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STXXL
1.4.0
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STXXL
1.4.0
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Implementation of memory mapped access file.
Definition at line 32 of file mmap_file.h.
Inheritance diagram for stxxl::mmap_file: Collaboration diagram for stxxl::mmap_file:Public Member Functions | |
| mmap_file (const std::string &filename, int mode, int queue_id=DEFAULT_QUEUE, int allocator_id=NO_ALLOCATOR) | |
| Constructs file object. More... | |
| const char * | io_type () const |
| Identifies the type of I/O implementation. More... | |
| void | serve (const request *req) throw (io_error) |
| Public Member Functions inherited from stxxl::ufs_file_base | |
| ~ufs_file_base () | |
| void | close_remove () |
| close and remove file More... | |
| const char * | io_type () const |
| Identifies the type of I/O implementation. More... | |
| bool | is_device () const |
| return true if file is special device node More... | |
| void | lock () |
| Locks file for reading and writing (acquires a lock in the file system). More... | |
| void | set_size (offset_type newsize) |
| offset_type | size () |
| Returns size of the file. More... | |
| void | unlink () |
| unlink file without closing it. More... | |
| Public Member Functions inherited from stxxl::file | |
| virtual | ~file () |
| void | add_request_ref () |
| virtual request_ptr | aread (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl)=0 |
| Schedules an asynchronous read request to the file. More... | |
| virtual request_ptr | awrite (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl)=0 |
| Schedules an asynchronous write request to the file. More... | |
| void | delete_request_ref () |
| virtual void | discard (offset_type offset, offset_type size) |
| Discard a region of the file (mark it unused). Some specialized file types may need to know freed regions. More... | |
| virtual void | export_files (offset_type offset, offset_type length, std::string prefix) |
| virtual int | get_physical_device_id () const |
| int | get_request_nref () |
| virtual void | set_size (offset_type newsize)=0 |
| Changes the size of the file. More... | |
| Public Member Functions inherited from stxxl::disk_queued_file | |
| disk_queued_file (int queue_id, int allocator_id) | |
| request_ptr | aread (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl) |
| request_ptr | awrite (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl) |
| virtual int | get_allocator_id () const |
| Returns the file's allocator. More... | |
| virtual int | get_queue_id () const |
| Returns the identifier of the file's queue. More... | |
Additional Inherited Members | |
| Public Types inherited from stxxl::file | |
| typedef request::offset_type | offset_type |
| the offset of a request, also the size of the file More... | |
| enum | open_mode { RDONLY = 1, WRONLY = 2, RDWR = 4, CREAT = 8, DIRECT = 16, TRUNC = 32, SYNC = 64, NO_LOCK = 128, REQUIRE_DIRECT = 256 } |
| Definition of acceptable file open modes. More... | |
| typedef request::size_type | size_type |
| the size of a request More... | |
| Static Public Member Functions inherited from stxxl::file | |
| static int | unlink (const char *path) |
| unlink path from filesystem More... | |
| static int | truncate (const char *path, external_size_type length) |
| truncate a path to given length. Use this only if you dont have a fileio-specific object, which provides truncate(). More... | |
| Static Public Attributes inherited from stxxl::file | |
| static const int | DEFAULT_QUEUE = -1 |
| static const int | NO_ALLOCATOR = -1 |
| static const int | NO_QUEUE = -2 |
| Protected Member Functions inherited from stxxl::ufs_file_base | |
| ufs_file_base (const std::string &filename, int mode) | |
| void | _after_open () |
| void | _set_size (offset_type newsize) |
| offset_type | _size () |
| void | close () |
| Protected Member Functions inherited from stxxl::file | |
| file () | |
| Initializes file object. More... | |
| Protected Attributes inherited from stxxl::ufs_file_base | |
| mutex | fd_mutex |
| int | file_des |
| const std::string | filename |
| bool | m_is_device |
| is special device node More... | |
| int | m_mode |
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inline |
Constructs file object.
| filename | path of file |
| mode | open mode, see stxxl::file::open_modes |
| queue_id | disk queue identifier |
| allocator_id | linked disk_allocator |
Definition at line 40 of file mmap_file.h.
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virtual |
Identifies the type of I/O implementation.
Reimplemented from stxxl::file.
Definition at line 72 of file mmap_file.cpp.
Implements stxxl::file.
Definition at line 27 of file mmap_file.cpp.
References bytes, STXXL_THROW_ERRNO, and STXXL_THROW_ERRNO_NE_0.
1.8.5 
