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   basep->vtbl = (struct NaClDescVtbl *) NULL;
  68   if (!NaClDescCtor(basep)) {
  69     return 0;
  70   }
  71   if (!NaClIntrCondVarCtor(&self->cv)) {
  72     NaClDescDtor(basep);
  73     return 0;
  74   }
  75
  76   basep->vtbl = &kNaClDescCondVarVtbl;
  77   return 1;
  78 }
  79
  80 void NaClDescCondVarDtor(struct NaClDesc *vself)
  81 {
  82   struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
  83
  84   NaClLog(4, "NaClDescCondVarDtor(0x%08"PRIxPTR").\n",
  85           (uintptr_t) vself);
  86   NaClIntrCondVarDtor(&self->cv);
  87
  88   vself->vtbl = (struct NaClDescVtbl *) NULL;
  89   NaClDescDtor(&self->base);
  90 }
  91
  92 int NaClDescCondVarClose(struct NaClDesc          *vself,
  93                          struct NaClDescEffector  *effp)
  94 {
  95   NaClDescUnref(vself);
  96   return 0;
  97 }
  98
  99
 100
 101 int NaClDescCondVarWait(struct NaClDesc         *vself,
 102                         struct NaClDescEffector *effp,
 103                         struct NaClDesc         *mutex)
 104 {
 105   struct NaClDescCondVar  *self = (struct NaClDescCondVar *) vself;
 106   struct NaClDescMutex    *mutex_desc;
 107   NaClSyncStatus          status;
 108
 109   if (mutex->vtbl->typeTag != NACL_DESC_MUTEX) {
 110     return -NACL_ABI_EINVAL;
 111   }
 112   mutex_desc = (struct NaClDescMutex *)mutex;
 113   status = NaClIntrCondVarWait(&self->cv,
 114                                &mutex_desc->mu,
 115                                NULL);
 116   return -NaClXlateNaClSyncStatus(status);
 117 }
 118
 119 int NaClDescCondVarTimedWaitAbs(struct NaClDesc           *vself,
 120                                 struct NaClDescEffector   *effp,
 121                                 struct NaClDesc           *mutex,
 122                                 struct nacl_abi_timespec  *ts)
 123 {
 124   struct NaClDescCondVar  *self = (struct NaClDescCondVar *) vself;
 125   struct NaClDescMutex    *mutex_desc;
 126   NaClSyncStatus          status;
 127
 128   if (mutex->vtbl->typeTag != NACL_DESC_MUTEX) {
 129     return -NACL_ABI_EINVAL;
 130   }
 131   mutex_desc = (struct NaClDescMutex *) mutex;
 132
 133   status = NaClIntrCondVarWait(&self->cv,
 134                                &mutex_desc->mu,
 135                                ts);
 136   return -NaClXlateNaClSyncStatus(status);
 137 }
 138
 139 int NaClDescCondVarSignal(struct NaClDesc         *vself,
 140                           struct NaClDescEffector *effp)
 141 {
 142   struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
 143
 144   NaClSyncStatus status = NaClIntrCondVarSignal(&self->cv);
 145   return -NaClXlateNaClSyncStatus(status);
 146 }
 147
 148 int NaClDescCondVarBroadcast(struct NaClDesc          *vself,
 149                              struct NaClDescEffector  *effp)
 150 {
 151   struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
 152
 153   NaClSyncStatus status = NaClIntrCondVarBroadcast(&self->cv);
 154   return -NaClXlateNaClSyncStatus(status);
 155 }
 156
 157 struct NaClDescVtbl const kNaClDescCondVarVtbl = {
 158   NaClDescCondVarDtor,
 159   NaClDescMapNotImplemented,
 160   NaClDescUnmapUnsafeNotImplemented,
 161   NaClDescUnmapNotImplemented,
 162   NaClDescReadNotImplemented,
 163   NaClDescWriteNotImplemented,
 164   NaClDescSeekNotImplemented,
 165   NaClDescIoctlNotImplemented,
 166   NaClDescFstatNotImplemented,
 167   NaClDescCondVarClose,
 168   NaClDescGetdentsNotImplemented,
 169   NACL_DESC_CONDVAR,
 170   NaClDescExternalizeSizeNotImplemented,
 171   NaClDescExternalizeNotImplemented,
 172   NaClDescLockNotImplemented,
 173   NaClDescTryLockNotImplemented,
 174   NaClDescUnlockNotImplemented,
 175   NaClDescCondVarWait,
 176   NaClDescCondVarTimedWaitAbs,
 177   NaClDescCondVarSignal,
 178   NaClDescCondVarBroadcast,
 179   NaClDescSendMsgNotImplemented,
 180   NaClDescRecvMsgNotImplemented,
 181   NaClDescConnectAddrNotImplemented,
 182   NaClDescAcceptConnNotImplemented,
 183   NaClDescPostNotImplemented,
 184   NaClDescSemWaitNotImplemented,
 185   NaClDescGetValueNotImplemented,
 186 };
 187
 188 int NaClDescCondVarInternalize(struct NaClDesc           **baseptr,
 189                                struct NaClDescXferState  *xfer)
 190 {
 191   NaClLog(LOG_ERROR, "NaClDescCondVarInternalize: not shared yet\n");
 192   return -NACL_ABI_EINVAL;
 193 }