Use uintptr_t for unsigned int that can hold a pointer

[edwardalee]

This PR addresses https://github.com/lf-lang/reactor-c/issues/447 by using an unsigned int data type that can go back and forth from a pointer. To be useful, of course, we will need to point Lingua Franca to this updated reactor-c.

[coderabbitai[bot]]

Walkthrough

The updates involve modifying a debug print statement in pqueue.c to improve the memory address printing format and changing the type definition of pqueue_pri_t from unsigned long long to uintptr_t in pqueue_base.h to standardize memory address handling. These changes help improve code clarity and maintainability without altering any public or exported entity declarations.

Changes

Files	Change Summary
core/utils/pqueue.c	Updated the format specifier for memory address printing in a debug print statement.
include/core/utils/pqueue_base.h	Changed pqueue_pri_t type from unsigned long long to uintptr_t and included <stdint.h>.

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[edwardalee]

The Zephyr failure here seems to indicate that earlier inferred deadlines are not resulting in earlier execution on a 32 bit machine, so maybe #448 is actually a better solution?

[edwardalee]

Closing in favor of #448.

[petervdonovan]

Above I wrote:

I can confirm that using only 32 bits for the priority on 32-bit platforms will not break the reaction queue, which now seems to fit both the tag and deadline into only 32 bits.

After seeing the test failure, I took a second look. For the record, my original assessment was wrong -- based on the implementation of lf_combine_deadline_and_level, it looks like the deadline is in fact represented with 48 bits. Based on the failing test, it looks like this explains the test failure on a 32-bit Zephyr platform.