py/stream: Adjust mp_stream_posix_XXX to take void*, not mp_obj_t.

These POSIX wrappers are assumed to be passed a concrete stream object so
it is more efficient (eg on nan-boxing builds) to pass in the pointer
rather than mp_obj_t, because then the users of these functions only need
to store a void* (and mp_obj_t may be wider than a pointer).  And things
would be further improved if the stream protocol functions eventually took
a pointer as their first argument (instead of an mp_obj_t).

This patch is a step to getting ussl/axtls compiling on nan-boxing builds.

See issue #3085.

1 files changed, 5 insertions, 4 deletions

diff --git a/py/stream.h b/py/stream.h
index be34176db..f4c6d30bd 100644
--- a/py/stream.h
+++ b/py/stream.h
@@ -116,10 +116,11 @@ void mp_stream_write_adaptor(void *self, const char *buf, size_t len);
 
 #if MICROPY_STREAMS_POSIX_API
 // Functions with POSIX-compatible signatures
-ssize_t mp_stream_posix_write(mp_obj_t stream, const void *buf, size_t len);
-ssize_t mp_stream_posix_read(mp_obj_t stream, void *buf, size_t len);
-off_t mp_stream_posix_lseek(mp_obj_t stream, off_t offset, int whence);
-int mp_stream_posix_fsync(mp_obj_t stream);
+// "stream" is assumed to be a pointer to a concrete object with the stream protocol
+ssize_t mp_stream_posix_write(void *stream, const void *buf, size_t len);
+ssize_t mp_stream_posix_read(void *stream, void *buf, size_t len);
+off_t mp_stream_posix_lseek(void *stream, off_t offset, int whence);
+int mp_stream_posix_fsync(void *stream);
 #endif
 
 #if MICROPY_STREAMS_NON_BLOCK