You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.6 KiB
89 lines
2.6 KiB
/*
|
|
Copyright (c) 2013 Martin Sustrik 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 "lb.h"
|
|
|
|
#include "../../utils/err.h"
|
|
#include "../../utils/cont.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
void nn_lb_init (struct nn_lb *self)
|
|
{
|
|
nn_priolist_init (&self->priolist);
|
|
}
|
|
|
|
void nn_lb_term (struct nn_lb *self)
|
|
{
|
|
nn_priolist_term (&self->priolist);
|
|
}
|
|
|
|
void nn_lb_add (struct nn_lb *self, struct nn_lb_data *data,
|
|
struct nn_pipe *pipe, int priority)
|
|
{
|
|
nn_priolist_add (&self->priolist, &data->priodata, pipe, priority);
|
|
}
|
|
|
|
void nn_lb_rm (struct nn_lb *self, struct nn_lb_data *data)
|
|
{
|
|
nn_priolist_rm (&self->priolist, &data->priodata);
|
|
}
|
|
|
|
void nn_lb_out(struct nn_lb *self, struct nn_lb_data *data)
|
|
{
|
|
//printf("nn_lb_out.%p data.%p: call activate\n",self,data);
|
|
nn_priolist_activate(&self->priolist,&data->priodata);
|
|
}
|
|
|
|
int nn_lb_can_send (struct nn_lb *self)
|
|
{
|
|
return nn_priolist_is_active (&self->priolist);
|
|
}
|
|
|
|
int nn_lb_get_priority (struct nn_lb *self)
|
|
{
|
|
return nn_priolist_get_priority (&self->priolist);
|
|
}
|
|
|
|
int nn_lb_send (struct nn_lb *self, struct nn_msg *msg, struct nn_pipe **to)
|
|
{
|
|
int rc;
|
|
struct nn_pipe *pipe;
|
|
|
|
/* Pipe is NULL only when there are no avialable pipes. */
|
|
pipe = nn_priolist_getpipe (&self->priolist);
|
|
if (nn_slow (!pipe))
|
|
return -EAGAIN;
|
|
|
|
/* Send the messsage. */
|
|
rc = nn_pipe_send (pipe, msg);
|
|
errnum_assert (rc >= 0, -rc);
|
|
|
|
/* Move to the next pipe. */
|
|
nn_priolist_advance (&self->priolist, rc & NN_PIPE_RELEASE);
|
|
|
|
if (to != NULL)
|
|
*to = pipe;
|
|
|
|
return rc & ~NN_PIPE_RELEASE;
|
|
}
|
|
|
|
|