4. An implementation of the system as thread(s) written in protothread style, plus additional code that monitors the serial port and touch sensors, and dispatches them to the threads.
pt.h@0:3667ad9a98cc, 2010-11-30 (annotated)
- Committer:
- manujose
- Date:
- Tue Nov 30 22:02:03 2010 +0000
- Revision:
- 0:3667ad9a98cc
protothreads
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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manujose | 0:3667ad9a98cc | 1 | /* |
manujose | 0:3667ad9a98cc | 2 | * Copyright (c) 2004-2005, Swedish Institute of Computer Science. |
manujose | 0:3667ad9a98cc | 3 | * All rights reserved. |
manujose | 0:3667ad9a98cc | 4 | * |
manujose | 0:3667ad9a98cc | 5 | * Redistribution and use in source and binary forms, with or without |
manujose | 0:3667ad9a98cc | 6 | * modification, are permitted provided that the following conditions |
manujose | 0:3667ad9a98cc | 7 | * are met: |
manujose | 0:3667ad9a98cc | 8 | * 1. Redistributions of source code must retain the above copyright |
manujose | 0:3667ad9a98cc | 9 | * notice, this list of conditions and the following disclaimer. |
manujose | 0:3667ad9a98cc | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
manujose | 0:3667ad9a98cc | 11 | * notice, this list of conditions and the following disclaimer in the |
manujose | 0:3667ad9a98cc | 12 | * documentation and/or other materials provided with the distribution. |
manujose | 0:3667ad9a98cc | 13 | * 3. Neither the name of the Institute nor the names of its contributors |
manujose | 0:3667ad9a98cc | 14 | * may be used to endorse or promote products derived from this software |
manujose | 0:3667ad9a98cc | 15 | * without specific prior written permission. |
manujose | 0:3667ad9a98cc | 16 | * |
manujose | 0:3667ad9a98cc | 17 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
manujose | 0:3667ad9a98cc | 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
manujose | 0:3667ad9a98cc | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
manujose | 0:3667ad9a98cc | 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
manujose | 0:3667ad9a98cc | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
manujose | 0:3667ad9a98cc | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
manujose | 0:3667ad9a98cc | 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
manujose | 0:3667ad9a98cc | 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
manujose | 0:3667ad9a98cc | 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
manujose | 0:3667ad9a98cc | 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
manujose | 0:3667ad9a98cc | 27 | * SUCH DAMAGE. |
manujose | 0:3667ad9a98cc | 28 | * |
manujose | 0:3667ad9a98cc | 29 | * This file is part of the Contiki operating system. |
manujose | 0:3667ad9a98cc | 30 | * |
manujose | 0:3667ad9a98cc | 31 | * Author: Adam Dunkels <adam@sics.se> |
manujose | 0:3667ad9a98cc | 32 | * |
manujose | 0:3667ad9a98cc | 33 | * $Id: pt.h,v 1.7 2006/10/02 07:52:56 adam Exp $ |
manujose | 0:3667ad9a98cc | 34 | */ |
manujose | 0:3667ad9a98cc | 35 | |
manujose | 0:3667ad9a98cc | 36 | /** |
manujose | 0:3667ad9a98cc | 37 | * \addtogroup pt |
manujose | 0:3667ad9a98cc | 38 | * @{ |
manujose | 0:3667ad9a98cc | 39 | */ |
manujose | 0:3667ad9a98cc | 40 | |
manujose | 0:3667ad9a98cc | 41 | /** |
manujose | 0:3667ad9a98cc | 42 | * \file |
manujose | 0:3667ad9a98cc | 43 | * Protothreads implementation. |
manujose | 0:3667ad9a98cc | 44 | * \author |
manujose | 0:3667ad9a98cc | 45 | * Adam Dunkels <adam@sics.se> |
manujose | 0:3667ad9a98cc | 46 | * |
manujose | 0:3667ad9a98cc | 47 | */ |
manujose | 0:3667ad9a98cc | 48 | |
manujose | 0:3667ad9a98cc | 49 | #ifndef __PT_H__ |
manujose | 0:3667ad9a98cc | 50 | #define __PT_H__ |
manujose | 0:3667ad9a98cc | 51 | |
manujose | 0:3667ad9a98cc | 52 | #include "lc.h" |
manujose | 0:3667ad9a98cc | 53 | |
manujose | 0:3667ad9a98cc | 54 | struct pt { |
manujose | 0:3667ad9a98cc | 55 | lc_t lc; |
manujose | 0:3667ad9a98cc | 56 | }; |
manujose | 0:3667ad9a98cc | 57 | |
manujose | 0:3667ad9a98cc | 58 | #define PT_WAITING 0 |
manujose | 0:3667ad9a98cc | 59 | #define PT_YIELDED 1 |
manujose | 0:3667ad9a98cc | 60 | #define PT_EXITED 2 |
manujose | 0:3667ad9a98cc | 61 | #define PT_ENDED 3 |
manujose | 0:3667ad9a98cc | 62 | |
manujose | 0:3667ad9a98cc | 63 | /** |
manujose | 0:3667ad9a98cc | 64 | * \name Initialization |
manujose | 0:3667ad9a98cc | 65 | * @{ |
manujose | 0:3667ad9a98cc | 66 | */ |
manujose | 0:3667ad9a98cc | 67 | |
manujose | 0:3667ad9a98cc | 68 | /** |
manujose | 0:3667ad9a98cc | 69 | * Initialize a protothread. |
manujose | 0:3667ad9a98cc | 70 | * |
manujose | 0:3667ad9a98cc | 71 | * Initializes a protothread. Initialization must be done prior to |
manujose | 0:3667ad9a98cc | 72 | * starting to execute the protothread. |
manujose | 0:3667ad9a98cc | 73 | * |
manujose | 0:3667ad9a98cc | 74 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 75 | * |
manujose | 0:3667ad9a98cc | 76 | * \sa PT_SPAWN() |
manujose | 0:3667ad9a98cc | 77 | * |
manujose | 0:3667ad9a98cc | 78 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 79 | */ |
manujose | 0:3667ad9a98cc | 80 | #define PT_INIT(pt) LC_INIT((pt)->lc) |
manujose | 0:3667ad9a98cc | 81 | |
manujose | 0:3667ad9a98cc | 82 | /** @} */ |
manujose | 0:3667ad9a98cc | 83 | |
manujose | 0:3667ad9a98cc | 84 | /** |
manujose | 0:3667ad9a98cc | 85 | * \name Declaration and definition |
manujose | 0:3667ad9a98cc | 86 | * @{ |
manujose | 0:3667ad9a98cc | 87 | */ |
manujose | 0:3667ad9a98cc | 88 | |
manujose | 0:3667ad9a98cc | 89 | /** |
manujose | 0:3667ad9a98cc | 90 | * Declaration of a protothread. |
manujose | 0:3667ad9a98cc | 91 | * |
manujose | 0:3667ad9a98cc | 92 | * This macro is used to declare a protothread. All protothreads must |
manujose | 0:3667ad9a98cc | 93 | * be declared with this macro. |
manujose | 0:3667ad9a98cc | 94 | * |
manujose | 0:3667ad9a98cc | 95 | * \param name_args The name and arguments of the C function |
manujose | 0:3667ad9a98cc | 96 | * implementing the protothread. |
manujose | 0:3667ad9a98cc | 97 | * |
manujose | 0:3667ad9a98cc | 98 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 99 | */ |
manujose | 0:3667ad9a98cc | 100 | #define PT_THREAD(name_args) char name_args |
manujose | 0:3667ad9a98cc | 101 | |
manujose | 0:3667ad9a98cc | 102 | /** |
manujose | 0:3667ad9a98cc | 103 | * Declare the start of a protothread inside the C function |
manujose | 0:3667ad9a98cc | 104 | * implementing the protothread. |
manujose | 0:3667ad9a98cc | 105 | * |
manujose | 0:3667ad9a98cc | 106 | * This macro is used to declare the starting point of a |
manujose | 0:3667ad9a98cc | 107 | * protothread. It should be placed at the start of the function in |
manujose | 0:3667ad9a98cc | 108 | * which the protothread runs. All C statements above the PT_BEGIN() |
manujose | 0:3667ad9a98cc | 109 | * invokation will be executed each time the protothread is scheduled. |
manujose | 0:3667ad9a98cc | 110 | * |
manujose | 0:3667ad9a98cc | 111 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 112 | * |
manujose | 0:3667ad9a98cc | 113 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 114 | */ |
manujose | 0:3667ad9a98cc | 115 | #define PT_BEGIN(pt) { char PT_YIELD_FLAG = 1; LC_RESUME((pt)->lc) |
manujose | 0:3667ad9a98cc | 116 | |
manujose | 0:3667ad9a98cc | 117 | /** |
manujose | 0:3667ad9a98cc | 118 | * Declare the end of a protothread. |
manujose | 0:3667ad9a98cc | 119 | * |
manujose | 0:3667ad9a98cc | 120 | * This macro is used for declaring that a protothread ends. It must |
manujose | 0:3667ad9a98cc | 121 | * always be used together with a matching PT_BEGIN() macro. |
manujose | 0:3667ad9a98cc | 122 | * |
manujose | 0:3667ad9a98cc | 123 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 124 | * |
manujose | 0:3667ad9a98cc | 125 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 126 | */ |
manujose | 0:3667ad9a98cc | 127 | #define PT_END(pt) LC_END((pt)->lc); PT_YIELD_FLAG = 0; \ |
manujose | 0:3667ad9a98cc | 128 | PT_INIT(pt); return PT_ENDED; } |
manujose | 0:3667ad9a98cc | 129 | |
manujose | 0:3667ad9a98cc | 130 | /** @} */ |
manujose | 0:3667ad9a98cc | 131 | |
manujose | 0:3667ad9a98cc | 132 | /** |
manujose | 0:3667ad9a98cc | 133 | * \name Blocked wait |
manujose | 0:3667ad9a98cc | 134 | * @{ |
manujose | 0:3667ad9a98cc | 135 | */ |
manujose | 0:3667ad9a98cc | 136 | |
manujose | 0:3667ad9a98cc | 137 | /** |
manujose | 0:3667ad9a98cc | 138 | * Block and wait until condition is true. |
manujose | 0:3667ad9a98cc | 139 | * |
manujose | 0:3667ad9a98cc | 140 | * This macro blocks the protothread until the specified condition is |
manujose | 0:3667ad9a98cc | 141 | * true. |
manujose | 0:3667ad9a98cc | 142 | * |
manujose | 0:3667ad9a98cc | 143 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 144 | * \param condition The condition. |
manujose | 0:3667ad9a98cc | 145 | * |
manujose | 0:3667ad9a98cc | 146 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 147 | */ |
manujose | 0:3667ad9a98cc | 148 | #define PT_WAIT_UNTIL(pt, condition) \ |
manujose | 0:3667ad9a98cc | 149 | do { \ |
manujose | 0:3667ad9a98cc | 150 | LC_SET((pt)->lc); \ |
manujose | 0:3667ad9a98cc | 151 | if(!(condition)) { \ |
manujose | 0:3667ad9a98cc | 152 | return PT_WAITING; \ |
manujose | 0:3667ad9a98cc | 153 | } \ |
manujose | 0:3667ad9a98cc | 154 | } while(0) |
manujose | 0:3667ad9a98cc | 155 | |
manujose | 0:3667ad9a98cc | 156 | /** |
manujose | 0:3667ad9a98cc | 157 | * Block and wait while condition is true. |
manujose | 0:3667ad9a98cc | 158 | * |
manujose | 0:3667ad9a98cc | 159 | * This function blocks and waits while condition is true. See |
manujose | 0:3667ad9a98cc | 160 | * PT_WAIT_UNTIL(). |
manujose | 0:3667ad9a98cc | 161 | * |
manujose | 0:3667ad9a98cc | 162 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 163 | * \param cond The condition. |
manujose | 0:3667ad9a98cc | 164 | * |
manujose | 0:3667ad9a98cc | 165 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 166 | */ |
manujose | 0:3667ad9a98cc | 167 | #define PT_WAIT_WHILE(pt, cond) PT_WAIT_UNTIL((pt), !(cond)) |
manujose | 0:3667ad9a98cc | 168 | |
manujose | 0:3667ad9a98cc | 169 | /** @} */ |
manujose | 0:3667ad9a98cc | 170 | |
manujose | 0:3667ad9a98cc | 171 | /** |
manujose | 0:3667ad9a98cc | 172 | * \name Hierarchical protothreads |
manujose | 0:3667ad9a98cc | 173 | * @{ |
manujose | 0:3667ad9a98cc | 174 | */ |
manujose | 0:3667ad9a98cc | 175 | |
manujose | 0:3667ad9a98cc | 176 | /** |
manujose | 0:3667ad9a98cc | 177 | * Block and wait until a child protothread completes. |
manujose | 0:3667ad9a98cc | 178 | * |
manujose | 0:3667ad9a98cc | 179 | * This macro schedules a child protothread. The current protothread |
manujose | 0:3667ad9a98cc | 180 | * will block until the child protothread completes. |
manujose | 0:3667ad9a98cc | 181 | * |
manujose | 0:3667ad9a98cc | 182 | * \note The child protothread must be manually initialized with the |
manujose | 0:3667ad9a98cc | 183 | * PT_INIT() function before this function is used. |
manujose | 0:3667ad9a98cc | 184 | * |
manujose | 0:3667ad9a98cc | 185 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 186 | * \param thread The child protothread with arguments |
manujose | 0:3667ad9a98cc | 187 | * |
manujose | 0:3667ad9a98cc | 188 | * \sa PT_SPAWN() |
manujose | 0:3667ad9a98cc | 189 | * |
manujose | 0:3667ad9a98cc | 190 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 191 | */ |
manujose | 0:3667ad9a98cc | 192 | #define PT_WAIT_THREAD(pt, thread) PT_WAIT_WHILE((pt), PT_SCHEDULE(thread)) |
manujose | 0:3667ad9a98cc | 193 | |
manujose | 0:3667ad9a98cc | 194 | /** |
manujose | 0:3667ad9a98cc | 195 | * Spawn a child protothread and wait until it exits. |
manujose | 0:3667ad9a98cc | 196 | * |
manujose | 0:3667ad9a98cc | 197 | * This macro spawns a child protothread and waits until it exits. The |
manujose | 0:3667ad9a98cc | 198 | * macro can only be used within a protothread. |
manujose | 0:3667ad9a98cc | 199 | * |
manujose | 0:3667ad9a98cc | 200 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 201 | * \param child A pointer to the child protothread's control structure. |
manujose | 0:3667ad9a98cc | 202 | * \param thread The child protothread with arguments |
manujose | 0:3667ad9a98cc | 203 | * |
manujose | 0:3667ad9a98cc | 204 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 205 | */ |
manujose | 0:3667ad9a98cc | 206 | #define PT_SPAWN(pt, child, thread) \ |
manujose | 0:3667ad9a98cc | 207 | do { \ |
manujose | 0:3667ad9a98cc | 208 | PT_INIT((child)); \ |
manujose | 0:3667ad9a98cc | 209 | PT_WAIT_THREAD((pt), (thread)); \ |
manujose | 0:3667ad9a98cc | 210 | } while(0) |
manujose | 0:3667ad9a98cc | 211 | |
manujose | 0:3667ad9a98cc | 212 | /** @} */ |
manujose | 0:3667ad9a98cc | 213 | |
manujose | 0:3667ad9a98cc | 214 | /** |
manujose | 0:3667ad9a98cc | 215 | * \name Exiting and restarting |
manujose | 0:3667ad9a98cc | 216 | * @{ |
manujose | 0:3667ad9a98cc | 217 | */ |
manujose | 0:3667ad9a98cc | 218 | |
manujose | 0:3667ad9a98cc | 219 | /** |
manujose | 0:3667ad9a98cc | 220 | * Restart the protothread. |
manujose | 0:3667ad9a98cc | 221 | * |
manujose | 0:3667ad9a98cc | 222 | * This macro will block and cause the running protothread to restart |
manujose | 0:3667ad9a98cc | 223 | * its execution at the place of the PT_BEGIN() call. |
manujose | 0:3667ad9a98cc | 224 | * |
manujose | 0:3667ad9a98cc | 225 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 226 | * |
manujose | 0:3667ad9a98cc | 227 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 228 | */ |
manujose | 0:3667ad9a98cc | 229 | #define PT_RESTART(pt) \ |
manujose | 0:3667ad9a98cc | 230 | do { \ |
manujose | 0:3667ad9a98cc | 231 | PT_INIT(pt); \ |
manujose | 0:3667ad9a98cc | 232 | return PT_WAITING; \ |
manujose | 0:3667ad9a98cc | 233 | } while(0) |
manujose | 0:3667ad9a98cc | 234 | |
manujose | 0:3667ad9a98cc | 235 | /** |
manujose | 0:3667ad9a98cc | 236 | * Exit the protothread. |
manujose | 0:3667ad9a98cc | 237 | * |
manujose | 0:3667ad9a98cc | 238 | * This macro causes the protothread to exit. If the protothread was |
manujose | 0:3667ad9a98cc | 239 | * spawned by another protothread, the parent protothread will become |
manujose | 0:3667ad9a98cc | 240 | * unblocked and can continue to run. |
manujose | 0:3667ad9a98cc | 241 | * |
manujose | 0:3667ad9a98cc | 242 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 243 | * |
manujose | 0:3667ad9a98cc | 244 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 245 | */ |
manujose | 0:3667ad9a98cc | 246 | #define PT_EXIT(pt) \ |
manujose | 0:3667ad9a98cc | 247 | do { \ |
manujose | 0:3667ad9a98cc | 248 | PT_INIT(pt); \ |
manujose | 0:3667ad9a98cc | 249 | return PT_EXITED; \ |
manujose | 0:3667ad9a98cc | 250 | } while(0) |
manujose | 0:3667ad9a98cc | 251 | |
manujose | 0:3667ad9a98cc | 252 | /** @} */ |
manujose | 0:3667ad9a98cc | 253 | |
manujose | 0:3667ad9a98cc | 254 | /** |
manujose | 0:3667ad9a98cc | 255 | * \name Calling a protothread |
manujose | 0:3667ad9a98cc | 256 | * @{ |
manujose | 0:3667ad9a98cc | 257 | */ |
manujose | 0:3667ad9a98cc | 258 | |
manujose | 0:3667ad9a98cc | 259 | /** |
manujose | 0:3667ad9a98cc | 260 | * Schedule a protothread. |
manujose | 0:3667ad9a98cc | 261 | * |
manujose | 0:3667ad9a98cc | 262 | * This function shedules a protothread. The return value of the |
manujose | 0:3667ad9a98cc | 263 | * function is non-zero if the protothread is running or zero if the |
manujose | 0:3667ad9a98cc | 264 | * protothread has exited. |
manujose | 0:3667ad9a98cc | 265 | * |
manujose | 0:3667ad9a98cc | 266 | * \param f The call to the C function implementing the protothread to |
manujose | 0:3667ad9a98cc | 267 | * be scheduled |
manujose | 0:3667ad9a98cc | 268 | * |
manujose | 0:3667ad9a98cc | 269 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 270 | */ |
manujose | 0:3667ad9a98cc | 271 | #define PT_SCHEDULE(f) ((f) < PT_EXITED) |
manujose | 0:3667ad9a98cc | 272 | |
manujose | 0:3667ad9a98cc | 273 | /** @} */ |
manujose | 0:3667ad9a98cc | 274 | |
manujose | 0:3667ad9a98cc | 275 | /** |
manujose | 0:3667ad9a98cc | 276 | * \name Yielding from a protothread |
manujose | 0:3667ad9a98cc | 277 | * @{ |
manujose | 0:3667ad9a98cc | 278 | */ |
manujose | 0:3667ad9a98cc | 279 | |
manujose | 0:3667ad9a98cc | 280 | /** |
manujose | 0:3667ad9a98cc | 281 | * Yield from the current protothread. |
manujose | 0:3667ad9a98cc | 282 | * |
manujose | 0:3667ad9a98cc | 283 | * This function will yield the protothread, thereby allowing other |
manujose | 0:3667ad9a98cc | 284 | * processing to take place in the system. |
manujose | 0:3667ad9a98cc | 285 | * |
manujose | 0:3667ad9a98cc | 286 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 287 | * |
manujose | 0:3667ad9a98cc | 288 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 289 | */ |
manujose | 0:3667ad9a98cc | 290 | #define PT_YIELD(pt) \ |
manujose | 0:3667ad9a98cc | 291 | do { \ |
manujose | 0:3667ad9a98cc | 292 | PT_YIELD_FLAG = 0; \ |
manujose | 0:3667ad9a98cc | 293 | LC_SET((pt)->lc); \ |
manujose | 0:3667ad9a98cc | 294 | if(PT_YIELD_FLAG == 0) { \ |
manujose | 0:3667ad9a98cc | 295 | return PT_YIELDED; \ |
manujose | 0:3667ad9a98cc | 296 | } \ |
manujose | 0:3667ad9a98cc | 297 | } while(0) |
manujose | 0:3667ad9a98cc | 298 | |
manujose | 0:3667ad9a98cc | 299 | /** |
manujose | 0:3667ad9a98cc | 300 | * \brief Yield from the protothread until a condition occurs. |
manujose | 0:3667ad9a98cc | 301 | * \param pt A pointer to the protothread control structure. |
manujose | 0:3667ad9a98cc | 302 | * \param cond The condition. |
manujose | 0:3667ad9a98cc | 303 | * |
manujose | 0:3667ad9a98cc | 304 | * This function will yield the protothread, until the |
manujose | 0:3667ad9a98cc | 305 | * specified condition evaluates to true. |
manujose | 0:3667ad9a98cc | 306 | * |
manujose | 0:3667ad9a98cc | 307 | * |
manujose | 0:3667ad9a98cc | 308 | * \hideinitializer |
manujose | 0:3667ad9a98cc | 309 | */ |
manujose | 0:3667ad9a98cc | 310 | #define PT_YIELD_UNTIL(pt, cond) \ |
manujose | 0:3667ad9a98cc | 311 | do { \ |
manujose | 0:3667ad9a98cc | 312 | PT_YIELD_FLAG = 0; \ |
manujose | 0:3667ad9a98cc | 313 | LC_SET((pt)->lc); \ |
manujose | 0:3667ad9a98cc | 314 | if((PT_YIELD_FLAG == 0) || !(cond)) { \ |
manujose | 0:3667ad9a98cc | 315 | return PT_YIELDED; \ |
manujose | 0:3667ad9a98cc | 316 | } \ |
manujose | 0:3667ad9a98cc | 317 | } while(0) |
manujose | 0:3667ad9a98cc | 318 | |
manujose | 0:3667ad9a98cc | 319 | /** @} */ |
manujose | 0:3667ad9a98cc | 320 | |
manujose | 0:3667ad9a98cc | 321 | #endif /* __PT_H__ */ |
manujose | 0:3667ad9a98cc | 322 | |
manujose | 0:3667ad9a98cc | 323 | /** @} */ |