Maxim nexpaq / nexpaq_dev

Preliminary main mbed library for nexpaq development

features/net/network-socket/TCPSocket.cpp@0:6c56fb4bc5f0, 2016-11-04 (annotated)

Committer:
nexpaq
Date:
Fri Nov 04 20:27:58 2016 +0000
Revision:
0:6c56fb4bc5f0
Moving to library for sharing updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 0:6c56fb4bc5f0 1 /* Socket
nexpaq 0:6c56fb4bc5f0 2 * Copyright (c) 2015 ARM Limited
nexpaq 0:6c56fb4bc5f0 3 *
nexpaq 0:6c56fb4bc5f0 4 * Licensed under the Apache License, Version 2.0 (the "License");
nexpaq 0:6c56fb4bc5f0 5 * you may not use this file except in compliance with the License.
nexpaq 0:6c56fb4bc5f0 6 * You may obtain a copy of the License at
nexpaq 0:6c56fb4bc5f0 7 *
nexpaq 0:6c56fb4bc5f0 8 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 0:6c56fb4bc5f0 9 *
nexpaq 0:6c56fb4bc5f0 10 * Unless required by applicable law or agreed to in writing, software
nexpaq 0:6c56fb4bc5f0 11 * distributed under the License is distributed on an "AS IS" BASIS,
nexpaq 0:6c56fb4bc5f0 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 0:6c56fb4bc5f0 13 * See the License for the specific language governing permissions and
nexpaq 0:6c56fb4bc5f0 14 * limitations under the License.
nexpaq 0:6c56fb4bc5f0 15 */
nexpaq 0:6c56fb4bc5f0 16
nexpaq 0:6c56fb4bc5f0 17 #include "TCPSocket.h"
nexpaq 0:6c56fb4bc5f0 18 #include "Timer.h"
nexpaq 0:6c56fb4bc5f0 19 #include "mbed_assert.h"
nexpaq 0:6c56fb4bc5f0 20
nexpaq 0:6c56fb4bc5f0 21 TCPSocket::TCPSocket()
nexpaq 0:6c56fb4bc5f0 22 : _pending(0), _read_sem(0), _write_sem(0),
nexpaq 0:6c56fb4bc5f0 23 _read_in_progress(false), _write_in_progress(false)
nexpaq 0:6c56fb4bc5f0 24 {
nexpaq 0:6c56fb4bc5f0 25 }
nexpaq 0:6c56fb4bc5f0 26
nexpaq 0:6c56fb4bc5f0 27 TCPSocket::~TCPSocket()
nexpaq 0:6c56fb4bc5f0 28 {
nexpaq 0:6c56fb4bc5f0 29 close();
nexpaq 0:6c56fb4bc5f0 30 }
nexpaq 0:6c56fb4bc5f0 31
nexpaq 0:6c56fb4bc5f0 32 nsapi_protocol_t TCPSocket::get_proto()
nexpaq 0:6c56fb4bc5f0 33 {
nexpaq 0:6c56fb4bc5f0 34 return NSAPI_TCP;
nexpaq 0:6c56fb4bc5f0 35 }
nexpaq 0:6c56fb4bc5f0 36
nexpaq 0:6c56fb4bc5f0 37 int TCPSocket::connect(const SocketAddress &address)
nexpaq 0:6c56fb4bc5f0 38 {
nexpaq 0:6c56fb4bc5f0 39 _lock.lock();
nexpaq 0:6c56fb4bc5f0 40 int ret;
nexpaq 0:6c56fb4bc5f0 41
nexpaq 0:6c56fb4bc5f0 42 if (!_socket) {
nexpaq 0:6c56fb4bc5f0 43 ret = NSAPI_ERROR_NO_SOCKET;
nexpaq 0:6c56fb4bc5f0 44 } else {
nexpaq 0:6c56fb4bc5f0 45 ret = _stack->socket_connect(_socket, address);
nexpaq 0:6c56fb4bc5f0 46 }
nexpaq 0:6c56fb4bc5f0 47
nexpaq 0:6c56fb4bc5f0 48 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 49 return ret;
nexpaq 0:6c56fb4bc5f0 50 }
nexpaq 0:6c56fb4bc5f0 51
nexpaq 0:6c56fb4bc5f0 52 int TCPSocket::connect(const char *host, uint16_t port)
nexpaq 0:6c56fb4bc5f0 53 {
nexpaq 0:6c56fb4bc5f0 54 SocketAddress address(_stack, host, port);
nexpaq 0:6c56fb4bc5f0 55 if (!address) {
nexpaq 0:6c56fb4bc5f0 56 return NSAPI_ERROR_DNS_FAILURE;
nexpaq 0:6c56fb4bc5f0 57 }
nexpaq 0:6c56fb4bc5f0 58
nexpaq 0:6c56fb4bc5f0 59 // connect is thread safe
nexpaq 0:6c56fb4bc5f0 60 return connect(address);
nexpaq 0:6c56fb4bc5f0 61 }
nexpaq 0:6c56fb4bc5f0 62
nexpaq 0:6c56fb4bc5f0 63 int TCPSocket::send(const void *data, unsigned size)
nexpaq 0:6c56fb4bc5f0 64 {
nexpaq 0:6c56fb4bc5f0 65 _lock.lock();
nexpaq 0:6c56fb4bc5f0 66 int ret;
nexpaq 0:6c56fb4bc5f0 67
nexpaq 0:6c56fb4bc5f0 68 // If this assert is hit then there are two threads
nexpaq 0:6c56fb4bc5f0 69 // performing a send at the same time which is undefined
nexpaq 0:6c56fb4bc5f0 70 // behavior
nexpaq 0:6c56fb4bc5f0 71 MBED_ASSERT(!_write_in_progress);
nexpaq 0:6c56fb4bc5f0 72 _write_in_progress = true;
nexpaq 0:6c56fb4bc5f0 73
nexpaq 0:6c56fb4bc5f0 74 while (true) {
nexpaq 0:6c56fb4bc5f0 75 if (!_socket) {
nexpaq 0:6c56fb4bc5f0 76 ret = NSAPI_ERROR_NO_SOCKET;
nexpaq 0:6c56fb4bc5f0 77 break;
nexpaq 0:6c56fb4bc5f0 78 }
nexpaq 0:6c56fb4bc5f0 79
nexpaq 0:6c56fb4bc5f0 80 _pending = 0;
nexpaq 0:6c56fb4bc5f0 81 int sent = _stack->socket_send(_socket, data, size);
nexpaq 0:6c56fb4bc5f0 82 if ((0 == _timeout) || (NSAPI_ERROR_WOULD_BLOCK != sent)) {
nexpaq 0:6c56fb4bc5f0 83 ret = sent;
nexpaq 0:6c56fb4bc5f0 84 break;
nexpaq 0:6c56fb4bc5f0 85 } else {
nexpaq 0:6c56fb4bc5f0 86 int32_t count;
nexpaq 0:6c56fb4bc5f0 87
nexpaq 0:6c56fb4bc5f0 88 // Release lock before blocking so other threads
nexpaq 0:6c56fb4bc5f0 89 // accessing this object aren't blocked
nexpaq 0:6c56fb4bc5f0 90 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 91 count = _write_sem.wait(_timeout);
nexpaq 0:6c56fb4bc5f0 92 _lock.lock();
nexpaq 0:6c56fb4bc5f0 93
nexpaq 0:6c56fb4bc5f0 94 if (count < 1) {
nexpaq 0:6c56fb4bc5f0 95 // Semaphore wait timed out so break out and return
nexpaq 0:6c56fb4bc5f0 96 ret = NSAPI_ERROR_WOULD_BLOCK;
nexpaq 0:6c56fb4bc5f0 97 break;
nexpaq 0:6c56fb4bc5f0 98 }
nexpaq 0:6c56fb4bc5f0 99 }
nexpaq 0:6c56fb4bc5f0 100 }
nexpaq 0:6c56fb4bc5f0 101
nexpaq 0:6c56fb4bc5f0 102 _write_in_progress = false;
nexpaq 0:6c56fb4bc5f0 103 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 104 return ret;
nexpaq 0:6c56fb4bc5f0 105 }
nexpaq 0:6c56fb4bc5f0 106
nexpaq 0:6c56fb4bc5f0 107 int TCPSocket::recv(void *data, unsigned size)
nexpaq 0:6c56fb4bc5f0 108 {
nexpaq 0:6c56fb4bc5f0 109 _lock.lock();
nexpaq 0:6c56fb4bc5f0 110 int ret;
nexpaq 0:6c56fb4bc5f0 111
nexpaq 0:6c56fb4bc5f0 112 // If this assert is hit then there are two threads
nexpaq 0:6c56fb4bc5f0 113 // performing a recv at the same time which is undefined
nexpaq 0:6c56fb4bc5f0 114 // behavior
nexpaq 0:6c56fb4bc5f0 115 MBED_ASSERT(!_read_in_progress);
nexpaq 0:6c56fb4bc5f0 116 _read_in_progress = true;
nexpaq 0:6c56fb4bc5f0 117
nexpaq 0:6c56fb4bc5f0 118 while (true) {
nexpaq 0:6c56fb4bc5f0 119 if (!_socket) {
nexpaq 0:6c56fb4bc5f0 120 ret = NSAPI_ERROR_NO_SOCKET;
nexpaq 0:6c56fb4bc5f0 121 break;
nexpaq 0:6c56fb4bc5f0 122 }
nexpaq 0:6c56fb4bc5f0 123
nexpaq 0:6c56fb4bc5f0 124 _pending = 0;
nexpaq 0:6c56fb4bc5f0 125 int recv = _stack->socket_recv(_socket, data, size);
nexpaq 0:6c56fb4bc5f0 126 if ((0 == _timeout) || (NSAPI_ERROR_WOULD_BLOCK != recv)) {
nexpaq 0:6c56fb4bc5f0 127 ret = recv;
nexpaq 0:6c56fb4bc5f0 128 break;
nexpaq 0:6c56fb4bc5f0 129 } else {
nexpaq 0:6c56fb4bc5f0 130 int32_t count;
nexpaq 0:6c56fb4bc5f0 131
nexpaq 0:6c56fb4bc5f0 132 // Release lock before blocking so other threads
nexpaq 0:6c56fb4bc5f0 133 // accessing this object aren't blocked
nexpaq 0:6c56fb4bc5f0 134 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 135 count = _read_sem.wait(_timeout);
nexpaq 0:6c56fb4bc5f0 136 _lock.lock();
nexpaq 0:6c56fb4bc5f0 137
nexpaq 0:6c56fb4bc5f0 138 if (count < 1) {
nexpaq 0:6c56fb4bc5f0 139 // Semaphore wait timed out so break out and return
nexpaq 0:6c56fb4bc5f0 140 ret = NSAPI_ERROR_WOULD_BLOCK;
nexpaq 0:6c56fb4bc5f0 141 break;
nexpaq 0:6c56fb4bc5f0 142 }
nexpaq 0:6c56fb4bc5f0 143 }
nexpaq 0:6c56fb4bc5f0 144 }
nexpaq 0:6c56fb4bc5f0 145
nexpaq 0:6c56fb4bc5f0 146 _read_in_progress = false;
nexpaq 0:6c56fb4bc5f0 147 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 148 return ret;
nexpaq 0:6c56fb4bc5f0 149 }
nexpaq 0:6c56fb4bc5f0 150
nexpaq 0:6c56fb4bc5f0 151 void TCPSocket::event()
nexpaq 0:6c56fb4bc5f0 152 {
nexpaq 0:6c56fb4bc5f0 153 int32_t wcount = _write_sem.wait(0);
nexpaq 0:6c56fb4bc5f0 154 if (wcount <= 1) {
nexpaq 0:6c56fb4bc5f0 155 _write_sem.release();
nexpaq 0:6c56fb4bc5f0 156 }
nexpaq 0:6c56fb4bc5f0 157 int32_t rcount = _read_sem.wait(0);
nexpaq 0:6c56fb4bc5f0 158 if (rcount <= 1) {
nexpaq 0:6c56fb4bc5f0 159 _read_sem.release();
nexpaq 0:6c56fb4bc5f0 160 }
nexpaq 0:6c56fb4bc5f0 161
nexpaq 0:6c56fb4bc5f0 162 _pending += 1;
nexpaq 0:6c56fb4bc5f0 163 if (_callback && _pending == 1) {
nexpaq 0:6c56fb4bc5f0 164 _callback();
nexpaq 0:6c56fb4bc5f0 165 }
nexpaq 0:6c56fb4bc5f0 166 }