RBASIC_CLASS(obj) macro which returns a class of `obj'.
  This change is a part of RGENGC branch [ruby-trunk - Feature #8339].
* object.c: add new function rb_obj_reveal().
  This function reveal interal (hidden) object by rb_obj_hide().
  Note that do not change class before and after hiding.
  Only permitted example is:
  klass = RBASIC_CLASS(obj);
  rb_obj_hide(obj);
  ....
  rb_obj_reveal(obj, klass);
  TODO: API design. rb_obj_reveal() should be replaced with others.
  TODO: modify constified variables using cast may be harmful for
  compiler's analysis and optimizaton.
  Any idea to prohibt inserting RBasic::klass directly?
  If rename RBasic::klass and force to use RBASIC_CLASS(obj),
  then all codes such as `RBASIC(obj)->klass' will be
  compilation error. Is it acceptable? (We have similar
  experience at Ruby 1.9,
  for example "RARRAY(ary)->ptr" to "RARRAY_PTR(ary)".
* internal.h: add some macros.
* RBASIC_CLEAR_CLASS(obj) clear RBasic::klass to make it internal
  object.
* RBASIC_SET_CLASS(obj, cls) set RBasic::klass.
* RBASIC_SET_CLASS_RAW(obj, cls) same as RBASIC_SET_CLASS
  without write barrier (planned).
* RCLASS_SET_SUPER(a, b) set super class of a.
* array.c, class.c, compile.c, encoding.c, enum.c, error.c, eval.c,
  file.c, gc.c, hash.c, io.c, iseq.c, marshal.c, object.c,
  parse.y, proc.c, process.c, random.c, ruby.c, sprintf.c,
  string.c, thread.c, transcode.c, vm.c, vm_eval.c, win32/file.c:
  Use above macros and functions to access RBasic::klass.
* ext/coverage/coverage.c, ext/readline/readline.c,
  ext/socket/ancdata.c, ext/socket/init.c,
* ext/zlib/zlib.c: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40691 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  [ruby-core:54777] [Feature #8368]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40639 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

subclasses that include WaitReadable or WaitWritable rather than
extending them into the exception object each time.

* error.c: Capture EGAIN, EWOULDBLOCK, EINPROGRESS exceptions and
  export them for use in WaitReadable/Writable exceptions.
* io.c: Create versions of EAGAIN, EWOULDBLOCK, EINPROGRESS that
  include WaitReadable and WaitWritable. Add rb_readwrite_sys_fail
  for nonblocking failures using those exceptions. Use that
  function in io_getpartial and io_write_nonblock instead of
  rb_mod_sys_fail
* ext/openssl/ossl_ssl.c: Add new SSLError subclasses that include
  WaitReadable and WaitWritable. Use those classes for
  write_would_block and read_would_block instead of rb_mod_sys_fail.
* ext/socket/ancdata.c: Use rb_readwrite_sys_fail instead of
  rb_mod_sys_fail in bsock_sendmsg_internal and
  bsock_recvmsg_internal.
* ext/socket/init.c: Use rb_readwrite_sys_fail instead of
  rb_mod_sys_fail in rsock_s_recvfrom_nonblock and
  rsock_s_connect_nonblock.
* ext/socket/socket.c: Use rb_readwrite_sys_fail instead of
  rb_mod_sys_fail in sock_connect_nonblock.
* include/ruby/ruby.h: Export rb_readwrite_sys_fail for use instead
  of rb_mod_sys_fail. Introduce new constants RB_IO_WAIT_READABLE and
  RB_IO_WAIT_WRITABLE for first arg to rb_readwrite_sys_fail.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40195 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  [ruby-core:45617] [Feature #6583] proposed Eric Hodel.

* ext/socket/rubysocket.h (rsock_sys_fail_host_port): Declared.
  (rsock_sys_fail_path): Ditto.
  (rsock_sys_fail_sockaddr): Ditto.

* ext/socket/udpsocket.c (udp_connect): Use rsock_sys_fail_host_port.
  (udp_bind): Ditto.
  (udp_send): Ditto.

* ext/socket/init.c (rsock_init_sock): Specify a string for rb_sys_fail
  argument.
  (make_fd_nonblock): Ditto.
  (rsock_s_accept): Ditto.

* ext/socket/ipsocket.c (init_inetsock_internal): Use
  rsock_sys_fail_host_port.

* ext/socket/socket.c (rsock_sys_fail_host_port): Defined.
  (rsock_sys_fail_path): Ditto.
  (rsock_sys_fail_sockaddr): Ditto.
  (setup_domain_and_type): Use rsock_sys_fail_sockaddr.
  (sock_connect_nonblock): Ditto.
  (sock_bind): Ditto.
  (sock_gethostname): Specify a string for rb_sys_fail argument.
  (socket_s_ip_address_list): Ditto.

* ext/socket/basicsocket.c (bsock_shutdown): Specify a string for
  rb_sys_fail argument.
  (bsock_setsockopt): Use rsock_sys_fail_path.
  (bsock_getsockopt): Ditto.
  (bsock_getpeereid): Refine the argument for rb_sys_fail.

* ext/socket/unixsocket.c (rsock_init_unixsock): Use
  rsock_sys_fail_path.
  (unix_path): Ditto.
  (unix_send_io): Ditto.
  (unix_recv_io): Ditto.
  (unix_addr): Ditto.
  (unix_peeraddr): Ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40149 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  Debian GNU/kFreeBSD.  Consider HAVE_ACCEPT4 is defined
  but SOCK_CLOEXEC is not defined.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40136 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  sockaddr_storage for less casts.

* ext/socket/rubysocket.h (union_sockaddr): defined.

* ext/socket/socket.c (sock_accept): use union_sockaddr.
  (sock_accept_nonblock): ditto.
  (sock_sysaccept): ditto.
  (sock_s_getnameinfo): ditto.

* ext/socket/basicsocket.c (bsock_getsockname): ditto.
  (bsock_getpeername): ditto.
  (bsock_local_address): ditto.
  (bsock_remote_address): ditto.

* ext/socket/ancdata.c (bsock_recvmsg_internal): ditto.

* ext/socket/init.c (recvfrom_arg): ditto.
  (recvfrom_blocking): ditto.
  (rsock_s_recvfrom): ditto.
  (rsock_s_recvfrom_nonblock): ditto.
  (rsock_getfamily): ditto.

* ext/socket/raddrinfo.c (rb_addrinfo_t): ditto.
  (ai_get_afamily): ditto.
  (inspect_sockaddr): ditto.
  (addrinfo_mdump): ditto.
  (addrinfo_mload): ditto.
  (addrinfo_getnameinfo): ditto.
  (addrinfo_ip_port): ditto.
  (extract_in_addr): ditto.
  (addrinfo_ipv6_to_ipv4): ditto.
  (addrinfo_unix_path): ditto.

* ext/socket/tcpserver.c (tcp_accept): ditto.
  (tcp_accept_nonblock): ditto.
  (tcp_sysaccept): ditto.

* ext/socket/ipsocket.c (ip_addr): ditto.
  (ip_peeraddr): ditto.
  (ip_s_getaddress): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39477 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  socket address returned from recvmsg().

* ext/socket/init.c (recvfrom_blocking): ignore truncated part of
  socket address returned from recvfrom().
  (rsock_s_recvfrom_nonblock): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39278 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  socket address. 

* ext/socket/rubysocket.h (rsock_make_ipaddr): add an argument for
  socket address length.
  (rsock_ipaddr): ditto.

* ext/socket/ipsocket.c (ip_addr): pass length to rsock_ipaddr.
  (ip_peeraddr): ditto.
  (ip_s_getaddress): pass length to rsock_make_ipaddr.

* ext/socket/socket.c (make_addrinfo): pass length to rsock_ipaddr.
  (sock_s_getnameinfo): pass actual address length to rb_getnameinfo.
  (sock_s_unpack_sockaddr_in): pass length to rsock_make_ipaddr.
  
* ext/socket/init.c (rsock_s_recvfrom): pass length to rsock_ipaddr.
  (rsock_s_recvfrom_nonblock): ditto.

* ext/socket/tcpsocket.c (tcp_sockaddr): pass length to
  rsock_make_ipaddr.

* ext/socket/raddrinfo.c (make_ipaddr0): add an argument for socket
  address length.  pass the length to rb_getnameinfo.
  (rsock_ipaddr): ditto.
  (rsock_make_ipaddr): add an argument for socket address length. 
  pass the length to make_ipaddr0.
  (make_inetaddr): pass length to make_ipaddr0.
  a local variable renamed.
  (host_str): a local variable renamed.
  (port_str): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39239 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* ext/socket/init.c (cloexec_accept): fix declaration-after-statement.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39040 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  part of socket address.
  (bsock_getpeername): ditto.
  (bsock_local_address): ditto.
  (bsock_remote_address): ditto.

* ext/socket/unixsocket.c (unix_path): ditto.
  (unix_addr): ditto.
  (unix_peeraddr): ditto.

* ext/socket/init.c (cloexec_accept): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38993 b2dd03c8-39d4-4d8f-98ff-823fe69b080e