Maxim nexpaq / nexpaq_dev

Preliminary main mbed library for nexpaq development

features/net/network-socket/UDPSocket.cpp@1:d96dbedaebdb, 2016-11-04 (annotated)

Committer:
nexpaq
Date:
Fri Nov 04 20:54:50 2016 +0000
Revision:
1:d96dbedaebdb
Parent:
0:6c56fb4bc5f0 
Removed extra directories for other platforms

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 "UDPSocket.h"
nexpaq 0:6c56fb4bc5f0 18 #include "Timer.h"
nexpaq 0:6c56fb4bc5f0 19 #include "mbed_assert.h"
nexpaq 0:6c56fb4bc5f0 20
nexpaq 0:6c56fb4bc5f0 21 UDPSocket::UDPSocket()
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 UDPSocket::~UDPSocket()
nexpaq 0:6c56fb4bc5f0 28 {
nexpaq 0:6c56fb4bc5f0 29 close();
nexpaq 0:6c56fb4bc5f0 30 }
nexpaq 0:6c56fb4bc5f0 31
nexpaq 0:6c56fb4bc5f0 32 nsapi_protocol_t UDPSocket::get_proto()
nexpaq 0:6c56fb4bc5f0 33 {
nexpaq 0:6c56fb4bc5f0 34 return NSAPI_UDP;
nexpaq 0:6c56fb4bc5f0 35 }
nexpaq 0:6c56fb4bc5f0 36
nexpaq 0:6c56fb4bc5f0 37 int UDPSocket::sendto(const char *host, uint16_t port, const void *data, unsigned size)
nexpaq 0:6c56fb4bc5f0 38 {
nexpaq 0:6c56fb4bc5f0 39 SocketAddress address(_stack, host, port);
nexpaq 0:6c56fb4bc5f0 40 if (!address) {
nexpaq 0:6c56fb4bc5f0 41 return NSAPI_ERROR_DNS_FAILURE;
nexpaq 0:6c56fb4bc5f0 42 }
nexpaq 0:6c56fb4bc5f0 43
nexpaq 0:6c56fb4bc5f0 44 // sendto is thread safe
nexpaq 0:6c56fb4bc5f0 45 return sendto(address, data, size);
nexpaq 0:6c56fb4bc5f0 46 }
nexpaq 0:6c56fb4bc5f0 47
nexpaq 0:6c56fb4bc5f0 48 int UDPSocket::sendto(const SocketAddress &address, const void *data, unsigned size)
nexpaq 0:6c56fb4bc5f0 49 {
nexpaq 0:6c56fb4bc5f0 50 _lock.lock();
nexpaq 0:6c56fb4bc5f0 51 int ret;
nexpaq 0:6c56fb4bc5f0 52
nexpaq 0:6c56fb4bc5f0 53 // If this assert is hit then there are two threads
nexpaq 0:6c56fb4bc5f0 54 // performing a send at the same time which is undefined
nexpaq 0:6c56fb4bc5f0 55 // behavior
nexpaq 0:6c56fb4bc5f0 56 MBED_ASSERT(!_write_in_progress);
nexpaq 0:6c56fb4bc5f0 57 _write_in_progress = true;
nexpaq 0:6c56fb4bc5f0 58
nexpaq 0:6c56fb4bc5f0 59 while (true) {
nexpaq 0:6c56fb4bc5f0 60 if (!_socket) {
nexpaq 0:6c56fb4bc5f0 61 ret = NSAPI_ERROR_NO_SOCKET;
nexpaq 0:6c56fb4bc5f0 62 break;
nexpaq 0:6c56fb4bc5f0 63 }
nexpaq 0:6c56fb4bc5f0 64
nexpaq 0:6c56fb4bc5f0 65 _pending = 0;
nexpaq 0:6c56fb4bc5f0 66 int sent = _stack->socket_sendto(_socket, address, data, size);
nexpaq 0:6c56fb4bc5f0 67 if ((0 == _timeout) || (NSAPI_ERROR_WOULD_BLOCK != sent)) {
nexpaq 0:6c56fb4bc5f0 68 ret = sent;
nexpaq 0:6c56fb4bc5f0 69 break;
nexpaq 0:6c56fb4bc5f0 70 } else {
nexpaq 0:6c56fb4bc5f0 71 int32_t count;
nexpaq 0:6c56fb4bc5f0 72
nexpaq 0:6c56fb4bc5f0 73 // Release lock before blocking so other threads
nexpaq 0:6c56fb4bc5f0 74 // accessing this object aren't blocked
nexpaq 0:6c56fb4bc5f0 75 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 76 count = _write_sem.wait(_timeout);
nexpaq 0:6c56fb4bc5f0 77 _lock.lock();
nexpaq 0:6c56fb4bc5f0 78
nexpaq 0:6c56fb4bc5f0 79 if (count < 1) {
nexpaq 0:6c56fb4bc5f0 80 // Semaphore wait timed out so break out and return
nexpaq 0:6c56fb4bc5f0 81 ret = NSAPI_ERROR_WOULD_BLOCK;
nexpaq 0:6c56fb4bc5f0 82 break;
nexpaq 0:6c56fb4bc5f0 83 }
nexpaq 0:6c56fb4bc5f0 84 }
nexpaq 0:6c56fb4bc5f0 85 }
nexpaq 0:6c56fb4bc5f0 86
nexpaq 0:6c56fb4bc5f0 87 _write_in_progress = false;
nexpaq 0:6c56fb4bc5f0 88 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 89 return ret;
nexpaq 0:6c56fb4bc5f0 90 }
nexpaq 0:6c56fb4bc5f0 91
nexpaq 0:6c56fb4bc5f0 92 int UDPSocket::recvfrom(SocketAddress *address, void *buffer, unsigned size)
nexpaq 0:6c56fb4bc5f0 93 {
nexpaq 0:6c56fb4bc5f0 94 _lock.lock();
nexpaq 0:6c56fb4bc5f0 95 int ret;
nexpaq 0:6c56fb4bc5f0 96
nexpaq 0:6c56fb4bc5f0 97 // If this assert is hit then there are two threads
nexpaq 0:6c56fb4bc5f0 98 // performing a recv at the same time which is undefined
nexpaq 0:6c56fb4bc5f0 99 // behavior
nexpaq 0:6c56fb4bc5f0 100 MBED_ASSERT(!_read_in_progress);
nexpaq 0:6c56fb4bc5f0 101 _read_in_progress = true;
nexpaq 0:6c56fb4bc5f0 102
nexpaq 0:6c56fb4bc5f0 103 while (true) {
nexpaq 0:6c56fb4bc5f0 104 if (!_socket) {
nexpaq 0:6c56fb4bc5f0 105 ret = NSAPI_ERROR_NO_SOCKET;
nexpaq 0:6c56fb4bc5f0 106 break;
nexpaq 0:6c56fb4bc5f0 107 }
nexpaq 0:6c56fb4bc5f0 108
nexpaq 0:6c56fb4bc5f0 109 _pending = 0;
nexpaq 0:6c56fb4bc5f0 110 int recv = _stack->socket_recvfrom(_socket, address, buffer, size);
nexpaq 0:6c56fb4bc5f0 111 if ((0 == _timeout) || (NSAPI_ERROR_WOULD_BLOCK != recv)) {
nexpaq 0:6c56fb4bc5f0 112 ret = recv;
nexpaq 0:6c56fb4bc5f0 113 break;
nexpaq 0:6c56fb4bc5f0 114 } else {
nexpaq 0:6c56fb4bc5f0 115 int32_t count;
nexpaq 0:6c56fb4bc5f0 116
nexpaq 0:6c56fb4bc5f0 117 // Release lock before blocking so other threads
nexpaq 0:6c56fb4bc5f0 118 // accessing this object aren't blocked
nexpaq 0:6c56fb4bc5f0 119 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 120 count = _read_sem.wait(_timeout);
nexpaq 0:6c56fb4bc5f0 121 _lock.lock();
nexpaq 0:6c56fb4bc5f0 122
nexpaq 0:6c56fb4bc5f0 123 if (count < 1) {
nexpaq 0:6c56fb4bc5f0 124 // Semaphore wait timed out so break out and return
nexpaq 0:6c56fb4bc5f0 125 ret = NSAPI_ERROR_WOULD_BLOCK;
nexpaq 0:6c56fb4bc5f0 126 break;
nexpaq 0:6c56fb4bc5f0 127 }
nexpaq 0:6c56fb4bc5f0 128 }
nexpaq 0:6c56fb4bc5f0 129 }
nexpaq 0:6c56fb4bc5f0 130
nexpaq 0:6c56fb4bc5f0 131 _read_in_progress = false;
nexpaq 0:6c56fb4bc5f0 132 _lock.unlock();
nexpaq 0:6c56fb4bc5f0 133 return ret;
nexpaq 0:6c56fb4bc5f0 134 }
nexpaq 0:6c56fb4bc5f0 135
nexpaq 0:6c56fb4bc5f0 136 void UDPSocket::event()
nexpaq 0:6c56fb4bc5f0 137 {
nexpaq 0:6c56fb4bc5f0 138 int32_t wcount = _write_sem.wait(0);
nexpaq 0:6c56fb4bc5f0 139 if (wcount <= 1) {
nexpaq 0:6c56fb4bc5f0 140 _write_sem.release();
nexpaq 0:6c56fb4bc5f0 141 }
nexpaq 0:6c56fb4bc5f0 142 int32_t rcount = _read_sem.wait(0);
nexpaq 0:6c56fb4bc5f0 143 if (rcount <= 1) {
nexpaq 0:6c56fb4bc5f0 144 _read_sem.release();
nexpaq 0:6c56fb4bc5f0 145 }
nexpaq 0:6c56fb4bc5f0 146
nexpaq 0:6c56fb4bc5f0 147 _pending += 1;
nexpaq 0:6c56fb4bc5f0 148 if (_callback && _pending == 1) {
nexpaq 0:6c56fb4bc5f0 149 _callback();
nexpaq 0:6c56fb4bc5f0 150 }
nexpaq 0:6c56fb4bc5f0 151 }