Function __map_region

include/exec/linux/io_uring_context.hpp:101–107

    }

    inline auto __map_region(int __fd, ::off_t __offset, std::size_t __size) -> memory_mapped_region
    {
      void* __ptr =
        ::mmap(nullptr, __size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, __fd, __offset);
      __throw_error_code_if(__ptr == MAP_FAILED, errno);
      return memory_mapped_region{__ptr, __size};
    }

    // This base class maps the Linux kernel's io_uring data structures into the process.
    struct __context_base : STDEXEC::__immovable