3.1 Type Constructors
Creates a new
C type value whose representation for foreign
code is the same as
type’s. The given conversions functions
convert to and from the Scheme representation of
type. Either
conversion function can be
#f, meaning that the conversion
for the corresponding direction is the identity function. If both
functions are
#f,
type is returned.
Returns
#t if
v is a
C type,
#f
otherwise.
Returns the size or alignment of a given type for the current
platform.
Returns a value to describe the eventual C representation of the
type. It can be any of the following symbols:
| 'int8 'uint8 'int16 'uint16 'int32 'uint32 'int64 'uint64 |
| 'float 'double 'bool 'void 'pointer 'fpointer |
| 'bytes 'string/ucs-4 'string/utf-16 |
The result can also be a list, which describes a C struct whose
element representations are provided in order within the list.
Possible values for
symbol are
'int,
'char,
'short,
'long,
'*,
'void,
'float,
'double. The result is the size of the
correspond type according to the C
sizeof operator for the
current platform. The
compiler-sizeof operation should be
used to gather information about the current platform, such as
defining alias type like
_int to a known type like
_int32.