eventfd.c

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// SPDX-License-Identifier: GPL-2.0
#ifndef EFD_SEMAPHORE
#define EFD_SEMAPHORE       1
#endif

#ifndef EFD_NONBLOCK
#define EFD_NONBLOCK        00004000
#endif

#ifndef EFD_CLOEXEC
#define EFD_CLOEXEC     02000000
#endif

static size_t syscall_arg__scnprintf_eventfd_flags(char *bf, size_t size, struct syscall_arg *arg)
{
    int printed = 0, flags = arg->val;

    if (flags == 0)
        return scnprintf(bf, size, "NONE");
#define P_FLAG(n) \
    if (flags & EFD_##n) { \
        printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
        flags &= ~EFD_##n; \
    }

    P_FLAG(SEMAPHORE);
    P_FLAG(CLOEXEC);
    P_FLAG(NONBLOCK);
#undef P_FLAG

    if (flags)
        printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);

    return printed;
}

#define SCA_EFD_FLAGS syscall_arg__scnprintf_eventfd_flags