The pfsctl (BPX1PCT) application programming interface can be invoked in a 64-bit environment. To do this, you must take the following steps:

1. Replace the BPX1PCT with BPX4PCT
2. Replace the #pragma linkage(BPX1PCT, OS) statement with #pragma linkage(BPX4PCT, OS64_NOSTACK)
3. Change all the "long" declares to "int"
4. Ensure there are appropriate includes for function calls
5. Ensure all functions requiring 64-bit parameters are passing 64-bit numbers (for example, ctime_r).

The remaining code is, or can remain, unchanged. Statistics iocounts information (64-bit mode) shows example code that has been updated to be invoked in a 64-bit environment.