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74ae66ddbc
Adds volatile load/store capability to the impure part of the standard library. Note that this currently only supports numerical types. Should resolve https://github.com/nim-lang/Nim/issues/3382
31 lines
963 B
Nim
31 lines
963 B
Nim
#
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#
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# Nim's Runtime Library
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# (c) Copyright 2017 Jeff Ciesielski
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#
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# See the file "copying.txt", included in this
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# distribution, for details about the copyright.
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#
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## This module contains code for generating volatile loads and stores,
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## which are useful in embedded and systems programming.
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template volatileLoad*[T](src: ptr T): T =
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## Generates a volatile load of the value stored in the container `src`.
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## Note that this only effects code generation on `C` like backends
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when defined(js):
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src[]
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else:
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var res: T
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{.emit: [res, " = (*(", type(src[]), " volatile*)", src, ");"].}
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res
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template volatileStore*[T](dest: ptr T, val: T) =
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## Generates a volatile store into the container `dest` of the value
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## `val`. Note that this only effects code generation on `C` like
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## backends
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when defined(js):
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dest[] = val
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else:
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{.emit: ["*((", type(dest[]), " volatile*)(", dest, ")) = ", val, ";"].}
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