diff options
Diffstat (limited to 'nuttx/net/tcp/tcp_readahead.c')
-rw-r--r-- | nuttx/net/tcp/tcp_readahead.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/nuttx/net/tcp/tcp_readahead.c b/nuttx/net/tcp/tcp_readahead.c deleted file mode 100644 index 059abbc5c..000000000 --- a/nuttx/net/tcp/tcp_readahead.c +++ /dev/null @@ -1,143 +0,0 @@ -/**************************************************************************** - * net/tcp/tcp_readahead.c - * - * Copyright (C) 2007-2009, 2013-2014 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/net/netconfig.h> -#if defined(CONFIG_NET) && defined(CONFIG_NET_TCP) && defined(CONFIG_NET_TCP_READAHEAD) - -#include <queue.h> -#include <debug.h> - -#include <nuttx/net/uip.h> - -#include "uip/uip.h" - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/* Package all globals used by this logic into a structure */ - -struct readahead_s -{ - /* This is the list of available write buffers */ - - sq_queue_t freebuffers; - - /* These are the pre-allocated write buffers */ - - struct uip_readahead_s buffers[CONFIG_NET_NTCP_READAHEAD_BUFFERS]; -}; - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/* This is the state of the global read-ahead resource */ - -static struct readahead_s g_readahead; - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Function: uip_tcpreadahead_init - * - * Description: - * Initialize the list of free read-ahead buffers - * - * Assumptions: - * Called once early initialization. - * - ****************************************************************************/ - -void uip_tcpreadahead_init(void) -{ - int i; - - sq_init(&g_readahead.freebuffers); - for (i = 0; i < CONFIG_NET_NTCP_READAHEAD_BUFFERS; i++) - { - sq_addfirst(&g_readahead.buffers[i].rh_node, &g_readahead.freebuffers); - } -} - -/**************************************************************************** - * Function: uip_tcpreadahead_alloc - * - * Description: - * Allocate a TCP read-ahead buffer by taking a pre-allocated buffer from - * the free list. This function is called from TCP logic when new, - * incoming TCP data is received but there is no user logic receiving the - * the data. Note: kmalloc() cannot be used because this function is - * called from interrupt level. - * - * Assumptions: - * Called from interrupt level with interrupts disabled. - * - ****************************************************************************/ - -FAR struct uip_readahead_s *uip_tcpreadahead_alloc(void) -{ - return (FAR struct uip_readahead_s*)sq_remfirst(&g_readahead.freebuffers); -} - -/**************************************************************************** - * Function: uip_tcpreadahead_release - * - * Description: - * Release a TCP read-ahead buffer by returning the buffer to the free list. - * This function is called from user logic after it is consumed the buffered - * data. - * - * Assumptions: - * Called from user logic BUT with interrupts disabled. - * - ****************************************************************************/ - -void uip_tcpreadahead_release(FAR struct uip_readahead_s *readahead) -{ - sq_addfirst(&readahead->rh_node, &g_readahead.freebuffers); -} - -#endif /* CONFIG_NET && CONFIG_NET_TCP && CONFIG_NET_TCP_READAHEAD */ |