Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/unsupported/rpc/rpc.cpp@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
marcozecchini 0:9fca2b23d0ba 1 /* mbed Microcontroller Library
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2006-2013 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
marcozecchini 0:9fca2b23d0ba 5 * you may not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 6 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 9 *
marcozecchini 0:9fca2b23d0ba 10 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
marcozecchini 0:9fca2b23d0ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 13 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 14 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 15 */
marcozecchini 0:9fca2b23d0ba 16 #include "rpc.h"
marcozecchini 0:9fca2b23d0ba 17
marcozecchini 0:9fca2b23d0ba 18 using namespace std;
marcozecchini 0:9fca2b23d0ba 19
marcozecchini 0:9fca2b23d0ba 20 namespace mbed {
marcozecchini 0:9fca2b23d0ba 21
marcozecchini 0:9fca2b23d0ba 22 RPC::RPC(const char *name) {
marcozecchini 0:9fca2b23d0ba 23 _from_construct = false;
marcozecchini 0:9fca2b23d0ba 24 if (name != NULL) {
marcozecchini 0:9fca2b23d0ba 25 _name = new char[strlen(name) + 1];
marcozecchini 0:9fca2b23d0ba 26 strcpy(_name, name);
marcozecchini 0:9fca2b23d0ba 27 } else {
marcozecchini 0:9fca2b23d0ba 28 _name = new char[12];
marcozecchini 0:9fca2b23d0ba 29 sprintf(_name, "obj%p", this);
marcozecchini 0:9fca2b23d0ba 30 }
marcozecchini 0:9fca2b23d0ba 31 // put this object at head of the list
marcozecchini 0:9fca2b23d0ba 32 _next = _head;
marcozecchini 0:9fca2b23d0ba 33 _head = this;
marcozecchini 0:9fca2b23d0ba 34 }
marcozecchini 0:9fca2b23d0ba 35
marcozecchini 0:9fca2b23d0ba 36 RPC::~RPC() {
marcozecchini 0:9fca2b23d0ba 37 // remove this object from the list
marcozecchini 0:9fca2b23d0ba 38 if (_head == this) { // first in the list, so just drop me
marcozecchini 0:9fca2b23d0ba 39 _head = _next;
marcozecchini 0:9fca2b23d0ba 40 } else { // find the object before me, then drop me
marcozecchini 0:9fca2b23d0ba 41 RPC* p = _head;
marcozecchini 0:9fca2b23d0ba 42 while (p->_next != this) {
marcozecchini 0:9fca2b23d0ba 43 p = p->_next;
marcozecchini 0:9fca2b23d0ba 44 }
marcozecchini 0:9fca2b23d0ba 45 p->_next = _next;
marcozecchini 0:9fca2b23d0ba 46 }
marcozecchini 0:9fca2b23d0ba 47 }
marcozecchini 0:9fca2b23d0ba 48
marcozecchini 0:9fca2b23d0ba 49 const rpc_method *RPC::get_rpc_methods() {
marcozecchini 0:9fca2b23d0ba 50 static const rpc_method methods[] = {
marcozecchini 0:9fca2b23d0ba 51 {"delete", rpc_method_caller<RPC, &RPC::delete_self> },
marcozecchini 0:9fca2b23d0ba 52 RPC_METHOD_END
marcozecchini 0:9fca2b23d0ba 53 };
marcozecchini 0:9fca2b23d0ba 54 return methods;
marcozecchini 0:9fca2b23d0ba 55 }
marcozecchini 0:9fca2b23d0ba 56
marcozecchini 0:9fca2b23d0ba 57 RPC *RPC::lookup(const char *name) {
marcozecchini 0:9fca2b23d0ba 58 size_t len = strlen(name);
marcozecchini 0:9fca2b23d0ba 59 for (RPC *p = _head; p != NULL; p = p->_next) {
marcozecchini 0:9fca2b23d0ba 60 /* Check that p->_name matches name and is the correct length */
marcozecchini 0:9fca2b23d0ba 61 if (strncmp(p->_name, name, len) == 0 && (strlen(p->_name) == len)) {
marcozecchini 0:9fca2b23d0ba 62 return p;
marcozecchini 0:9fca2b23d0ba 63 }
marcozecchini 0:9fca2b23d0ba 64 }
marcozecchini 0:9fca2b23d0ba 65 return NULL;
marcozecchini 0:9fca2b23d0ba 66 }
marcozecchini 0:9fca2b23d0ba 67
marcozecchini 0:9fca2b23d0ba 68 void RPC::delete_self() {
marcozecchini 0:9fca2b23d0ba 69 delete[] _name;
marcozecchini 0:9fca2b23d0ba 70 if (_from_construct) {
marcozecchini 0:9fca2b23d0ba 71 delete this;
marcozecchini 0:9fca2b23d0ba 72 }
marcozecchini 0:9fca2b23d0ba 73 }
marcozecchini 0:9fca2b23d0ba 74
marcozecchini 0:9fca2b23d0ba 75 void RPC::list_objs(Arguments *args, Reply *result) {
marcozecchini 0:9fca2b23d0ba 76 for (RPC *ptr = RPC::_head; ptr != NULL; ptr = ptr->_next) {
marcozecchini 0:9fca2b23d0ba 77 if (ptr->_from_construct) {
marcozecchini 0:9fca2b23d0ba 78 result->putData<const char*>(ptr->_name);
marcozecchini 0:9fca2b23d0ba 79 }
marcozecchini 0:9fca2b23d0ba 80 }
marcozecchini 0:9fca2b23d0ba 81 }
marcozecchini 0:9fca2b23d0ba 82
marcozecchini 0:9fca2b23d0ba 83 void RPC::clear(Arguments*, Reply*) {
marcozecchini 0:9fca2b23d0ba 84 RPC *ptr = RPC::_head;
marcozecchini 0:9fca2b23d0ba 85 while (ptr != NULL) {
marcozecchini 0:9fca2b23d0ba 86 RPC *tmp = ptr;
marcozecchini 0:9fca2b23d0ba 87 ptr = ptr->_next;
marcozecchini 0:9fca2b23d0ba 88 delete[] tmp->_name;
marcozecchini 0:9fca2b23d0ba 89 if (tmp->_from_construct) {
marcozecchini 0:9fca2b23d0ba 90 delete tmp;
marcozecchini 0:9fca2b23d0ba 91 }
marcozecchini 0:9fca2b23d0ba 92 }
marcozecchini 0:9fca2b23d0ba 93 }
marcozecchini 0:9fca2b23d0ba 94
marcozecchini 0:9fca2b23d0ba 95 const rpc_function RPC::_RPC_funcs[] = {
marcozecchini 0:9fca2b23d0ba 96 {"clear", &RPC::clear },
marcozecchini 0:9fca2b23d0ba 97 { "objects", &RPC::list_objs },
marcozecchini 0:9fca2b23d0ba 98 RPC_METHOD_END
marcozecchini 0:9fca2b23d0ba 99 };
marcozecchini 0:9fca2b23d0ba 100
marcozecchini 0:9fca2b23d0ba 101 rpc_class RPC::_RPC_class = { "RPC", _RPC_funcs, NULL };
marcozecchini 0:9fca2b23d0ba 102
marcozecchini 0:9fca2b23d0ba 103 RPC *RPC::_head = NULL;
marcozecchini 0:9fca2b23d0ba 104
marcozecchini 0:9fca2b23d0ba 105 rpc_class *RPC::_classes = &_RPC_class;
marcozecchini 0:9fca2b23d0ba 106
marcozecchini 0:9fca2b23d0ba 107 bool RPC::call(const char *request, char *reply) {
marcozecchini 0:9fca2b23d0ba 108 if (request == NULL) return false;
marcozecchini 0:9fca2b23d0ba 109
marcozecchini 0:9fca2b23d0ba 110 Arguments args(request);
marcozecchini 0:9fca2b23d0ba 111 Reply r(reply);
marcozecchini 0:9fca2b23d0ba 112
marcozecchini 0:9fca2b23d0ba 113 /* If there's no name print object and class names to result */
marcozecchini 0:9fca2b23d0ba 114 if (args.obj_name == NULL) {
marcozecchini 0:9fca2b23d0ba 115 for (RPC *p = RPC::_head; p != NULL; p = p->_next) {
marcozecchini 0:9fca2b23d0ba 116 r.putData<const char*>(p->_name);
marcozecchini 0:9fca2b23d0ba 117 }
marcozecchini 0:9fca2b23d0ba 118 for (rpc_class *c = RPC::_classes; c != NULL; c = c->next) {
marcozecchini 0:9fca2b23d0ba 119 r.putData<const char*>(c->name);
marcozecchini 0:9fca2b23d0ba 120 }
marcozecchini 0:9fca2b23d0ba 121 return true;
marcozecchini 0:9fca2b23d0ba 122 }
marcozecchini 0:9fca2b23d0ba 123
marcozecchini 0:9fca2b23d0ba 124 /* First try matching an instance */
marcozecchini 0:9fca2b23d0ba 125 RPC *p = lookup(args.obj_name);
marcozecchini 0:9fca2b23d0ba 126 if (p != NULL) {
marcozecchini 0:9fca2b23d0ba 127 /* Get the list of methods we support */
marcozecchini 0:9fca2b23d0ba 128 const rpc_method *cur_method = p->get_rpc_methods();
marcozecchini 0:9fca2b23d0ba 129
marcozecchini 0:9fca2b23d0ba 130 /* When there's no method print method names to result */
marcozecchini 0:9fca2b23d0ba 131 if (args.method_name == NULL) {
marcozecchini 0:9fca2b23d0ba 132 while (true) {
marcozecchini 0:9fca2b23d0ba 133 for (; cur_method->name != NULL; cur_method++) {
marcozecchini 0:9fca2b23d0ba 134 r.putData<const char*>(cur_method->name);
marcozecchini 0:9fca2b23d0ba 135 }
marcozecchini 0:9fca2b23d0ba 136
marcozecchini 0:9fca2b23d0ba 137 /* write_name_arr's args are references, so result and cur_method will have changed */
marcozecchini 0:9fca2b23d0ba 138 if (cur_method->super != 0) {
marcozecchini 0:9fca2b23d0ba 139 cur_method = cur_method->super(p);
marcozecchini 0:9fca2b23d0ba 140 } else {
marcozecchini 0:9fca2b23d0ba 141 return true;
marcozecchini 0:9fca2b23d0ba 142 }
marcozecchini 0:9fca2b23d0ba 143 }
marcozecchini 0:9fca2b23d0ba 144 }
marcozecchini 0:9fca2b23d0ba 145
marcozecchini 0:9fca2b23d0ba 146 /* Look through the methods for the one whose name matches */
marcozecchini 0:9fca2b23d0ba 147 while (true) {
marcozecchini 0:9fca2b23d0ba 148 for (; cur_method->name != NULL; cur_method++) {
marcozecchini 0:9fca2b23d0ba 149 if (strcmp(cur_method->name, args.method_name) == 0) {
marcozecchini 0:9fca2b23d0ba 150 (cur_method->method_caller)(p, &args, &r);
marcozecchini 0:9fca2b23d0ba 151 return true;
marcozecchini 0:9fca2b23d0ba 152 }
marcozecchini 0:9fca2b23d0ba 153 }
marcozecchini 0:9fca2b23d0ba 154
marcozecchini 0:9fca2b23d0ba 155 if (cur_method->super != 0) {
marcozecchini 0:9fca2b23d0ba 156 cur_method = cur_method->super(p);
marcozecchini 0:9fca2b23d0ba 157 } else {
marcozecchini 0:9fca2b23d0ba 158 /* end of methods and no match */
marcozecchini 0:9fca2b23d0ba 159 return false;
marcozecchini 0:9fca2b23d0ba 160 }
marcozecchini 0:9fca2b23d0ba 161
marcozecchini 0:9fca2b23d0ba 162 }
marcozecchini 0:9fca2b23d0ba 163 }
marcozecchini 0:9fca2b23d0ba 164
marcozecchini 0:9fca2b23d0ba 165 /* Then try a class */
marcozecchini 0:9fca2b23d0ba 166 for (const rpc_class *q = _classes; q != NULL; q = q->next) {
marcozecchini 0:9fca2b23d0ba 167 if (strcmp(q->name, args.obj_name) == 0) {
marcozecchini 0:9fca2b23d0ba 168 /* Matched the class name, so get its functions */
marcozecchini 0:9fca2b23d0ba 169 const rpc_function *cur_func = q->static_functions;
marcozecchini 0:9fca2b23d0ba 170 if (args.method_name == NULL) {
marcozecchini 0:9fca2b23d0ba 171 for (; cur_func->name != NULL; cur_func++) {
marcozecchini 0:9fca2b23d0ba 172 r.putData<const char*>(cur_func->name);
marcozecchini 0:9fca2b23d0ba 173 }
marcozecchini 0:9fca2b23d0ba 174 return true;
marcozecchini 0:9fca2b23d0ba 175 } else {
marcozecchini 0:9fca2b23d0ba 176 /* Otherwise call the appropriate function */
marcozecchini 0:9fca2b23d0ba 177 for (; cur_func->name != NULL; cur_func++) {
marcozecchini 0:9fca2b23d0ba 178 if (strcmp(cur_func->name, args.method_name) == 0) {
marcozecchini 0:9fca2b23d0ba 179 (cur_func->function_caller)(&args, &r);
marcozecchini 0:9fca2b23d0ba 180 return true;
marcozecchini 0:9fca2b23d0ba 181 }
marcozecchini 0:9fca2b23d0ba 182 }
marcozecchini 0:9fca2b23d0ba 183 return false;
marcozecchini 0:9fca2b23d0ba 184 }
marcozecchini 0:9fca2b23d0ba 185 }
marcozecchini 0:9fca2b23d0ba 186 }
marcozecchini 0:9fca2b23d0ba 187
marcozecchini 0:9fca2b23d0ba 188 return false;
marcozecchini 0:9fca2b23d0ba 189 }
marcozecchini 0:9fca2b23d0ba 190
marcozecchini 0:9fca2b23d0ba 191 } // namespace mbed