Re: storing a function pointer in pthread thread-specific data

From: helmut.zeisel_at_[hidden]
Date: 2001-10-11 13:09:46

--- In boost_at_y..., Darin Adler <darin_at_b...> wrote:
>
> 
> I just realized we don't need to put the thing into a struct. We can
just
> pass &func to pthread_setspecific and do:
> 

So the patch reduces now to:

@@ -38,8 +38,8 @@
 
 static void do_once()
 {
-    once_callback cb =
reinterpret_cast<once_callback>(pthread_getspecific(key));
-    (*cb)();
+    once_callback* cb =
static_cast<once_callback*>(pthread_getspecific(key));
+    (**cb)();
 }
 
 }
@@ -85,7 +85,8 @@
        }
 #elif defined(BOOST_HAS_PTHREADS)
     pthread_once(&once, &key_init);
-    pthread_setspecific(key, func);
+    once_callback w = func;
+    pthread_setspecific(key, &w);
        pthread_once(&flag, do_once);
 #endif
 }            

It works with the test program.

> 
> My apologies for spending so much list bandwidth on this minor
coding issue.
>

Since the source code is now smaller,
the lost bandwidth might be compensated in the future ;-)

Helmut