On Wed, Mar 15, 2017 at 4:42 PM, Raffaello Giulietti < raffaello.giulie...@lifeware.ch> wrote:
> Hi Ben, > > my understanding is that SetDllDirectory only affects the search path of > libraries that are loaded at *run-time* with LoadLibrary. > > What I'm asking for is a mechanism that works at *load-time*, when a > library I'm accessing directly depends on another one which I'm not > targeting directly. > I don't quite follow. I'm not intimate with Windows dynamic loading, so these questions are an opportunity for me to learn... You can't mean when Pharo loads, because it wouldn't know of OTHER.DLL ? Do you mean that LoadLibrary is not called explicitly by YOUR.DLL before its uses the function from OTHER.DLL? Do you mean you link OTHER.DLL to YOUR.DLL at compile time? But still, YOUR.DLL it not loaded until called via Pharo FFI, so neither is OTHER.DLL, and Dynamic-Link Library Search Order [1] says... "If a DLL with the same module name is already loaded in memory, the system uses the loaded DLL, no matter which directory it is in. The system does not search for the DLL." So maybe before calling any of YOUR.DLL, do a SetDllDirectory followed by a LoadLibrary(OTHER.DLL) and later when you call into YOUR.DLL, OTHER.DLL is already loaded. Otherwise it would seems(?) your options are either Manifests or Dynamic-Link Library Redirection, both done outside of Pharo. [1] https://msdn.microsoft.com/en-us/library/windows/desktop/ms682586(v=vs.85).aspx cheers -ben > But I'll try whether SetDllDirectory also affects load-time searches. > > Anyway, I hope future versions of the UFFI to offer setting the search > paths more easily. > > > > Greetings > Raffaello > > > > On 2017-03-15 07:22, Ben Coman wrote: > >> >> >> On Tue, Mar 14, 2017 at 11:23 PM, Raffaello Giulietti >> <raffaello.giulie...@lifeware.ch >> <mailto:raffaello.giulie...@lifeware.ch>> wrote: >> >> Hi, >> >> say I want to directly use a library that depends on other libraries >> in different folders. How does UFFI proceed to find these other >> libraries? >> >> Is there a way to specify the search folders in UFFI? >> >> I'm on Windows and in Pharo5/6. >> >> Greetings >> Raffaello >> >> >> I assume you mean specifying the search path outside of Pharo. >> Perhaps call SetDllDirectory via Pharo FFI. >> (YMMV disclaimer, my knowledge of this is a few minutes searching) >> >> SetDllDirectory function >> https://msdn.microsoft.com/en-us/library/windows/desktop/ms6 >> 86203(v=vs.85).aspx >> >> LoadLibrary function >> https://msdn.microsoft.com/en-us/library/windows/desktop/ms6 >> 84175(v=vs.85).aspx >> >> Dynamic-Link Library Search Order >> https://msdn.microsoft.com/en-us/library/windows/desktop/ms6 >> 82586(v=vs.85).aspx >> >> cheers -ben >> > > >
