diff options
Diffstat (limited to 'libio/fileops.c')
| -rw-r--r-- | libio/fileops.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/libio/fileops.c b/libio/fileops.c index 7f833e5094..42bba7aa21 100644 --- a/libio/fileops.c +++ b/libio/fileops.c @@ -440,6 +440,32 @@ _IO_new_file_setbuf (fp, p, len) } INTDEF2(_IO_new_file_setbuf, _IO_file_setbuf) + +_IO_FILE * +_IO_file_setbuf_mmap (fp, p, len) + _IO_FILE *fp; + char *p; + _IO_ssize_t len; +{ + _IO_FILE *result; + + /* Change the function table. */ + _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; + fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; + + /* And perform the normal operation. */ + result = _IO_new_file_setbuf (fp, p, len); + + /* If the call failed, restore to using mmap. */ + if (result == NULL) + { + _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_mmap; + fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; + } + + return result; +} + static int new_do_write __P ((_IO_FILE *, const char *, _IO_size_t)); /* Write TO_DO bytes from DATA to FP. @@ -1293,7 +1319,7 @@ struct _IO_jump_t _IO_file_jumps_mmap = JUMP_INIT(xsgetn, _IO_file_xsgetn_mmap), JUMP_INIT(seekoff, _IO_file_seekoff_mmap), JUMP_INIT(seekpos, _IO_default_seekpos), - JUMP_INIT(setbuf, _IO_new_file_setbuf), + JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), JUMP_INIT(sync, _IO_new_file_sync), JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), JUMP_INIT(read, INTUSE(_IO_file_read)), |