Introduce PAL function table #10675
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Introduce PAL function table #10675
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Summary: This is part 1 of the implementation of the PAL changes described in pytorch#10432. This PR introduces a struct (`pal_table`) to hold function pointers to the PAL function implementations. There is a singleton instance of this struct, which is initialized with the weak/strong et_pal_ functions - maintaining backwards compatibility with the existing override mechanism. I've then added wrapper functions for the PAL into the executorch::runtime namespace which dispatch through the function table. It is intended that callers use these functions instead of the "raw" et_pal_ methods in order to correctly dispatch through the function table. In the following PR, I update ET callers to do this. Differential Revision: D74121895
GregoryComer
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lucylq and
swolchok
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/10675
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Summary:
This is part 1 of the implementation of the PAL changes described in #10432. This PR introduces a struct (
pal_table) to hold function pointers to the PAL function implementations. There is a singleton instance of this struct, which is initialized with the weak/strong et_pal_ functions - maintaining backwards compatibility with the existing override mechanism.I've then added wrapper functions for the PAL into the executorch::runtime namespace which dispatch through the function table. It is intended that callers use these functions instead of the "raw" et_pal_ methods in order to correctly dispatch through the function table. In the following PR, I update ET callers to do this.
Differential Revision: D74121895