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/* COVERAGE: membarrier */
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/syscall.h>
// If SYS_membarrier is defined, let's assume that linux/membarrier.h
// exists.
#ifdef SYS_membarrier
#include <linux/membarrier.h>
static inline int membarrier(int cmd, int flags)
{
return syscall(SYS_membarrier, cmd, flags);
}
#endif
int main()
{
#ifdef SYS_membarrier
membarrier(MEMBARRIER_CMD_QUERY, 0);
//staptest// membarrier (MEMBARRIER_CMD_QUERY, 0) = NNNN
// Note that this functional test doesn't really do anything.
membarrier(MEMBARRIER_CMD_SHARED, 0);
//staptest// membarrier (MEMBARRIER_CMD_SHARED, 0) = 0
membarrier(-1, 0);
//staptest// membarrier (0xffffffff, 0) = NNNN
membarrier(MEMBARRIER_CMD_QUERY, -1);
//staptest// membarrier (MEMBARRIER_CMD_QUERY, -1) = NNNN
#endif
return 0;
}
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