X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/6917311031ecaa452d591f99d3bba4e3ce1ec050..7238837d023af0b6461e905af99cad1a03931f9a:/lispref/processes.texi

diff --git a/lispref/processes.texi b/lispref/processes.texi
index 098d3936e6..ccf8f76d87 100644
--- a/lispref/processes.texi
+++ b/lispref/processes.texi
@@ -676,8 +676,8 @@ instead of a terminal (see @code{process-connection-type} in
 @ref{Asynchronous Processes}).
 @end defun
 
-@anchor{Coding systems for a subprocess}
 @defun process-coding-system process
+@anchor{Coding systems for a subprocess}
 This function returns a cons cell describing the coding systems in use
 for decoding output from @var{process} and for encoding input to
 @var{process} (@pxref{Coding Systems}).  The value has this form:
@@ -929,11 +929,21 @@ process and only then specify its buffer or filter function; no output
 can arrive before you finish, if the code in between does not call any
 primitive that waits.
 
+@defvar process-adaptive-read-buffering
+On some systems, when Emacs reads the output from a subprocess, the
+output data is read in very small blocks, potentially resulting in
+very poor performance.  This behaviour can be remedied to some extent
+by setting the variable @var{process-adaptive-read-buffering} to a
+non-nil value (the default), as it will automatically delay reading
+from such processes, thus allowing them to produce more output before
+Emacs tries to read it.
+@end defvar
+
   It is impossible to separate the standard output and standard error
 streams of the subprocess, because Emacs normally spawns the subprocess
 inside a pseudo-TTY, and a pseudo-TTY has only one output channel.  If
 you want to keep the output to those streams separate, you should
-redirect one of them to a file--for example, by using an appropriate
+redirect one of them to a file---for example, by using an appropriate
 shell command.
 
 @menu
@@ -1240,7 +1250,7 @@ or terminal input.  Occasionally it is useful in a Lisp program to
 explicitly permit output to arrive at a specific point, or even to wait
 until output arrives from a process.
 
-@defun accept-process-output &optional process seconds millisec
+@defun accept-process-output &optional process seconds millisec just-this-one
 This function allows Emacs to read pending output from processes.  The
 output is inserted in the associated buffers or given to their filter
 functions.  If @var{process} is non-@code{nil} then this function does
@@ -1263,6 +1273,15 @@ Not all operating systems support waiting periods other than multiples
 of a second; on those that do not, you get an error if you specify
 nonzero @var{millisec}.
 
+@c Emacs 21.4 feature
+If @var{process} is a process, and the argument @var{just-this-one} is
+non-nil, only output from that process is handled, suspending output
+from other processes until some output has been received from that
+process or the timeout expires.  If @var{just-this-one} is an integer,
+also inhibit running timers.  This feature is generally not
+recommended, but may be necessary for specific applications, such as
+speech synthesis.
+
 The function @code{accept-process-output} returns non-@code{nil} if it
 did get some output, or @code{nil} if the timeout expired before output
 arrived.
@@ -1664,7 +1683,7 @@ meaning ask the system to allocate an unused port to listen on.
 @end defun
 
 @node Datagrams
-@section Datagrams 
+@section Datagrams
 @cindex datagrams
 
   A datagram connection communicates with individual packets rather
@@ -1896,7 +1915,7 @@ that port.
 @end table
 
 The original argument list, modified with the actual connection
-information, is available via the `process-contact' function.
+information, is available via the @code{process-contact} function.
 @end defun
 
 @defun set-network-process-option process option value
@@ -1905,7 +1924,7 @@ This function sets or modifies a network option for network process
 @var{option} and their corresponding values @var{value}.
 
 The current setting of an option is available via the
-`process-contact' function.
+@code{process-contact} function.
 @end defun
 
 @defun network-interface-list
@@ -1951,7 +1970,7 @@ the port number.
 
 @example
 (featurep 'make-network-process '(@var{keyword} @var{value}))
-@end example 
+@end example
 
 @noindent
 The result of the first form is @code{t} if it works to specify
@@ -1977,7 +1996,7 @@ Non-@code{nil} if the system can select the port for a server.
 
 @example
 (featurep 'make-network-process '@var{keyword})
-@end example 
+@end example
 
 Here are some of the option @var{keyword}s you can test in
 this way.