The Boost guys factored the context switching and stack allocation stuff in to a separate library - Boost Context[0], which supports a bunch of architectures[1]

The Boost guys factored the context switching and stack allocation stuff in to a separate library - Boost Context[0], which supports a bunch of architectures[1]. I'm sure their fcontext code could be lifted. They claim on modern x86-64 that a switch takes about 8ns[2] The Boost Coroutine library is built on top, adds type safety, ensures the stack is unwound when contexts are destroyed, and enables propagation of exceptions across switches. $ ls -lh /usr/lib/libboost_context.so.1.58.0 -rwxr-xr-x 1 root root 55K May 30 09:58 /usr/lib/libboost_context.so.1.58.0 [0] http://www.boost.org/doc/libs/1_58_0/libs/context/doc/html/index.html http://www.boost.org/doc/libs/1_58_0/libs/context/doc/html/i... [1] http://www.boost.org/doc/libs/1_58_0/libs/context/doc/html/context/architectures.html http://www.boost.org/doc/libs/1_58_0/libs/context/doc/html/c... [2] http://www.boost.org/doc/libs/1_58_0/libs/context/doc/html/context/performance.html http://www.boost.org/doc/libs/1_58_0/libs/context/doc/html/c...