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, 76 insertions, 0 deletions

diff --git a/src/runtime/OffsetLifetimeManager.cpp b/src/runtime/OffsetLifetimeManager.cpp
new file mode 100644
index 0000000000..4540aeab28
--- /dev/null
+++ b/src/runtime/OffsetLifetimeManager.cpp
@@ -0,0 +1,76 @@
+/*
+ * 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.
+ */
+#include "arm_compute/runtime/OffsetLifetimeManager.h"
+
+#include "arm_compute/core/Error.h"
+#include "arm_compute/runtime/IAllocator.h"
+#include "arm_compute/runtime/IMemoryGroup.h"
+#include "arm_compute/runtime/OffsetMemoryPool.h"
+#include "support/ToolchainSupport.h"
+
+#include <algorithm>
+#include <cmath>
+#include <map>
+#include <vector>
+
+using namespace arm_compute;
+
+OffsetLifetimeManager::OffsetLifetimeManager()
+    : _blob(0)
+{
+}
+
+std::unique_ptr<IMemoryPool> OffsetLifetimeManager::create_pool(IAllocator *allocator)
+{
+    ARM_COMPUTE_ERROR_ON(allocator == nullptr);
+    return support::cpp14::make_unique<OffsetMemoryPool>(allocator, _blob);
+}
+
+MappingType OffsetLifetimeManager::mapping_type() const
+{
+    return MappingType::OFFSETS;
+}
+
+void OffsetLifetimeManager::update_blobs_and_mappings()
+{
+    ARM_COMPUTE_ERROR_ON(!are_all_finalized());
+    ARM_COMPUTE_ERROR_ON(_active_group == nullptr);
+
+    // Update blob size
+    size_t max_group_size = std::accumulate(std::begin(_active_elements), std::end(_active_elements), static_cast<size_t>(0), [](size_t s, const Element & e)
+    {
+        return s + e.size;
+    });
+    _blob = std::max(_blob, max_group_size);
+
+    // Calculate group mappings
+    auto &group_mappings = _active_group->mappings();
+    size_t offset         = 0;
+    for(auto &e : _active_elements)
+    {
+        group_mappings[e.handle] = offset;
+        offset += e.size;
+        ARM_COMPUTE_ERROR_ON(offset > _blob);
+    }
+}