Release 4.11 tools/build/feature/test-sync-compare-and-swap.c

#include <stdint.h>


volatile uint64_t x;



int main(int argc, char *argv[])
{
	uint64_t old, new = argc;

	argv = argv;
	do {
		old = __sync_val_compare_and_swap(&x, 0, 0);
	} while (!__sync_bool_compare_and_swap(&x, old, new));
	return old == new;
}
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Directory: tools/build/feature

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