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+== Other functions ==
+
+Random number generation, memory allocation, logging.
+
+[[randomref]]
+=== Random bits ===
+
+The first time PBC is asked to generate a random number,
+the library will try to open the file `/dev/urandom` as a
+source of random bits. If this fails, PBC falls back to a deterministic
+random number generator (which is of course completely useless for
+cryptography).
+
+It is possible to change the file used for random bits. Also, explicitly
+selecting the deterministic random number generator will
+suppress the warning.
+
+On Windows, by default, PBC uses the Microsoft Crypto API to generate random
+bits.
+
+include::gen/pbcrandom.txt[]
+
+=== Custom allocation ===
+
+Like GMP, PBC can be instructed to use custom memory allocation functions.
+This must be done before any memory allocation is performed,
+usually at the beginning of a program before any other PBC functions have
+been called.
+
+Also like GMP, the PBC wrappers around +malloc+
+and +realloc+ will print a message on standard error
+and terminate program execution if the calls fail.
+Replacements for these functions should act similarly.
+
+However, unlike GMP, PBC does not pass the number of bytes previously allocated
+along with the pointer in calls to +realloc+ and
++free+.
+
+include::gen/alloc.txt[]
+
+=== Logging ===
+
+include::gen/log.txt[]