JetBrains.Common.MemoryMappedStorage

Intermediate lifetime is required to preserve the order of disposition. In this class serves to lock current storage files until cache storage manager do the cleanup

Performance critical

Size of section memory. Counted in elements

Readable size of section memory. Counted in elements

Size of single element

Flag that determines whether section may grow further or not

Maps the whole page that matches the offset

Requested offset Offset of the beginning of the page Page size

Allocates memory block of exact size at the current end of the section If free space at the current page is less than , block will be allocated at the beginning of the next page If is greater than page size, exception will be thrown

Size of the requested memory block Actual offset of allocated block Pointer to mapped memory

Allocates memory block of maximum size at the current end of the section

Maximum size of requested memory block Size of actually allocated block. Can be less than if end of page was reached Start offset of actually allocated memory block Pointer to mapped memory

Allocates or, if already allocated, maps memory block of maximum size beginning from . If is greater than current section size, it will be expanded and gap will be filled with zeroes.

Start offset of the requested memory block Maximum size of the requested memory block Start offset of actually mapped memory block. Can be greater than because of alignment. Size of actually mapped memory block. Can be less than if requested block crosses page boundary. Pointer to mapped memory

Sets

New value True if new value was greater than previous one

Finalizes section so that no further allocation operations are permitted.

Sets ready size of the section up to the index of the element (including this element)

Index included.

Creates sections header or fails if header already exists

header size in bytes Created header

Creates sections header or fails if header already exists

header size in bytes header data Created header

Loads section header for reading and writing

Loaded header or null if section doesn't contain header

Creates section data description or fails if description already exists

Size of data element in bytes Alignment of every data segment of the section; in bit shifts, Preferred number of pages in the region, 0 if fixed size, Created section data description

Loads section data description for reading and writing section data.

Loaded section data description or null if section doesn't contain data

Position in elements of the first element after last allocated space for writing. Value is changed when called Data before this offset and after can be written Always greather or equal to value

Tries to update free offset Can fail spuriously, even if free offset equlas to expected

Position expected to be found in The value of free offset is requested to be increased for true if successful otherwise false

Commits segments data before readyPosition Changes for enable reading data

Position in elements of the first element after last commited data, Must be greather or equal then current value Must be lower or equal then current value Previous value

Map region into memory for reading and writing

Starting position in elements that should be inside mapped region Maximum size in elements of mapped region but no lower than page size Mapped region for reading and writing

Flushes this mapped region to disk

If true waits until view is flushed to disk

Pointer to the header data, not null It´s a native pointer to a memory mapped header Writing on this pointer when memory mapped storage is opened in reaonly mode cause access violation

Header size in bytes

Loads section header for reading

Loaded header or null if section doesn't contain header

Loads section data description for reading section data.

Loaded section data description or null if section doesn't contain data

Position in elemetns of the first element after last commited data. Data before this position can be read

Maps region into memory for reading

Starting position in elements that should be inside mapped region Maximum size in elements of mapped region but no lower than page size Mapped region for reading

Element size in bytes, grether than zero

Alignment of every data segment of the section; in bit shifts

Preferred number of pages in the region

Native pointer to the native memory address of the mapped memory region. Writing on this pointer when memory mapped storage is opened in reaonly mode cause access violation

StartPosition in elements of mapped region. First element in the view has a position in section data

Size in elements of the mapped region

Sections collection. Doesn't inherit IEnumerable bacause returns enumerator with custom behaviour

Loads sections.

Sections enumerator

Sections list enumerator It is not inherited from IEnumerator because: can return elements after the last element if appeared returns elements that must be disposed

Valid only when returns true.

Enumerate next section. Can be used to poll new sections appearance. Returns false if no more section available now and can be called after returning false and can returns new section if appeared in this case

Create interface for the current section. Can be called only once!!!

Creates new section and appends it to the end of the sections list

section type section version created section

Loads sections.

Sections enumerator

Sections list enumerator It is not inherited from IEnumerator because: can return elements after was positioned after the last element if that appeared returns elements that have to be disposed

Valid only when returns true.

Create interface for the current section. Can be called only once!!!

Creates and initializes empty memory mapped storage

Path to the file where the storage located Storage begin position in bytes storage

Creates and initializes empty memory mapped storage

IMPORTANT:
* MemoryMappedStorage is not thread-safe when shares the one or uses the duplicated file handle;
* MemoryMappedStorage doesn't take ownership over given handle, the caller is responsible to dispose passed handle. Handle to the file where the storage located Storage begin position in bytes storage

Opens existing storage only for reading

Path to the file where the storage located Storage begin position in bytes readonly storage

Opens existing storage only for reading

Opens existing storage for reading and writing

Path to the file where the storage located Storage begin position in bytes storage

Opens existing storage for reading and writing