Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer
Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority
:mod:`pipes` --- Interface to shell pipelines
=============================================
.. module:: pipes
:platform: Unix
:synopsis: A Python interface to Unix shell pipelines.
.. sectionauthor:: Moshe Zadka <moshez@zadka.site.co.il>
The :mod:`pipes` module defines a class to abstract the concept of a *pipeline*
--- a sequence of converters from one file to another.
Because the module uses :program:`/bin/sh` command lines, a POSIX or compatible
shell for :func:`os.system` and :func:`os.popen` is required.
The :mod:`pipes` module defines the following class:
.. class:: Template()
An abstraction of a pipeline.
Example::
>>> import pipes
>>> t=pipes.Template()
>>> t.append('tr a-z A-Z', '--')
>>> f=t.open('/tmp/1', 'w')
>>> f.write('hello world')
>>> f.close()
>>> open('/tmp/1').read()
'HELLO WORLD'
.. _template-objects:
Template Objects
----------------
Template objects following methods:
.. method:: Template.reset()
Restore a pipeline template to its initial state.
.. method:: Template.clone()
Return a new, equivalent, pipeline template.
.. method:: Template.debug(flag)
If *flag* is true, turn debugging on. Otherwise, turn debugging off. When
debugging is on, commands to be executed are printed, and the shell is given
``set -x`` command to be more verbose.
.. method:: Template.append(cmd, kind)
Append a new action at the end. The *cmd* variable must be a valid bourne shell
command. The *kind* variable consists of two letters.
The first letter can be either of ``'-'`` (which means the command reads its
standard input), ``'f'`` (which means the commands reads a given file on the
command line) or ``'.'`` (which means the commands reads no input, and hence
must be first.)
Similarly, the second letter can be either of ``'-'`` (which means the command
writes to standard output), ``'f'`` (which means the command writes a file on
the command line) or ``'.'`` (which means the command does not write anything,
and hence must be last.)
.. method:: Template.prepend(cmd, kind)
Add a new action at the beginning. See :meth:`append` for explanations of the
arguments.
.. method:: Template.open(file, mode)
Return a file-like object, open to *file*, but read from or written to by the
pipeline. Note that only one of ``'r'``, ``'w'`` may be given.
.. method:: Template.copy(infile, outfile)
Copy *infile* to *outfile* through the pipe.