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//
// Copyright 2017 Garrett D'Amore <garrett@damore.org>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include <stdlib.h>
#include <string.h>
#include "core/nng_impl.h"
// Pull protocol. The PULL protocol is the "read" side of a pipeline.
typedef struct nni_pull_pipe nni_pull_pipe;
typedef struct nni_pull_sock nni_pull_sock;
// An nni_pull_sock is our per-socket protocol private structure.
struct nni_pull_sock {
nni_msgq * urq;
int raw;
};
// An nni_pull_pipe is our per-pipe protocol private structure.
struct nni_pull_pipe {
nni_pipe * pipe;
nni_pull_sock * pull;
};
static int
nni_pull_sock_init(void **pullp, nni_sock *sock)
{
nni_pull_sock *pull;
if ((pull = NNI_ALLOC_STRUCT(pull)) == NULL) {
return (NNG_ENOMEM);
}
pull->raw = 0;
pull->urq = nni_sock_recvq(sock);
*pullp = pull;
nni_sock_senderr(sock, NNG_ENOTSUP);
return (0);
}
static void
nni_pull_sock_fini(void *arg)
{
nni_pull_sock *pull = arg;
if (pull != NULL) {
NNI_FREE_STRUCT(pull);
}
}
static int
nni_pull_pipe_init(void **ppp, nni_pipe *pipe, void *psock)
{
nni_pull_pipe *pp;
if ((pp = NNI_ALLOC_STRUCT(pp)) == NULL) {
return (NNG_ENOMEM);
}
pp->pipe = pipe;
pp->pull = psock;
*ppp = pp;
return (0);
}
static void
nni_pull_pipe_fini(void *arg)
{
nni_pull_pipe *pp = arg;
if (pp != NULL) {
NNI_FREE_STRUCT(pp);
}
}
static void
nni_pull_pipe_recv(void *arg)
{
nni_pull_pipe *pp = arg;
nni_pull_sock *pull = pp->pull;
nni_msg *msg;
for (;;) {
if (nni_pipe_recv(pp->pipe, &msg) != 0) {
break;
}
if (nni_msgq_put(pull->urq, msg) != 0) {
nni_msg_free(msg);
break;
}
}
nni_pipe_close(pp->pipe);
}
static int
nni_pull_sock_setopt(void *arg, int opt, const void *buf, size_t sz)
{
nni_pull_sock *pull = arg;
int rv;
switch (opt) {
case NNG_OPT_RAW:
rv = nni_setopt_int(&pull->raw, buf, sz, 0, 1);
break;
default:
rv = NNG_ENOTSUP;
}
return (rv);
}
static int
nni_pull_sock_getopt(void *arg, int opt, void *buf, size_t *szp)
{
nni_pull_sock *pull = arg;
int rv;
switch (opt) {
case NNG_OPT_RAW:
rv = nni_getopt_int(&pull->raw, buf, szp);
break;
default:
rv = NNG_ENOTSUP;
}
return (rv);
}
// This is the global protocol structure -- our linkage to the core.
// This should be the only global non-static symbol in this file.
static nni_proto_pipe_ops nni_pull_pipe_ops = {
.pipe_init = nni_pull_pipe_init,
.pipe_fini = nni_pull_pipe_fini,
.pipe_worker = { nni_pull_pipe_recv },
};
static nni_proto_sock_ops nni_pull_sock_ops = {
.sock_init = nni_pull_sock_init,
.sock_fini = nni_pull_sock_fini,
.sock_setopt = nni_pull_sock_setopt,
.sock_getopt = nni_pull_sock_getopt,
};
nni_proto nni_pull_proto = {
.proto_self = NNG_PROTO_PULL,
.proto_peer = NNG_PROTO_PUSH,
.proto_name = "pull",
.proto_pipe_ops = &nni_pull_pipe_ops,
.proto_sock_ops = &nni_pull_sock_ops,
};
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