Make it possible to check whether a coroutine is the default main
coroutine (the "leader") or not.
Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com>
---
coroutine.h | 2 ++
coroutine_ucontext.c | 5 +++++
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/coroutine.h b/coroutine.h
index 5316535..3aca19a 100644
--- a/coroutine.h
+++ b/coroutine.h
@@ -58,6 +58,8 @@ void *coroutine_swap(struct coroutine *from, struct coroutine
*to, void *arg);
struct coroutine *coroutine_self(void);
+int coroutine_is_leader(struct coroutine *co);
+
void *coroutine_yieldto(struct coroutine *to, void *arg);
void *coroutine_yield(void *arg);
diff --git a/coroutine_ucontext.c b/coroutine_ucontext.c
index 289e5bd..b90a2f6 100644
--- a/coroutine_ucontext.c
+++ b/coroutine_ucontext.c
@@ -80,6 +80,11 @@ struct coroutine *coroutine_self(void)
return current;
}
+int coroutine_is_leader(struct coroutine *co)
+{
+ return co == &leader;
+}
+
void *coroutine_swap(struct coroutine *from, struct coroutine *to, void *arg)
{
int ret;
--
1.7.2.3
