| 1 | /* $Id: poll.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - Polling I/O Handles, Windows+Posix Implementation.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2010-2023 Oracle and/or its affiliates.
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox base platform packages, as
|
|---|
| 10 | * available from https://www.virtualbox.org.
|
|---|
| 11 | *
|
|---|
| 12 | * This program is free software; you can redistribute it and/or
|
|---|
| 13 | * modify it under the terms of the GNU General Public License
|
|---|
| 14 | * as published by the Free Software Foundation, in version 3 of the
|
|---|
| 15 | * License.
|
|---|
| 16 | *
|
|---|
| 17 | * This program is distributed in the hope that it will be useful, but
|
|---|
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 20 | * General Public License for more details.
|
|---|
| 21 | *
|
|---|
| 22 | * You should have received a copy of the GNU General Public License
|
|---|
| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
|
|---|
| 24 | *
|
|---|
| 25 | * The contents of this file may alternatively be used under the terms
|
|---|
| 26 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
|
|---|
| 28 | * in the VirtualBox distribution, in which case the provisions of the
|
|---|
| 29 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 30 | *
|
|---|
| 31 | * You may elect to license modified versions of this file under the
|
|---|
| 32 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 33 | *
|
|---|
| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
|
|---|
| 35 | */
|
|---|
| 36 |
|
|---|
| 37 |
|
|---|
| 38 | /*********************************************************************************************************************************
|
|---|
| 39 | * Header Files *
|
|---|
| 40 | *********************************************************************************************************************************/
|
|---|
| 41 | #include <iprt/cdefs.h>
|
|---|
| 42 | #ifdef RT_OS_WINDOWS
|
|---|
| 43 | # include <iprt/win/windows.h>
|
|---|
| 44 |
|
|---|
| 45 | #elif defined(RT_OS_OS2)
|
|---|
| 46 | # define INCL_BASE
|
|---|
| 47 | # include <os2.h>
|
|---|
| 48 | # include <limits.h>
|
|---|
| 49 | # include <sys/socket.h>
|
|---|
| 50 |
|
|---|
| 51 | #else
|
|---|
| 52 | # include <limits.h>
|
|---|
| 53 | # include <errno.h>
|
|---|
| 54 | # include <sys/poll.h>
|
|---|
| 55 | # if defined(RT_OS_SOLARIS)
|
|---|
| 56 | # include <sys/socket.h>
|
|---|
| 57 | # endif
|
|---|
| 58 | #endif
|
|---|
| 59 |
|
|---|
| 60 | #include <iprt/poll.h>
|
|---|
| 61 | #include "internal/iprt.h"
|
|---|
| 62 |
|
|---|
| 63 | #include <iprt/alloca.h>
|
|---|
| 64 | #include <iprt/asm.h>
|
|---|
| 65 | #include <iprt/assert.h>
|
|---|
| 66 | #include <iprt/err.h>
|
|---|
| 67 | #include <iprt/mem.h>
|
|---|
| 68 | #include <iprt/pipe.h>
|
|---|
| 69 | #include <iprt/socket.h>
|
|---|
| 70 | #include <iprt/string.h>
|
|---|
| 71 | #include <iprt/thread.h>
|
|---|
| 72 | #include <iprt/time.h>
|
|---|
| 73 |
|
|---|
| 74 | #include "internal/pipe.h"
|
|---|
| 75 | #define IPRT_INTERNAL_SOCKET_POLLING_ONLY
|
|---|
| 76 | #include "internal/socket.h"
|
|---|
| 77 | #include "internal/magics.h"
|
|---|
| 78 |
|
|---|
| 79 |
|
|---|
| 80 | /*********************************************************************************************************************************
|
|---|
| 81 | * Defined Constants And Macros *
|
|---|
| 82 | *********************************************************************************************************************************/
|
|---|
| 83 | /** The maximum poll set size.
|
|---|
| 84 | * @remarks To help portability, we set this to the Windows limit. We can lift
|
|---|
| 85 | * this restriction later if it becomes necessary. */
|
|---|
| 86 | #define RTPOLL_SET_MAX 64
|
|---|
| 87 |
|
|---|
| 88 |
|
|---|
| 89 |
|
|---|
| 90 | /*********************************************************************************************************************************
|
|---|
| 91 | * Structures and Typedefs *
|
|---|
| 92 | *********************************************************************************************************************************/
|
|---|
| 93 | /**
|
|---|
| 94 | * Handle entry in a poll set.
|
|---|
| 95 | */
|
|---|
| 96 | typedef struct RTPOLLSETHNDENT
|
|---|
| 97 | {
|
|---|
| 98 | /** The handle type. */
|
|---|
| 99 | RTHANDLETYPE enmType;
|
|---|
| 100 | /** The handle ID. */
|
|---|
| 101 | uint32_t id;
|
|---|
| 102 | /** The events we're waiting for here. */
|
|---|
| 103 | uint32_t fEvents;
|
|---|
| 104 | /** Set if this is the final entry for this handle.
|
|---|
| 105 | * If the handle is entered more than once, this will be clear for all but
|
|---|
| 106 | * the last entry. */
|
|---|
| 107 | bool fFinalEntry;
|
|---|
| 108 | /** The handle union. */
|
|---|
| 109 | RTHANDLEUNION u;
|
|---|
| 110 | } RTPOLLSETHNDENT;
|
|---|
| 111 | /** Pointer to a handle entry. */
|
|---|
| 112 | typedef RTPOLLSETHNDENT *PRTPOLLSETHNDENT;
|
|---|
| 113 |
|
|---|
| 114 |
|
|---|
| 115 | /**
|
|---|
| 116 | * Poll set data.
|
|---|
| 117 | */
|
|---|
| 118 | typedef struct RTPOLLSETINTERNAL
|
|---|
| 119 | {
|
|---|
| 120 | /** The magic value (RTPOLLSET_MAGIC). */
|
|---|
| 121 | uint32_t u32Magic;
|
|---|
| 122 | /** Set when someone is polling or making changes. */
|
|---|
| 123 | bool volatile fBusy;
|
|---|
| 124 |
|
|---|
| 125 | /** The number of allocated handles. */
|
|---|
| 126 | uint16_t cHandlesAllocated;
|
|---|
| 127 | /** The number of valid handles in the set. */
|
|---|
| 128 | uint16_t cHandles;
|
|---|
| 129 |
|
|---|
| 130 | #ifdef RT_OS_WINDOWS
|
|---|
| 131 | /** Pointer to an array of native handles. */
|
|---|
| 132 | HANDLE *pahNative;
|
|---|
| 133 | #elif defined(RT_OS_OS2)
|
|---|
| 134 | /** The semaphore records. */
|
|---|
| 135 | PSEMRECORD paSemRecs;
|
|---|
| 136 | /** The multiple wait semaphore used for non-socket waits. */
|
|---|
| 137 | HMUX hmux;
|
|---|
| 138 | /** os2_select template. */
|
|---|
| 139 | int *pafdSelect;
|
|---|
| 140 | /** The number of sockets to monitor for read. */
|
|---|
| 141 | uint16_t cReadSockets;
|
|---|
| 142 | /** The number of sockets to monitor for write. */
|
|---|
| 143 | uint16_t cWriteSockets;
|
|---|
| 144 | /** The number of sockets to monitor for exceptions. */
|
|---|
| 145 | uint16_t cXcptSockets;
|
|---|
| 146 | /** The number of pipes. */
|
|---|
| 147 | uint16_t cPipes;
|
|---|
| 148 | /** Pointer to an array of native handles. */
|
|---|
| 149 | PRTHCINTPTR pahNative;
|
|---|
| 150 | #else
|
|---|
| 151 | /** Pointer to an array of pollfd structures. */
|
|---|
| 152 | struct pollfd *paPollFds;
|
|---|
| 153 | #endif
|
|---|
| 154 | /** Pointer to an array of handles and IDs. */
|
|---|
| 155 | PRTPOLLSETHNDENT paHandles;
|
|---|
| 156 | } RTPOLLSETINTERNAL;
|
|---|
| 157 |
|
|---|
| 158 |
|
|---|
| 159 |
|
|---|
| 160 | /**
|
|---|
| 161 | * Common worker for RTPoll and RTPollNoResume
|
|---|
| 162 | */
|
|---|
| 163 | static int rtPollNoResumeWorker(RTPOLLSETINTERNAL *pThis, uint64_t MsStart, RTMSINTERVAL cMillies,
|
|---|
| 164 | uint32_t *pfEvents, uint32_t *pid)
|
|---|
| 165 | {
|
|---|
| 166 | int rc;
|
|---|
| 167 |
|
|---|
| 168 | /*
|
|---|
| 169 | * Check for special case, RTThreadSleep...
|
|---|
| 170 | */
|
|---|
| 171 | uint32_t const cHandles = pThis->cHandles;
|
|---|
| 172 | if (cHandles == 0)
|
|---|
| 173 | {
|
|---|
| 174 | if (RT_LIKELY(cMillies != RT_INDEFINITE_WAIT))
|
|---|
| 175 | {
|
|---|
| 176 | rc = RTThreadSleep(cMillies);
|
|---|
| 177 | if (RT_SUCCESS(rc))
|
|---|
| 178 | rc = VERR_TIMEOUT;
|
|---|
| 179 | }
|
|---|
| 180 | else
|
|---|
| 181 | rc = VERR_DEADLOCK;
|
|---|
| 182 | return rc;
|
|---|
| 183 | }
|
|---|
| 184 |
|
|---|
| 185 | #if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
|
|---|
| 186 | /*
|
|---|
| 187 | * Check + prepare the handles before waiting.
|
|---|
| 188 | */
|
|---|
| 189 | uint32_t fEvents = 0;
|
|---|
| 190 | bool const fNoWait = cMillies == 0;
|
|---|
| 191 | uint32_t i;
|
|---|
| 192 | for (i = 0; i < cHandles; i++)
|
|---|
| 193 | {
|
|---|
| 194 | switch (pThis->paHandles[i].enmType)
|
|---|
| 195 | {
|
|---|
| 196 | case RTHANDLETYPE_PIPE:
|
|---|
| 197 | fEvents = rtPipePollStart(pThis->paHandles[i].u.hPipe, pThis, pThis->paHandles[i].fEvents,
|
|---|
| 198 | pThis->paHandles[i].fFinalEntry, fNoWait);
|
|---|
| 199 | break;
|
|---|
| 200 |
|
|---|
| 201 | case RTHANDLETYPE_SOCKET:
|
|---|
| 202 | fEvents = rtSocketPollStart(pThis->paHandles[i].u.hSocket, pThis, pThis->paHandles[i].fEvents,
|
|---|
| 203 | pThis->paHandles[i].fFinalEntry, fNoWait);
|
|---|
| 204 | break;
|
|---|
| 205 |
|
|---|
| 206 | default:
|
|---|
| 207 | AssertFailed();
|
|---|
| 208 | fEvents = UINT32_MAX;
|
|---|
| 209 | break;
|
|---|
| 210 | }
|
|---|
| 211 | if (fEvents)
|
|---|
| 212 | break;
|
|---|
| 213 | }
|
|---|
| 214 | if ( fEvents
|
|---|
| 215 | || fNoWait)
|
|---|
| 216 | {
|
|---|
| 217 |
|
|---|
| 218 | if (pid)
|
|---|
| 219 | *pid = pThis->paHandles[i].id;
|
|---|
| 220 | if (pfEvents)
|
|---|
| 221 | *pfEvents = fEvents;
|
|---|
| 222 | rc = !fEvents
|
|---|
| 223 | ? VERR_TIMEOUT
|
|---|
| 224 | : fEvents != UINT32_MAX
|
|---|
| 225 | ? VINF_SUCCESS
|
|---|
| 226 | : VERR_INTERNAL_ERROR_4;
|
|---|
| 227 |
|
|---|
| 228 | /* clean up */
|
|---|
| 229 | if (!fNoWait)
|
|---|
| 230 | while (i-- > 0)
|
|---|
| 231 | {
|
|---|
| 232 | switch (pThis->paHandles[i].enmType)
|
|---|
| 233 | {
|
|---|
| 234 | case RTHANDLETYPE_PIPE:
|
|---|
| 235 | rtPipePollDone(pThis->paHandles[i].u.hPipe, pThis->paHandles[i].fEvents,
|
|---|
| 236 | pThis->paHandles[i].fFinalEntry, false);
|
|---|
| 237 | break;
|
|---|
| 238 |
|
|---|
| 239 | case RTHANDLETYPE_SOCKET:
|
|---|
| 240 | rtSocketPollDone(pThis->paHandles[i].u.hSocket, pThis->paHandles[i].fEvents,
|
|---|
| 241 | pThis->paHandles[i].fFinalEntry, false);
|
|---|
| 242 | break;
|
|---|
| 243 |
|
|---|
| 244 | default:
|
|---|
| 245 | AssertFailed();
|
|---|
| 246 | break;
|
|---|
| 247 | }
|
|---|
| 248 | }
|
|---|
| 249 |
|
|---|
| 250 | return rc;
|
|---|
| 251 | }
|
|---|
| 252 |
|
|---|
| 253 |
|
|---|
| 254 | /*
|
|---|
| 255 | * Wait.
|
|---|
| 256 | */
|
|---|
| 257 | # ifdef RT_OS_WINDOWS
|
|---|
| 258 | RT_NOREF_PV(MsStart);
|
|---|
| 259 |
|
|---|
| 260 | DWORD dwRc = WaitForMultipleObjectsEx(cHandles, pThis->pahNative,
|
|---|
| 261 | FALSE /*fWaitAll */,
|
|---|
| 262 | cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies,
|
|---|
| 263 | TRUE /*fAlertable*/);
|
|---|
| 264 | AssertCompile(WAIT_OBJECT_0 == 0);
|
|---|
| 265 | if (dwRc < WAIT_OBJECT_0 + cHandles)
|
|---|
| 266 | rc = VERR_INTERRUPTED;
|
|---|
| 267 | else if (dwRc == WAIT_TIMEOUT)
|
|---|
| 268 | rc = VERR_TIMEOUT;
|
|---|
| 269 | else if (dwRc == WAIT_IO_COMPLETION)
|
|---|
| 270 | rc = VERR_INTERRUPTED;
|
|---|
| 271 | else if (dwRc == WAIT_FAILED)
|
|---|
| 272 | rc = RTErrConvertFromWin32(GetLastError());
|
|---|
| 273 | else
|
|---|
| 274 | {
|
|---|
| 275 | AssertMsgFailed(("%u (%#x)\n", dwRc, dwRc));
|
|---|
| 276 | rc = VERR_INTERNAL_ERROR_5;
|
|---|
| 277 | }
|
|---|
| 278 |
|
|---|
| 279 | # else /* RT_OS_OS2 */
|
|---|
| 280 | APIRET orc;
|
|---|
| 281 | ULONG ulUser = 0;
|
|---|
| 282 | uint16_t cSockets = pThis->cReadSockets + pThis->cWriteSockets + pThis->cXcptSockets;
|
|---|
| 283 | if (cSockets == 0)
|
|---|
| 284 | {
|
|---|
| 285 | /* Only pipes. */
|
|---|
| 286 | AssertReturn(pThis->cPipes > 0, VERR_INTERNAL_ERROR_2);
|
|---|
| 287 | orc = DosWaitMuxWaitSem(pThis->hmux,
|
|---|
| 288 | cMillies == RT_INDEFINITE_WAIT ? SEM_INDEFINITE_WAIT : RT_MIN(cMillies, SEM_INDEFINITE_WAIT - 1),
|
|---|
| 289 | &ulUser);
|
|---|
| 290 | rc = RTErrConvertFromOS2(orc);
|
|---|
| 291 | }
|
|---|
| 292 | else
|
|---|
| 293 | {
|
|---|
| 294 | int *pafdSelect = (int *)alloca(cSockets + 1);
|
|---|
| 295 | if (pThis->cPipes == 0)
|
|---|
| 296 | {
|
|---|
| 297 | /* Only sockets. */
|
|---|
| 298 | memcpy(pafdSelect, pThis->pafdSelect, sizeof(pThis->pafdSelect[0]) * (cSockets + 1));
|
|---|
| 299 | rc = os2_select(pafdSelect, pThis->cReadSockets, pThis->cWriteSockets, pThis->cXcptSockets,
|
|---|
| 300 | cMillies == RT_INDEFINITE_WAIT ? -1 : (long)RT_MIN(cMillies, LONG_MAX));
|
|---|
| 301 | if (rc > 0)
|
|---|
| 302 | rc = VINF_SUCCESS;
|
|---|
| 303 | else if (rc == 0)
|
|---|
| 304 | rc = VERR_TIMEOUT;
|
|---|
| 305 | else
|
|---|
| 306 | rc = RTErrConvertFromErrno(sock_errno());
|
|---|
| 307 | }
|
|---|
| 308 | else
|
|---|
| 309 | {
|
|---|
| 310 | /* Mix of both - taking the easy way out, not optimal, but whatever... */
|
|---|
| 311 | do
|
|---|
| 312 | {
|
|---|
| 313 | orc = DosWaitMuxWaitSem(pThis->hmux, 8, &ulUser);
|
|---|
| 314 | if (orc != ERROR_TIMEOUT && orc != ERROR_SEM_TIMEOUT)
|
|---|
| 315 | {
|
|---|
| 316 | rc = RTErrConvertFromOS2(orc);
|
|---|
| 317 | break;
|
|---|
| 318 | }
|
|---|
| 319 |
|
|---|
| 320 | memcpy(pafdSelect, pThis->pafdSelect, sizeof(pThis->pafdSelect[0]) * (cSockets + 1));
|
|---|
| 321 | rc = os2_select(pafdSelect, pThis->cReadSockets, pThis->cWriteSockets, pThis->cXcptSockets, 8);
|
|---|
| 322 | if (rc != 0)
|
|---|
| 323 | {
|
|---|
| 324 | if (rc > 0)
|
|---|
| 325 | rc = VINF_SUCCESS;
|
|---|
| 326 | else
|
|---|
| 327 | rc = RTErrConvertFromErrno(sock_errno());
|
|---|
| 328 | break;
|
|---|
| 329 | }
|
|---|
| 330 | } while (cMillies == RT_INDEFINITE_WAIT || RTTimeMilliTS() - MsStart < cMillies);
|
|---|
| 331 | }
|
|---|
| 332 | }
|
|---|
| 333 | # endif /* RT_OS_OS2 */
|
|---|
| 334 |
|
|---|
| 335 | /*
|
|---|
| 336 | * Get event (if pending) and do wait cleanup.
|
|---|
| 337 | */
|
|---|
| 338 | bool fHarvestEvents = true;
|
|---|
| 339 | for (i = 0; i < cHandles; i++)
|
|---|
| 340 | {
|
|---|
| 341 | fEvents = 0;
|
|---|
| 342 | switch (pThis->paHandles[i].enmType)
|
|---|
| 343 | {
|
|---|
| 344 | case RTHANDLETYPE_PIPE:
|
|---|
| 345 | fEvents = rtPipePollDone(pThis->paHandles[i].u.hPipe, pThis->paHandles[i].fEvents,
|
|---|
| 346 | pThis->paHandles[i].fFinalEntry, fHarvestEvents);
|
|---|
| 347 | break;
|
|---|
| 348 |
|
|---|
| 349 | case RTHANDLETYPE_SOCKET:
|
|---|
| 350 | fEvents = rtSocketPollDone(pThis->paHandles[i].u.hSocket, pThis->paHandles[i].fEvents,
|
|---|
| 351 | pThis->paHandles[i].fFinalEntry, fHarvestEvents);
|
|---|
| 352 | break;
|
|---|
| 353 |
|
|---|
| 354 | default:
|
|---|
| 355 | AssertFailed();
|
|---|
| 356 | break;
|
|---|
| 357 | }
|
|---|
| 358 | if ( fEvents
|
|---|
| 359 | && fHarvestEvents)
|
|---|
| 360 | {
|
|---|
| 361 | Assert(fEvents != UINT32_MAX);
|
|---|
| 362 | fHarvestEvents = false;
|
|---|
| 363 | if (pfEvents)
|
|---|
| 364 | *pfEvents = fEvents;
|
|---|
| 365 | if (pid)
|
|---|
| 366 | *pid = pThis->paHandles[i].id;
|
|---|
| 367 | rc = VINF_SUCCESS;
|
|---|
| 368 | }
|
|---|
| 369 | }
|
|---|
| 370 |
|
|---|
| 371 | #else /* POSIX */
|
|---|
| 372 |
|
|---|
| 373 | RT_NOREF_PV(MsStart);
|
|---|
| 374 |
|
|---|
| 375 | /* clear the revents. */
|
|---|
| 376 | uint32_t i = pThis->cHandles;
|
|---|
| 377 | while (i-- > 0)
|
|---|
| 378 | pThis->paPollFds[i].revents = 0;
|
|---|
| 379 |
|
|---|
| 380 | rc = poll(&pThis->paPollFds[0], pThis->cHandles,
|
|---|
| 381 | cMillies == RT_INDEFINITE_WAIT || cMillies >= INT_MAX
|
|---|
| 382 | ? -1
|
|---|
| 383 | : (int)cMillies);
|
|---|
| 384 | if (rc == 0)
|
|---|
| 385 | return VERR_TIMEOUT;
|
|---|
| 386 | if (rc < 0)
|
|---|
| 387 | return RTErrConvertFromErrno(errno);
|
|---|
| 388 | for (i = 0; i < pThis->cHandles; i++)
|
|---|
| 389 | if (pThis->paPollFds[i].revents)
|
|---|
| 390 | {
|
|---|
| 391 | if (pfEvents)
|
|---|
| 392 | {
|
|---|
| 393 | *pfEvents = 0;
|
|---|
| 394 | if (pThis->paPollFds[i].revents & (POLLIN
|
|---|
| 395 | # ifdef POLLRDNORM
|
|---|
| 396 | | POLLRDNORM /* just in case */
|
|---|
| 397 | # endif
|
|---|
| 398 | # ifdef POLLRDBAND
|
|---|
| 399 | | POLLRDBAND /* ditto */
|
|---|
| 400 | # endif
|
|---|
| 401 | # ifdef POLLPRI
|
|---|
| 402 | | POLLPRI /* ditto */
|
|---|
| 403 | # endif
|
|---|
| 404 | # ifdef POLLMSG
|
|---|
| 405 | | POLLMSG /* ditto */
|
|---|
| 406 | # endif
|
|---|
| 407 | # ifdef POLLWRITE
|
|---|
| 408 | | POLLWRITE /* ditto */
|
|---|
| 409 | # endif
|
|---|
| 410 | # ifdef POLLEXTEND
|
|---|
| 411 | | POLLEXTEND /* ditto */
|
|---|
| 412 | # endif
|
|---|
| 413 | )
|
|---|
| 414 | )
|
|---|
| 415 | *pfEvents |= RTPOLL_EVT_READ;
|
|---|
| 416 |
|
|---|
| 417 | if (pThis->paPollFds[i].revents & (POLLOUT
|
|---|
| 418 | # ifdef POLLWRNORM
|
|---|
| 419 | | POLLWRNORM /* just in case */
|
|---|
| 420 | # endif
|
|---|
| 421 | # ifdef POLLWRBAND
|
|---|
| 422 | | POLLWRBAND /* ditto */
|
|---|
| 423 | # endif
|
|---|
| 424 | )
|
|---|
| 425 | )
|
|---|
| 426 | *pfEvents |= RTPOLL_EVT_WRITE;
|
|---|
| 427 |
|
|---|
| 428 | if (pThis->paPollFds[i].revents & (POLLERR | POLLHUP | POLLNVAL
|
|---|
| 429 | # ifdef POLLRDHUP
|
|---|
| 430 | | POLLRDHUP
|
|---|
| 431 | # endif
|
|---|
| 432 | )
|
|---|
| 433 | )
|
|---|
| 434 | *pfEvents |= RTPOLL_EVT_ERROR;
|
|---|
| 435 |
|
|---|
| 436 | # if defined(RT_OS_SOLARIS)
|
|---|
| 437 | /* Solaris does not return POLLHUP for sockets, just POLLIN. Check if a
|
|---|
| 438 | POLLIN should also have RTPOLL_EVT_ERROR set or not, so we present a
|
|---|
| 439 | behaviour more in line with linux and BSDs. Note that this will not
|
|---|
| 440 | help is only RTPOLL_EVT_ERROR was requested, that will require
|
|---|
| 441 | extending this hack quite a bit further (restart poll): */
|
|---|
| 442 | if ( *pfEvents == RTPOLL_EVT_READ
|
|---|
| 443 | && pThis->paHandles[i].enmType == RTHANDLETYPE_SOCKET)
|
|---|
| 444 | {
|
|---|
| 445 | uint8_t abBuf[64];
|
|---|
| 446 | ssize_t rcRecv = recv(pThis->paPollFds[i].fd, abBuf, sizeof(abBuf), MSG_PEEK | MSG_DONTWAIT);
|
|---|
| 447 | if (rcRecv == 0)
|
|---|
| 448 | *pfEvents |= RTPOLL_EVT_ERROR;
|
|---|
| 449 | }
|
|---|
| 450 | # endif
|
|---|
| 451 | }
|
|---|
| 452 | if (pid)
|
|---|
| 453 | *pid = pThis->paHandles[i].id;
|
|---|
| 454 | return VINF_SUCCESS;
|
|---|
| 455 | }
|
|---|
| 456 |
|
|---|
| 457 | AssertFailed();
|
|---|
| 458 | RTThreadYield();
|
|---|
| 459 | rc = VERR_INTERRUPTED;
|
|---|
| 460 |
|
|---|
| 461 | #endif /* POSIX */
|
|---|
| 462 |
|
|---|
| 463 | return rc;
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 |
|
|---|
| 467 | RTDECL(int) RTPoll(RTPOLLSET hPollSet, RTMSINTERVAL cMillies, uint32_t *pfEvents, uint32_t *pid)
|
|---|
| 468 | {
|
|---|
| 469 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 470 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
|
|---|
| 471 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
|
|---|
| 472 | AssertPtrNull(pfEvents);
|
|---|
| 473 | AssertPtrNull(pid);
|
|---|
| 474 |
|
|---|
| 475 | /*
|
|---|
| 476 | * Set the busy flag and do the job.
|
|---|
| 477 | */
|
|---|
| 478 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), VERR_CONCURRENT_ACCESS);
|
|---|
| 479 |
|
|---|
| 480 | int rc;
|
|---|
| 481 | if (cMillies == RT_INDEFINITE_WAIT || cMillies == 0)
|
|---|
| 482 | {
|
|---|
| 483 | do rc = rtPollNoResumeWorker(pThis, 0, cMillies, pfEvents, pid);
|
|---|
| 484 | while (rc == VERR_INTERRUPTED);
|
|---|
| 485 | }
|
|---|
| 486 | else
|
|---|
| 487 | {
|
|---|
| 488 | uint64_t MsStart = RTTimeMilliTS();
|
|---|
| 489 | rc = rtPollNoResumeWorker(pThis, MsStart, cMillies, pfEvents, pid);
|
|---|
| 490 | while (RT_UNLIKELY(rc == VERR_INTERRUPTED))
|
|---|
| 491 | {
|
|---|
| 492 | if (RTTimeMilliTS() - MsStart >= cMillies)
|
|---|
| 493 | {
|
|---|
| 494 | rc = VERR_TIMEOUT;
|
|---|
| 495 | break;
|
|---|
| 496 | }
|
|---|
| 497 | rc = rtPollNoResumeWorker(pThis, MsStart, cMillies, pfEvents, pid);
|
|---|
| 498 | }
|
|---|
| 499 | }
|
|---|
| 500 |
|
|---|
| 501 | ASMAtomicWriteBool(&pThis->fBusy, false);
|
|---|
| 502 |
|
|---|
| 503 | return rc;
|
|---|
| 504 | }
|
|---|
| 505 |
|
|---|
| 506 |
|
|---|
| 507 | RTDECL(int) RTPollNoResume(RTPOLLSET hPollSet, RTMSINTERVAL cMillies, uint32_t *pfEvents, uint32_t *pid)
|
|---|
| 508 | {
|
|---|
| 509 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 510 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
|
|---|
| 511 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
|
|---|
| 512 | AssertPtrNull(pfEvents);
|
|---|
| 513 | AssertPtrNull(pid);
|
|---|
| 514 |
|
|---|
| 515 | /*
|
|---|
| 516 | * Set the busy flag and do the job.
|
|---|
| 517 | */
|
|---|
| 518 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), VERR_CONCURRENT_ACCESS);
|
|---|
| 519 |
|
|---|
| 520 | int rc;
|
|---|
| 521 | if (cMillies == RT_INDEFINITE_WAIT || cMillies == 0)
|
|---|
| 522 | rc = rtPollNoResumeWorker(pThis, 0, cMillies, pfEvents, pid);
|
|---|
| 523 | else
|
|---|
| 524 | rc = rtPollNoResumeWorker(pThis, RTTimeMilliTS(), cMillies, pfEvents, pid);
|
|---|
| 525 |
|
|---|
| 526 | ASMAtomicWriteBool(&pThis->fBusy, false);
|
|---|
| 527 |
|
|---|
| 528 | return rc;
|
|---|
| 529 | }
|
|---|
| 530 |
|
|---|
| 531 |
|
|---|
| 532 | RTDECL(int) RTPollSetCreate(PRTPOLLSET phPollSet)
|
|---|
| 533 | {
|
|---|
| 534 | AssertPtrReturn(phPollSet, VERR_INVALID_POINTER);
|
|---|
| 535 | RTPOLLSETINTERNAL *pThis = (RTPOLLSETINTERNAL *)RTMemAlloc(sizeof(RTPOLLSETINTERNAL));
|
|---|
| 536 | if (!pThis)
|
|---|
| 537 | return VERR_NO_MEMORY;
|
|---|
| 538 |
|
|---|
| 539 | pThis->fBusy = false;
|
|---|
| 540 | pThis->cHandles = 0;
|
|---|
| 541 | pThis->cHandlesAllocated = 0;
|
|---|
| 542 | #ifdef RT_OS_WINDOWS
|
|---|
| 543 | pThis->pahNative = NULL;
|
|---|
| 544 | #elif defined(RT_OS_OS2)
|
|---|
| 545 | pThis->hmux = NULLHANDLE;
|
|---|
| 546 | APIRET orc = DosCreateMuxWaitSem(NULL, &pThis->hmux, 0, NULL, DCMW_WAIT_ANY);
|
|---|
| 547 | if (orc != NO_ERROR)
|
|---|
| 548 | {
|
|---|
| 549 | RTMemFree(pThis);
|
|---|
| 550 | return RTErrConvertFromOS2(orc);
|
|---|
| 551 | }
|
|---|
| 552 | pThis->pafdSelect = NULL;
|
|---|
| 553 | pThis->cReadSockets = 0;
|
|---|
| 554 | pThis->cWriteSockets = 0;
|
|---|
| 555 | pThis->cXcptSockets = 0;
|
|---|
| 556 | pThis->cPipes = 0;
|
|---|
| 557 | pThis->pahNative = NULL;
|
|---|
| 558 | #else
|
|---|
| 559 | pThis->paPollFds = NULL;
|
|---|
| 560 | #endif
|
|---|
| 561 | pThis->paHandles = NULL;
|
|---|
| 562 | pThis->u32Magic = RTPOLLSET_MAGIC;
|
|---|
| 563 |
|
|---|
| 564 | *phPollSet = pThis;
|
|---|
| 565 | return VINF_SUCCESS;
|
|---|
| 566 | }
|
|---|
| 567 |
|
|---|
| 568 |
|
|---|
| 569 | RTDECL(int) RTPollSetDestroy(RTPOLLSET hPollSet)
|
|---|
| 570 | {
|
|---|
| 571 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 572 | if (pThis == NIL_RTPOLLSET)
|
|---|
| 573 | return VINF_SUCCESS;
|
|---|
| 574 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
|
|---|
| 575 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
|
|---|
| 576 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), VERR_CONCURRENT_ACCESS);
|
|---|
| 577 |
|
|---|
| 578 | ASMAtomicWriteU32(&pThis->u32Magic, ~RTPOLLSET_MAGIC);
|
|---|
| 579 | #ifdef RT_OS_WINDOWS
|
|---|
| 580 | RTMemFree(pThis->pahNative);
|
|---|
| 581 | pThis->pahNative = NULL;
|
|---|
| 582 | #elif defined(RT_OS_OS2)
|
|---|
| 583 | DosCloseMuxWaitSem(pThis->hmux);
|
|---|
| 584 | pThis->hmux = NULLHANDLE;
|
|---|
| 585 | RTMemFree(pThis->pafdSelect);
|
|---|
| 586 | pThis->pafdSelect = NULL;
|
|---|
| 587 | RTMemFree(pThis->pahNative);
|
|---|
| 588 | pThis->pahNative = NULL;
|
|---|
| 589 | #else
|
|---|
| 590 | RTMemFree(pThis->paPollFds);
|
|---|
| 591 | pThis->paPollFds = NULL;
|
|---|
| 592 | #endif
|
|---|
| 593 | RTMemFree(pThis->paHandles);
|
|---|
| 594 | pThis->paHandles = NULL;
|
|---|
| 595 | RTMemFree(pThis);
|
|---|
| 596 |
|
|---|
| 597 | return VINF_SUCCESS;
|
|---|
| 598 | }
|
|---|
| 599 |
|
|---|
| 600 | #ifdef RT_OS_OS2
|
|---|
| 601 |
|
|---|
| 602 | /**
|
|---|
| 603 | * Checks if @a fd is in the specific socket subset.
|
|---|
| 604 | *
|
|---|
| 605 | * @returns true / false.
|
|---|
| 606 | * @param pThis The poll set instance.
|
|---|
| 607 | * @param iStart The index to start at.
|
|---|
| 608 | * @param cFds The number of sockets to check.
|
|---|
| 609 | * @param fd The socket to look for.
|
|---|
| 610 | */
|
|---|
| 611 | static bool rtPollSetOs2IsSocketInSet(RTPOLLSETINTERNAL *pThis, uint16_t iStart, uint16_t cFds, int fd)
|
|---|
| 612 | {
|
|---|
| 613 | int const *pfd = pThis->pafdSelect + iStart;
|
|---|
| 614 | while (cFds-- > 0)
|
|---|
| 615 | {
|
|---|
| 616 | if (*pfd == fd)
|
|---|
| 617 | return true;
|
|---|
| 618 | pfd++;
|
|---|
| 619 | }
|
|---|
| 620 | return false;
|
|---|
| 621 | }
|
|---|
| 622 |
|
|---|
| 623 |
|
|---|
| 624 | /**
|
|---|
| 625 | * Removes a socket from a select template subset.
|
|---|
| 626 | *
|
|---|
| 627 | * @param pThis The poll set instance.
|
|---|
| 628 | * @param iStart The index to start at.
|
|---|
| 629 | * @param pcSubSet The subset counter to decrement.
|
|---|
| 630 | * @param fd The socket to remove.
|
|---|
| 631 | */
|
|---|
| 632 | static void rtPollSetOs2RemoveSocket(RTPOLLSETINTERNAL *pThis, uint16_t iStart, uint16_t *pcFds, int fd)
|
|---|
| 633 | {
|
|---|
| 634 | uint16_t cFds = *pcFds;
|
|---|
| 635 | while (cFds-- > 0)
|
|---|
| 636 | {
|
|---|
| 637 | if (pThis->pafdSelect[iStart] == fd)
|
|---|
| 638 | break;
|
|---|
| 639 | iStart++;
|
|---|
| 640 | }
|
|---|
| 641 | AssertReturnVoid(iStart != UINT16_MAX);
|
|---|
| 642 |
|
|---|
| 643 | /* Note! We keep a -1 entry at the end of the set, thus the + 1. */
|
|---|
| 644 | memmove(&pThis->pafdSelect[iStart],
|
|---|
| 645 | &pThis->pafdSelect[iStart + 1],
|
|---|
| 646 | pThis->cReadSockets + pThis->cWriteSockets + pThis->cXcptSockets + 1 - 1 - iStart);
|
|---|
| 647 | *pcFds -= 1;
|
|---|
| 648 |
|
|---|
| 649 | Assert(pThis->pafdSelect[pThis->cReadSockets + pThis->cWriteSockets + pThis->cXcptSockets] == -1);
|
|---|
| 650 | }
|
|---|
| 651 |
|
|---|
| 652 |
|
|---|
| 653 | /**
|
|---|
| 654 | * Adds a socket to a select template subset.
|
|---|
| 655 | *
|
|---|
| 656 | * @param pThis The poll set instance.
|
|---|
| 657 | * @param iInsert The insertion point.
|
|---|
| 658 | * ASSUMED to be at the end of the subset.
|
|---|
| 659 | * @param pcSubSet The subset counter to increment.
|
|---|
| 660 | * @param fd The socket to add.
|
|---|
| 661 | */
|
|---|
| 662 | static void rtPollSetOs2AddSocket(RTPOLLSETINTERNAL *pThis, uint16_t iInsert, uint16_t *pcFds, int fd)
|
|---|
| 663 | {
|
|---|
| 664 | Assert(!rtPollSetOs2IsSocketInSet(pThis, iInsert - *pcFds, *pcFds, fd));
|
|---|
| 665 |
|
|---|
| 666 | /* Note! We keep a -1 entry at the end of the set, thus the + 1. */
|
|---|
| 667 | memmove(&pThis->pafdSelect[iInsert + 1],
|
|---|
| 668 | &pThis->pafdSelect[iInsert],
|
|---|
| 669 | pThis->cReadSockets + pThis->cWriteSockets + pThis->cXcptSockets + 1 - iInsert);
|
|---|
| 670 | pThis->pafdSelect[iInsert] = fd;
|
|---|
| 671 | *pcFds += 1;
|
|---|
| 672 |
|
|---|
| 673 | Assert(pThis->pafdSelect[pThis->cReadSockets + pThis->cWriteSockets + pThis->cXcptSockets] == -1);
|
|---|
| 674 | }
|
|---|
| 675 |
|
|---|
| 676 |
|
|---|
| 677 | /**
|
|---|
| 678 | * OS/2 specific RTPollSetAdd worker.
|
|---|
| 679 | *
|
|---|
| 680 | * @returns IPRT status code.
|
|---|
| 681 | * @param pThis The poll set instance.
|
|---|
| 682 | * @param i The index of the new handle (not committed).
|
|---|
| 683 | * @param fEvents The events to poll for.
|
|---|
| 684 | */
|
|---|
| 685 | static int rtPollSetOs2Add(RTPOLLSETINTERNAL *pThis, unsigned i, uint32_t fEvents)
|
|---|
| 686 | {
|
|---|
| 687 | if (pThis->paHandles[i].enmType == RTHANDLETYPE_SOCKET)
|
|---|
| 688 | {
|
|---|
| 689 | int const fdSocket = pThis->pahNative[i];
|
|---|
| 690 | if ( (fEvents & RTPOLL_EVT_READ)
|
|---|
| 691 | && rtPollSetOs2IsSocketInSet(pThis, 0, pThis->cReadSockets, fdSocket))
|
|---|
| 692 | rtPollSetOs2AddSocket(pThis, pThis->cReadSockets, &pThis->cReadSockets, fdSocket);
|
|---|
| 693 |
|
|---|
| 694 | if ( (fEvents & RTPOLL_EVT_WRITE)
|
|---|
| 695 | && rtPollSetOs2IsSocketInSet(pThis, pThis->cReadSockets, pThis->cWriteSockets, fdSocket))
|
|---|
| 696 | rtPollSetOs2AddSocket(pThis, pThis->cReadSockets + pThis->cWriteSockets, &pThis->cWriteSockets, fdSocket);
|
|---|
| 697 |
|
|---|
| 698 | if ( (fEvents & RTPOLL_EVT_ERROR)
|
|---|
| 699 | && rtPollSetOs2IsSocketInSet(pThis, pThis->cReadSockets + pThis->cWriteSockets, pThis->cXcptSockets, fdSocket))
|
|---|
| 700 | rtPollSetOs2AddSocket(pThis, pThis->cReadSockets + pThis->cWriteSockets + pThis->cXcptSockets,
|
|---|
| 701 | &pThis->cXcptSockets, fdSocket);
|
|---|
| 702 | }
|
|---|
| 703 | else if (pThis->paHandles[i].enmType == RTHANDLETYPE_PIPE)
|
|---|
| 704 | {
|
|---|
| 705 | SEMRECORD Rec = { (HSEM)pThis->pahNative[i], pThis->paHandles[i].id };
|
|---|
| 706 | APIRET orc = DosAddMuxWaitSem(pThis->hmux, &Rec);
|
|---|
| 707 | if (orc != NO_ERROR && orc != ERROR_DUPLICATE_HANDLE)
|
|---|
| 708 | return RTErrConvertFromOS2(orc);
|
|---|
| 709 | pThis->cPipes++;
|
|---|
| 710 | }
|
|---|
| 711 | else
|
|---|
| 712 | AssertFailedReturn(VERR_INTERNAL_ERROR_2);
|
|---|
| 713 | return VINF_SUCCESS;
|
|---|
| 714 | }
|
|---|
| 715 |
|
|---|
| 716 | #endif /* RT_OS_OS2 */
|
|---|
| 717 |
|
|---|
| 718 | /**
|
|---|
| 719 | * Grows the poll set.
|
|---|
| 720 | *
|
|---|
| 721 | * @returns VINF_SUCCESS or VERR_NO_MEMORY.
|
|---|
| 722 | * @param pThis The poll set instance.
|
|---|
| 723 | * @param cHandlesNew The new poll set size.
|
|---|
| 724 | */
|
|---|
| 725 | static int rtPollSetGrow(RTPOLLSETINTERNAL *pThis, uint32_t cHandlesNew)
|
|---|
| 726 | {
|
|---|
| 727 | Assert(cHandlesNew > pThis->cHandlesAllocated);
|
|---|
| 728 |
|
|---|
| 729 | /* The common array. */
|
|---|
| 730 | void *pvNew = RTMemRealloc(pThis->paHandles, cHandlesNew * sizeof(pThis->paHandles[0]));
|
|---|
| 731 | if (!pvNew)
|
|---|
| 732 | return VERR_NO_MEMORY;
|
|---|
| 733 | pThis->paHandles = (PRTPOLLSETHNDENT)pvNew;
|
|---|
| 734 |
|
|---|
| 735 |
|
|---|
| 736 | /* OS specific handles */
|
|---|
| 737 | #if defined(RT_OS_WINDOWS)
|
|---|
| 738 | pvNew = RTMemRealloc(pThis->pahNative, cHandlesNew * sizeof(pThis->pahNative[0]));
|
|---|
| 739 | if (!pvNew)
|
|---|
| 740 | return VERR_NO_MEMORY;
|
|---|
| 741 | pThis->pahNative = (HANDLE *)pvNew;
|
|---|
| 742 |
|
|---|
| 743 | #elif defined(RT_OS_OS2)
|
|---|
| 744 | pvNew = RTMemRealloc(pThis->pahNative, cHandlesNew * sizeof(pThis->pahNative[0]));
|
|---|
| 745 | if (!pvNew)
|
|---|
| 746 | return VERR_NO_MEMORY;
|
|---|
| 747 | pThis->pahNative = (PRTHCINTPTR)pvNew;
|
|---|
| 748 |
|
|---|
| 749 | pvNew = RTMemRealloc(pThis->pafdSelect, (cHandlesNew * 3 + 1) * sizeof(pThis->pafdSelect[0]));
|
|---|
| 750 | if (!pvNew)
|
|---|
| 751 | return VERR_NO_MEMORY;
|
|---|
| 752 | pThis->pafdSelect = (int *)pvNew;
|
|---|
| 753 | if (pThis->cHandlesAllocated == 0)
|
|---|
| 754 | pThis->pafdSelect[0] = -1;
|
|---|
| 755 |
|
|---|
| 756 | #else
|
|---|
| 757 | pvNew = RTMemRealloc(pThis->paPollFds, cHandlesNew * sizeof(pThis->paPollFds[0]));
|
|---|
| 758 | if (!pvNew)
|
|---|
| 759 | return VERR_NO_MEMORY;
|
|---|
| 760 | pThis->paPollFds = (struct pollfd *)pvNew;
|
|---|
| 761 |
|
|---|
| 762 | #endif
|
|---|
| 763 |
|
|---|
| 764 | pThis->cHandlesAllocated = (uint16_t)cHandlesNew;
|
|---|
| 765 | return VINF_SUCCESS;
|
|---|
| 766 | }
|
|---|
| 767 |
|
|---|
| 768 |
|
|---|
| 769 | RTDECL(int) RTPollSetAdd(RTPOLLSET hPollSet, PCRTHANDLE pHandle, uint32_t fEvents, uint32_t id)
|
|---|
| 770 | {
|
|---|
| 771 | /*
|
|---|
| 772 | * Validate the input (tedious).
|
|---|
| 773 | */
|
|---|
| 774 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 775 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
|
|---|
| 776 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
|
|---|
| 777 | AssertReturn(!(fEvents & ~RTPOLL_EVT_VALID_MASK), VERR_INVALID_PARAMETER);
|
|---|
| 778 | AssertReturn(fEvents, VERR_INVALID_PARAMETER);
|
|---|
| 779 | AssertReturn(id != UINT32_MAX, VERR_INVALID_PARAMETER);
|
|---|
| 780 |
|
|---|
| 781 | if (!pHandle)
|
|---|
| 782 | return VINF_SUCCESS;
|
|---|
| 783 | AssertPtrReturn(pHandle, VERR_INVALID_POINTER);
|
|---|
| 784 | AssertReturn(pHandle->enmType > RTHANDLETYPE_INVALID && pHandle->enmType < RTHANDLETYPE_END, VERR_INVALID_PARAMETER);
|
|---|
| 785 |
|
|---|
| 786 | /*
|
|---|
| 787 | * Set the busy flag and do the job.
|
|---|
| 788 | */
|
|---|
| 789 |
|
|---|
| 790 | int rc = VINF_SUCCESS;
|
|---|
| 791 | RTHCINTPTR hNative = -1;
|
|---|
| 792 | RTHANDLEUNION uh;
|
|---|
| 793 | uh.uInt = 0;
|
|---|
| 794 | switch (pHandle->enmType)
|
|---|
| 795 | {
|
|---|
| 796 | case RTHANDLETYPE_PIPE:
|
|---|
| 797 | uh.hPipe = pHandle->u.hPipe;
|
|---|
| 798 | if (uh.hPipe == NIL_RTPIPE)
|
|---|
| 799 | return VINF_SUCCESS;
|
|---|
| 800 | rc = rtPipePollGetHandle(uh.hPipe, fEvents, &hNative);
|
|---|
| 801 | break;
|
|---|
| 802 |
|
|---|
| 803 | case RTHANDLETYPE_SOCKET:
|
|---|
| 804 | uh.hSocket = pHandle->u.hSocket;
|
|---|
| 805 | if (uh.hSocket == NIL_RTSOCKET)
|
|---|
| 806 | return VINF_SUCCESS;
|
|---|
| 807 | rc = rtSocketPollGetHandle(uh.hSocket, fEvents, &hNative);
|
|---|
| 808 | break;
|
|---|
| 809 |
|
|---|
| 810 | case RTHANDLETYPE_FILE:
|
|---|
| 811 | AssertMsgFailed(("Files are always ready for reading/writing and thus not pollable. Use native APIs for special devices.\n"));
|
|---|
| 812 | rc = VERR_POLL_HANDLE_NOT_POLLABLE;
|
|---|
| 813 | break;
|
|---|
| 814 |
|
|---|
| 815 | case RTHANDLETYPE_THREAD:
|
|---|
| 816 | AssertMsgFailed(("Thread handles are currently not pollable\n"));
|
|---|
| 817 | rc = VERR_POLL_HANDLE_NOT_POLLABLE;
|
|---|
| 818 | break;
|
|---|
| 819 |
|
|---|
| 820 | default:
|
|---|
| 821 | AssertMsgFailed(("\n"));
|
|---|
| 822 | rc = VERR_POLL_HANDLE_NOT_POLLABLE;
|
|---|
| 823 | break;
|
|---|
| 824 | }
|
|---|
| 825 | if (RT_SUCCESS(rc))
|
|---|
| 826 | {
|
|---|
| 827 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), VERR_CONCURRENT_ACCESS);
|
|---|
| 828 |
|
|---|
| 829 | uint32_t const i = pThis->cHandles;
|
|---|
| 830 |
|
|---|
| 831 | /* Check that the handle ID doesn't exist already. */
|
|---|
| 832 | uint32_t iPrev = UINT32_MAX;
|
|---|
| 833 | uint32_t j = i;
|
|---|
| 834 | while (j-- > 0)
|
|---|
| 835 | {
|
|---|
| 836 | if (pThis->paHandles[j].id == id)
|
|---|
| 837 | {
|
|---|
| 838 | rc = VERR_POLL_HANDLE_ID_EXISTS;
|
|---|
| 839 | break;
|
|---|
| 840 | }
|
|---|
| 841 | if ( pThis->paHandles[j].enmType == pHandle->enmType
|
|---|
| 842 | && pThis->paHandles[j].u.uInt == uh.uInt)
|
|---|
| 843 | iPrev = j;
|
|---|
| 844 | }
|
|---|
| 845 |
|
|---|
| 846 | /* Check that we won't overflow the poll set now. */
|
|---|
| 847 | if ( RT_SUCCESS(rc)
|
|---|
| 848 | && i + 1 > RTPOLL_SET_MAX)
|
|---|
| 849 | rc = VERR_POLL_SET_IS_FULL;
|
|---|
| 850 |
|
|---|
| 851 | /* Grow the tables if necessary. */
|
|---|
| 852 | if (RT_SUCCESS(rc) && i + 1 > pThis->cHandlesAllocated)
|
|---|
| 853 | rc = rtPollSetGrow(pThis, pThis->cHandlesAllocated + 32);
|
|---|
| 854 | if (RT_SUCCESS(rc))
|
|---|
| 855 | {
|
|---|
| 856 | /*
|
|---|
| 857 | * Add the handles to the two parallel arrays.
|
|---|
| 858 | */
|
|---|
| 859 | #ifdef RT_OS_WINDOWS
|
|---|
| 860 | pThis->pahNative[i] = (HANDLE)hNative;
|
|---|
| 861 | #elif defined(RT_OS_OS2)
|
|---|
| 862 | pThis->pahNative[i] = hNative;
|
|---|
| 863 | #else
|
|---|
| 864 | pThis->paPollFds[i].fd = (int)hNative;
|
|---|
| 865 | pThis->paPollFds[i].revents = 0;
|
|---|
| 866 | pThis->paPollFds[i].events = 0;
|
|---|
| 867 | if (fEvents & RTPOLL_EVT_READ)
|
|---|
| 868 | pThis->paPollFds[i].events |= POLLIN;
|
|---|
| 869 | if (fEvents & RTPOLL_EVT_WRITE)
|
|---|
| 870 | pThis->paPollFds[i].events |= POLLOUT;
|
|---|
| 871 | if (fEvents & RTPOLL_EVT_ERROR)
|
|---|
| 872 | # ifdef RT_OS_DARWIN
|
|---|
| 873 | pThis->paPollFds[i].events |= POLLERR | POLLHUP;
|
|---|
| 874 | # else
|
|---|
| 875 | pThis->paPollFds[i].events |= POLLERR;
|
|---|
| 876 | # endif
|
|---|
| 877 | #endif
|
|---|
| 878 | pThis->paHandles[i].enmType = pHandle->enmType;
|
|---|
| 879 | pThis->paHandles[i].u = uh;
|
|---|
| 880 | pThis->paHandles[i].id = id;
|
|---|
| 881 | pThis->paHandles[i].fEvents = fEvents;
|
|---|
| 882 | pThis->paHandles[i].fFinalEntry = true;
|
|---|
| 883 |
|
|---|
| 884 | if (iPrev != UINT32_MAX)
|
|---|
| 885 | {
|
|---|
| 886 | Assert(pThis->paHandles[iPrev].fFinalEntry);
|
|---|
| 887 | pThis->paHandles[iPrev].fFinalEntry = false;
|
|---|
| 888 | }
|
|---|
| 889 |
|
|---|
| 890 | /*
|
|---|
| 891 | * Validations and OS specific updates.
|
|---|
| 892 | */
|
|---|
| 893 | #ifdef RT_OS_WINDOWS
|
|---|
| 894 | /* none */
|
|---|
| 895 | #elif defined(RT_OS_OS2)
|
|---|
| 896 | rc = rtPollSetOs2Add(pThis, i, fEvents);
|
|---|
| 897 | #else /* POSIX */
|
|---|
| 898 | if (poll(&pThis->paPollFds[i], 1, 0) < 0)
|
|---|
| 899 | {
|
|---|
| 900 | rc = RTErrConvertFromErrno(errno);
|
|---|
| 901 | pThis->paPollFds[i].fd = -1;
|
|---|
| 902 | }
|
|---|
| 903 | #endif /* POSIX */
|
|---|
| 904 |
|
|---|
| 905 | if (RT_SUCCESS(rc))
|
|---|
| 906 | {
|
|---|
| 907 | /*
|
|---|
| 908 | * Commit it to the set.
|
|---|
| 909 | */
|
|---|
| 910 | pThis->cHandles++; Assert(pThis->cHandles == i + 1);
|
|---|
| 911 | rc = VINF_SUCCESS;
|
|---|
| 912 | }
|
|---|
| 913 | }
|
|---|
| 914 | }
|
|---|
| 915 |
|
|---|
| 916 | ASMAtomicWriteBool(&pThis->fBusy, false);
|
|---|
| 917 | return rc;
|
|---|
| 918 | }
|
|---|
| 919 |
|
|---|
| 920 |
|
|---|
| 921 | RTDECL(int) RTPollSetRemove(RTPOLLSET hPollSet, uint32_t id)
|
|---|
| 922 | {
|
|---|
| 923 | /*
|
|---|
| 924 | * Validate the input.
|
|---|
| 925 | */
|
|---|
| 926 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 927 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
|
|---|
| 928 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
|
|---|
| 929 | AssertReturn(id != UINT32_MAX, VERR_INVALID_PARAMETER);
|
|---|
| 930 |
|
|---|
| 931 | /*
|
|---|
| 932 | * Set the busy flag and do the job.
|
|---|
| 933 | */
|
|---|
| 934 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), VERR_CONCURRENT_ACCESS);
|
|---|
| 935 |
|
|---|
| 936 | int rc = VERR_POLL_HANDLE_ID_NOT_FOUND;
|
|---|
| 937 | uint32_t i = pThis->cHandles;
|
|---|
| 938 | while (i-- > 0)
|
|---|
| 939 | if (pThis->paHandles[i].id == id)
|
|---|
| 940 | {
|
|---|
| 941 | /* Save some details for the duplicate searching. */
|
|---|
| 942 | bool const fFinalEntry = pThis->paHandles[i].fFinalEntry;
|
|---|
| 943 | RTHANDLETYPE const enmType = pThis->paHandles[i].enmType;
|
|---|
| 944 | RTHANDLEUNION const uh = pThis->paHandles[i].u;
|
|---|
| 945 | #ifdef RT_OS_OS2
|
|---|
| 946 | uint32_t fRemovedEvents = pThis->paHandles[i].fEvents;
|
|---|
| 947 | RTHCINTPTR const hNative = pThis->pahNative[i];
|
|---|
| 948 | #endif
|
|---|
| 949 |
|
|---|
| 950 | /* Remove the entry. */
|
|---|
| 951 | pThis->cHandles--;
|
|---|
| 952 | size_t const cToMove = pThis->cHandles - i;
|
|---|
| 953 | if (cToMove)
|
|---|
| 954 | {
|
|---|
| 955 | memmove(&pThis->paHandles[i], &pThis->paHandles[i + 1], cToMove * sizeof(pThis->paHandles[i]));
|
|---|
| 956 | #if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
|
|---|
| 957 | memmove(&pThis->pahNative[i], &pThis->pahNative[i + 1], cToMove * sizeof(pThis->pahNative[i]));
|
|---|
| 958 | #else
|
|---|
| 959 | memmove(&pThis->paPollFds[i], &pThis->paPollFds[i + 1], cToMove * sizeof(pThis->paPollFds[i]));
|
|---|
| 960 | #endif
|
|---|
| 961 | }
|
|---|
| 962 |
|
|---|
| 963 | /* Check for duplicate and set the fFinalEntry flag. */
|
|---|
| 964 | if (fFinalEntry)
|
|---|
| 965 | while (i-- > 0)
|
|---|
| 966 | if ( pThis->paHandles[i].u.uInt == uh.uInt
|
|---|
| 967 | && pThis->paHandles[i].enmType == enmType)
|
|---|
| 968 | {
|
|---|
| 969 | Assert(!pThis->paHandles[i].fFinalEntry);
|
|---|
| 970 | pThis->paHandles[i].fFinalEntry = true;
|
|---|
| 971 | break;
|
|---|
| 972 | }
|
|---|
| 973 |
|
|---|
| 974 | #ifdef RT_OS_OS2
|
|---|
| 975 | /*
|
|---|
| 976 | * Update OS/2 wait structures.
|
|---|
| 977 | */
|
|---|
| 978 | uint32_t fNewEvents = 0;
|
|---|
| 979 | i = pThis->cHandles;
|
|---|
| 980 | while (i-- > 0)
|
|---|
| 981 | if ( pThis->paHandles[i].u.uInt == uh.uInt
|
|---|
| 982 | && pThis->paHandles[i].enmType == enmType)
|
|---|
| 983 | fNewEvents |= pThis->paHandles[i].fEvents;
|
|---|
| 984 | if (enmType == RTHANDLETYPE_PIPE)
|
|---|
| 985 | {
|
|---|
| 986 | pThis->cPipes--;
|
|---|
| 987 | if (fNewEvents == 0)
|
|---|
| 988 | {
|
|---|
| 989 | APIRET orc = DosDeleteMuxWaitSem(pThis->hmux, (HSEM)hNative);
|
|---|
| 990 | AssertMsg(orc == NO_ERROR, ("%d\n", orc));
|
|---|
| 991 | }
|
|---|
| 992 | }
|
|---|
| 993 | else if ( fNewEvents != (fNewEvents | fRemovedEvents)
|
|---|
| 994 | && enmType == RTHANDLETYPE_SOCKET)
|
|---|
| 995 | {
|
|---|
| 996 | fRemovedEvents = fNewEvents ^ (fNewEvents | fRemovedEvents);
|
|---|
| 997 | if (fRemovedEvents & RTPOLL_EVT_ERROR)
|
|---|
| 998 | rtPollSetOs2RemoveSocket(pThis, pThis->cReadSockets + pThis->cWriteSockets, &pThis->cXcptSockets, (int)hNative);
|
|---|
| 999 | if (fRemovedEvents & RTPOLL_EVT_WRITE)
|
|---|
| 1000 | rtPollSetOs2RemoveSocket(pThis, pThis->cReadSockets, &pThis->cWriteSockets, (int)hNative);
|
|---|
| 1001 | if (fRemovedEvents & RTPOLL_EVT_READ)
|
|---|
| 1002 | rtPollSetOs2RemoveSocket(pThis, 0, &pThis->cReadSockets, (int)hNative);
|
|---|
| 1003 | }
|
|---|
| 1004 | #endif /* RT_OS_OS2 */
|
|---|
| 1005 | rc = VINF_SUCCESS;
|
|---|
| 1006 | break;
|
|---|
| 1007 | }
|
|---|
| 1008 |
|
|---|
| 1009 | ASMAtomicWriteBool(&pThis->fBusy, false);
|
|---|
| 1010 | return rc;
|
|---|
| 1011 | }
|
|---|
| 1012 |
|
|---|
| 1013 |
|
|---|
| 1014 | RTDECL(int) RTPollSetQueryHandle(RTPOLLSET hPollSet, uint32_t id, PRTHANDLE pHandle)
|
|---|
| 1015 | {
|
|---|
| 1016 | /*
|
|---|
| 1017 | * Validate the input.
|
|---|
| 1018 | */
|
|---|
| 1019 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 1020 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
|
|---|
| 1021 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
|
|---|
| 1022 | AssertReturn(id != UINT32_MAX, VERR_INVALID_PARAMETER);
|
|---|
| 1023 | AssertPtrNullReturn(pHandle, VERR_INVALID_POINTER);
|
|---|
| 1024 |
|
|---|
| 1025 | /*
|
|---|
| 1026 | * Set the busy flag and do the job.
|
|---|
| 1027 | */
|
|---|
| 1028 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), VERR_CONCURRENT_ACCESS);
|
|---|
| 1029 |
|
|---|
| 1030 | int rc = VERR_POLL_HANDLE_ID_NOT_FOUND;
|
|---|
| 1031 | uint32_t i = pThis->cHandles;
|
|---|
| 1032 | while (i-- > 0)
|
|---|
| 1033 | if (pThis->paHandles[i].id == id)
|
|---|
| 1034 | {
|
|---|
| 1035 | if (pHandle)
|
|---|
| 1036 | {
|
|---|
| 1037 | pHandle->enmType = pThis->paHandles[i].enmType;
|
|---|
| 1038 | pHandle->u = pThis->paHandles[i].u;
|
|---|
| 1039 | }
|
|---|
| 1040 | rc = VINF_SUCCESS;
|
|---|
| 1041 | break;
|
|---|
| 1042 | }
|
|---|
| 1043 |
|
|---|
| 1044 | ASMAtomicWriteBool(&pThis->fBusy, false);
|
|---|
| 1045 | return rc;
|
|---|
| 1046 | }
|
|---|
| 1047 |
|
|---|
| 1048 |
|
|---|
| 1049 | RTDECL(uint32_t) RTPollSetGetCount(RTPOLLSET hPollSet)
|
|---|
| 1050 | {
|
|---|
| 1051 | /*
|
|---|
| 1052 | * Validate the input.
|
|---|
| 1053 | */
|
|---|
| 1054 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 1055 | AssertPtrReturn(pThis, UINT32_MAX);
|
|---|
| 1056 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, UINT32_MAX);
|
|---|
| 1057 |
|
|---|
| 1058 | /*
|
|---|
| 1059 | * Set the busy flag and do the job.
|
|---|
| 1060 | */
|
|---|
| 1061 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), UINT32_MAX);
|
|---|
| 1062 | uint32_t cHandles = pThis->cHandles;
|
|---|
| 1063 | ASMAtomicWriteBool(&pThis->fBusy, false);
|
|---|
| 1064 |
|
|---|
| 1065 | return cHandles;
|
|---|
| 1066 | }
|
|---|
| 1067 |
|
|---|
| 1068 | RTDECL(int) RTPollSetEventsChange(RTPOLLSET hPollSet, uint32_t id, uint32_t fEvents)
|
|---|
| 1069 | {
|
|---|
| 1070 | /*
|
|---|
| 1071 | * Validate the input.
|
|---|
| 1072 | */
|
|---|
| 1073 | RTPOLLSETINTERNAL *pThis = hPollSet;
|
|---|
| 1074 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
|
|---|
| 1075 | AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
|
|---|
| 1076 | AssertReturn(id != UINT32_MAX, VERR_INVALID_PARAMETER);
|
|---|
| 1077 | AssertReturn(!(fEvents & ~RTPOLL_EVT_VALID_MASK), VERR_INVALID_PARAMETER);
|
|---|
| 1078 | AssertReturn(fEvents, VERR_INVALID_PARAMETER);
|
|---|
| 1079 |
|
|---|
| 1080 | /*
|
|---|
| 1081 | * Set the busy flag and do the job.
|
|---|
| 1082 | */
|
|---|
| 1083 | AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true, false), VERR_CONCURRENT_ACCESS);
|
|---|
| 1084 |
|
|---|
| 1085 | int rc = VERR_POLL_HANDLE_ID_NOT_FOUND;
|
|---|
| 1086 | uint32_t i = pThis->cHandles;
|
|---|
| 1087 | while (i-- > 0)
|
|---|
| 1088 | if (pThis->paHandles[i].id == id)
|
|---|
| 1089 | {
|
|---|
| 1090 | if (pThis->paHandles[i].fEvents != fEvents)
|
|---|
| 1091 | {
|
|---|
| 1092 | #if defined(RT_OS_WINDOWS)
|
|---|
| 1093 | /*nothing*/
|
|---|
| 1094 | #elif defined(RT_OS_OS2)
|
|---|
| 1095 | if (pThis->paHandles[i].enmType == RTHANDLETYPE_SOCKET)
|
|---|
| 1096 | {
|
|---|
| 1097 | uint32_t fOldEvents = 0;
|
|---|
| 1098 | uint32_t j = pThis->cHandles;
|
|---|
| 1099 | while (j-- > 0)
|
|---|
| 1100 | if ( pThis->paHandles[j].enmType == RTHANDLETYPE_SOCKET
|
|---|
| 1101 | && pThis->paHandles[j].u.uInt == pThis->paHandles[i].u.uInt
|
|---|
| 1102 | && j != i)
|
|---|
| 1103 | fOldEvents |= pThis->paHandles[j].fEvents;
|
|---|
| 1104 | uint32_t fNewEvents = fOldEvents | fEvents;
|
|---|
| 1105 | fOldEvents |= pThis->paHandles[i].fEvents;
|
|---|
| 1106 | if (fOldEvents != fEvents)
|
|---|
| 1107 | {
|
|---|
| 1108 | int const fdSocket = pThis->pahNative[i];
|
|---|
| 1109 | uint32_t const fChangedEvents = fOldEvents ^ fNewEvents;
|
|---|
| 1110 |
|
|---|
| 1111 | if ((fChangedEvents & RTPOLL_EVT_READ) && (fNewEvents & RTPOLL_EVT_READ))
|
|---|
| 1112 | rtPollSetOs2AddSocket(pThis, pThis->cReadSockets, &pThis->cReadSockets, fdSocket);
|
|---|
| 1113 | else if (fChangedEvents & RTPOLL_EVT_READ)
|
|---|
| 1114 | rtPollSetOs2RemoveSocket(pThis, 0, &pThis->cReadSockets, fdSocket);
|
|---|
| 1115 |
|
|---|
| 1116 | if ((fChangedEvents & RTPOLL_EVT_WRITE) && (fNewEvents & RTPOLL_EVT_WRITE))
|
|---|
| 1117 | rtPollSetOs2AddSocket(pThis, pThis->cReadSockets + pThis->cWriteSockets,
|
|---|
| 1118 | &pThis->cWriteSockets, fdSocket);
|
|---|
| 1119 | else if (fChangedEvents & RTPOLL_EVT_WRITE)
|
|---|
| 1120 | rtPollSetOs2RemoveSocket(pThis, pThis->cReadSockets, &pThis->cWriteSockets, fdSocket);
|
|---|
| 1121 |
|
|---|
| 1122 | if ((fChangedEvents & RTPOLL_EVT_ERROR) && (fNewEvents & RTPOLL_EVT_ERROR))
|
|---|
| 1123 | rtPollSetOs2AddSocket(pThis, pThis->cReadSockets + pThis->cWriteSockets + pThis->cXcptSockets,
|
|---|
| 1124 | &pThis->cXcptSockets, fdSocket);
|
|---|
| 1125 | else if (fChangedEvents & RTPOLL_EVT_ERROR)
|
|---|
| 1126 | rtPollSetOs2RemoveSocket(pThis, pThis->cReadSockets + pThis->cWriteSockets, &pThis->cXcptSockets,
|
|---|
| 1127 | fdSocket);
|
|---|
| 1128 | }
|
|---|
| 1129 | }
|
|---|
| 1130 | #else
|
|---|
| 1131 | pThis->paPollFds[i].events = 0;
|
|---|
| 1132 | if (fEvents & RTPOLL_EVT_READ)
|
|---|
| 1133 | pThis->paPollFds[i].events |= POLLIN;
|
|---|
| 1134 | if (fEvents & RTPOLL_EVT_WRITE)
|
|---|
| 1135 | pThis->paPollFds[i].events |= POLLOUT;
|
|---|
| 1136 | if (fEvents & RTPOLL_EVT_ERROR)
|
|---|
| 1137 | pThis->paPollFds[i].events |= POLLERR;
|
|---|
| 1138 | #endif
|
|---|
| 1139 | pThis->paHandles[i].fEvents = fEvents;
|
|---|
| 1140 | }
|
|---|
| 1141 | rc = VINF_SUCCESS;
|
|---|
| 1142 | break;
|
|---|
| 1143 | }
|
|---|
| 1144 |
|
|---|
| 1145 | ASMAtomicWriteBool(&pThis->fBusy, false);
|
|---|
| 1146 | return rc;
|
|---|
| 1147 | }
|
|---|
| 1148 |
|
|---|
