Untangling Lifetimes: The Arena Allocator

• cosmopolitan

  201 15,370 9.8 C

  build-once run-anywhere c library

And Cosmopolitan Libc uses CreateFileMapping() + MapViewOfFileEx() + VirtualProtect() to implement mmap(MAP_ANONYMOUS) https://github.com/jart/cosmopolitan/blob/master/libc/intrin... so I guess that'd be the alternative to VirtualAlloc().

• express-c

  7 16 6.3 C

  Fast, unopinionated, minimalist web framework for C

I use arenas for HTTP request handlers. The JSON built or parsed is only going to be around for the lifetime of the request. It's much simpler and faster to use an arena than to do reference counting wrapped around malloc/free.

Here's an example where in a commit I swapped in an arena:

https://github.com/williamcotton/express-c/commit/4ae53f38e3...

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

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