| /* |
| Copyright (c) 2012-2013 250bpm s.r.o. 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 "cinproc.h" |
| #include "binproc.h" |
| #include "ins.h" |
| |
| #include "../../utils/err.h" |
| #include "../../utils/cont.h" |
| #include "../../utils/alloc.h" |
| |
| #include <stddef.h> |
| |
| #define NN_CINPROC_STATE_IDLE 1 |
| #define NN_CINPROC_STATE_DISCONNECTED 2 |
| #define NN_CINPROC_STATE_ACTIVE 3 |
| #define NN_CINPROC_STATE_STOPPING 4 |
| |
| #define NN_CINPROC_ACTION_CONNECT 1 |
| |
| #define NN_CINPROC_SRC_SINPROC 1 |
| |
| /* Implementation of nn_epbase callback interface. */ |
| static void nn_cinproc_stop (struct nn_epbase *self); |
| static void nn_cinproc_destroy (struct nn_epbase *self); |
| static const struct nn_epbase_vfptr nn_cinproc_vfptr = { |
| nn_cinproc_stop, |
| nn_cinproc_destroy |
| }; |
| |
| /* Private functions. */ |
| static void nn_cinproc_handler (struct nn_fsm *self, int src, int type, |
| void *srcptr); |
| static void nn_cinproc_shutdown (struct nn_fsm *self, int src, int type, |
| void *srcptr); |
| static void nn_cinproc_connect (struct nn_ins_item *self, |
| struct nn_ins_item *peer); |
| |
| int nn_cinproc_create (void *hint, struct nn_epbase **epbase) |
| { |
| struct nn_cinproc *self; |
| |
| self = nn_alloc (sizeof (struct nn_cinproc), "cinproc"); |
| alloc_assert (self); |
| |
| nn_ins_item_init (&self->item, &nn_cinproc_vfptr, hint); |
| nn_fsm_init_root (&self->fsm, nn_cinproc_handler, nn_cinproc_shutdown, |
| nn_epbase_getctx (&self->item.epbase)); |
| self->state = NN_CINPROC_STATE_IDLE; |
| nn_sinproc_init (&self->sinproc, NN_CINPROC_SRC_SINPROC, |
| &self->item.epbase, &self->fsm); |
| |
| /* Start the state machine. */ |
| nn_fsm_start (&self->fsm); |
| |
| /* Register the inproc endpoint into a global repository. */ |
| nn_ins_connect (&self->item, nn_cinproc_connect); |
| |
| *epbase = &self->item.epbase; |
| return 0; |
| } |
| |
| static void nn_cinproc_stop (struct nn_epbase *self) |
| { |
| struct nn_cinproc *cinproc; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, item.epbase); |
| |
| nn_fsm_stop (&cinproc->fsm); |
| } |
| |
| static void nn_cinproc_destroy (struct nn_epbase *self) |
| { |
| struct nn_cinproc *cinproc; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, item.epbase); |
| |
| nn_sinproc_term (&cinproc->sinproc); |
| nn_fsm_term (&cinproc->fsm); |
| nn_ins_item_term (&cinproc->item); |
| |
| nn_free (cinproc); |
| } |
| |
| static void nn_cinproc_connect (struct nn_ins_item *self, |
| struct nn_ins_item *peer) |
| { |
| struct nn_cinproc *cinproc; |
| struct nn_binproc *binproc; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, item); |
| binproc = nn_cont (peer, struct nn_binproc, item); |
| |
| nn_assert (cinproc->state == NN_CINPROC_STATE_DISCONNECTED); |
| nn_sinproc_connect (&cinproc->sinproc, &binproc->fsm); |
| nn_fsm_action (&cinproc->fsm, NN_CINPROC_ACTION_CONNECT); |
| } |
| |
| static void nn_cinproc_shutdown (struct nn_fsm *self, int src, int type, |
| void *srcptr) |
| { |
| struct nn_cinproc *cinproc; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, fsm); |
| |
| if (nn_slow (src == NN_FSM_ACTION && type == NN_FSM_STOP)) { |
| |
| /* First, unregister the endpoint from the global repository of inproc |
| endpoints. This way, new connections cannot be created anymore. */ |
| nn_ins_disconnect (&cinproc->item); |
| |
| /* Stop the existing connection. */ |
| nn_sinproc_stop (&cinproc->sinproc); |
| cinproc->state = NN_CINPROC_STATE_STOPPING; |
| } |
| if (nn_slow (cinproc->state == NN_CINPROC_STATE_STOPPING)) { |
| if (!nn_sinproc_isidle (&cinproc->sinproc)) |
| return; |
| cinproc->state = NN_CINPROC_STATE_IDLE; |
| nn_fsm_stopped_noevent (&cinproc->fsm); |
| nn_epbase_stopped (&cinproc->item.epbase); |
| return; |
| } |
| |
| nn_fsm_bad_state(cinproc->state, src, type); |
| } |
| |
| static void nn_cinproc_handler (struct nn_fsm *self, int src, int type, |
| void *srcptr) |
| { |
| struct nn_cinproc *cinproc; |
| struct nn_sinproc *sinproc; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, fsm); |
| |
| |
| switch (cinproc->state) { |
| |
| /******************************************************************************/ |
| /* IDLE state. */ |
| /******************************************************************************/ |
| case NN_CINPROC_STATE_IDLE: |
| switch (src) { |
| |
| case NN_FSM_ACTION: |
| switch (type) { |
| case NN_FSM_START: |
| cinproc->state = NN_CINPROC_STATE_DISCONNECTED; |
| return; |
| default: |
| nn_fsm_bad_action (cinproc->state, src, type); |
| } |
| |
| default: |
| nn_fsm_bad_source (cinproc->state, src, type); |
| } |
| |
| /******************************************************************************/ |
| /* DISCONNECTED state. */ |
| /******************************************************************************/ |
| case NN_CINPROC_STATE_DISCONNECTED: |
| switch (src) { |
| |
| case NN_FSM_ACTION: |
| switch (type) { |
| case NN_CINPROC_ACTION_CONNECT: |
| cinproc->state = NN_CINPROC_STATE_ACTIVE; |
| return; |
| default: |
| nn_fsm_bad_action (cinproc->state, src, type); |
| } |
| |
| case NN_SINPROC_SRC_PEER: |
| sinproc = (struct nn_sinproc*) srcptr; |
| switch (type) { |
| case NN_SINPROC_CONNECT: |
| nn_sinproc_accept (&cinproc->sinproc, sinproc); |
| cinproc->state = NN_CINPROC_STATE_ACTIVE; |
| return; |
| default: |
| nn_fsm_bad_action (cinproc->state, src, type); |
| } |
| |
| default: |
| nn_fsm_bad_source (cinproc->state, src, type); |
| } |
| |
| /******************************************************************************/ |
| /* ACTIVE state. */ |
| /******************************************************************************/ |
| case NN_CINPROC_STATE_ACTIVE: |
| nn_fsm_bad_source (cinproc->state, src, type); |
| |
| /******************************************************************************/ |
| /* Invalid state. */ |
| /******************************************************************************/ |
| default: |
| nn_fsm_bad_state (cinproc->state, src, type); |
| } |
| } |
| |