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addressof
```
OBJECT addressof symbol
```
Returns the address of a symbol from the loaded library.
::cffi::Wrapper
alias
```
alias subcommand ...
```
A command ensemble.
::cffi
alias body
```
alias body alias_name
```
Returns the resolved body of an alias.
::cffi
alias clear
```
alias clear 
```
Deletes all aliases from the interpreter
::cffi

alias define name definition
alias define aliasdefs

Defines one or more type aliases. ::cffi

alias delete
```
alias delete pattern
```
Deletes aliases matching a pattern.
::cffi
alias list
```
alias list ?pattern?
```
Returns a list of aliases that match the specified pattern.
::cffi
alias load
```
alias load alias_set
```
Loads predefined type aliases.
::cffi
allocate
```
OBJECT allocate ?args?
```
Allocates memory for one or more C structs.
::cffi::Struct
arena
```
arena subcommand ...
```
A command ensemble.
::cffi
arena allocate
```
arena allocate sizespec ?tag?
```
Allocates memory in the current arena frame in the memory arena.
::cffi
arena new
```
arena new typespec initializer ?tag?
```
Allocates memory in the current arena for a type and initializes it.
::cffi
arena popframe
```
arena popframe 
```
Pops the current frame from the memory arena.
::cffi
arena pushframe
```
arena pushframe ?size?
arena pushframe size ?tag?
```
Pushes a new stack frame on the memory arena.
::cffi
call
```
call fnptr ?args?
```
Invokes a C function through a function pointer.
::cffi
callback
```
callback subcommand ...
```
A command ensemble.
::cffi
callback free
```
callback free cb
```
Frees a callback pointer
::cffi
callback new
```
callback new protoname cmdprefix error_value
```
Wraps a script level command into a C function
::cffi
constructor
```
Interface create OBJNAME ?args?
Interface new ?args?
```
Defines an interface consisting of method definitions.
::cffi::Interface
constructor
```
Struct create OBJNAME definition ?args?
Struct new definition ?args?
```
Constructs a script level object that maps to a C struct definition.
::cffi::Struct
constructor
```
Union create OBJNAME definition ?args?
Union new definition ?args?
```
Constructs a script level object that maps to a C union definition.
::cffi::Union
constructor
```
Wrapper create OBJNAME path
Wrapper new path
```
Wraps a shared library / DLL, loading it in the process.
::cffi::Wrapper
decode
```
OBJECT decode field uvalue
```
Returns a field from a native union.
::cffi::Union
describe
```
OBJECT describe 
```
Returns a human-readable description of the C struct definition.
::cffi::Struct
describe
```
OBJECT describe 
```
Returns a human-readable description of the C union definition.
::cffi::Union
destructor
```
OBJECT destroy 
```
Destroys the object and releases internal resources.
::cffi::Wrapper
encode
```
OBJECT encode field value
```
Returns a union in native form with the specified field value.
::cffi::Union
enum
```
enum subcommand ...
```
A command ensemble.
::cffi
enum alias
```
enum alias enumname enumdefs typedecl
```
Defines a new enumeration and alias of the same name
::cffi
enum clear
```
enum clear 
```
Deletes all enumerations from the interpreter
::cffi
enum define
```
enum define enumname enumdefs
```
Defines a new enumeration.
::cffi
enum delete
```
enum delete pattern
```
Deletes enumerations.
::cffi
enum flags
```
enum flags enumname membernames
```
Defines an enumeration as bit flags.
::cffi
enum list
```
enum list pattern
```
Lists enumerations.
::cffi
enum mask
```
enum mask enumname membernames
```
Returns an integer mask formed by bitwise OR-ing the passed enumeration members
::cffi
enum members
```
enum members enumname
```
Returns a dictionary containing the members in an enumeration.
::cffi
enum name
```
enum name enumname membervalue ?default?
```
Returns the symbolic name of a value in an enumeration.
::cffi
enum names
```
enum names enumname
```
Returns a list containing the names of members in an enumeration.
::cffi
enum sequence
```
enum sequence enumname membernames ?start?
```
Defines an enumeration with consecutive member values
::cffi
enum unmask
```
enum unmask enumname mask
```
Returns a list of enumeration member names corresponding to the bits set in $mask.
::cffi
enum value
```
enum value enumname membername ?default?
```
Returns the value of an enumeration member
::cffi
fieldpointer
```
OBJECT fieldpointer pointer fieldname ?tag? ?index?
```
Returns a pointer corresponding to the address of a field within a native structure
::cffi::Struct
free
```
OBJECT free pointer
```
Frees memory that was allocated for a native C struct.
::cffi::Struct
frombinary
```
OBJECT frombinary bin_value
```
Decodes a Tcl binary string containing a native C struct into a Tcl dictionary.
::cffi::Struct
fromnative
```
OBJECT fromnative pointer ?index?
```
Decodes native C struct(s) in memory into a Tcl dictionary.
::cffi::Struct
fromnative!
```
OBJECT fromnative! pointer ?index?
```
Decodes native C struct(s) in memory into a Tcl dictionary.
::cffi::Struct
function
```
OBJECT function fnname fntype parameters
```
Creates a Tcl command to invoke a C function in the loaded library.
::cffi::Wrapper
functions
```
OBJECT functions fnlist ?args?
```
Creates Tcl commands for multiple C functions within the loaded library.
::cffi::Wrapper
getnative
```
OBJECT getnative pointer fieldname ?index?
```
Returns the value of a field in a native structure in memory
::cffi::Struct
getnative!
```
OBJECT getnative! pointer fieldname ?index?
```
Returns the value of a field in a native structure in memory
::cffi::Struct
getnativefields
```
OBJECT getnativefields pointer fieldnames ?index?
```
Retrieve values of multiple fields from a native struct in memory.
::cffi::Struct
getnativefields!
```
OBJECT getnativefields! pointer fieldnames ?index?
```
Retrieve values of multiple fields from a native struct in memory.
::cffi::Struct
help
```
help subcommand ...
```
A command ensemble.
::cffi
help alias
```
help alias NAME
```
Returns a string describing an alias definition.
::cffi
help enum
```
help enum NAME
```
Returns a string describing an enum definition.
::cffi
help function
```
help function NAME
```
Returns a string describing the syntax and parameter definitions for a CFFI wrapped function.
::cffi
help functions
```
help functions ?PATTERN?
```
Returns a list of CFFI-wrapped functions matching the pattern PATTERN.
::cffi
help struct
```
help struct NAME
```
Returns a string describing field types in a Struct.
::cffi
help union
```
help union NAME
```
Returns a string describing field types in a Union.
::cffi
id
```
OBJECT id 
```
Returns the id for the interface as passed via the -id option in the interface definition.
::cffi::Interface
info
```
OBJECT info ?args?
```
Returns a dictionary containing information about the struct layout
::cffi::Struct
info
```
OBJECT info 
```
Returns a dictionary containing information about the info layout
::cffi::Union
Interface ::cffi
limits
```
limits type
```
Get the lower and upper limits for an integral base type
::cffi
memory
```
memory subcommand ...
```
A command ensemble.
::cffi
memory allocate
```
memory allocate sizespec ?tag?
```
Allocates memory of the specified size
::cffi
memory fill
```
memory fill pointer bytevalue count ?offset?
```
Fills memory with a specified value
::cffi
memory free
```
memory free pointer
```
Frees the memory referenced by the passed pointer
::cffi
memory frombinary
```
memory frombinary bin_value ?tag?
```
Allocates memory and copied the passed Tcl binary string into it.
::cffi
memory fromstring
```
memory fromstring value ?encoding?
```
Allocates memory and stores a Tcl string in it in the specified encoding.
::cffi
memory fromunistring
```
memory fromunistring value
```
Allocates memory and stores a Tcl string as a sequence of Tcl_UniChars.
::cffi
memory fromwinstring
```
memory fromwinstring value
```
Allocates memory and stores a Tcl string as a sequence of winchars.
::cffi
memory get
```
memory get pointer typespec ?index?
```
Converts a native value in memory into a Tcl script level value
::cffi
memory get!
```
memory get! pointer typespec ?index?
```
Converts a native value in memory into a Tcl script level value
::cffi
memory new
```
memory new typespec initializer ?tag?
```
Allocates memory for a type and initializes it.
::cffi
memory set
```
memory set pointer typespec value ?index?
```
Converts a value as per a type specification and stores it in memory in native form
::cffi
memory set!
```
memory set! pointer typespec value ?index?
```
Converts a value as per a type specification and stores it in memory in native form
::cffi
memory tobinary
```
memory tobinary pointer size ?offset?
```
Returns the content of a memory block as a Tcl binary string.
::cffi
memory tobinary!
```
memory tobinary! pointer size ?offset?
```
Returns the content of a memory block as a Tcl binary string.
::cffi
memory tostring
```
memory tostring pointer ?encoding? ?offset?
```
Returns the content of a memory block as a Tcl string.
::cffi
memory tostring!
```
memory tostring! pointer ?encoding? ?offset?
```
Returns the content of a memory block as a Tcl string.
::cffi
memory tounistring
```
memory tounistring pointer ?offset?
```
Returns the content of a memory block containing a nul-terminated sequence of Tcl_UniChars as a Tcl string.
::cffi
memory tounistring!
```
memory tounistring! pointer ?offset?
```
Returns the content of a memory block containing a nul-terminated sequence of Tcl_UniChars as a Tcl string.
::cffi
memory towinstring
```
memory towinstring pointer ?offset?
```
Returns the content of a memory block containing a nul-terminated sequence of winchars as a Tcl string.
::cffi
memory towinstring!
```
memory towinstring! pointer ?offset?
```
Returns the content of a memory block containing a nul-terminated sequence of winchars as a Tcl string.
::cffi
methods
```
OBJECT methods methodlist ?args?
```
Creates Tcl commands wrapping the C functions comprising an interface.
::cffi::Interface
name
```
OBJECT name 
```
Returns the name of the struct.
::cffi::Struct
name
```
OBJECT name 
```
Returns the name of the struct.
::cffi::Union
new
```
OBJECT new ?initval?
```
Allocates and initializes a native struct in memory.
::cffi::Struct
path
```
OBJECT path 
```
Returns the file system path for the wrapped library or image wrapped by the object.
::cffi::Wrapper
pkgconfig
```
pkgconfig subcommand ...
```
A command ensemble.
::cffi
pkgconfig get
```
pkgconfig get key
```
Gets the value of a configuration key.
::cffi
pkgconfig list
```
pkgconfig list 
```
Returns the list of keys containing information about the package configuration.
::cffi
pointer
```
pointer subcommand ...
```
A command ensemble.
::cffi
pointer address
```
pointer address pointer
```
Returns the address component of the pointer.
::cffi
pointer cast
```
pointer cast pointer ?TAG?
```
Casts a pointer to a new tag.
::cffi
pointer castable
```
pointer castable subtags supertag
```
Specifies that pointers with tag $subtag are acceptable in declarations that require $supertag.
::cffi
pointer castables
```
pointer castables 
```
Returns a list of tags that have been marked as castable with the pointer castable command..
::cffi
pointer check
```
pointer check pointer
```
Validates a pointer and raise an exception if invalid.
::cffi
pointer compare
```
pointer compare ptr1 ptr2
```
Compares if two pointers are the same
::cffi
pointer counted
```
pointer counted pointer
```
Registers a pointer as a counted pointer
::cffi
pointer dispose
```
pointer dispose pointer
```
Unregisters a safe or counted pointer
::cffi
pointer info
```
pointer info pointer
```
Returns a dictionary containing registration information about a pointer.
::cffi
pointer invalidate
```
pointer invalidate pointer
```
Unregisters a safe, counted or pinned pointer irrespective its reference count.
::cffi
pointer isnull
```
pointer isnull pointer
```
Returns true if the pointer is a NULL pointer, false otherwise.
::cffi
pointer isvalid
```
pointer isvalid pointer
```
Validates a pointer.
::cffi
pointer list
```
pointer list ?tag?
```
Returns a list of registered pointers optionally filtered by a tag.
::cffi
pointer make
```
pointer make address ?tag?
```
Return a pointer for a memory address.
::cffi
pointer pin
```
pointer pin pointer
```
Pins a pointer as permanently safe.
::cffi
pointer safe
```
pointer safe pointer
```
Registers a pointer as a safe uncounted pointer.
::cffi
pointer tag
```
pointer tag pointer
```
Returns the pointer tag
::cffi
pointer uncastable
```
pointer uncastable tag
```
Makes pointers with the specified tag uncastable to another type
::cffi
prototype
```
prototype subcommand ...
```
A command ensemble.
::cffi
prototype delete
```
prototype delete pattern
```
Deletes prototypes matching a pattern.
::cffi
prototype function
```
prototype function name fntype parameters
```
Defines a function prototype for calling a function using the default C calling convention.
::cffi
prototype list
```
prototype list ?pattern?
```
Returns a list of prototypes matching the specified pattern.
::cffi
prototype stdcall
```
prototype stdcall name fntype parameters
```
Defines a function prototype for calling a function using the stdcall calling convention.
::cffi
savederrors
```
savederrors 
```
Return errno and GetLastError() values from the last CFFI call annotated with saveerrors.
::cffi
setnative
```
OBJECT setnative pointer fieldname value ?index?
```
Sets the value of a field in a native structure in memory
::cffi::Struct
setnative!
```
OBJECT setnative! pointer fieldname value ?index?
```
Sets the value of a field in a native structure in memory
::cffi::Struct
size
```
OBJECT size ?args?
```
Returns the size of the struct.
::cffi::Struct
size
```
OBJECT size 
```
Returns the size of the union.
::cffi::Union
stdcall
```
OBJECT stdcall fnname fntype parameters
```
Creates a Tcl command to invoke a C function that uses the __stdcall calling convention from the loaded library..
::cffi::Wrapper
stdcalls
```
OBJECT stdcalls fnlist ?args?
```
Creates Tcl commands for multiple C functions within the loaded library that all use the __stdcall calling convention.
::cffi::Wrapper
stdmethods
```
OBJECT stdmethods methodlist ?args?
```
Creates Tcl commands corresponding to the C functions comprising an interface.
::cffi::Interface
Struct ::cffi
tobinary
```
OBJECT tobinary dict_value
```
Encodes the Tcl representation of a C struct value into a Tcl binary string.
::cffi::Struct
tonative
```
OBJECT tonative pointer initializer ?index?
```
Writes the Tcl dictionary representation of a C struct value to memory in native form.
::cffi::Struct
tonative!
```
OBJECT tonative! pointer initializer ?index?
```
Writes the Tcl dictionary representation of a C struct value to memory in native form.
::cffi::Struct
type
```
type subcommand ...
```
A command ensemble.
::cffi
type count
```
type count type
```
Returns the count of elements in an array type
::cffi
type frombinary
```
type frombinary typespec value
```
Converts the native binary value to its script level representation.
::cffi
type info
```
type info typedecl ?args?
```
Returns a dictionary containing various information about a type declaration
::cffi
type size
```
type size type ?args?
```
Returns the size of a type in terms of the number of bytes of memory occupied by that type.
::cffi
type tobinary
```
type tobinary typespec value
```
Converts a script level value to a native representation.
::cffi
Union ::cffi
Wrapper ::cffi