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	(DARWIN): Defined.
* process.c (init_process): Default process-connection-type to
	nil on darwin 6 or less, t if it is 7 or higher.  This way the
	broken pty behavior is still allowed on darwin 6 for interactive
	processes for people that know what they are doing.

(SIGNAL_THREAD_CHECK): New macro.

* keyboard.c (input_available_signal): Move thread checking code
to macro SIGNAL_THREAD_CHECK and call that macro.
(interrupt_signal): Call SIGNAL_THREAD_CHECK.

* alloc.c (uninterrupt_malloc): Move main_thread to emacs.c.

* emacs.c: Define main_thread.
(main): Initialize main_thread.
(handle_USR1_signal, handle_USR2_signal, fatal_error_signal)
(memory_warning_signal): Call SIGNAL_THREAD_CHECK.

* floatfns.c (float_error): Call SIGNAL_THREAD_CHECK.

* dispnew.c (window_change_signal): Call SIGNAL_THREAD_CHECK.

* sysdep.c (select_alarm): Call SIGNAL_THREAD_CHECK.

* process.c (send_process_trap, sigchld_handler): Call
SIGNAL_THREAD_CHECK.

* data.c (arith_error): Call SIGNAL_THREAD_CHECK.

* atimer.c (alarm_signal_handler): Call SIGNAL_THREAD_CHECK.

connects on BSD.  If connect is interrupted, just close socket and
start over rather than sleeping and retry with same socket.

declare and use them if NON_BLOCKING_CONNECT is defined.
(IF_NON_BLOCKING_CONNECT): New helper macro.
(wait_reading_process_output): Only declare and use local vars
Connecting and check_connect when NON_BLOCKING_CONNECT is defined.
(init_process): Initialize them if NON_BLOCKING_CONNECT defined.

If there's no char for this signal, drop through and use system calls.

wait_reading_process_input.  All uses changed.
(wait_reading_process_output_1): Rename from
wait_reading_process_input_1.  All uses changed.

Add wait_for_cell, wait_proc, and just_wait_proc args
to avoid overloading `read_kbd' and `do_display' args.
Change read_kbd arg to int.  All callers changed.

forward to wait_reading_process_input via DO_DISPLAY arg.
(wait_reading_process_input): If DO_DISPLAY < 0 for a process
object, only process output from that process; also inhibit
running timers if DO_DISPLAY==-2.

_POSIX_VDISABLE instead of CVDISABLE when available.

Do nothing if the character is CVDISABLE.

Don't trigger adaptive read buffering on errors.

with alarm based polling.
mac.c (sys_select): Redo sys_select to use alarm-based
polling instead of 1 sec timeouts (like solaris).
macterm.c (x_make_frame_visible): Comment in polling on
frame creation.
keyboard.c: Undef SIGIO on Carbon
atimer.c (alarm_signal_handler): Call alarm handlers after
scheduling.
eval.c (Feval): Remove quit_char test
process.c (wait_reading_process_input): Remove clearing
stdin for select call on process input

Instead, call status_notify also for network process.
(status_message): Use process instead of status as arg.
Give messages "deleted" or "connection broken by remote peer" for
an exited network process.
(status_notify): Change call to status_message.
(read_process_output): Increase readmax to 4096.  Do not increase
buffer size for datagram channels (default is now large enough).

before actually accepting connection in case it has already been
accepted due to recursion.

Make Available and Connecting non-static.  Save and restore value
of waiting_for_user_input_p.

this could cause a crash in allocate_string and compact_small_strings.

(Fset_process_query_on_exit_flag, Vprocess_adaptive_read_buffering):
Fix spelling of Emacs on docstring.
(Fset_process_coding_system, Fprocess_coding_system)
(Fset_process_filter_multibyte, Fprocess_filter_multibyte_p):
Make argument names match their use in docstring.
(Fprocess_id, Fprocess_query_on_exit_flag, Finterrupt_process):
Fix docstring.

buffering if waiting for a specific process.

if terminated by a signal.  synch_process_death setting removed.

buffering if we read less than 256 bytes at a time.

(READ_OUTPUT_DELAY_INCREMENT, READ_OUTPUT_DELAY_MAX)
(READ_OUTPUT_DELAY_MAX_MAX): New constants.
(process_output_delay_count, process_output_skip): New vars.
(Vprocess_adaptive_read_buffering): New variable.
(make_process): Initialize adaptive read buffering members.
(Fstart_process): Set adaptive_read_buffering member.
(deactivate_process): Cleanup adaptive read buffering.
(wait_reading_process_input): Temporarily omit delayed
subprocesses from the set of file descriptors to read from;
adjust the select timeout if we skipped any subprocesses.
(read_process_output): Increase adaptive read buffering delay if
we read less than a full buffer; reduce delay when we read a
full buffer.
(send_process): Simplify using local Lisp_Process var.
Reset adaptive read buffering delay after write.
(init_process): Initialize process_output_delay_count and
process_output_skip.
(syms_of_process): DEFVAR_LISP Vprocess_adaptive_read_buffering.

(Fset_network_process_option): Update process contact list when
setting option succeeds.
(Fmake_network_process): Doc fix.

HAVE_STRUCT_IFREQ... macros.

(Fnetwork_interface_list): Doc fix.
(read_process_output, read_process_output): Delete unused var.

Require HAVE_NET_IF_H and HAVE_SYS_IOCTL_H to include these fns.
(Fnetwork_interface_info): Check that ifreq struct has required
fields before accessing them; this requires that those fields are
defined as macros, which may be too restrictive on some platforms,
but it is better than failing on other platforms.
(syms_of_process): Only defsubr above fns when included.

for network process.
(socket_options): Add `:' prefix to option names.  Add optbit field.
(set_socket_option): Remove no_error arg and special handling of s < 0.
Return 1<<optbit for known option, 0 for unknown.
Do not interpret 0 as false for boolean option (only nil).
Pass failed option and value to report_file_error.
(Fset_network_process_options): Replaced by Fset_network_process_option.
(Fset_network_process_option): New function to set just one option.
(Fmake_network_process): Allow :coding arg to be a cons.
Allow :server arg to be an integer specifying backlog size.
Remove :options arg, and allow options to be specified directly
as :KEY, VALUE pairs.  Parse these options before binding socket.
As before, :reuseaddr t is default for a server process, but this
can now be disabled by specifying :reuseaddr nil.
(Fnetwork_interface_info): Rename from Fget_network_interface_info.
(init_process): Availability of network options is now checked with
simpler syntax (featurep 'make-network-process :OPTION); use loop to
setup features.
(syms_of_process): Fix defsubr's for the replaced functions.

(Fnetwork_interface_list, Fget_network_interface_info): New defuns.
(syms_of_process): Defsubr them.