Fix fibers build on older boost

Summary:
[Folly] Fix `folly/fibers/` build on older boost.

Where `jump_fcontext` takes `intptr_t` rather than an actual pointer, and we warn about implicit conversions from pointers to integral types.

Reviewed By: Orvid

Differential Revision: D6098230

fbshipit-source-id: 61bd7bdff5de728d3febe8b35c97d024ab6f236a

diff --git a/folly/fibers/BoostContextCompatibility.h b/folly/fibers/BoostContextCompatibility.h
index 2f6cc127e32c29708051fe32cd91827708ab9df9..5531684adaed2864ad71c16c61ff2003954674cc 100644 (file)
--- a/folly/fibers/BoostContextCompatibility.h
+++ b/folly/fibers/BoostContextCompatibility.h
@@ -106,9 +106,9 @@ class FiberImpl {
         boost::context::jump_fcontext(&fiberContext_, mainContext_, 0);
 #elif BOOST_VERSION >= 105200
     auto context =
         boost::context::jump_fcontext(&fiberContext_, mainContext_, 0);
 #elif BOOST_VERSION >= 105200
     auto context =

-        boost::context::jump_fcontext(fiberContext_, &mainContext_, nullptr);
+        boost::context::jump_fcontext(fiberContext_, &mainContext_, 0);

 #else
 #else

-    auto context = jump_fcontext(&fiberContext_, &mainContext_, nullptr);
+    auto context = jump_fcontext(&fiberContext_, &mainContext_, 0);

 #endif
     DCHECK_EQ(this, reinterpret_cast<FiberImpl*>(context));
   }
 #endif
     DCHECK_EQ(this, reinterpret_cast<FiberImpl*>(context));
   }