Multithreaded Programming Guide

Using the 64–bit Architecture

For application developers, the major difference between the Solaris 64–bit and 32–bit operating environments is the C–language data type model used. The 64–bit data type uses the LP64 model where longs and pointers are 64–bits wide. All other fundamental data types remain the same as those of the 32–bit implementation. The 32–bit data type uses the ILP32 model where ints, longs, and pointers are 32–bits.

The following summary briefly describes the major features and considerations for using the 64–bit environment: