QortalOS Brooklyn for Raspberry Pi 4
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// SPDX-License-Identifier: GPL-2.0 |
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#include <stdint.h> |
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volatile uint64_t x; |
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int main(int argc, char *argv[]) |
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{ |
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uint64_t old, new = argc; |
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(void)argv; |
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do { |
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old = __sync_val_compare_and_swap(&x, 0, 0); |
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} while (!__sync_bool_compare_and_swap(&x, old, new)); |
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return old == new; |
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}
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