diff options
Diffstat (limited to 'libstore/store.h')
| -rw-r--r-- | libstore/store.h | 65 |
1 files changed, 52 insertions, 13 deletions
diff --git a/libstore/store.h b/libstore/store.h index b3f093ff..4bf928bf 100644 --- a/libstore/store.h +++ b/libstore/store.h @@ -23,6 +23,12 @@ #ifndef __STORE_H__ #define __STORE_H__ +#include <sys/types.h> + +#include <mach.h> +#include <device/device.h> +#include <hurd/hurd_types.h> + struct store { /* If this store was created using store_create, the file from which we got @@ -34,19 +40,20 @@ struct store /* Address ranges in the underlying storage which make up our contiguous address space. In units of BLOCK_SIZE, below. */ - off_t *runs; + off_t *runs; /* Malloced */ unsigned runs_len; /* Handles for the underlying storage. */ - char *name; - mach_port_t port; + char *name; /* Malloced */ + mach_port_t port; /* Send right */ /* The size of a `block' on this storage. */ size_t block_size; - /* The number of blocks in this storage. */ + /* The number of blocks (of size BLOCK_SIZE) in this storage. */ size_t blocks; - size_t size; /* Just BLOCKS * BLOCK_SIZE */ + /* The number of bytes in this storage, including holes. */ + size_t size; /* Log_2 (BLOCK_SIZE) or 0 if not a power of 2. */ int log2_block_size; @@ -59,11 +66,12 @@ struct store }; typedef error_t (*store_write_meth_t)(struct store *store, - off_t addr, char *buf, size_t len, - size_t *amount); + off_t addr, + char *buf, mach_msg_type_number_t len, + mach_msg_type_number_t *amount); typedef error_t (*store_read_meth_t)(struct store *store, - off_t addr, size_t amount, - char **buf, size_t *len); + off_t addr, mach_msg_type_number_t amount, + char **buf, mach_msg_type_number_t *len); struct store_meths { @@ -80,26 +88,41 @@ struct store_meths store_close_source). */ error_t store_create (file_t source, struct store **store); -/* Return a new store in STORE referring to the mach device DEVICE. */ +/* Return a new store in STORE referring to the mach device DEVICE. Consumes + the send right DEVICE. */ error_t store_device_create (device_t device, struct store **store); +/* Like store_device_create, but doesn't query the device for information. */ +error_t _store_device_create (device_t device, + off_t *runs, unsigned runs_len, + size_t block_size, + struct store **store); + /* Return a new store in STORE referring to the file FILE. Unlike store_create, this will always use file i/o, even it would be possible to be more direct. This may work in more cases, for instance if the file has - holes. */ + holes. Consumes the send right FILE. */ error_t store_file_create (file_t file, struct store **store); -error_t store_destroy (struct store *store); +/* Like store_file_create, but doesn't query the file for information. */ +error_t _store_file_create (file_t file, + off_t *runs, unsigned runs_len, + size_t block_size, + struct store **store); + +void store_free (struct store *store); /* If STORE was created using store_create, remove the reference to the source from which it was created. */ -error_t store_close_source (struct store *store); +void store_close_source (struct store *store); error_t store_write (struct store *store, off_t addr, char *buf, size_t len, size_t *amount); error_t store_read (struct store *store, off_t addr, size_t amount, char **buf, size_t *len); +#if 0 + /* Return a memory object paging on STORE. [among other reasons,] this may fail because store contains non-contiguous regions on the underlying object. In such a case you can try calling some of the routines below to @@ -118,4 +141,20 @@ error_t store_map_source (struct store *store, vm_prot_t prot, ..., error_t store_create_pager (struct store *store, vm_prot_t prot, ..., mach_port_t *pager) +#endif + +/* Set STORE's current runs list to (a copy of) RUNS and RUNS_LEN. */ +error_t store_set_runs (struct store *store, off_t *runs, unsigned runs_len); + +/* Sets the name associated with STORE to a copy of NAME. */ +error_t store_set_name (struct store *store, char *name); + +/* Fills in the values of the various fields in STORE that are derivable from + the set of runs & the block size. */ +void _store_derive (struct store *store); + +/* Allocate a new store structure of class CLASS, with meths METHS. */ +struct store * +_make_store (enum file_storage_class class, struct store_meths *meths); + #endif /* __STORE_H__ */ |