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https://github.com/status-im/nimbus-eth1.git
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01fe172738
* Renamed type `NoneBackendRef` => `VoidBackendRef` * Clarify names: `BE=filter+backend` and `UBE=backend (unfiltered)` why: Most functions used full names as `getVtxUnfilteredBackend()` or `getKeyBackend()`. After defining abbreviations (and its meaning) it seems easier to use `getVtxUBE()` and `getKeyBE()`. * Integrate `hashify()` process into transaction logic why: Is now transparent unless explicitly controlled. details: Cache changes imply setting a `dirty` flag which in turn triggers `hashify()` processing in transaction and `pack()` directives. * Removed `aristo_tx.exec()` directive why: Inconsistent implementation, functionality will be provided with a different paradigm.
79 lines
2.4 KiB
Nim
79 lines
2.4 KiB
Nim
# nimbus-eth1
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# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed
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# except according to those terms.
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## Non persistent constructors for Aristo DB
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## =========================================
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##
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{.push raises: [].}
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import
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results,
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../aristo_desc,
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../aristo_desc/aristo_types_backend,
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"."/[aristo_init_common, aristo_memory]
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type
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VoidBackendRef* = ref object of TypedBackendRef
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## Dummy descriptor type, will typically used as `nil` reference
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export
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AristoBackendType,
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VoidBackendRef,
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MemBackendRef,
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TypedBackendRef
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# ------------------------------------------------------------------------------
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# Public database constuctors, destructor
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# ------------------------------------------------------------------------------
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proc newAristoDbRef*(
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backend: static[AristoBackendType];
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): AristoDbRef =
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## Simplified prototype for `BackendNone` and `BackendMemory` type backend.
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when backend == BackendVoid:
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AristoDbRef(top: AristoLayerRef())
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elif backend == BackendMemory:
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AristoDbRef(top: AristoLayerRef(), backend: memoryBackend())
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elif backend == BackendRocksDB:
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{.error: "Aristo DB backend \"BackendRocksDB\" needs basePath argument".}
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else:
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{.error: "Unknown/unsupported Aristo DB backend".}
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# -----------------
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proc finish*(db: AristoDbRef; flush = false) =
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## Backend destructor. The argument `flush` indicates that a full database
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## deletion is requested. If set ot left `false` the outcome might differ
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## depending on the type of backend (e.g. the `BackendMemory` backend will
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## always flush on close.)
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##
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## This distructor may be used on already *destructed* descriptors.
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if not db.backend.isNil:
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db.backend.closeFn flush
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db.backend = AristoBackendRef(nil)
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db.top = AristoLayerRef(nil)
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db.stack.setLen(0)
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# -----------------
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proc to*[W: TypedBackendRef|MemBackendRef|VoidBackendRef](
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db: AristoDbRef;
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T: type W;
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): T =
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## Handy helper for lew-level access to some backend functionality
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db.backend.T
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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