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New plans for macros

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About to move them completely to stdlib
This commit is contained in:
Lawrence Bethlenfalvy
2024-08-18 22:57:06 +02:00
parent 11951ede43
commit 3a63894de2
78 changed files with 2557 additions and 1980 deletions
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notes/comm_arch.md
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- **Protocol definition** plain objects that define nothing beside serialization/deserialization and English descriptions of invariants (`orchid-api`)
- **Active objects** smart objects that represent resources and communicate their modification through the protocol, sorted into 3 categories for asymmetric communication: common/extension/host. Some ext/host logic is defined in `orchid-base` to ensure that other behaviour within it can rely on certain global functionality. ext/host also manage their respective connection state (`orchid-base`, `orchid-extension`, `orchid-host`)
- **Active objects** smart objects that represent resources and communicate commands and queries through the protocol, sorted into 3 categories for asymmetric communication: common/extension/host. Some ext/host logic is defined in `orchid-base` to ensure that other behaviour within it can rely on certain global functionality. ext/host also manage their respective connection state (`orchid-base`, `orchid-extension`, `orchid-host`)
- **Application** (client, server) binaries that use active objects to implement actual application behaviour (`orcx`, `orchid-std`)

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notes/expr_refs.md Normal file
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# Reference hierarchy of the host
Reference loops are resource leaks. There are two primary ways to avoid reference loops; a strict hierarchy between types is the easiest. The expression tree uses a less obvious hierarchy where expressions are only able to reference expressions that are older than them.
- Trees reference Constants
- Constants reference their constituent Expressions
- Expressions reference Atoms
- During evaluation, Constants replace their unbound names with Constants
- There is a reference cycle here, but it always goes through a Constant.
> **todo** A potential fix may be to update all Constants to point to a dummy value before freeing Trees
- Atoms reference the Systems that implement them
- Atoms may reference Expressions that are not younger than them
- This link is managed by the System but tied to Atom and not System lifecycle
- Atoms can technically be applied to themselves, but it's a copying apply so it probably isn't a risk factor
- Systems reference the Extension that contains them
- Extensions reference the Port that connects them
- The Extension signals the remote peer to disconnect on drop
- The port is also referenced in a loose receiver thread, which always eventually tries to find the Extension or polls for ingress so it always eventually exits after the Extension's drop handler is called