service_runtime/nacl_desc_cond.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Service Runtime.  Condition Variable Descriptor / Handle abstraction.
  34  */
  35
  36 #include "native_client/include/portability.h"
  37
  38 #include <stdlib.h>
  39
  40 #if NACL_WINDOWS
  41 # include "io.h"
  42 #endif
  43
  44 #include "native_client/service_runtime/nacl_config.h"
  45 #include "native_client/service_runtime/nacl_log.h"
  46 #include "native_client/service_runtime/nacl_desc_base.h"
  47 #include "native_client/service_runtime/nacl_desc_mutex.h"
  48
  49 #include "native_client/service_runtime/include/sys/errno.h"
  50 #include "native_client/service_runtime/include/sys/fcntl.h"
  51 #include "native_client/service_runtime/include/sys/mman.h"
  52
  53 #include "native_client/intermodule_comm/nacl_imc_c.h"
  54
  55 /*
  56  * This file contains the implementation for the NaClDescCondVar subclass
  57  * of NaClDesc.
  58  *
  59  * NaClDescCondVar is the subclass that wraps host-OS condition
  60  * variable abstractions
  61  */
  62
  63 int NaClDescCondVarCtor(struct NaClDescCondVar  *self)
  64 {
  65   struct NaClDesc *basep = (struct NaClDesc *) self;
  66
  67   if (!NaClDescCtor(basep)) {
  68     return 0;
  69   }
  70   if (!NaClIntrCondVarCtor(&self->cv)) {
  71     NaClDescDtor(basep);
  72     return 0;
  73   }
  74
  75   basep->vtbl = &kNaClDescCondVarVtbl;
  76   return 1;
  77 }
  78
  79 void NaClDescCondVarDtor(struct NaClDesc *vself)
  80 {
  81   struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
  82
  83   NaClLog(4, "NaClDescCondVarDtor(0x%08x).\n",
  84           (uintptr_t) vself);
  85   NaClIntrCondVarDtor(&self->cv);
  86
  87   NaClDescDtor(&self->base);
  88 }
  89
  90 int NaClDescCondVarClose(struct NaClDesc          *vself,
  91                          struct NaClDescEffector  *effp)
  92 {
  93   NaClDescUnref(vself);
  94   return 0;
  95 }
  96
  97
  98
  99 int NaClDescCondVarWait(struct NaClDesc         *vself,
 100                         struct NaClDescEffector *effp,
 101                         struct NaClDesc         *mutex)
 102 {
 103   struct NaClDescCondVar  *self = (struct NaClDescCondVar *) vself;
 104   struct NaClDescMutex    *mutex_desc;
 105   NaClSyncStatus          status;
 106
 107   if (mutex->vtbl->typeTag != NACL_DESC_MUTEX) {
 108     return -NACL_ABI_EINVAL;
 109   }
 110   mutex_desc = (struct NaClDescMutex *)mutex;
 111   status = NaClIntrCondVarWait(&self->cv,
 112                                &mutex_desc->mu,
 113                                NULL);
 114   return -NaClXlateNaClSyncStatus(status);
 115 }
 116
 117 int NaClDescCondVarTimedWaitAbs(struct NaClDesc           *vself,
 118                                 struct NaClDescEffector   *effp,
 119                                 struct NaClDesc           *mutex,
 120                                 struct nacl_abi_timespec  *ts)
 121 {
 122   struct NaClDescCondVar  *self = (struct NaClDescCondVar *) vself;
 123   struct NaClDescMutex    *mutex_desc;
 124   NaClSyncStatus          status;
 125
 126   if (mutex->vtbl->typeTag != NACL_DESC_MUTEX) {
 127     return -NACL_ABI_EINVAL;
 128   }
 129   mutex_desc = (struct NaClDescMutex *) mutex;
 130
 131   status = NaClIntrCondVarWait(&self->cv,
 132                                &mutex_desc->mu,
 133                                ts);
 134   return -NaClXlateNaClSyncStatus(status);
 135 }
 136
 137 int NaClDescCondVarSignal(struct NaClDesc         *vself,
 138                           struct NaClDescEffector *effp)
 139 {
 140   struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
 141
 142   NaClSyncStatus status = NaClIntrCondVarSignal(&self->cv);
 143   return -NaClXlateNaClSyncStatus(status);
 144 }
 145
 146 int NaClDescCondVarBroadcast(struct NaClDesc          *vself,
 147                              struct NaClDescEffector  *effp)
 148 {
 149   struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
 150
 151   NaClSyncStatus status = NaClIntrCondVarBroadcast(&self->cv);
 152   return -NaClXlateNaClSyncStatus(status);
 153 }
 154
 155 struct NaClDescVtbl const kNaClDescCondVarVtbl = {
 156   NaClDescCondVarDtor,
 157   NaClDescMapNotImplemented,
 158   NaClDescUnmapUnsafeNotImplemented,
 159   NaClDescUnmapNotImplemented,
 160   NaClDescReadNotImplemented,
 161   NaClDescWriteNotImplemented,
 162   NaClDescSeekNotImplemented,
 163   NaClDescIoctlNotImplemented,
 164   NaClDescFstatNotImplemented,
 165   NaClDescCondVarClose,
 166   NaClDescGetdentsNotImplemented,
 167   NACL_DESC_CONDVAR,
 168   NaClDescExternalizeSizeNotImplemented,
 169   NaClDescExternalizeNotImplemented,
 170   NaClDescLockNotImplemented,
 171   NaClDescTryLockNotImplemented,
 172   NaClDescUnlockNotImplemented,
 173   NaClDescCondVarWait,
 174   NaClDescCondVarTimedWaitAbs,
 175   NaClDescCondVarSignal,
 176   NaClDescCondVarBroadcast,
 177   NaClDescSendMsgNotImplemented,
 178   NaClDescRecvMsgNotImplemented,
 179   NaClDescConnectAddrNotImplemented,
 180   NaClDescAcceptConnNotImplemented,
 181   NaClDescPostNotImplemented,
 182   NaClDescSemWaitNotImplemented,
 183   NaClDescGetValueNotImplemented,
 184 };
 185
 186 int NaClDescCondVarInternalize(struct NaClDesc           **baseptr,
 187                                struct NaClDescXferState  *xfer)
 188 {
 189   NaClLog(LOG_ERROR, "NaClDescCondVarInternalize: not shared yet\n");
 190   return -NACL_ABI_EINVAL;
 191 }