Commit Graph

9 Commits

Author SHA1 Message Date
David Lechner 9418611c8a unix: Implement PEP 475 to retry syscalls failing with EINTR.
https://www.python.org/dev/peps/pep-0475/

This implements something similar to PEP 475 on the unix port, and for the
VfsPosix class.

There are a few differences from the CPython implementation:
- Since we call mp_handle_pending() between any ENITR's, additional
  functions could be called if MICROPY_ENABLE_SCHEDULER is enabled, not
  just signal handlers.
- CPython only handles signal on the main thread, so other threads will
  raise InterruptedError instead of retrying.  On MicroPython,
  mp_handle_pending() will currently raise exceptions on any thread.

A new macro MP_HAL_RETRY_SYSCALL is introduced to reduce duplicated code
and ensure that all instances behave the same.  This will also allow other
ports that use POSIX-like system calls (and use, eg, VfsPosix) to provide
their own implementation if needed.
2020-03-27 14:40:46 +11:00
Damien George 69661f3343 all: Reformat C and Python source code with tools/codeformat.py.
This is run with uncrustify 0.70.1, and black 19.10b0.
2020-02-28 10:33:03 +11:00
David Lechner 35f66d38b8 extmod/vfs_posix: Release GIL during system calls.
This releases the GIL during syscalls that could block.
2020-01-26 23:26:14 +11:00
Bob Fanger bff2771da1 extmod/vfs_posix: Include stdio.h for declaration of function 'rename'. 2019-09-23 15:14:42 +10:00
Damien George f03601779e extmod: Convert legacy uppercase macro names to lowercase. 2019-02-12 14:54:51 +11:00
Damien George d974ee1c2f extmod/vfs_posix: Use DTTOIF if available to convert type in ilistdir. 2018-07-11 16:07:44 +10:00
Damien George c700ff52a0 extmod/vfs_posix: Support ilistdir with no (or empty) argument. 2018-07-10 12:51:09 +10:00
Damien George c117effddd extmod/vfs: Introduce a C-level VFS protocol, with fast import_stat.
Following other C-level protocols, this VFS protocol is added to help
abstract away implementation details of the underlying VFS in an efficient
way.  As a starting point, the import_stat function is put into this
protocol so that the VFS sub-system does not need to know about every VFS
implementation in order to do an efficient stat for importing files.

In the future it might be worth adding other functions to this protocol.
2018-06-06 14:33:42 +10:00
Damien George 8d82b0edbd extmod: Add VfsPosix filesystem component.
This VFS component allows to mount a host POSIX filesystem within the uPy
VFS sub-system.  All traditional POSIX file access then goes through the
VFS, allowing to sandbox a uPy process to a certain sub-dir of the host
system, as well as mount other filesystem types alongside the host
filesystem.
2018-06-06 14:28:23 +10:00