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types.h(3head) [opendarwin man page]

types.h(3HEAD)							      Headers							    types.h(3HEAD)

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 instruc- tion set architectures. _LITTLE_ENDIAN _BIG_ENDIAN The natural byte order of the processor. A pointer to an int points to the least/most significant byte of that int. _STACK_GROWS_UPWARD _STACK_GROWS_DOWNWARD The processor specific direction of stack growth. A push onto the stack increases/decreases the stack pointer, so it stores data at successively higher/lower addresses. _CHAR_IS_UNSIGNED _CHAR_IS_SIGNED The C Compiler implements objects of type char as unsigned or signed respectively. This is really an implementation choice of the com- piler, but it is specified in the ABI and tends to be uniform across compilers for an instruction set architecture. _CHAR_ALIGNMENT _SHORT_ALIGNMENT _INT_ALIGNMENT _LONG_ALIGNMENT _LONG_LONG_ALIGNMENT _DOUBLE_ALIGNMENT _LONG_DOUBLE_ALIGNMENT _POINTER_ALIGNMENT _FLOAT_ALIGNMENT The ABI defines alignment requirements of each of the primitive object types. Some, if not all, might be hardware requirements as well. The values are expressed in bytes. _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 sections 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 "); #else #ifdef _ILP32 printf("The data model is ILP32 in this environment "); #else #error "Unknown data model!" #endif #endif ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ SEE ALSO
types32.h(3HEAD), attributes(5), standards(5) SunOS 5.10 6 Oct 2004 types.h(3HEAD)
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