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Diffstat (limited to 'src/protocol/pubsub0/pub.c')
-rw-r--r--src/protocol/pubsub0/pub.c383
1 files changed, 0 insertions, 383 deletions
diff --git a/src/protocol/pubsub0/pub.c b/src/protocol/pubsub0/pub.c
deleted file mode 100644
index e3d4f16a..00000000
--- a/src/protocol/pubsub0/pub.c
+++ /dev/null
@@ -1,383 +0,0 @@
-//
-// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
-// Copyright 2018 Capitar IT Group BV <info@capitar.com>
-//
-// 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 <string.h>
-
-#include "core/nng_impl.h"
-#include "nng/protocol/pubsub0/pub.h"
-
-// Publish protocol. The PUB protocol simply sends messages out, as
-// a broadcast. It has nothing more sophisticated because it does not
-// perform sender-side filtering. Its best effort delivery, so anything
-// that can't receive the message won't get one.
-
-#ifndef NNI_PROTO_SUB_V0
-#define NNI_PROTO_SUB_V0 NNI_PROTO(2, 1)
-#endif
-
-#ifndef NNI_PROTO_PUB_V0
-#define NNI_PROTO_PUB_V0 NNI_PROTO(2, 0)
-#endif
-
-typedef struct pub0_pipe pub0_pipe;
-typedef struct pub0_sock pub0_sock;
-
-static void pub0_pipe_recv_cb(void *);
-static void pub0_pipe_send_cb(void *);
-static void pub0_sock_fini(void *);
-static void pub0_pipe_fini(void *);
-
-// pub0_sock is our per-socket protocol private structure.
-struct pub0_sock {
- nni_list pipes;
- nni_mtx mtx;
- bool closed;
- size_t sendbuf;
- nni_pollable *sendable;
-};
-
-// pub0_pipe is our per-pipe protocol private structure.
-struct pub0_pipe {
- nni_pipe * pipe;
- pub0_sock * pub;
- nni_lmq sendq;
- bool closed;
- bool busy;
- nni_aio * aio_send;
- nni_aio * aio_recv;
- nni_list_node node;
-};
-
-static void
-pub0_sock_fini(void *arg)
-{
- pub0_sock *s = arg;
-
- nni_pollable_free(s->sendable);
- nni_mtx_fini(&s->mtx);
-}
-
-static int
-pub0_sock_init(void *arg, nni_sock *nsock)
-{
- pub0_sock *sock = arg;
- int rv;
- NNI_ARG_UNUSED(nsock);
-
- if ((rv = nni_pollable_alloc(&sock->sendable)) != 0) {
- return (rv);
- }
- nni_mtx_init(&sock->mtx);
- NNI_LIST_INIT(&sock->pipes, pub0_pipe, node);
- sock->sendbuf = 16; // fairly arbitrary
- return (0);
-}
-
-static void
-pub0_sock_open(void *arg)
-{
- NNI_ARG_UNUSED(arg);
-}
-
-static void
-pub0_sock_close(void *arg)
-{
- NNI_ARG_UNUSED(arg);
-}
-
-static void
-pub0_pipe_stop(void *arg)
-{
- pub0_pipe *p = arg;
-
- nni_aio_stop(p->aio_send);
- nni_aio_stop(p->aio_recv);
-}
-
-static void
-pub0_pipe_fini(void *arg)
-{
- pub0_pipe *p = arg;
-
- nni_aio_free(p->aio_send);
- nni_aio_free(p->aio_recv);
- nni_lmq_fini(&p->sendq);
-}
-
-static int
-pub0_pipe_init(void *arg, nni_pipe *pipe, void *s)
-{
- pub0_pipe *p = arg;
- pub0_sock *sock = s;
- int rv;
- size_t len;
-
- nni_mtx_lock(&sock->mtx);
- len = sock->sendbuf;
- nni_mtx_unlock(&sock->mtx);
-
- // XXX: consider making this depth tunable
- if (((rv = nni_lmq_init(&p->sendq, len)) != 0) ||
- ((rv = nni_aio_alloc(&p->aio_send, pub0_pipe_send_cb, p)) != 0) ||
- ((rv = nni_aio_alloc(&p->aio_recv, pub0_pipe_recv_cb, p)) != 0)) {
-
- pub0_pipe_fini(p);
- return (rv);
- }
-
- p->busy = false;
- p->pipe = pipe;
- p->pub = s;
- return (0);
-}
-
-static int
-pub0_pipe_start(void *arg)
-{
- pub0_pipe *p = arg;
- pub0_sock *sock = p->pub;
-
- if (nni_pipe_peer(p->pipe) != NNI_PROTO_SUB_V0) {
- return (NNG_EPROTO);
- }
- nni_mtx_lock(&sock->mtx);
- nni_list_append(&sock->pipes, p);
- nni_mtx_unlock(&sock->mtx);
-
- // Start the receiver.
- nni_pipe_recv(p->pipe, p->aio_recv);
-
- return (0);
-}
-
-static void
-pub0_pipe_close(void *arg)
-{
- pub0_pipe *p = arg;
- pub0_sock *sock = p->pub;
-
- nni_aio_close(p->aio_send);
- nni_aio_close(p->aio_recv);
-
- nni_mtx_lock(&sock->mtx);
- p->closed = true;
- nni_lmq_flush(&p->sendq);
-
- if (nni_list_active(&sock->pipes, p)) {
- nni_list_remove(&sock->pipes, p);
- }
- nni_mtx_unlock(&sock->mtx);
-}
-
-static void
-pub0_pipe_recv_cb(void *arg)
-{
- pub0_pipe *p = arg;
-
- // We should never receive a message -- the only valid reason for us to
- // be here is on pipe close.
- if (nni_aio_result(p->aio_recv) == 0) {
- nni_msg_free(nni_aio_get_msg(p->aio_recv));
- }
- nni_pipe_close(p->pipe);
-}
-
-static void
-pub0_pipe_send_cb(void *arg)
-{
- pub0_pipe *p = arg;
- pub0_sock *sock = p->pub;
- nni_msg * msg;
-
- if (nni_aio_result(p->aio_send) != 0) {
- nni_msg_free(nni_aio_get_msg(p->aio_send));
- nni_aio_set_msg(p->aio_send, NULL);
- nni_pipe_close(p->pipe);
- return;
- }
-
- nni_mtx_lock(&sock->mtx);
- if (p->closed) {
- nni_mtx_unlock(&sock->mtx);
- return;
- }
- if (nni_lmq_getq(&p->sendq, &msg) == 0) {
- nni_aio_set_msg(p->aio_send, msg);
- nni_pipe_send(p->pipe, p->aio_send);
- } else {
- p->busy = false;
- }
- nni_mtx_unlock(&sock->mtx);
-}
-
-static void
-pub0_sock_recv(void *arg, nni_aio *aio)
-{
- NNI_ARG_UNUSED(arg);
- if (nni_aio_begin(aio) == 0) {
- nni_aio_finish_error(aio, NNG_ENOTSUP);
- }
-}
-
-static void
-pub0_sock_send(void *arg, nni_aio *aio)
-{
- pub0_sock *sock = arg;
- pub0_pipe *p;
- nng_msg * msg;
- size_t len;
-
- msg = nni_aio_get_msg(aio);
- len = nni_msg_len(msg);
- nni_mtx_lock(&sock->mtx);
- NNI_LIST_FOREACH (&sock->pipes, p) {
-
- nni_msg_clone(msg);
- if (p->busy) {
- if (nni_lmq_full(&p->sendq)) {
- // Make space for the new message.
- nni_msg *old;
- (void) nni_lmq_getq(&p->sendq, &old);
- nni_msg_free(old);
- }
- nni_lmq_putq(&p->sendq, msg);
- } else {
- p->busy = true;
- nni_aio_set_msg(p->aio_send, msg);
- nni_pipe_send(p->pipe, p->aio_send);
- }
- }
- nni_mtx_unlock(&sock->mtx);
- nng_msg_free(msg);
- nni_aio_finish(aio, 0, len);
-}
-
-static int
-pub0_sock_get_sendfd(void *arg, void *buf, size_t *szp, nni_type t)
-{
- pub0_sock *sock = arg;
- int fd;
- int rv;
- nni_mtx_lock(&sock->mtx);
- // PUB sockets are *always* writable.
- nni_pollable_raise(sock->sendable);
- rv = nni_pollable_getfd(sock->sendable, &fd);
- nni_mtx_unlock(&sock->mtx);
-
- if (rv == 0) {
- rv = nni_copyout_int(fd, buf, szp, t);
- }
- return (rv);
-}
-
-static int
-pub0_sock_set_sendbuf(void *arg, const void *buf, size_t sz, nni_type t)
-{
- pub0_sock *sock = arg;
- pub0_pipe *p;
- int val;
- int rv;
-
- if ((rv = nni_copyin_int(&val, buf, sz, 1, 8192, t)) != 0) {
- return (rv);
- }
-
- nni_mtx_lock(&sock->mtx);
- sock->sendbuf = (size_t) val;
- NNI_LIST_FOREACH (&sock->pipes, p) {
- // If we fail part way thru (should only be ENOMEM), we
- // stop short. The others would likely fail for ENOMEM as
- // well anyway. There is a weird effect here where the
- // buffers may have been set for *some* of the pipes, but
- // we have no way to correct partial failure.
- if ((rv = nni_lmq_resize(&p->sendq, (size_t) val)) != 0) {
- break;
- }
- }
- nni_mtx_unlock(&sock->mtx);
- return (rv);
-}
-
-static int
-pub0_sock_get_sendbuf(void *arg, void *buf, size_t *szp, nni_type t)
-{
- pub0_sock *sock = arg;
- int val;
- nni_mtx_lock(&sock->mtx);
- val = (int) sock->sendbuf;
- nni_mtx_unlock(&sock->mtx);
- return (nni_copyout_int(val, buf, szp, t));
-}
-
-static nni_proto_pipe_ops pub0_pipe_ops = {
- .pipe_size = sizeof(pub0_pipe),
- .pipe_init = pub0_pipe_init,
- .pipe_fini = pub0_pipe_fini,
- .pipe_start = pub0_pipe_start,
- .pipe_close = pub0_pipe_close,
- .pipe_stop = pub0_pipe_stop,
-};
-
-static nni_option pub0_sock_options[] = {
- // terminate list
- {
- .o_name = NNG_OPT_SENDFD,
- .o_get = pub0_sock_get_sendfd,
- },
- {
- .o_name = NNG_OPT_SENDBUF,
- .o_get = pub0_sock_get_sendbuf,
- .o_set = pub0_sock_set_sendbuf,
- },
- {
- .o_name = NULL,
- },
-};
-
-static nni_proto_sock_ops pub0_sock_ops = {
- .sock_size = sizeof(pub0_sock),
- .sock_init = pub0_sock_init,
- .sock_fini = pub0_sock_fini,
- .sock_open = pub0_sock_open,
- .sock_close = pub0_sock_close,
- .sock_send = pub0_sock_send,
- .sock_recv = pub0_sock_recv,
- .sock_options = pub0_sock_options,
-};
-
-static nni_proto pub0_proto = {
- .proto_version = NNI_PROTOCOL_VERSION,
- .proto_self = { NNI_PROTO_PUB_V0, "pub" },
- .proto_peer = { NNI_PROTO_SUB_V0, "sub" },
- .proto_flags = NNI_PROTO_FLAG_SND,
- .proto_sock_ops = &pub0_sock_ops,
- .proto_pipe_ops = &pub0_pipe_ops,
-};
-
-static nni_proto pub0_proto_raw = {
- .proto_version = NNI_PROTOCOL_VERSION,
- .proto_self = { NNI_PROTO_PUB_V0, "pub" },
- .proto_peer = { NNI_PROTO_SUB_V0, "sub" },
- .proto_flags = NNI_PROTO_FLAG_SND | NNI_PROTO_FLAG_RAW,
- .proto_sock_ops = &pub0_sock_ops,
- .proto_pipe_ops = &pub0_pipe_ops,
-};
-
-int
-nng_pub0_open(nng_socket *sidp)
-{
- return (nni_proto_open(sidp, &pub0_proto));
-}
-
-int
-nng_pub0_open_raw(nng_socket *sidp)
-{
- return (nni_proto_open(sidp, &pub0_proto_raw));
-}
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