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f4grx
NuttX RTOS
Commits
0e447ff9
Commit
0e447ff9
authored
11 years ago
by
Gregory Nutt
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Oops here is a file that I forget to add before a recent commit
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net/net_allocroute.c
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0e447ff9
/****************************************************************************
* net/net_allocroute.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include
<nuttx/config.h>
#include
<stdint.h>
#include
<errno.h>
#include
<arch/irq.h>
#include
"net_internal.h"
#include
"net_route.h"
#if defined(CONFIG_NET) && defined(CONFIG_NET_ROUTE)
/****************************************************************************
* Public Data
****************************************************************************/
/* This is the routing table */
sq_queue_t
g_routes
;
/****************************************************************************
* Private Data
****************************************************************************/
/* This is a list of free routing table entries */
static
sq_queue_t
g_freeroutes
;
/* This is an array of pre-allocated network routes */
static
struct
net_route_s
g_preallocroutes
[
CONFIG_NET_MAXROUTES
];
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: net_initroute
*
* Description:
* Initialize to the routing table
*
* Parameters:
* None
*
* Returned Value:
* None
*
* Assumptions:
* Called early in initialization so that no special protection is needed.
*
****************************************************************************/
void
net_initroute
(
void
)
{
int
i
;
/* Initialize the routing table and the free list */
sq_init
(
&
g_routes
);
sq_init
(
&
g_freeroutes
);
/* All all of the pre-allocated routing table entries to a free list */
for
(
i
=
0
;
i
<
CONFIG_NET_MAXROUTES
;
i
++
)
{
sq_addlast
((
FAR
sq_entry_t
*
)
&
g_preallocroutes
[
i
],
(
FAR
sq_queue_t
*
)
&
g_freeroutes
);
}
}
/****************************************************************************
* Function: net_allocroute
*
* Description:
* Allocate one route by removing it from the free list
*
* Parameters:
* None
*
* Returned Value:
* On success, a pointer to the newly allocated route table entry is
* returned; NULL is returned on failure.
*
****************************************************************************/
FAR
struct
net_route_s
*
net_allocroute
(
void
)
{
FAR
struct
net_route_s
*
route
;
uip_lock_t
save
;
/* Get exclusive address to the networking data structures */
save
=
uip_lock
();
/* Then add the new entry to the table */
route
=
(
FAR
struct
net_route_s
*
)
sq_remfirst
((
FAR
sq_queue_t
*
)
&
g_freeroutes
);
uip_unlock
(
save
);
return
route
;
}
/****************************************************************************
* Function: net_allocroute
*
* Description:
* Free one route by adding it from the free list
*
* Parameters:
* route - The route to be freed
*
* Returned Value:
* None
*
****************************************************************************/
void
net_freeroute
(
FAR
struct
net_route_s
*
route
)
{
uip_lock_t
save
;
DEBUGASSERT
(
route
);
/* Get exclusive address to the networking data structures */
save
=
uip_lock
();
/* Then add the new entry to the table */
sq_addlast
((
FAR
sq_entry_t
*
)
route
,
(
FAR
sq_queue_t
*
)
&
g_freeroutes
);
uip_unlock
(
save
);
}
#endif
/* CONFIG_NET && CONFIG_NET_ROUTE */
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