Knight KE / Mbed OS Game_Master

游戏王对战板，目前code还是空的

mbed-os/drivers/InterruptManager.cpp@0:9b3d4731edbb, 2018-06-21 (annotated)

Committer:
WFKnight
Date:
Thu Jun 21 13:51:43 2018 +0000
Revision:
0:9b3d4731edbb
UART, RTOS, LED

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WFKnight 0:9b3d4731edbb 1 /* mbed Microcontroller Library
WFKnight 0:9b3d4731edbb 2 * Copyright (c) 2006-2013 ARM Limited
WFKnight 0:9b3d4731edbb 3 *
WFKnight 0:9b3d4731edbb 4 * Licensed under the Apache License, Version 2.0 (the "License");
WFKnight 0:9b3d4731edbb 5 * you may not use this file except in compliance with the License.
WFKnight 0:9b3d4731edbb 6 * You may obtain a copy of the License at
WFKnight 0:9b3d4731edbb 7 *
WFKnight 0:9b3d4731edbb 8 * http://www.apache.org/licenses/LICENSE-2.0
WFKnight 0:9b3d4731edbb 9 *
WFKnight 0:9b3d4731edbb 10 * Unless required by applicable law or agreed to in writing, software
WFKnight 0:9b3d4731edbb 11 * distributed under the License is distributed on an "AS IS" BASIS,
WFKnight 0:9b3d4731edbb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
WFKnight 0:9b3d4731edbb 13 * See the License for the specific language governing permissions and
WFKnight 0:9b3d4731edbb 14 * limitations under the License.
WFKnight 0:9b3d4731edbb 15 */
WFKnight 0:9b3d4731edbb 16 #include "cmsis.h"
WFKnight 0:9b3d4731edbb 17 #if defined(NVIC_NUM_VECTORS)
WFKnight 0:9b3d4731edbb 18
WFKnight 0:9b3d4731edbb 19 // Suppress deprecation warnings since this whole
WFKnight 0:9b3d4731edbb 20 // class is deprecated already
WFKnight 0:9b3d4731edbb 21 #include "mbed_toolchain.h"
WFKnight 0:9b3d4731edbb 22 #undef MBED_DEPRECATED_SINCE
WFKnight 0:9b3d4731edbb 23 #define MBED_DEPRECATED_SINCE(...)
WFKnight 0:9b3d4731edbb 24
WFKnight 0:9b3d4731edbb 25 #include "drivers/InterruptManager.h"
WFKnight 0:9b3d4731edbb 26 #include "platform/mbed_critical.h"
WFKnight 0:9b3d4731edbb 27 #include <string.h>
WFKnight 0:9b3d4731edbb 28
WFKnight 0:9b3d4731edbb 29 #define CHAIN_INITIAL_SIZE 4
WFKnight 0:9b3d4731edbb 30
WFKnight 0:9b3d4731edbb 31 namespace mbed {
WFKnight 0:9b3d4731edbb 32
WFKnight 0:9b3d4731edbb 33 typedef void (*pvoidf)(void);
WFKnight 0:9b3d4731edbb 34
WFKnight 0:9b3d4731edbb 35 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
WFKnight 0:9b3d4731edbb 36
WFKnight 0:9b3d4731edbb 37 InterruptManager* InterruptManager::get() {
WFKnight 0:9b3d4731edbb 38
WFKnight 0:9b3d4731edbb 39 if (NULL == _instance) {
WFKnight 0:9b3d4731edbb 40 InterruptManager* temp = new InterruptManager();
WFKnight 0:9b3d4731edbb 41
WFKnight 0:9b3d4731edbb 42 // Atomically set _instance
WFKnight 0:9b3d4731edbb 43 core_util_critical_section_enter();
WFKnight 0:9b3d4731edbb 44 if (NULL == _instance) {
WFKnight 0:9b3d4731edbb 45 _instance = temp;
WFKnight 0:9b3d4731edbb 46 }
WFKnight 0:9b3d4731edbb 47 core_util_critical_section_exit();
WFKnight 0:9b3d4731edbb 48
WFKnight 0:9b3d4731edbb 49 // Another thread got there first so delete ours
WFKnight 0:9b3d4731edbb 50 if (temp != _instance) {
WFKnight 0:9b3d4731edbb 51 delete temp;
WFKnight 0:9b3d4731edbb 52 }
WFKnight 0:9b3d4731edbb 53
WFKnight 0:9b3d4731edbb 54 }
WFKnight 0:9b3d4731edbb 55 return _instance;
WFKnight 0:9b3d4731edbb 56 }
WFKnight 0:9b3d4731edbb 57
WFKnight 0:9b3d4731edbb 58 InterruptManager::InterruptManager() {
WFKnight 0:9b3d4731edbb 59 // No mutex needed in constructor
WFKnight 0:9b3d4731edbb 60 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
WFKnight 0:9b3d4731edbb 61 }
WFKnight 0:9b3d4731edbb 62
WFKnight 0:9b3d4731edbb 63 void InterruptManager::destroy() {
WFKnight 0:9b3d4731edbb 64 // Not a good idea to call this unless NO interrupt at all
WFKnight 0:9b3d4731edbb 65 // is under the control of the handler; otherwise, a system crash
WFKnight 0:9b3d4731edbb 66 // is very likely to occur
WFKnight 0:9b3d4731edbb 67 if (NULL != _instance) {
WFKnight 0:9b3d4731edbb 68 delete _instance;
WFKnight 0:9b3d4731edbb 69 _instance = (InterruptManager*)NULL;
WFKnight 0:9b3d4731edbb 70 }
WFKnight 0:9b3d4731edbb 71 }
WFKnight 0:9b3d4731edbb 72
WFKnight 0:9b3d4731edbb 73 InterruptManager::~InterruptManager() {
WFKnight 0:9b3d4731edbb 74 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
WFKnight 0:9b3d4731edbb 75 if (NULL != _chains[i])
WFKnight 0:9b3d4731edbb 76 delete _chains[i];
WFKnight 0:9b3d4731edbb 77 }
WFKnight 0:9b3d4731edbb 78
WFKnight 0:9b3d4731edbb 79 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
WFKnight 0:9b3d4731edbb 80 lock();
WFKnight 0:9b3d4731edbb 81
WFKnight 0:9b3d4731edbb 82 int ret = false;
WFKnight 0:9b3d4731edbb 83 int irq_pos = get_irq_index(irq);
WFKnight 0:9b3d4731edbb 84 if (NULL == _chains[irq_pos]) {
WFKnight 0:9b3d4731edbb 85 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
WFKnight 0:9b3d4731edbb 86 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
WFKnight 0:9b3d4731edbb 87 ret = true;
WFKnight 0:9b3d4731edbb 88 }
WFKnight 0:9b3d4731edbb 89 unlock();
WFKnight 0:9b3d4731edbb 90 return ret;
WFKnight 0:9b3d4731edbb 91 }
WFKnight 0:9b3d4731edbb 92
WFKnight 0:9b3d4731edbb 93 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
WFKnight 0:9b3d4731edbb 94 lock();
WFKnight 0:9b3d4731edbb 95 int irq_pos = get_irq_index(irq);
WFKnight 0:9b3d4731edbb 96 bool change = must_replace_vector(irq);
WFKnight 0:9b3d4731edbb 97
WFKnight 0:9b3d4731edbb 98 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
WFKnight 0:9b3d4731edbb 99 if (change)
WFKnight 0:9b3d4731edbb 100 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
WFKnight 0:9b3d4731edbb 101 unlock();
WFKnight 0:9b3d4731edbb 102 return pf;
WFKnight 0:9b3d4731edbb 103 }
WFKnight 0:9b3d4731edbb 104
WFKnight 0:9b3d4731edbb 105 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
WFKnight 0:9b3d4731edbb 106 int irq_pos = get_irq_index(irq);
WFKnight 0:9b3d4731edbb 107 bool ret = false;
WFKnight 0:9b3d4731edbb 108
WFKnight 0:9b3d4731edbb 109 lock();
WFKnight 0:9b3d4731edbb 110 if (_chains[irq_pos] != NULL) {
WFKnight 0:9b3d4731edbb 111 if (_chains[irq_pos]->remove(handler)) {
WFKnight 0:9b3d4731edbb 112 ret = true;
WFKnight 0:9b3d4731edbb 113 }
WFKnight 0:9b3d4731edbb 114 }
WFKnight 0:9b3d4731edbb 115 unlock();
WFKnight 0:9b3d4731edbb 116
WFKnight 0:9b3d4731edbb 117 return ret;
WFKnight 0:9b3d4731edbb 118 }
WFKnight 0:9b3d4731edbb 119
WFKnight 0:9b3d4731edbb 120 void InterruptManager::irq_helper() {
WFKnight 0:9b3d4731edbb 121 _chains[__get_IPSR()]->call();
WFKnight 0:9b3d4731edbb 122 }
WFKnight 0:9b3d4731edbb 123
WFKnight 0:9b3d4731edbb 124 int InterruptManager::get_irq_index(IRQn_Type irq) {
WFKnight 0:9b3d4731edbb 125 // Pure function - no lock needed
WFKnight 0:9b3d4731edbb 126 return (int)irq + NVIC_USER_IRQ_OFFSET;
WFKnight 0:9b3d4731edbb 127 }
WFKnight 0:9b3d4731edbb 128
WFKnight 0:9b3d4731edbb 129 void InterruptManager::static_irq_helper() {
WFKnight 0:9b3d4731edbb 130 InterruptManager::get()->irq_helper();
WFKnight 0:9b3d4731edbb 131 }
WFKnight 0:9b3d4731edbb 132
WFKnight 0:9b3d4731edbb 133 void InterruptManager::lock() {
WFKnight 0:9b3d4731edbb 134 _mutex.lock();
WFKnight 0:9b3d4731edbb 135 }
WFKnight 0:9b3d4731edbb 136
WFKnight 0:9b3d4731edbb 137 void InterruptManager::unlock() {
WFKnight 0:9b3d4731edbb 138 _mutex.unlock();
WFKnight 0:9b3d4731edbb 139 }
WFKnight 0:9b3d4731edbb 140
WFKnight 0:9b3d4731edbb 141 } // namespace mbed
WFKnight 0:9b3d4731edbb 142
WFKnight 0:9b3d4731edbb 143 #endif