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types.h(3head)
types.h(3HEAD) Headers types.h(3HEAD)
NAME
types.h, types - primitive system data types
SYNOPSIS
#include <sys/types.h>
DESCRIPTION
The data types defined in <sys/types.h> are as follows:
32-bit Solaris
The data types listed below are defined in <sys/types.h> for 32-bit
Solaris.
typedef struct { int r[1]; } *physadr;
typedef long clock_t;
typedef long daddr_t;
typedef char * caddr_t;
typedef unsigned char unchar;
typedef unsigned short ushort;
typedef unsigned int uint;
typedef unsigned long ulong_t;
typedef unsigned long ino_t;
typedef long uid_t;
typedef long gid_t;
typedef ulong_t nlink_t;
typedef ulong_t mode_t;
typedef short cnt_t;
typedef long time_t;
typedef int label_t[10];
typedef ulong_t dev_t;
typedef long off_t;
typedef long pid_t;
typedef long paddr_t;
typedef int key_t;
typedef unsigned char use_t;
typedef short sysid_t;
typedef short index_t;
typedef short lock_t;
typedef unsigned int size_t;
typedef long clock_t;
typedef long pid_t;
64-bit Solaris
The data types listed below are defined in <sys/types.h> for 64-bit
Solaris.
typedef long blkcnt_t
typedef long clock_t
typedef long daddr_t
typedef ulong_t dev_t
typedef ulong_t fsblkcnt_t
typedef ulong_t fsfilcnt_t
typedef int gid_t
typedef int id_t
typedef long ino_t
typedef int key_t
typedef uint_t major_t
typedef uint_t minor_t
typedef uint_t mode_t
typedef uint_t nlink_t
typedef int pid_t
typedef ptrdiff_t intptr_t
typedef ulong_t rlim_t
typedef ulong_t size_t
typedef uint_t speed_t
typedef long ssize_t
typedef long suseconds_t
typedef uint_t tcflag_t
typedef long time_t
typedef int uid_t
typedef int wchar_t
Preprocessor Symbols
For 32-bit programs, pointers and the C data types int and long are all
32-bit quantities. For 64-bit programs, pointers and the C data type
long are defined as 64-bit quantities.
The preprocessor symbol _ILP32, made visible by the inclusion of
<sys/types.h>, can be used with the preprocessor #ifdef construct to
define sections of code that will be compiled only as part of a 32-bit
version of a given C program.
The preprocessor symbol _LP64 can be used in the same way to define
sections of code that will be compiled only as part of a 64-bit version
of a given C program. See EXAMPLES.
This header incorporates definitions of other preprocessor symbols that
can be useful when keeping code portable between different instruction
set architectures.
_LITTLE_ENDIAN The natural byte order of the processor. A
_BIG_ENDIAN pointer to an int points to the least/most
significant byte of that int.
_STACK_GROWS_UPWARD The processor specific direction of stack
_STACK_GROWS_DOWNWARD growth. A push onto the stack
increases/decreases the stack pointer, so it
stores data at successively higher/lower
addresses.
_CHAR_IS_UNSIGNED The C Compiler implements objects of type
_CHAR_IS_SIGNED char as unsigned or signed respectively.
This is really an implementation choice of
the compiler, but it is specified in the ABI
and tends to be uniform across compilers for
an instruction set architecture.
_CHAR_ALIGNMENT The ABI defines alignment requirements of
_SHORT_ALIGNMENT each of the primitive object types. Some, if
_INT_ALIGNMENT not all, might be hardware requirements as
_LONG_ALIGNMENT well. The values are expressed in bytes.
_LONG_LONG_ALIGNMENT
_DOUBLE_ALIGNMENT
_LONG_DOUBLE_ALIGNMENT
_POINTER_ALIGNMENT
_FLOAT_ALIGNMENT
_MAX_ALIGNMENT The most stringent alignment requirement as
specified by the ABI. Equal to the maximum
of all the above _XXX_ALIGNMENT values.
_LONG_LONG_ALIGNMENT_32 The 32-bit ABI supported by a 64-bit kernel
may have different alignment requirements
for primitive object types. The value of
this identifier is expressed in bytes.
USAGE
The daddr_t type is used for disk addresses except in an inode on disk.
Times are encoded in seconds since 00:00:00 UTC, January 1, 1970. The
major and minor parts of a device code specify kind and unit number of
a device and are installation-dependent. Offsets are measured in bytes
from the beginning of a file.
The label_t[] types are used to save the processor state while another
process is running.
EXAMPLES
Example 1 Use of preprocessor symbol _LP64.
In the following example, the preprocessor symbol _LP64 defines sec‐
tions of code that will be compiled only as part of a 64-bit version of
the given C program.
#include <sys/types.h>
...
#ifdef _LP64
printf("The data model is LP64 in this environment\n");
#else
#ifdef _ILP32
printf("The data model is ILP32 in this environment\n");
#else
#error "Unknown data model!"
#endif
#endif
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted
SEE ALSO
types32.h(3HEAD), attributes(7), standards(7)
Oracle Solaris 11.4 6 Oct 2004 types.h(3HEAD)