static void barrier()

in demo_example/asio/asio/detail/gcc_arm_fenced_block.hpp [54:81]

• 26 lines of code
• 14 McCabe index (conditional complexity)

  static void barrier()
  {
#if defined(__ARM_ARCH_4__) \
    || defined(__ARM_ARCH_4T__) \
    || defined(__ARM_ARCH_5__) \
    || defined(__ARM_ARCH_5E__) \
    || defined(__ARM_ARCH_5T__) \
    || defined(__ARM_ARCH_5TE__) \
    || defined(__ARM_ARCH_5TEJ__) \
    || defined(__ARM_ARCH_6__) \
    || defined(__ARM_ARCH_6J__) \
    || defined(__ARM_ARCH_6K__) \
    || defined(__ARM_ARCH_6Z__) \
    || defined(__ARM_ARCH_6ZK__) \
    || defined(__ARM_ARCH_6T2__)
# if defined(__thumb__)
    // This is just a placeholder and almost certainly not sufficient.
    __asm__ __volatile__ ("" : : : "memory");
# else // defined(__thumb__)
    int a = 0, b = 0;
    __asm__ __volatile__ ("swp %0, %1, [%2]"
        : "=&r"(a) : "r"(1), "r"(&b) : "memory", "cc");
# endif // defined(__thumb__)
#else
    // ARMv7 and later.
    __asm__ __volatile__ ("dmb" : : : "memory");
#endif
  }