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extmod/vfs_posix_file: Lock GIL when writing and allow stdio flush.

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Also support MP_STREAM_GET_FILENO ioctl.  The stdio flush change was done
previously for the unix port in 3e0b46b9af8b7a6934b7ac68671ef8f55be2b848.
These changes make this POSIX file implementation equivalent to the unix
file implementation.
This commit is contained in:
Damien George 2020-03-18 17:43:00 +11:00
parent ad9a0ec8ab
commit 68b1bc2042
1 changed files with 11 additions and 0 deletions
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11
extmod/vfs_posix_file.c
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@ -157,7 +157,9 @@ STATIC mp_uint_t vfs_posix_file_write(mp_obj_t o_in, const void *buf, mp_uint_t
return size;
}
#endif
MP_THREAD_GIL_EXIT();
mp_int_t r = write(o->fd, buf, size);
MP_THREAD_GIL_ENTER();
while (r == -1 && errno == EINTR) {
if (MP_STATE_VM(mp_pending_exception) != MP_OBJ_NULL) {
mp_obj_t obj = MP_STATE_VM(mp_pending_exception);
@ -184,6 +186,13 @@ STATIC mp_uint_t vfs_posix_file_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_
int ret = fsync(o->fd);
MP_THREAD_GIL_ENTER();
if (ret == -1) {
if (errno == EINVAL
&& (o->fd == STDIN_FILENO || o->fd == STDOUT_FILENO || o->fd == STDERR_FILENO)) {
// fsync(stdin/stdout/stderr) may fail with EINVAL, but don't propagate that
// error out. Because data is not buffered by us, and stdin/out/err.flush()
// should just be a no-op.
return 0;
}
*errcode = errno;
return MP_STREAM_ERROR;
}
@ -208,6 +217,8 @@ STATIC mp_uint_t vfs_posix_file_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_
o->fd = -1;
#endif
return 0;
case MP_STREAM_GET_FILENO:
return o->fd;
default:
*errcode = EINVAL;
return MP_STREAM_ERROR;