If you need to call a routine not listed in the portability library, you may find it in the standard Visual Fortran library. Routines implemented as intrinsic or in the DFLIB module are:
| Procedure | Description |
|---|---|
| AND | Bitwise AND |
| OR | Bitwise OR |
| XOR | Bitwise XOR |
| FREE | Frees dynamic memory |
| GETARG | Returns command line arguments |
| MALLOC | Allocates dynamic memory |
| LSHIFT | Left bitwise shift |
| RSHIFT | Right bitwise shift |
| EXIT | Exits program with a return code |
Visual Fortran does not support certain other functions, such as:
| Routine | Description | Similar Visual Fortran Functionality |
|---|---|---|
| CMVGM, CMVGN, CMVGP, CMVGT, CMVGZ | Conditional merge | MERGE intrinsic function |
| FORK | Creates an identical process | CreateProcess, System |
| LINK | Creates a hard link between two files | none |
| SYMLNK | Creates a symbolic link between two files | none |
Replace conditional merge routines with the standard Fortran 95/90 intrinsic MERGE routine, using the following arguments:
| Routine | Fortran 95/90 Replacement |
|---|---|
| CVMGP(tsrc, fsrc, mask) | MERGE(tsrc, fsrc, mask >= 0) |
| CVMGM(tsrc, fsrc, mask) | MERGE(tsrc, fsrc, mask < 0) |
| CVMGZ(tsrc, fsrc, mask) | MERGE(tsrc, fsrc, mask = 0) |
| CVMGN(tsrc, fsrc, mask) | MERGE(tsrc, fsrc, mask /= 0) |
| CVMGT(tsrc, fsrc, mask) | MERGE(tsrc, fsrc, mask = .TRUE.) |
There is no analogy to U*X file system links or soft links under Windows.
There is also no analogy to the U*X FORK routine, since FORK creates a duplicate image of the parent process which is independent from the parent process. With Windows operating systems, both parent and child processes share the same address space and share system resources. For more information on creating child processes, see Creating Multithread Applications.