first comit

venv/lib/python3.10/site-packages/zmq/backend/cython/checkrc.pxd

@@ -0,0 +1,29 @@
+from cpython cimport PyErr_CheckSignals
+from libc.errno cimport EAGAIN, EINTR
+
+from .libzmq cimport ZMQ_ETERM, zmq_errno
+
+
+cdef inline int _check_rc(int rc, bint error_without_errno=True) except -1:
+    """internal utility for checking zmq return condition
+
+    and raising the appropriate Exception class
+    """
+    cdef int errno = zmq_errno()
+    PyErr_CheckSignals()
+    if errno == 0 and not error_without_errno:
+        return 0
+    if rc == -1: # if rc < -1, it's a bug in libzmq. Should we warn?
+        if errno == EINTR:
+            from zmq.error import InterruptedSystemCall
+            raise InterruptedSystemCall(errno)
+        elif errno == EAGAIN:
+            from zmq.error import Again
+            raise Again(errno)
+        elif errno == ZMQ_ETERM:
+            from zmq.error import ContextTerminated
+            raise ContextTerminated(errno)
+        else:
+            from zmq.error import ZMQError
+            raise ZMQError(errno)
+    return 0