System.Posix.DynamicLinker.Prim

Copyright	(c) Volker Stolz <[email protected]> 2003
License	BSD-style (see the file libraries/base/LICENSE)
Maintainer	[email protected]
Stability	provisional
Portability	non-portable (requires POSIX)
Safe Haskell	Trustworthy
Language	Haskell2010

low level API

c_dlopen :: CString -> CInt -> IO (Ptr ()) Source

c_dlsym :: Ptr () -> CString -> IO (FunPtr a) Source

c_dlerror :: IO CString Source

c_dlclose :: Ptr () -> IO CInt Source

haveRtldNext :: Bool Source

On some hosts (e.g. SuSe and Ubuntu Linux) RTLD_NEXT (and RTLD_DEFAULT) are not visible without setting the macro _GNU_SOURCE. Since we don't want to define this macro, you can use the function haveRtldNext to check wether the flag Next is available. Ideally, this will be optimized by the compiler so that it should be as efficient as an #ifdef.

If you fail to test the flag and use it although it is undefined, packDL will throw an error.

haveRtldLocal :: Bool Source

packRTLDFlags :: [RTLDFlags] -> CInt Source

data RTLDFlags Source

Flags for dlopen.

packDL :: DL -> Ptr () Source

data DL Source

Flags for dlsym. Notice that Next might not be available on your particular platform! Use haveRtldNext.

If RTLD_DEFAULT is not defined on your platform, packDL Default reduces to nullPtr.