeManager &operator=(const OffsetLifetimeManager &) = delete;
+    /** Allow instances of this class to be move constructed */
+    OffsetLifetimeManager(OffsetLifetimeManager &&) = default;
+    /** Allow instances of this class to be moved */
+    OffsetLifetimeManager &operator=(OffsetLifetimeManager &&) = default;
+
+    // Inherited methods overridden:
+    std::unique_ptr<IMemoryPool> create_pool(IAllocator *allocator) override;
+    MappingType mapping_type() const override;
+
+private:
+    // Inherited methods overridden:
+    void update_blobs_and_mappings() override;
+
+private:
+    size_t _blob; /**< Memory blob size */
+};
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_OFFSETLIFETIMEMANAGER_H__ */