1 #include "file_pager.h" 2 #include "mapped_file_object_server.h" 3 4 /* Initialise a pager for a file with a unique file identifier and shared page 5 mapper for moderating access to loaded pages. */ 6 7 FilePager::FilePager(fileid_t fileid, PageMapper *mapper, flags_t flags, 8 FilePaging *paging) 9 : Pager(mapper, flags), _paging(paging), fileid(fileid) 10 { 11 } 12 13 int FilePager::expected_items() 14 { 15 return MappedFileObject_expected_items; 16 } 17 18 ipc_server_handler_type FilePager::handler() 19 { 20 return (ipc_server_handler_type) handle_MappedFileObject; 21 } 22 23 24 25 /* Close the pager, removing the mapper from the paging registry if 26 appropriate. */ 27 28 void FilePager::close() 29 { 30 _paging->detach_pager(fileid, _mapper); 31 } 32 33 34 35 /* File-specific operations. */ 36 37 long FilePager::flush(offset_t populated_size, offset_t *size) 38 { 39 return Pager::flush(populated_size, size); 40 } 41 42 long FilePager::resize(offset_t *size) 43 { 44 return Pager::resize(size); 45 } 46 47 long FilePager::mmap(offset_t position, offset_t length, offset_t *start_pos, offset_t *end_pos, offset_t *data_end) 48 { 49 /* Set the limits of the paged region. */ 50 51 Pager::mmap(position, length, start_pos, end_pos, data_end); 52 53 /* Obtain the amount of the region that is populated with file data. */ 54 55 *data_end = get_data_size() - _start; 56 57 if (*data_end > _size) 58 *data_end = _size; 59 60 return L4_EOK; 61 } 62 63 64 65 /* Generic pager operations. */ 66 67 long FilePager::map(unsigned long offset, l4_addr_t hot_spot, flags_t flags, l4_snd_fpage_t *region) 68 { 69 return Pager::map(offset, hot_spot, flags, region); 70 } 71 72 // vim: tabstop=4 expandtab shiftwidth=4