benchtests: Add new directive for benchmark initialization hook

Add a new 'init' directive that specifies the name of the function to
call to do function-specific initialization.  This is useful for
benchmarks that need to do a one-time initialization before the
functions are executed.

1 files changed, 1 insertions, 0 deletions

diff --git a/benchtests/README b/benchtests/README
index 52a3cc2062..999d268cf8 100644
--- a/benchtests/README
+++ b/benchtests/README
@@ -62,6 +62,7 @@ one to add `foo' to the bench tests:
     and functions (specifically, this includes using "#include "source").
     See pthread_once-inputs and pthreads_once-source.c for an example of how
     to use this to benchmark a function that needs state across several calls.
+  - init: Name of an initializer function to call to initialize the benchtest.
   - name: See following section for instructions on how to use this directive.
 
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