OneM2M / DTLSSocket_29

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timing_alt.h@0:5f745af3ec9b, 2019-08-23 (annotated)

Committer:
ImranBilalButt
Date:
Fri Aug 23 13:29:35 2019 +0000
Revision:
0:5f745af3ec9b
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ImranBilalButt 0:5f745af3ec9b 1 /**
ImranBilalButt 0:5f745af3ec9b 2 * \file timing.h
ImranBilalButt 0:5f745af3ec9b 3 *
ImranBilalButt 0:5f745af3ec9b 4 * \brief Portable interface to timeouts and to the CPU cycle counter
ImranBilalButt 0:5f745af3ec9b 5 */
ImranBilalButt 0:5f745af3ec9b 6 /*
ImranBilalButt 0:5f745af3ec9b 7 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
ImranBilalButt 0:5f745af3ec9b 8 * SPDX-License-Identifier: Apache-2.0
ImranBilalButt 0:5f745af3ec9b 9 *
ImranBilalButt 0:5f745af3ec9b 10 * Licensed under the Apache License, Version 2.0 (the "License"); you may
ImranBilalButt 0:5f745af3ec9b 11 * not use this file except in compliance with the License.
ImranBilalButt 0:5f745af3ec9b 12 * You may obtain a copy of the License at
ImranBilalButt 0:5f745af3ec9b 13 *
ImranBilalButt 0:5f745af3ec9b 14 * http://www.apache.org/licenses/LICENSE-2.0
ImranBilalButt 0:5f745af3ec9b 15 *
ImranBilalButt 0:5f745af3ec9b 16 * Unless required by applicable law or agreed to in writing, software
ImranBilalButt 0:5f745af3ec9b 17 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
ImranBilalButt 0:5f745af3ec9b 18 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ImranBilalButt 0:5f745af3ec9b 19 * See the License for the specific language governing permissions and
ImranBilalButt 0:5f745af3ec9b 20 * limitations under the License.
ImranBilalButt 0:5f745af3ec9b 21 *
ImranBilalButt 0:5f745af3ec9b 22 * This file is part of mbed TLS (https://tls.mbed.org)
ImranBilalButt 0:5f745af3ec9b 23 */
ImranBilalButt 0:5f745af3ec9b 24 //#ifndef MBEDTLS_TIMING_H
ImranBilalButt 0:5f745af3ec9b 25 //#define MBEDTLS_TIMING_H
ImranBilalButt 0:5f745af3ec9b 26
ImranBilalButt 0:5f745af3ec9b 27 //#if !defined(MBEDTLS_CONFIG_FILE)
ImranBilalButt 0:5f745af3ec9b 28 //#include "config.h"
ImranBilalButt 0:5f745af3ec9b 29 //#else
ImranBilalButt 0:5f745af3ec9b 30 //#include MBEDTLS_CONFIG_FILE
ImranBilalButt 0:5f745af3ec9b 31 //#endif
ImranBilalButt 0:5f745af3ec9b 32
ImranBilalButt 0:5f745af3ec9b 33 #include <stdint.h>
ImranBilalButt 0:5f745af3ec9b 34
ImranBilalButt 0:5f745af3ec9b 35 //#ifdef __cplusplus
ImranBilalButt 0:5f745af3ec9b 36 //extern "C" {
ImranBilalButt 0:5f745af3ec9b 37 //#endif
ImranBilalButt 0:5f745af3ec9b 38
ImranBilalButt 0:5f745af3ec9b 39 // Regular implementation
ImranBilalButt 0:5f745af3ec9b 40 //
ImranBilalButt 0:5f745af3ec9b 41
ImranBilalButt 0:5f745af3ec9b 42 /**
ImranBilalButt 0:5f745af3ec9b 43 * \brief timer structure
ImranBilalButt 0:5f745af3ec9b 44 */
ImranBilalButt 0:5f745af3ec9b 45 /*struct mbedtls_timing_hr_time
ImranBilalButt 0:5f745af3ec9b 46 {
ImranBilalButt 0:5f745af3ec9b 47 unsigned char opaque[32];
ImranBilalButt 0:5f745af3ec9b 48 }; */
ImranBilalButt 0:5f745af3ec9b 49
ImranBilalButt 0:5f745af3ec9b 50 #include "mbed.h"
ImranBilalButt 0:5f745af3ec9b 51 //#include <Timer.h>
ImranBilalButt 0:5f745af3ec9b 52
ImranBilalButt 0:5f745af3ec9b 53 //Timer *timer;
ImranBilalButt 0:5f745af3ec9b 54 //uint32_t start, now;
ImranBilalButt 0:5f745af3ec9b 55 /**
ImranBilalButt 0:5f745af3ec9b 56 * \brief Context for mbedtls_timing_set/get_delay()
ImranBilalButt 0:5f745af3ec9b 57 */
ImranBilalButt 0:5f745af3ec9b 58 //timer->start();
ImranBilalButt 0:5f745af3ec9b 59 /*
ImranBilalButt 0:5f745af3ec9b 60 struct dtls_timer_context {
ImranBilalButt 0:5f745af3ec9b 61 Timer *timer;
ImranBilalButt 0:5f745af3ec9b 62 uint32_t int_ms;
ImranBilalButt 0:5f745af3ec9b 63 uint32_t fin_ms;
ImranBilalButt 0:5f745af3ec9b 64 uint32_t now, start;
ImranBilalButt 0:5f745af3ec9b 65 }; */
ImranBilalButt 0:5f745af3ec9b 66
ImranBilalButt 0:5f745af3ec9b 67 //Timer timer;
ImranBilalButt 0:5f745af3ec9b 68
ImranBilalButt 0:5f745af3ec9b 69 typedef struct mbedtls_timing_delay_context
ImranBilalButt 0:5f745af3ec9b 70 {
ImranBilalButt 0:5f745af3ec9b 71 uint32_t now, ref;
ImranBilalButt 0:5f745af3ec9b 72 //mbedtls_timing_hr_time _hr_time;
ImranBilalButt 0:5f745af3ec9b 73 uint32_t int_ms;
ImranBilalButt 0:5f745af3ec9b 74 uint32_t fin_ms;
ImranBilalButt 0:5f745af3ec9b 75 };
ImranBilalButt 0:5f745af3ec9b 76
ImranBilalButt 0:5f745af3ec9b 77
ImranBilalButt 0:5f745af3ec9b 78 //extern volatile int mbedtls_timing_alarmed;
ImranBilalButt 0:5f745af3ec9b 79
ImranBilalButt 0:5f745af3ec9b 80 /**
ImranBilalButt 0:5f745af3ec9b 81 * \brief Return the CPU cycle counter value
ImranBilalButt 0:5f745af3ec9b 82 *
ImranBilalButt 0:5f745af3ec9b 83 * \warning This is only a best effort! Do not rely on this!
ImranBilalButt 0:5f745af3ec9b 84 * In particular, it is known to be unreliable on virtual
ImranBilalButt 0:5f745af3ec9b 85 * machines.
ImranBilalButt 0:5f745af3ec9b 86 *
ImranBilalButt 0:5f745af3ec9b 87 * \note This value starts at an unspecified origin and
ImranBilalButt 0:5f745af3ec9b 88 * may wrap around.
ImranBilalButt 0:5f745af3ec9b 89 */
ImranBilalButt 0:5f745af3ec9b 90 //unsigned long mbedtls_timing_hardclock( void ){
ImranBilalButt 0:5f745af3ec9b 91
ImranBilalButt 0:5f745af3ec9b 92 //};
ImranBilalButt 0:5f745af3ec9b 93
ImranBilalButt 0:5f745af3ec9b 94 /**
ImranBilalButt 0:5f745af3ec9b 95 * \brief Return the elapsed time in milliseconds
ImranBilalButt 0:5f745af3ec9b 96 *
ImranBilalButt 0:5f745af3ec9b 97 * \param val points to a timer structure
ImranBilalButt 0:5f745af3ec9b 98 * \param reset If 0, query the elapsed time. Otherwise (re)start the timer.
ImranBilalButt 0:5f745af3ec9b 99 *
ImranBilalButt 0:5f745af3ec9b 100 * \return Elapsed time since the previous reset in ms. When
ImranBilalButt 0:5f745af3ec9b 101 * restarting, this is always 0.
ImranBilalButt 0:5f745af3ec9b 102 *
ImranBilalButt 0:5f745af3ec9b 103 * \note To initialize a timer, call this function with reset=1.
ImranBilalButt 0:5f745af3ec9b 104 *
ImranBilalButt 0:5f745af3ec9b 105 * Determining the elapsed time and resetting the timer is not
ImranBilalButt 0:5f745af3ec9b 106 * atomic on all platforms, so after the sequence
ImranBilalButt 0:5f745af3ec9b 107 * `{ get_timer(1); ...; time1 = get_timer(1); ...; time2 =
ImranBilalButt 0:5f745af3ec9b 108 * get_timer(0) }` the value time1+time2 is only approximately
ImranBilalButt 0:5f745af3ec9b 109 * the delay since the first reset.
ImranBilalButt 0:5f745af3ec9b 110 */
ImranBilalButt 0:5f745af3ec9b 111 /*unsigned long mbedtls_timing_get_timer( mbedtls_timing_hr_time *val, int reset ){
ImranBilalButt 0:5f745af3ec9b 112 if (reset) {
ImranBilalButt 0:5f745af3ec9b 113
ImranBilalButt 0:5f745af3ec9b 114 }
ImranBilalButt 0:5f745af3ec9b 115 else {
ImranBilalButt 0:5f745af3ec9b 116
ImranBilalButt 0:5f745af3ec9b 117 }
ImranBilalButt 0:5f745af3ec9b 118 }; */
ImranBilalButt 0:5f745af3ec9b 119
ImranBilalButt 0:5f745af3ec9b 120 /**
ImranBilalButt 0:5f745af3ec9b 121 * \brief Setup an alarm clock
ImranBilalButt 0:5f745af3ec9b 122 *
ImranBilalButt 0:5f745af3ec9b 123 * \param seconds delay before the "mbedtls_timing_alarmed" flag is set
ImranBilalButt 0:5f745af3ec9b 124 * (must be >=0)
ImranBilalButt 0:5f745af3ec9b 125 *
ImranBilalButt 0:5f745af3ec9b 126 * \warning Only one alarm at a time is supported. In a threaded
ImranBilalButt 0:5f745af3ec9b 127 * context, this means one for the whole process, not one per
ImranBilalButt 0:5f745af3ec9b 128 * thread.
ImranBilalButt 0:5f745af3ec9b 129 */
ImranBilalButt 0:5f745af3ec9b 130 //void mbedtls_set_alarm( int seconds );
ImranBilalButt 0:5f745af3ec9b 131
ImranBilalButt 0:5f745af3ec9b 132 /**
ImranBilalButt 0:5f745af3ec9b 133 * \brief Set a pair of delays to watch
ImranBilalButt 0:5f745af3ec9b 134 * (See \c mbedtls_timing_get_delay().)
ImranBilalButt 0:5f745af3ec9b 135 *
ImranBilalButt 0:5f745af3ec9b 136 * \param data Pointer to timing data.
ImranBilalButt 0:5f745af3ec9b 137 * Must point to a valid \c mbedtls_timing_delay_context struct.
ImranBilalButt 0:5f745af3ec9b 138 * \param int_ms First (intermediate) delay in milliseconds.
ImranBilalButt 0:5f745af3ec9b 139 * The effect if int_ms > fin_ms is unspecified.
ImranBilalButt 0:5f745af3ec9b 140 * \param fin_ms Second (final) delay in milliseconds.
ImranBilalButt 0:5f745af3ec9b 141 * Pass 0 to cancel the current delay.
ImranBilalButt 0:5f745af3ec9b 142 *
ImranBilalButt 0:5f745af3ec9b 143 * \note To set a single delay, either use \c mbedtls_timing_set_timer
ImranBilalButt 0:5f745af3ec9b 144 * directly or use this function with int_ms == fin_ms.
ImranBilalButt 0:5f745af3ec9b 145 */
ImranBilalButt 0:5f745af3ec9b 146 // set delays to watch
ImranBilalButt 0:5f745af3ec9b 147 void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms ){
ImranBilalButt 0:5f745af3ec9b 148
ImranBilalButt 0:5f745af3ec9b 149 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
ImranBilalButt 0:5f745af3ec9b 150 //dtls_timer_context *ctx = (dtls_timer_context *) data;
ImranBilalButt 0:5f745af3ec9b 151
ImranBilalButt 0:5f745af3ec9b 152 ctx->int_ms = int_ms;
ImranBilalButt 0:5f745af3ec9b 153 ctx->fin_ms = fin_ms;
ImranBilalButt 0:5f745af3ec9b 154
ImranBilalButt 0:5f745af3ec9b 155 printf("\nInitial delay time (ms) set: ctx->int_ms = %d\n", ctx->int_ms);
ImranBilalButt 0:5f745af3ec9b 156 printf("\nFinish delay time (ms) set: ctx->fin_ms = %d\n", ctx->fin_ms);
ImranBilalButt 0:5f745af3ec9b 157
ImranBilalButt 0:5f745af3ec9b 158 //timer.start();
ImranBilalButt 0:5f745af3ec9b 159 //printf("\ntimer.start() executed and timer.read_ms() = %d\n", timer.read_ms());
ImranBilalButt 0:5f745af3ec9b 160
ImranBilalButt 0:5f745af3ec9b 161 if( fin_ms != 0 ) {
ImranBilalButt 0:5f745af3ec9b 162 // reset = 1; get_timer(data, 1)
ImranBilalButt 0:5f745af3ec9b 163 // ref/start = put clocks
ImranBilalButt 0:5f745af3ec9b 164 ctx->ref = osKernelGetTickCount();
ImranBilalButt 0:5f745af3ec9b 165 printf("\nReference time set: ctx->ref = %d\n", ctx->ref);
ImranBilalButt 0:5f745af3ec9b 166 }
ImranBilalButt 0:5f745af3ec9b 167 };
ImranBilalButt 0:5f745af3ec9b 168
ImranBilalButt 0:5f745af3ec9b 169 /**
ImranBilalButt 0:5f745af3ec9b 170 * \brief Get the status of delays
ImranBilalButt 0:5f745af3ec9b 171 * (Memory helper: number of delays passed.)
ImranBilalButt 0:5f745af3ec9b 172 *
ImranBilalButt 0:5f745af3ec9b 173 * \param data Pointer to timing data
ImranBilalButt 0:5f745af3ec9b 174 * Must point to a valid \c mbedtls_timing_delay_context struct.
ImranBilalButt 0:5f745af3ec9b 175 *
ImranBilalButt 0:5f745af3ec9b 176 * \return -1 if cancelled (fin_ms = 0),
ImranBilalButt 0:5f745af3ec9b 177 * 0 if none of the delays are passed,
ImranBilalButt 0:5f745af3ec9b 178 * 1 if only the intermediate delay is passed,
ImranBilalButt 0:5f745af3ec9b 179 * 2 if the final delay is passed.
ImranBilalButt 0:5f745af3ec9b 180 */
ImranBilalButt 0:5f745af3ec9b 181 int mbedtls_timing_get_delay( void *data ){
ImranBilalButt 0:5f745af3ec9b 182
ImranBilalButt 0:5f745af3ec9b 183 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
ImranBilalButt 0:5f745af3ec9b 184 //dtls_timer_context *ctx = (dtls_timer_context *) data;
ImranBilalButt 0:5f745af3ec9b 185
ImranBilalButt 0:5f745af3ec9b 186 unsigned long elapsed_ms;
ImranBilalButt 0:5f745af3ec9b 187
ImranBilalButt 0:5f745af3ec9b 188 if( ctx->fin_ms == 0 ) {
ImranBilalButt 0:5f745af3ec9b 189 printf("\n Timer has been reset, returned -1\n");
ImranBilalButt 0:5f745af3ec9b 190 return( -1 );
ImranBilalButt 0:5f745af3ec9b 191 }
ImranBilalButt 0:5f745af3ec9b 192
ImranBilalButt 0:5f745af3ec9b 193 ctx->now = osKernelGetTickCount();
ImranBilalButt 0:5f745af3ec9b 194 elapsed_ms = ((ctx->now - ctx->ref) / osKernelGetTickFreq()) * 1000;
ImranBilalButt 0:5f745af3ec9b 195 printf("\nThe elapsed delay time (ms) is: elapsed_ms = %d %d\n", elapsed_ms, osKernelGetTickFreq());
ImranBilalButt 0:5f745af3ec9b 196
ImranBilalButt 0:5f745af3ec9b 197 if( elapsed_ms >= ctx->fin_ms ) {
ImranBilalButt 0:5f745af3ec9b 198 printf("\nFlight delay-Time has been over-delayed, returned 2\n");
ImranBilalButt 0:5f745af3ec9b 199 return( 2 );
ImranBilalButt 0:5f745af3ec9b 200 }
ImranBilalButt 0:5f745af3ec9b 201
ImranBilalButt 0:5f745af3ec9b 202 if( elapsed_ms >= ctx->int_ms ) {
ImranBilalButt 0:5f745af3ec9b 203 printf("\nOnly the intermediate delay is passed, returned 1\n");
ImranBilalButt 0:5f745af3ec9b 204 return( 1 );
ImranBilalButt 0:5f745af3ec9b 205 }
ImranBilalButt 0:5f745af3ec9b 206
ImranBilalButt 0:5f745af3ec9b 207 printf("\nNo delay is been passed, returned 0\n");
ImranBilalButt 0:5f745af3ec9b 208 return( 0 );
ImranBilalButt 0:5f745af3ec9b 209 };
ImranBilalButt 0:5f745af3ec9b 210
ImranBilalButt 0:5f745af3ec9b 211 //#if defined(MBEDTLS_SELF_TEST)
ImranBilalButt 0:5f745af3ec9b 212 /**
ImranBilalButt 0:5f745af3ec9b 213 * \brief Checkup routine
ImranBilalButt 0:5f745af3ec9b 214 *
ImranBilalButt 0:5f745af3ec9b 215 * \return 0 if successful, or 1 if a test failed
ImranBilalButt 0:5f745af3ec9b 216 */
ImranBilalButt 0:5f745af3ec9b 217 //int mbedtls_timing_self_test( int verbose );
ImranBilalButt 0:5f745af3ec9b 218 //#endif
ImranBilalButt 0:5f745af3ec9b 219
ImranBilalButt 0:5f745af3ec9b 220 //#ifdef __cplusplus
ImranBilalButt 0:5f745af3ec9b 221 //}
ImranBilalButt 0:5f745af3ec9b 222 //#endif
ImranBilalButt 0:5f745af3ec9b 223
ImranBilalButt 0:5f745af3ec9b 224 //#endif /* timing.h */