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Diffstat (limited to 'rts/Adjustor.c')
| -rw-r--r-- | rts/Adjustor.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/rts/Adjustor.c b/rts/Adjustor.c index 767a9ce9b7..7f01d189a0 100644 --- a/rts/Adjustor.c +++ b/rts/Adjustor.c @@ -5,7 +5,9 @@ * * ---------------------------------------------------------------------------*/ -/* A little bit of background... +/* +Note [Adjustors] +~~~~~~~~~~~~~~~~ An adjustor thunk is a dynamically allocated code snippet that allows Haskell closures to be viewed as C function pointers. @@ -34,6 +36,11 @@ An adjustor thunk differs from a C function pointer in one respect: when the code is through with it, it has to be freed in order to release Haskell and C resources. Failure to do so will result in memory leaks on both the C and Haskell side. + +How we implement adjustors is platform dependent (specifically determined by +USE_LIBFFI_FOR_ADJUSTORS). On PowerPC, x86-64 and i386 we use a home-grown +adjustor implementation. On all other platforms we rather use libffi. Also see +Note [Uses of libffi in GHC] in hadrian's Rules.Libffi. */ #include "PosixSource.h" |