On 01/22/2011 11:29 AM, Stefan Hajnoczi wrote:
Add functions to create coroutines and transfer control into a coroutine
and back out again.
+
+struct Coroutine {
+ struct coroutine co;
+};
+
+/**
+ * Coroutine entry point
+ *
+ * When the coroutine is entered for the first time, opaque is
passed in as an
+ * argument.
+ *
+ * When this function returns, the coroutine is destroyed
automatically and the
+ * return value is passed back to the caller who last entered the
coroutine.
+ */
+typedef void * coroutine_fn CoroutineEntry(void *opaque);
The more modern style is to use the Coroutine structure as argument,
and let the coroutine function use container_of() to obtain access to
its own data structures. Similarly it can store any return value
there, avoiding casts to and from void pointers.