folly::MemoryMapping

Synopsis

Declared in <folly/system/MemoryMapping.h>

class MemoryMapping;

Name	Description
`LockFlags`	Flags controlling how pages are locked into memory.
`Options`	Map a portion of the file indicated by filename in memory, causing SIGABRT on error.

Name	Description
`AnonymousType`	Selector tag type for the anonymous-mapping constructor.
`LockMode`	Lock the pages in memory? TRY_LOCK = try to lock, log warning if permission denied MUST_LOCK = lock, fail assertion if permission denied.

Name	Description
`MemoryMapping` [constructor]	Constructors
`~MemoryMapping` [destructor]	Destroys the mapping, unmapping the memory.
`operator=`	Assignment operators
`advise`	`advise` overloads
`asRange`	A bitwise cast of the mapped bytes as range of values. Only intended for use with POD or in-place usable types.
`asWritableRange`	A bitwise cast of the mapped bytes as range of mutable values. Only intended for use with POD or in-place usable types.
`data`	Return the memory area where the file was mapped. Deprecated; use range() instead.
`fd`	Returns the file descriptor backing this mapping.
`hintLinearScan`	Hint that these pages will be scanned linearly. madvise(MADV_SEQUENTIAL)
`mlock`	Lock the pages in memory
`mlocked`	Reports whether the mapping is currently locked in memory.
`munlock`	Unlock the pages. If dontneed is true, the kernel is instructed to release these pages (per madvise(MADV_DONTNEED)).
`range`	A range of bytes mapped by this mapping.
`swap`	Swaps the contents of this mapping with another.
`writableRange`	A range of mutable bytes mapped by this mapping.

Name	Description
`writable`	Options to emulate the old WritableMemoryMapping: readable and writable, allow growing the file if mapping past EOF.

Name	Description
`swap`	Swaps the contents of two memory mappings.