llvm::sys::fs Namespace Reference

Namespaces
namespace	detail
Classes
struct	file_type
struct	copy_option
struct	space_info
	space_info - Self explanatory. More...
class	file_status
struct	file_magic
class	mapped_file_region
class	directory_entry
class	directory_iterator
class	recursive_directory_iterator
Enumerations
enum	perms {   no_perms = 0, owner_read = 0400, owner_write = 0200, owner_exe = 0100,   owner_all = owner_read | owner_write | owner_exe, group_read = 040, group_write = 020, group_exe = 010,   group_all = group_read | group_write | group_exe, others_read = 04, others_write = 02, others_exe = 01,   others_all = others_read | others_write | others_exe, all_all = owner_all | group_all | others_all, set_uid_on_exe = 04000, set_gid_on_exe = 02000,   sticky_bit = 01000, perms_mask = all_all | set_uid_on_exe | set_gid_on_exe | sticky_bit, perms_not_known = 0xFFFF, add_perms = 0x1000,   remove_perms = 0x2000, symlink_perms = 0x4000 }
Functions
perms	operator| (perms l, perms r)
perms	operator& (perms l, perms r)
perms &	operator|= (perms &l, perms r)
perms &	operator&= (perms &l, perms r)
perms	operator~ (perms x)
Physical Operators
error_code	make_absolute (SmallVectorImpl< char > &path)
	Make path an absolute path.
error_code	copy_file (const Twine &from, const Twine &to, copy_option copt=copy_option::fail_if_exists)
	Copy the file at from to the path to.
error_code	create_directories (const Twine &path, bool &existed)
	Create all the non-existent directories in path.
error_code	create_directory (const Twine &path, bool &existed)
	Create the directory in path.
error_code	create_hard_link (const Twine &to, const Twine &from)
	Create a hard link from from to to.
error_code	create_symlink (const Twine &to, const Twine &from)
	Create a symbolic link from from to to.
error_code	current_path (SmallVectorImpl< char > &result)
	Get the current path.
error_code	remove (const Twine &path, bool &existed)
	Remove path. Equivalent to POSIX remove().
error_code	remove_all (const Twine &path, uint32_t &num_removed)
	Recursively remove all files below path, then path. Files are removed as if by POSIX remove().
error_code	rename (const Twine &from, const Twine &to)
	Rename from to to. Files are renamed as if by POSIX rename().
error_code	resize_file (const Twine &path, uint64_t size)
	Resize path to size. File is resized as if by POSIX truncate().
Physical Observers
bool	exists (file_status status)
	Does file exist?
error_code	exists (const Twine &path, bool &result)
	Does file exist?
bool	exists (const Twine &path)
	Simpler version of exists for clients that don't need to differentiate between an error and false.
bool	equivalent (file_status A, file_status B)
	Do file_status's represent the same thing?
error_code	equivalent (const Twine &A, const Twine &B, bool &result)
	Do paths represent the same thing?
bool	equivalent (const Twine &A, const Twine &B)
	Simpler version of equivalent for clients that don't need to differentiate between an error and false.
error_code	file_size (const Twine &path, uint64_t &result)
	Get file size.
bool	is_directory (file_status status)
	Does status represent a directory?
error_code	is_directory (const Twine &path, bool &result)
	Is path a directory?
bool	is_regular_file (file_status status)
	Does status represent a regular file?
error_code	is_regular_file (const Twine &path, bool &result)
	Is path a regular file?
bool	is_other (file_status status)
	Does this status represent something that exists but is not a directory, regular file, or symlink?
error_code	is_other (const Twine &path, bool &result)
	Is path something that exists but is not a directory, regular file, or symlink?
bool	is_symlink (file_status status)
	Does status represent a symlink?
error_code	is_symlink (const Twine &path, bool &result)
	Is path a symlink?
error_code	status (const Twine &path, file_status &result)
	Get file status as if by POSIX stat().
error_code	permissions (const Twine &path, perms prms)
	Modifies permission bits on a file.
bool	status_known (file_status s)
	Is status available?
error_code	status_known (const Twine &path, bool &result)
	Is status available?
error_code	unique_file (const Twine &model, int &result_fd, SmallVectorImpl< char > &result_path, bool makeAbsolute=true, unsigned mode=0600)
	Generate a unique path and open it as a file.
error_code	canonicalize (const Twine &path, SmallVectorImpl< char > &result)
	Canonicalize path.
error_code	has_magic (const Twine &path, const Twine &magic, bool &result)
	Are path's first bytes magic?
error_code	get_magic (const Twine &path, uint32_t len, SmallVectorImpl< char > &result)
	Get path's first len bytes.
file_magic	identify_magic (StringRef magic)
	Identify the type of a binary file based on how magical it is.
error_code	identify_magic (const Twine &path, file_magic &result)
	Get and identify path's type based on its content.
error_code	GetSystemLibraryPaths (SmallVectorImpl< std::string > &result)
	Get library paths the system linker uses.
error_code	GetBitcodeLibraryPaths (SmallVectorImpl< std::string > &result)
	Get bitcode library paths the system linker uses + LLVM_LIB_SEARCH_PATH + LLVM_LIBDIR.
error_code	FindLibrary (const Twine &short_name, SmallVectorImpl< char > &result)
	Find a library.
error_code	GetMainExecutable (const char *argv0, void *MainAddr, SmallVectorImpl< char > &result)
	Get absolute path of main executable.
error_code	map_file_pages (const Twine &path, off_t file_offset, size_t size, bool map_writable, void *&result)
	Memory maps the contents of a file.
error_code	unmap_file_pages (void *base, size_t size)
	Memory unmaps the contents of a file.

---

Enumeration Type Documentation

enum llvm::sys::fs::perms

Enumerator:

no_perms
owner_read
owner_write
owner_exe
owner_all
group_read
group_write
group_exe
group_all
others_read
others_write
others_exe
others_all
all_all
set_uid_on_exe
set_gid_on_exe
sticky_bit
perms_mask
perms_not_known
add_perms
remove_perms
symlink_perms

Definition at line 99 of file FileSystem.h.

---

Function Documentation

error_code llvm::sys::fs::canonicalize	(	const Twine &	path,
		SmallVectorImpl< char > &	result
	)

Canonicalize path.

Sets result to the file system's idea of what path is. The result is always absolute and has the same capitalization as the file system.

Parameters:

path	Input path.
result	Set to the canonicalized version of path.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

Referenced by llvm::ImmutableSetRef< ValT, ValInfo >::asImmutableSet().

error_code llvm::sys::fs::copy_file	(	const Twine &	from,
		const Twine &	to,
		copy_option	copt = copy_option::fail_if_exists
	)

Copy the file at from to the path to.

Parameters:

from	The path to copy the file from.
to	The path to copy the file to.
copt	Behavior if to already exists.

Returns:

errc::success if the file has been successfully copied. errc::file_exists if to already exists and copt == copy_option::fail_if_exists. Otherwise a platform specific error_code.

error_code llvm::sys::fs::create_directories	(	const Twine &	path,
		bool &	existed
	)

Create all the non-existent directories in path.

Parameters:

path	Directories to create.
existed	Set to true if path already existed, false otherwise.

Returns:

errc::success if is_directory(path) and existed have been set, otherwise a platform specific error_code.

Definition at line 677 of file PathV2.cpp.

References create_directory(), llvm::StringRef::empty(), exists(), llvm::sys::path::parent_path(), and llvm::Twine::toStringRef().

error_code llvm::sys::fs::create_directory	(	const Twine &	path,
		bool &	existed
	)

Create the directory in path.

Parameters:

path	Directory to create.
existed	Set to true if path already existed, false otherwise.

Returns:

errc::success if is_directory(path) and existed have been set, otherwise a platform specific error_code.

Referenced by create_directories().

error_code llvm::sys::fs::create_hard_link	(	const Twine &	to,
		const Twine &	from
	)

Create a hard link from from to to.

Parameters:

to	The path to hard link to.
from	The path to hard link from. This is created.

Returns:

errc::success if exists(to) && exists(from) && equivalent(to, from) , otherwise a platform specific error_code.

Referenced by llvm::LockFileManager::LockFileManager().

error_code llvm::sys::fs::create_symlink	(	const Twine &	to,
		const Twine &	from
	)

Create a symbolic link from from to to.

Parameters:

to	The path to symbolically link to.
from	The path to symbolically link from. This is created.

Returns:

errc::success if exists(to) && exists(from) && is_symlink(from), otherwise a platform specific error_code.

error_code llvm::sys::fs::current_path

(

SmallVectorImpl< char > &

result

)

Get the current path.

Parameters:

result

Holds the current path on return.

Returns:

errc::success if the current path has been stored in result, otherwise a platform specific error_code.

Referenced by make_absolute().

bool llvm::sys::fs::equivalent	(	file_status	A,
		file_status	B
	)

Do file_status's represent the same thing?

Parameters:

A	Input file_status.
B	Input file_status.

assert(status_known(A) || status_known(B));

Returns:

True if A and B both represent the same file system entity, false otherwise.

Referenced by equivalent().

error_code llvm::sys::fs::equivalent	(	const Twine &	A,
		const Twine &	B,
		bool &	result
	)

Do paths represent the same thing?

assert(status_known(A) || status_known(B));

Parameters:

A	Input path A.
B	Input path B.
result	Set to true if stat(A) and stat(B) have the same device and inode (or equivalent).

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

bool llvm::sys::fs::equivalent	(	const Twine &	A,
		const Twine &	B
	)		[inline]

Simpler version of equivalent for clients that don't need to differentiate between an error and false.

Definition at line 371 of file FileSystem.h.

References equivalent().

bool llvm::sys::fs::exists

(

file_status

status

)

Does file exist?

Parameters:

status

A file_status previously returned from stat.

Returns:

True if the file represented by status exists, false if it does not.

Definition at line 693 of file PathV2.cpp.

References llvm::sys::fs::file_type::file_not_found, status_known(), and llvm::sys::fs::file_status::type().

Referenced by llvm::Archive::addFileBefore(), create_directories(), exists(), is_other(), llvm::ArchiveMember::replaceWith(), and llvm::LockFileManager::waitForUnlock().

error_code llvm::sys::fs::exists	(	const Twine &	path,
		bool &	result
	)

Does file exist?

Parameters:

path	Input path.
result	Set to true if the file represented by status exists, false if it does not. Undefined otherwise.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

bool llvm::sys::fs::exists

(

const Twine &

path

)

[inline]

Simpler version of exists for clients that don't need to differentiate between an error and false.

Definition at line 341 of file FileSystem.h.

References exists().

error_code llvm::sys::fs::file_size	(	const Twine &	path,
		uint64_t &	result
	)

Get file size.

Parameters:

path	Input path.
result	Set to the size of the file in path.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

error_code llvm::sys::fs::FindLibrary	(	const Twine &	short_name,
		SmallVectorImpl< char > &	result
	)

Find a library.

Find the path to a library using its short name. Use the system dependent library paths to locate the library.

c => /usr/lib/libc.so

Parameters:

short_name	Library name one would give to the system linker.
result	Set to the absolute path short_name represents.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

error_code llvm::sys::fs::get_magic	(	const Twine &	path,
		uint32_t	len,
		SmallVectorImpl< char > &	result
	)

Get path's first len bytes.

Parameters:

path	Input path.
len	Number of magic bytes to get.
result	Set to the first len bytes in the file pointed to by path. Or the entire file if file_size(path) < len, in which case result.size() returns the size of the file.

Returns:

errc::success if result has been successfully set, errc::value_too_large if len is larger then the file pointed to by path, otherwise a platform specific error_code.

Referenced by has_magic(), identify_magic(), and llvm::ArchiveMember::replaceWith().

error_code llvm::sys::fs::GetBitcodeLibraryPaths

(

SmallVectorImpl< std::string > &

result

)

Get bitcode library paths the system linker uses + LLVM_LIB_SEARCH_PATH + LLVM_LIBDIR.

Parameters:

result

Set to the list of bitcode library paths.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

error_code llvm::sys::fs::GetMainExecutable	(	const char *	argv0,
		void *	MainAddr,
		SmallVectorImpl< char > &	result
	)

Get absolute path of main executable.

Parameters:

argv0	The program name as it was spelled on the command line.
MainAddr	Address of some symbol in the executable (not in a library).
result	Set to the absolute path of the current executable.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

error_code llvm::sys::fs::GetSystemLibraryPaths

(

SmallVectorImpl< std::string > &

result

)

Get library paths the system linker uses.

Parameters:

result

Set to the list of system library paths.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

error_code llvm::sys::fs::has_magic	(	const Twine &	path,
		const Twine &	magic,
		bool &	result
	)

Are path's first bytes magic?

Parameters:

path	Input path.
magic	Byte sequence to compare path's first len(magic) bytes to.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

Definition at line 752 of file PathV2.cpp.

References get_magic(), Magic, llvm::StringRef::size(), llvm::error_code::success(), llvm::Twine::toStringRef(), and llvm::errc::value_too_large.

file_magic llvm::sys::fs::identify_magic

(

StringRef

magic

)

Identify the type of a binary file based on how magical it is.

Identify the magic in magic.

Definition at line 771 of file PathV2.cpp.

References llvm::sys::fs::file_magic::archive, llvm::sys::fs::file_magic::bitcode, llvm::sys::fs::file_magic::coff_object, llvm::StringRef::data(), llvm::sys::fs::file_magic::elf_core, llvm::sys::fs::file_magic::elf_executable, llvm::sys::fs::file_magic::elf_relocatable, llvm::sys::fs::file_magic::elf_shared_object, llvm::sys::fs::file_magic::macho_bundle, llvm::sys::fs::file_magic::macho_core, llvm::sys::fs::file_magic::macho_dsym_companion, llvm::sys::fs::file_magic::macho_dynamic_linker, llvm::sys::fs::file_magic::macho_dynamically_linked_shared_lib, llvm::sys::fs::file_magic::macho_executable, llvm::sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib, llvm::sys::fs::file_magic::macho_object, llvm::sys::fs::file_magic::macho_preload_executabl, llvm::LibFunc::memcmp, llvm::sys::fs::file_magic::pecoff_executable, llvm::StringRef::size(), and llvm::sys::fs::file_magic::unknown.

Referenced by llvm::Archive::addFileBefore(), identify_magic(), llvm::sys::Path::isArchive(), llvm::sys::Path::isBitcodeFile(), llvm::sys::Path::isDynamicLibrary(), and llvm::sys::Path::isObjectFile().

error_code llvm::sys::fs::identify_magic	(	const Twine &	path,
		file_magic &	result
	)

Get and identify path's type based on its content.

Parameters:

path	Input path.
result	Set to the type of file, or LLVMFileType::Unknown_FileType.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

Definition at line 886 of file PathV2.cpp.

References llvm::SmallVectorTemplateCommon< char >::capacity(), get_magic(), identify_magic(), Magic, llvm::error_code::success(), and llvm::errc::value_too_large.

bool llvm::sys::fs::is_directory

(

file_status

status

)

Does status represent a directory?

Parameters:

status

A file_status previously returned from status.

Returns:

status.type() == file_type::directory_file.

Definition at line 701 of file PathV2.cpp.

References llvm::sys::fs::file_type::directory_file, and llvm::sys::fs::file_status::type().

Referenced by llvm::MemoryBuffer::getFile(), llvm::sys::fs::recursive_directory_iterator::increment(), is_directory(), and is_other().

error_code llvm::sys::fs::is_directory	(	const Twine &	path,
		bool &	result
	)

Is path a directory?

Parameters:

path	Input path.
result	Set to true if path is a directory, false if it is not. Undefined otherwise.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

Definition at line 705 of file PathV2.cpp.

References is_directory(), status(), and llvm::error_code::success().

bool llvm::sys::fs::is_other

(

file_status

status

)

Does this status represent something that exists but is not a directory, regular file, or symlink?

Parameters:

status

A file_status previously returned from status.

Returns:

exists(s) && !is_regular_file(s) && !is_directory(s) && !is_symlink(s)

Definition at line 737 of file PathV2.cpp.

References exists(), is_directory(), is_regular_file(), and is_symlink().

error_code llvm::sys::fs::is_other	(	const Twine &	path,
		bool &	result
	)

Is path something that exists but is not a directory, regular file, or symlink?

Parameters:

path	Input path.
result	Set to true if path exists, but is not a directory, regular file, or a symlink, false if it does not. Undefined otherwise.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

bool llvm::sys::fs::is_regular_file

(

file_status

status

)

Does status represent a regular file?

Parameters:

status

A file_status previously returned from status.

Returns:

status_known(status) && status.type() == file_type::regular_file.

Definition at line 713 of file PathV2.cpp.

References llvm::sys::fs::file_type::regular_file, and llvm::sys::fs::file_status::type().

Referenced by is_other(), and is_regular_file().

error_code llvm::sys::fs::is_regular_file	(	const Twine &	path,
		bool &	result
	)

Is path a regular file?

Parameters:

path	Input path.
result	Set to true if path is a regular file, false if it is not. Undefined otherwise.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

Definition at line 717 of file PathV2.cpp.

References is_regular_file(), status(), and llvm::error_code::success().

bool llvm::sys::fs::is_symlink

(

file_status

status

)

Does status represent a symlink?

Parameters:

status

A file_status previously returned from stat.

Returns:

status.type() == symlink_file.

Definition at line 725 of file PathV2.cpp.

References llvm::sys::fs::file_type::symlink_file, and llvm::sys::fs::file_status::type().

Referenced by is_other(), and is_symlink().

error_code llvm::sys::fs::is_symlink	(	const Twine &	path,
		bool &	result
	)

Is path a symlink?

Parameters:

path	Input path.
result	Set to true if path is a symlink, false if it is not. Undefined otherwise.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

Definition at line 729 of file PathV2.cpp.

References is_symlink(), status(), and llvm::error_code::success().

error_code llvm::sys::fs::make_absolute

(

SmallVectorImpl< char > &

path

)

Make path an absolute path.

Makes path absolute using the current directory if it is not already. An empty path will result in the current directory.

/absolute/path => /absolute/path relative/../path => <current-directory>/relative/../path

Parameters:

path	A path that is modified to be an absolute path.

Returns:

errc::success if path has been made absolute, otherwise a platform specific error_code.

Definition at line 625 of file PathV2.cpp.

References llvm::sys::path::append(), llvm::StringRef::begin(), current_path(), llvm::SmallVectorTemplateCommon< T, typename >::data(), llvm::StringRef::end(), llvm::sys::path::has_root_directory(), llvm::sys::path::has_root_name(), llvm_unreachable, llvm::sys::path::relative_path(), llvm::sys::path::root_directory(), llvm::sys::path::root_name(), llvm::SmallVectorTemplateCommon< T, typename >::size(), llvm::error_code::success(), and llvm::SmallVectorImpl< T >::swap().

error_code llvm::sys::fs::map_file_pages	(	const Twine &	path,
		off_t	file_offset,
		size_t	size,
		bool	map_writable,
		void *&	result
	)

Memory maps the contents of a file.

Parameters:

path	Path to file to map.
file_offset	Byte offset in file where mapping should begin.
size	Byte length of range of the file to map.
map_writable	If true, the file will be mapped in r/w such that changes to the mapped buffer will be flushed back to the file. If false, the file will be mapped read-only and the buffer will be read-only.
result	Set to the start address of the mapped buffer.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

perms llvm::sys::fs::operator&	(	perms	l,
		perms	r
	)		[inline]

Definition at line 129 of file FileSystem.h.

perms& llvm::sys::fs::operator&=	(	perms &	l,
		perms	r
	)		[inline]

Definition at line 137 of file FileSystem.h.

perms llvm::sys::fs::operator|	(	perms	l,
		perms	r
	)		[inline]

Definition at line 125 of file FileSystem.h.

perms& llvm::sys::fs::operator|=	(	perms &	l,
		perms	r
	)		[inline]

Definition at line 133 of file FileSystem.h.

perms llvm::sys::fs::operator~

(

perms

x

)

[inline]

Definition at line 141 of file FileSystem.h.

error_code llvm::sys::fs::permissions	(	const Twine &	path,
		perms	prms
	)

Modifies permission bits on a file.

Parameters:

path	Input path.

Returns:

errc::success if permissions have been changed, otherwise a platform specific error_code.

Referenced by llvm::FileOutputBuffer::create().

error_code llvm::sys::fs::remove	(	const Twine &	path,
		bool &	existed
	)

Remove path. Equivalent to POSIX remove().

Parameters:

path	Input path.
existed	Set to true if path existed, false if it did not. undefined otherwise.

Returns:

errc::success if path has been removed and existed has been successfully set, otherwise a platform specific error_code.

error_code llvm::sys::fs::remove_all	(	const Twine &	path,
		uint32_t &	num_removed
	)

Recursively remove all files below path, then path. Files are removed as if by POSIX remove().

Parameters:

path	Input path.
num_removed	Number of files removed.

Returns:

errc::success if path has been removed and num_removed has been successfully set, otherwise a platform specific error_code.

Definition at line 924 of file PathV2.cpp.

References status(), llvm::Twine::toStringRef(), and llvm::sys::fs::file_status::type().

error_code llvm::sys::fs::rename	(	const Twine &	from,
		const Twine &	to
	)

Rename from to to. Files are renamed as if by POSIX rename().

Parameters:

from	The path to rename from.
to	The path to rename to. This is created.

error_code llvm::sys::fs::resize_file	(	const Twine &	path,
		uint64_t	size
	)

Resize path to size. File is resized as if by POSIX truncate().

Parameters:

path	Input path.
size	Size to resize to.

Returns:

errc::success if path has been resized to size, otherwise a platform specific error_code.

Referenced by llvm::FileOutputBuffer::commit().

error_code llvm::sys::fs::status	(	const Twine &	path,
		file_status &	result
	)

Get file status as if by POSIX stat().

Parameters:

path	Input path.
result	Set to the file status.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

Referenced by llvm::ConstantFoldCall(), ConstantFoldConvertToInt(), llvm::APFloat::convertFromSignExtendedInteger(), llvm::APFloat::convertToInteger(), llvm::FileOutputBuffer::create(), is_directory(), is_regular_file(), is_symlink(), and remove_all().

bool llvm::sys::fs::status_known

(

file_status

s

)

Is status available?

Parameters:

s	Input file status.

Returns:

True if status() != status_error.

Definition at line 697 of file PathV2.cpp.

References llvm::sys::fs::file_type::status_error, and llvm::sys::fs::file_status::type().

Referenced by exists().

error_code llvm::sys::fs::status_known	(	const Twine &	path,
		bool &	result
	)

Is status available?

Parameters:

path	Input path.
result	Set to true if status() != status_error.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.

error_code llvm::sys::fs::unique_file	(	const Twine &	model,
		int &	result_fd,
		SmallVectorImpl< char > &	result_path,
		bool	makeAbsolute = true,
		unsigned	mode = 0600
	)

Generate a unique path and open it as a file.

Generates a unique path suitable for a temporary file and then opens it as a file. The name is based on model with '%' replaced by a random char in [0-9a-f]. If model is not an absolute path, a suitable temporary directory will be prepended.

This is an atomic operation. Either the file is created and opened, or the file system is left untouched.

clang-%%-%%-%%-%%-%%.s => /tmp/clang-a0-b1-c2-d3-e4.s

Parameters:

model	Name to base unique path off of.
result_fd	Set to the opened file's file descriptor.
result_path	Set to the opened file's absolute path.
makeAbsolute	If true and model is not an absolute path, a temp directory will be prepended.

Returns:

errc::success if result_{fd,path} have been successfully set, otherwise a platform specific error_code.

Referenced by llvm::FileOutputBuffer::create(), and llvm::LockFileManager::LockFileManager().

error_code llvm::sys::fs::unmap_file_pages	(	void *	base,
		size_t	size
	)

Memory unmaps the contents of a file.

Parameters:

base	Pointer to the start of the buffer.
size	Byte length of the range to unmmap.

Returns:

errc::success if result has been successfully set, otherwise a platform specific error_code.