| /* |
| Copyright (c) 2012-2014 Martin Sustrik All rights reserved. |
| Copyright (c) 2013 GoPivotal, Inc. All rights reserved. |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), |
| to deal in the Software without restriction, including without limitation |
| the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| and/or sell copies of the Software, and to permit persons to whom |
| the Software is furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included |
| in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| IN THE SOFTWARE. |
| */ |
| |
| #include "xpull.h" |
| |
| #include "../../nn.h" |
| #include "../../pipeline.h" |
| |
| #include "../utils/fq.h" |
| |
| #include "../../utils/err.h" |
| #include "../../utils/cont.h" |
| #include "../../utils/fast.h" |
| #include "../../utils/alloc.h" |
| #include "../../utils/list.h" |
| #include "../../utils/attr.h" |
| |
| struct nn_xpull_data { |
| struct nn_fq_data fq; |
| }; |
| |
| struct nn_xpull { |
| struct nn_sockbase sockbase; |
| struct nn_fq fq; |
| }; |
| |
| /* Private functions. */ |
| static void nn_xpull_init (struct nn_xpull *self, |
| const struct nn_sockbase_vfptr *vfptr, void *hint); |
| static void nn_xpull_term (struct nn_xpull *self); |
| |
| /* Implementation of nn_sockbase's virtual functions. */ |
| static void nn_xpull_destroy (struct nn_sockbase *self); |
| static int nn_xpull_add (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static void nn_xpull_rm (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static void nn_xpull_in (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static void nn_xpull_out (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static int nn_xpull_events (struct nn_sockbase *self); |
| static int nn_xpull_recv (struct nn_sockbase *self, struct nn_msg *msg); |
| static int nn_xpull_setopt (struct nn_sockbase *self, int level, int option, |
| const void *optval, size_t optvallen); |
| static int nn_xpull_getopt (struct nn_sockbase *self, int level, int option, |
| void *optval, size_t *optvallen); |
| static const struct nn_sockbase_vfptr nn_xpull_sockbase_vfptr = { |
| NULL, |
| nn_xpull_destroy, |
| nn_xpull_add, |
| nn_xpull_rm, |
| nn_xpull_in, |
| nn_xpull_out, |
| nn_xpull_events, |
| NULL, |
| nn_xpull_recv, |
| nn_xpull_setopt, |
| nn_xpull_getopt |
| }; |
| |
| static void nn_xpull_init (struct nn_xpull *self, |
| const struct nn_sockbase_vfptr *vfptr, void *hint) |
| { |
| nn_sockbase_init (&self->sockbase, vfptr, hint); |
| nn_fq_init (&self->fq); |
| } |
| |
| static void nn_xpull_term (struct nn_xpull *self) |
| { |
| nn_fq_term (&self->fq); |
| nn_sockbase_term (&self->sockbase); |
| } |
| |
| void nn_xpull_destroy (struct nn_sockbase *self) |
| { |
| struct nn_xpull *xpull; |
| |
| xpull = nn_cont (self, struct nn_xpull, sockbase); |
| |
| nn_xpull_term (xpull); |
| nn_free (xpull); |
| } |
| |
| static int nn_xpull_add (struct nn_sockbase *self, struct nn_pipe *pipe) |
| { |
| struct nn_xpull *xpull; |
| struct nn_xpull_data *data; |
| int rcvprio; |
| size_t sz; |
| |
| xpull = nn_cont (self, struct nn_xpull, sockbase); |
| |
| sz = sizeof (rcvprio); |
| nn_pipe_getopt (pipe, NN_SOL_SOCKET, NN_RCVPRIO, &rcvprio, &sz); |
| nn_assert (sz == sizeof (rcvprio)); |
| nn_assert (rcvprio >= 1 && rcvprio <= 16); |
| |
| data = nn_alloc (sizeof (struct nn_xpull_data), "pipe data (pull)"); |
| alloc_assert (data); |
| nn_pipe_setdata (pipe, data); |
| nn_fq_add (&xpull->fq, &data->fq, pipe, rcvprio); |
| |
| return 0; |
| } |
| |
| static void nn_xpull_rm (struct nn_sockbase *self, struct nn_pipe *pipe) |
| { |
| struct nn_xpull *xpull; |
| struct nn_xpull_data *data; |
| |
| xpull = nn_cont (self, struct nn_xpull, sockbase); |
| data = nn_pipe_getdata (pipe); |
| nn_fq_rm (&xpull->fq, &data->fq); |
| nn_free (data); |
| } |
| |
| static void nn_xpull_in (NN_UNUSED struct nn_sockbase *self, |
| struct nn_pipe *pipe) |
| { |
| struct nn_xpull *xpull; |
| struct nn_xpull_data *data; |
| |
| xpull = nn_cont (self, struct nn_xpull, sockbase); |
| data = nn_pipe_getdata (pipe); |
| nn_fq_in (&xpull->fq, &data->fq); |
| } |
| |
| static void nn_xpull_out (NN_UNUSED struct nn_sockbase *self, |
| NN_UNUSED struct nn_pipe *pipe) |
| { |
| /* We are not going to send any messages, so there's no point is |
| maintaining a list of pipes ready for sending. */ |
| } |
| |
| static int nn_xpull_events (struct nn_sockbase *self) |
| { |
| return nn_fq_can_recv (&nn_cont (self, struct nn_xpull, sockbase)->fq) ? |
| NN_SOCKBASE_EVENT_IN : 0; |
| } |
| |
| static int nn_xpull_recv (struct nn_sockbase *self, struct nn_msg *msg) |
| { |
| int rc; |
| |
| rc = nn_fq_recv (&nn_cont (self, struct nn_xpull, sockbase)->fq, |
| msg, NULL); |
| |
| /* Discard NN_PIPEBASE_PARSED flag. */ |
| return rc < 0 ? rc : 0; |
| } |
| |
| static int nn_xpull_setopt (NN_UNUSED struct nn_sockbase *self, |
| NN_UNUSED int level, NN_UNUSED int option, |
| NN_UNUSED const void *optval, NN_UNUSED size_t optvallen) |
| { |
| return -ENOPROTOOPT; |
| } |
| |
| static int nn_xpull_getopt (NN_UNUSED struct nn_sockbase *self, |
| NN_UNUSED int level, NN_UNUSED int option, |
| NN_UNUSED void *optval, NN_UNUSED size_t *optvallen) |
| { |
| return -ENOPROTOOPT; |
| } |
| |
| int nn_xpull_create (void *hint, struct nn_sockbase **sockbase) |
| { |
| struct nn_xpull *self; |
| |
| self = nn_alloc (sizeof (struct nn_xpull), "socket (pull)"); |
| alloc_assert (self); |
| nn_xpull_init (self, &nn_xpull_sockbase_vfptr, hint); |
| *sockbase = &self->sockbase; |
| |
| return 0; |
| } |
| |
| int nn_xpull_ispeer (int socktype) |
| { |
| return socktype == NN_PUSH ? 1 : 0; |
| } |
| |
| static struct nn_socktype nn_xpull_socktype_struct = { |
| AF_SP_RAW, |
| NN_PULL, |
| NN_SOCKTYPE_FLAG_NOSEND, |
| nn_xpull_create, |
| nn_xpull_ispeer, |
| NN_LIST_ITEM_INITIALIZER |
| }; |
| |
| struct nn_socktype *nn_xpull_socktype = &nn_xpull_socktype_struct; |
| |