# 4.17. Functions and Macros

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An implementation is allowed to implement MPI_WTIME, MPI_WTICK, PMPI_WTIME, PMPI_WTICK, and the handle-conversion functions ( MPI_Group_f2c, etc.) in Section Transfer of Handles , and no others, as macros in C.

Advice to implementors.

Implementors should document which routines are implemented as macros. ( End of advice to implementors.)
Advice to users.

If these routines are implemented as macros, they will not work with the MPI profiling interface. ( End of advice to users.)

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MPI-2.0 of July 18, 1997
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