fixes #334 Separate context for state machines from sockets

This provides context support for REQ and REP sockets.
More discussion around this is in the issue itself.

Optionally we would like to extend this to the surveyor pattern.

Note that we specifically do not support pollable descriptors
for non-default contexts, and the results of using file descriptors
for polling (NNG_OPT_SENDFD and NNG_OPT_RECVFD) is undefined.

In the future, it might be nice to figure out how to factor in
optional use of a message queue for users who want more buffering,
but we think there is little need for this with cooked mode.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/core/defs.h b/src/core/defs.h
index f64d3df7..1d656bb2 100644
--- a/src/core/defs.h
+++ b/src/core/defs.h
@@ -41,6 +41,7 @@ typedef struct nng_notify nni_notify;
 
 // These are our own names.
 typedef struct nni_socket           nni_sock;
+typedef struct nni_ctx              nni_ctx;
 typedef struct nni_ep               nni_ep;
 typedef struct nni_pipe             nni_pipe;
 typedef struct nni_tran             nni_tran;
@@ -49,6 +50,8 @@ typedef struct nni_tran_ep_option   nni_tran_ep_option;
 typedef struct nni_tran_pipe        nni_tran_pipe;
 typedef struct nni_tran_pipe_option nni_tran_pipe_option;
 
+typedef struct nni_proto_ctx_option  nni_proto_ctx_option;
+typedef struct nni_proto_ctx_ops     nni_proto_ctx_ops;
 typedef struct nni_proto_sock_ops    nni_proto_sock_ops;
 typedef struct nni_proto_pipe_ops    nni_proto_pipe_ops;
 typedef struct nni_proto_sock_option nni_proto_sock_option;