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Implement a Counting Lock #65

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erlingrj opened this issue Mar 12, 2023 · 1 comment
Open

Implement a Counting Lock #65

erlingrj opened this issue Mar 12, 2023 · 1 comment
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@erlingrj
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The counting lock can be implemented as a special CSR, one per HW thread which has the following semantics.

  • The CSR has an owner, which is a thread, this can be static.
  • Only the owner can write to the CSR
  • Other threads can do a wait_until on the CSR. This operation will but the thread in idle mode until the CSR reaches that value.

This is intended to be used in quasi-static scheduling of Lingua Franca programs
@erlingrj
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@sberkun has expressed interest in pursuing this

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