/** c-allocate with memory tracking. */
  #define CU_CALLOC(x, y)         CU_calloc((x), (y), __LINE__, __FILE__)
  /** m-allocate with memory tracking. */
  #define CU_MALLOC(x)            CU_malloc((x), __LINE__, __FILE__)
  /** Free with memory tracking. */
  #define CU_FREE(x)              CU_free((x), __LINE__, __FILE__)
  /** Reallocate with memory tracking. */

	_C_struct___res_state = unix.ResState
	_C_struct_addrinfo    = unix.Addrinfo
	_C_struct_sockaddr    = syscall.RawSockaddr
)

func _C_free(p unsafe.Pointer) { runtime.KeepAlive(p) }

func _C_malloc(n uintptr) unsafe.Pointer {
	if n <= 0 {
		n = 1
	}
	return unsafe.Pointer(&make([]byte, n)[0])
}

func _C_ai_addr(ai *_C_struct_addrinfo) **_C_struct_sockaddr { return &ai.Addr }

            ["Bad", "c", "AB"],
            ["Bad", "cA", "AB"],
            ["cpuid.h", "cross-stdarg.h", "emmintrin.h", "f16cintrin.h", "float.h", "iso646.h", "ISO_Fortran_binding.h", "lwpintrin.h", "lzcntintrin.h", "mm3dnow.h", "mm_malloc.h", "mmintrin.h", "movdirintrin.h", "mwaitxintrin.h", "nmmintrin.h", "omp.h", "openacc.h", "pconfigintrin.h", "stddef.h", "stdfix.h", "stdint-gcc.h", "stdint.h", "stdnoreturn.h", "tbmintrin.h", "tgmath.h", "tmmintrin.h", "unwind.h"],

	_C_uchar           = C.uchar
	_C_int             = C.int
	_C_uint            = C.uint
	_C_socklen_t       = C.socklen_t
	_C_struct_addrinfo = C.struct_addrinfo
	_C_struct_sockaddr = C.struct_sockaddr
)

func _C_malloc(n uintptr) unsafe.Pointer { return C.malloc(C.size_t(n)) }
func _C_free(p unsafe.Pointer)           { C.free(p) }

func _C_ai_addr(ai *_C_struct_addrinfo) **_C_struct_sockaddr { return &ai.ai_addr }

}

func cgoResSearch(hostname string, rtype, class int) ([]dnsmessage.Resource, error) {
	resStateSize := unsafe.Sizeof(_C_struct___res_state{})
	var state *_C_struct___res_state
	if resStateSize > 0 {
		mem := _C_malloc(resStateSize)
		defer _C_free(mem)
		memSlice := unsafe.Slice((*byte)(mem), resStateSize)
		clear(memSlice)
		state = (*_C_struct___res_state)(unsafe.Pointer(&memSlice[0]))
	}

	`free`,
	`memalign`,
	`do_memalign`,
	`(__)?posix_memalign`,
	`pvalloc`,
	`valloc`,
	`realloc`,

	// TC malloc.
	`tcmalloc::.*`,
	`tc_calloc`,
	`tc_cfree`,
	`tc_malloc`,
	`tc_free`,
	`tc_memalign`,
	`tc_posix_memalign`,
	`tc_pvalloc`,
	`tc_valloc`,
	`tc_realloc`,
	`tc_new`,
	`tc_delete`,
	`tc_newarray`,
	`tc_deletearray`,
	`tc_new_nothrow`,