Support concurrent Actor calls in Ray (#6053)

python/ray/includes/common.pxd

@@ -2,7 +2,7 @@ from libcpp cimport bool as c_bool
 from libcpp.memory cimport shared_ptr, unique_ptr
 from libcpp.string cimport string as c_string
 
-from libc.stdint cimport uint8_t, uint64_t, int64_t
+from libc.stdint cimport uint8_t, int32_t, uint64_t, int64_t
 from libcpp.unordered_map cimport unordered_map
 from libcpp.vector cimport vector as c_vector
 
@@ -76,6 +76,9 @@ cdef extern from "ray/common/status.h" namespace "ray" nogil:
         @staticmethod
         CRayStatus Interrupted(const c_string &msg)
 
+        @staticmethod
+        CRayStatus SystemExit()
+
         c_bool ok()
         c_bool IsOutOfMemory()
         c_bool IsKeyError()
@@ -205,6 +208,7 @@ cdef extern from "ray/core_worker/common.h" nogil:
         CActorCreationOptions()
         CActorCreationOptions(
             uint64_t max_reconstructions, c_bool is_direct_call,
+            int32_t max_concurrency,
             const unordered_map[c_string, double] &resources,
             const unordered_map[c_string, double] &placement_resources,
             const c_vector[c_string] &dynamic_worker_options,

python/ray/includes/libcoreworker.pxd

@@ -64,7 +64,8 @@ cdef extern from "ray/core_worker/core_worker.h" nogil:
                         const c_vector[CObjectID] &return_ids,
                         c_bool is_direct_call,
                         c_vector[shared_ptr[CRayObject]] *returns) nogil,
-                    CRayStatus() nogil)
+                    CRayStatus() nogil,
+                    void () nogil)
         void Disconnect()
         CWorkerType &GetWorkerType()
         CLanguage &GetLanguage()