trace/beauty/eventfd.c

0001 // SPDX-License-Identifier: LGPL-2.1
0002 #ifndef EFD_SEMAPHORE
0003 #define EFD_SEMAPHORE       1
0004 #endif
0005
0006 #ifndef EFD_NONBLOCK
0007 #define EFD_NONBLOCK        00004000
0008 #endif
0009
0010 #ifndef EFD_CLOEXEC
0011 #define EFD_CLOEXEC     02000000
0012 #endif
0013
0014 static size_t syscall_arg__scnprintf_eventfd_flags(char *bf, size_t size, struct syscall_arg *arg)
0015 {
0016     bool show_prefix = arg->show_string_prefix;
0017     const char *prefix = "EFD_";
0018     int printed = 0, flags = arg->val;
0019
0020     if (flags == 0)
0021         return scnprintf(bf, size, "NONE");
0022 #define P_FLAG(n) \
0023     if (flags & EFD_##n) { \
0024         printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
0025         flags &= ~EFD_##n; \
0026     }
0027
0028     P_FLAG(SEMAPHORE);
0029     P_FLAG(CLOEXEC);
0030     P_FLAG(NONBLOCK);
0031 #undef P_FLAG
0032
0033     if (flags)
0034         printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
0035
0036     return printed;
0037 }
0038
0039 #define SCA_EFD_FLAGS syscall_arg__scnprintf_eventfd_flags