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extmod/vfs: Introduce a C-level VFS protocol, with fast import_stat.

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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.
This commit is contained in:
Damien George
2018-06-06 14:24:23 +10:00
parent fadd6bbe43
commit c117effddd
6 changed files with 24 additions and 19 deletions
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3
extmod/vfs_posix.h
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@@ -29,13 +29,10 @@
#include "py/lexer.h"
#include "py/obj.h"
struct _mp_obj_vfs_posix_t;
extern const mp_obj_type_t mp_type_vfs_posix;
extern const mp_obj_type_t mp_type_vfs_posix_fileio;
extern const mp_obj_type_t mp_type_vfs_posix_textio;
mp_import_stat_t mp_vfs_posix_import_stat(struct _mp_obj_vfs_posix_t *self, const char *path_in);
mp_obj_t mp_vfs_posix_file_open(const mp_obj_type_t *type, mp_obj_t file_in, mp_obj_t mode_in);
#endif // MICROPY_INCLUDED_EXTMOD_VFS_POSIX_H