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Refactor and improve the SHAMap code:

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This commit combines a number of cleanups, targeting both the
code structure and the code logic. Large changes include:

 - Using more strongly-typed classes for SHAMap nodes, instead of relying
   on runtime-time detection of class types. This change saves 16 bytes
   of memory per node.
 - Improving the interface of SHAMap::addGiveItem and SHAMap::addItem to
   avoid the need for passing two bool arguments.
 - Documenting the "copy-on-write" semantics that SHAMap uses to
   efficiently track changes in individual nodes.
 - Removing unused code and simplifying several APIs.
 - Improving function naming.
This commit is contained in:
Nik Bougalis
2020-11-13 23:30:43 -08:00
parent 5def79e93c
commit 1bb294afbc
49 changed files with 1641 additions and 1378 deletions
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Builds/CMake/RippledCore.cmake
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@@ -635,7 +635,9 @@ target_sources (rippled PRIVATE
src/ripple/shamap/impl/NodeFamily.cpp
src/ripple/shamap/impl/SHAMap.cpp
src/ripple/shamap/impl/SHAMapDelta.cpp
src/ripple/shamap/impl/SHAMapInnerNode.cpp
src/ripple/shamap/impl/SHAMapItem.cpp
src/ripple/shamap/impl/SHAMapLeafNode.cpp
src/ripple/shamap/impl/SHAMapNodeID.cpp
src/ripple/shamap/impl/SHAMapSync.cpp
src/ripple/shamap/impl/SHAMapTreeNode.cpp