38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/**
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*/
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/**
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* @file sleep_ms.c
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* @brief Implements OP_SLEEP_MS to suspend execution for a number of milliseconds.
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*
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* Behavior:
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* - Pops an integer value ms from the stack and sleeps for that many milliseconds.
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* - Always pushes Nil after completion to keep stack discipline for statement POPs.
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*
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* Errors:
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* - If the popped value is not an integer, prints an error, frees it, and pushes Nil.
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* - Negative durations are treated as no-op; Nil is still pushed.
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*/
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case OP_SLEEP_MS: {
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Value ms = pop_value(vm);
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if (ms.type != VAL_INT) {
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fprintf(stderr, "Runtime type error: sleep(ms) expects Number (milliseconds)\n");
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free_value(ms);
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/* push Nil so caller-side POP is safe */
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push_value(vm, make_nil());
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break;
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}
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long t = (long)ms.i;
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if (t > 0) fun_sleep_ms(t);
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free_value(ms);
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/* push Nil so statement POP does not underflow */
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push_value(vm, make_nil());
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break;
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}
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