Desperately looking for a work-around to load and unload D shared libraries from C on OSX

[bitwise via Digitalmars-d]

On Thursday, 17 September 2015 at 20:47:49 UTC, Jacob Carlborg 
wrote:
> On 2015-09-17 21:42, bitwise wrote:
>
>> Ok, but this kinda defeats the purpose, as the op wants to 
>> unload the
>> library ;)
>
> He said he doesn't want dlopen to crash, if it doesn't unload 
> it fixes the problem ;)

True. Looking at his bug report now, it seems his dylib is a VST 
plugin. Had he just said that to begin with, this conversation 
would have been a lot easier -_-

The op shouldn't have to actually modify druntime in this case. 
He shouldn't have to replace "_dyld_register_func_for_add_image".

He can simply create a second empty callback in VSTPluginMain 
which will pin his library:

static bool didInitRuntime = false;

const char* ignoreImageLoad(
     enum dyld_image_states state,
     uint32_t infoCount,
     const struct dyld_image_info info[])
{
     // ignore.
}

extern(C) void* VSTPluginMain(void* hostCallback)
{
     import core.runtime;

     if(!didInitRuntime)
     {
         Runtime.initialize();
         dyld_register_image_state_change_handler(
             dyld_image_state_initialized,
             &ignoreImageLoad);
         didInitRuntime = true;
     }

     import std.stdio;
     import core.stdc.stdio;
     printf("Hello !\n");

     // Runtime.terminate();
     return null;
}

     Bit