event.hpp (9758B)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 | /* Relacy Race Detector * Copyright (c) 2008-2010, Dmitry S. Vyukov * All rights reserved. * This software is provided AS-IS with no warranty, either express or implied. * This software is distributed under a license and may not be copied, * modified or distributed except as expressly authorized under the * terms of the license contained in the file LICENSE.TXT in this distribution. */ #ifndef RL_EVENT_HPP #define RL_EVENT_HPP #ifdef _MSC_VER # pragma once #endif #include "../base.hpp" #include "../context_base.hpp" #include "../sync_var.hpp" #include "../waitset.hpp" #include "semaphore.hpp" namespace rl { struct event_data { virtual void set(debug_info_param info) = 0; virtual void reset(debug_info_param info) = 0; virtual void pulse(debug_info_param info) = 0; virtual sema_wakeup_reason wait(bool try_wait, bool is_timed, debug_info_param info) = 0; virtual bool is_signaled(debug_info_param info) = 0; virtual void memory_acquire(debug_info_param info) = 0; virtual void* prepare_wait(debug_info_param info) = 0; virtual ~event_data() {} // just to calm down gcc }; template<thread_id_t thread_count> class event_data_impl : public event_data { public: event_data_impl(bool manual_reset, bool initial_state) : manual_reset_(manual_reset) , state_(initial_state) { } ~event_data_impl() { //!!! detect destuction with waiters } private: signature<0xdada1234> sign_; bool const manual_reset_; bool state_; waitset<thread_count> ws_; sync_var<thread_count> sync_; struct state_event { enum type { type_set, type_reset, type_pulse, }; event_data_impl* addr_; type type_; bool initial_state_; bool final_state_; thread_id_t unblocked_; void output(std::ostream& s) const { s << "<" << std::hex << addr_ << std::dec << "> event: "; if (type_set == type_) s << "set "; else if (type_reset == type_) s << "reset "; else s << "pulse "; s << "initial_state=" << initial_state_ << " final_state=" << final_state_; if (type_reset != type_) s << " unblocked=" << unblocked_; } }; virtual void set(debug_info_param info) { context& c = ctx(); c.sched(); sign_.check(info); bool initial_state = state_; thread_id_t unblocked = 0; if (state_) { //!!! probably can break if a thread waits in wfmo RL_VERIFY(false == ws_); } else { sync_.release(c.threadx_); state_ = true; if (manual_reset_) { unblocked = ws_.unpark_all(c, info); } else { if (ws_.unpark_one(c, info)) unblocked = 1; } } RL_HIST(state_event) {this, state_event::type_set, initial_state, state_, unblocked} RL_HIST_END(); } virtual void reset(debug_info_param info) { context& c = ctx(); c.sched(); sign_.check(info); bool initial_state = state_; if (state_) { RL_VERIFY(false == ws_); sync_.release(c.threadx_); state_ = false; } RL_HIST(state_event) {this, state_event::type_reset, initial_state, state_, 0} RL_HIST_END(); } virtual void pulse(debug_info_param info) { context& c = ctx(); c.sched(); sign_.check(info); //??? should I model nasty caveat described in MSDN thread_id_t unblocked = 0; if (state_) { //!!! probably can break if a thread waits in wfmo RL_VERIFY(false == ws_); } else { sync_.release(c.threadx_); state_ = true; unblocked = ws_.unpark_all(c, info); state_ = false; } RL_HIST(state_event) {this, state_event::type_pulse, state_, state_, unblocked} RL_HIST_END(); } struct wait_event { event_data_impl* addr_; bool try_wait_; bool is_timed_; bool initial_state_; bool final_state_; sema_wakeup_reason reason_; void output(std::ostream& s) const { s << "<" << std::hex << addr_ << std::dec << "> event: "; if (try_wait_) s << "try_wait "; else if (is_timed_) s << "timed wait "; else s << "wait "; if (reason_ == sema_wakeup_reason_success) s << "succeeded "; else if (reason_ == sema_wakeup_reason_failed) s << "failed "; else if (reason_ == sema_wakeup_reason_timeout) s << "timed out "; else if (reason_ == sema_wakeup_reason_spurious) s << "spuriously failed "; s << "initial_state=" << initial_state_ << " final_state=" << final_state_; } }; virtual sema_wakeup_reason wait(bool try_wait, bool is_timed, debug_info_param info) { context& c = ctx(); c.sched(); sign_.check(info); bool initial_state = state_; sema_wakeup_reason reason = sema_wakeup_reason_success; for (;;) { if (state_) { if (manual_reset_) { sync_.acquire(c.threadx_); } else { state_ = false; sync_.acq_rel(c.threadx_); } reason = sema_wakeup_reason_success; break; } if (try_wait) { sync_.acquire(c.threadx_); reason = sema_wakeup_reason_failed; break; } unpark_reason wr = ws_.park_current(c, is_timed, false, true, info); initial_state = state_; if (unpark_reason_timeout == wr) { sync_.acquire(c.threadx_); reason = sema_wakeup_reason_timeout; break; } else if (unpark_reason_normal == wr) { RL_VERIFY(state_ == true); if (manual_reset_) { sync_.acquire(c.threadx_); } else { state_ = false; sync_.acq_rel(c.threadx_); } c.switch_back(info); reason = sema_wakeup_reason_success; break; } RL_VERIFY(false); } RL_HIST(wait_event) {this, try_wait, is_timed, initial_state, state_, reason} RL_HIST_END(); return reason; } virtual bool is_signaled(debug_info_param info) { (void)info; return state_; } virtual void memory_acquire(debug_info_param info) { (void)info; sync_.acquire(ctx().threadx_); } virtual void* prepare_wait(debug_info_param info) { (void)info; return &ws_; } RL_NOCOPY(event_data_impl); }; class generic_event : public win_waitable_object { public: generic_event() : impl_() { } generic_event(generic_event const&) : impl_() { } generic_event& operator = (generic_event const&) { return *this; } void init(bool manual_reset, bool initial_state, debug_info_param info) { context& c = ctx(); RL_ASSERT_IMPL(0 == impl_, test_result_double_initialization_of_event, "", info); sign_.check(info); impl_ = c.event_ctor(manual_reset, initial_state); } void deinit(debug_info_param info) { context& c = ctx(); check(info); c.event_dtor(impl_); impl_ = 0; } void set(debug_info_param info) { check(info); impl_->set(info); } void reset(debug_info_param info) { check(info); impl_->reset(info); } void pulse(debug_info_param info) { check(info); impl_->pulse(info); } virtual sema_wakeup_reason wait(bool try_wait, bool is_timed, debug_info_param info) { check(info); return impl_->wait(try_wait, is_timed, info); } virtual bool signal(debug_info_param info) { set(info); return true; } private: event_data* impl_; signature<0x3390eeaa> sign_; event_data* check(debug_info_param info) { RL_ASSERT_IMPL(impl_, test_result_usage_of_non_initialized_event, "", info); sign_.check(info); return impl_; } virtual bool is_signaled(debug_info_param info) { return check(info)->is_signaled(info); } virtual void memory_acquire(debug_info_param info) { check(info)->memory_acquire(info); } virtual void* prepare_wait(debug_info_param info) { return check(info)->prepare_wait(info); } }; } #endif |