service_runtime/nacl_desc_mutex.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.  Mutex 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 #include "native_client/service_runtime/internal_errno.h"
  49
  50 #include "native_client/service_runtime/include/sys/errno.h"
  51 #include "native_client/service_runtime/include/sys/fcntl.h"
  52 #include "native_client/service_runtime/include/sys/mman.h"
  53
  54 #include "native_client/intermodule_comm/nacl_imc_c.h"
  55
  56 /*
  57  * This file contains the implementation for the NaClDescMutex subclass
  58  * of NaClDesc.
  59  *
  60  * NaClDescMutex is the subclass that wraps host-OS mutex abstractions
  61  */
  62
  63 /*
  64  * Takes ownership of hd, will close in Dtor.
  65  */
  66 int NaClDescMutexCtor(struct NaClDescMutex  *self)
  67 {
  68   struct NaClDesc *basep = (struct NaClDesc *) self;
  69
  70   basep->vtbl = (struct NaClDescVtbl *) NULL;
  71   if (!NaClDescCtor(basep)) {
  72     return 0;
  73   }
  74   if (!NaClIntrMutexCtor(&self->mu)) {
  75     NaClDescDtor(basep);
  76     return 0;
  77   }
  78
  79   basep->vtbl = &kNaClDescMutexVtbl;
  80   return 1;
  81 }
  82
  83 void NaClDescMutexDtor(struct NaClDesc *vself)
  84 {
  85   struct NaClDescMutex *self = (struct NaClDescMutex *) vself;
  86
  87   NaClLog(4, "NaClDescMutexDtor(0x%08"PRIxPTR").\n",
  88           (uintptr_t) vself);
  89   NaClIntrMutexDtor(&self->mu);
  90   vself->vtbl = (struct NaClDescVtbl *) NULL;
  91   NaClDescDtor(&self->base);
  92 }
  93
  94 int NaClDescMutexClose(struct NaClDesc          *vself,
  95                        struct NaClDescEffector  *effp)
  96 {
  97   NaClDescUnref(vself);
  98   return 0;
  99 }
 100
 101 int NaClDescMutexLock(struct NaClDesc         *vself,
 102                       struct NaClDescEffector *effp)
 103 {
 104   struct NaClDescMutex *self = (struct NaClDescMutex *) vself;
 105
 106   NaClSyncStatus status = NaClIntrMutexLock(&self->mu);
 107   return -NaClXlateNaClSyncStatus(status);
 108 }
 109
 110 int NaClDescMutexTryLock(struct NaClDesc          *vself,
 111                          struct NaClDescEffector  *effp)
 112 {
 113   struct NaClDescMutex *self = (struct NaClDescMutex *) vself;
 114
 115   NaClSyncStatus status = NaClIntrMutexTryLock(&self->mu);
 116   return -NaClXlateNaClSyncStatus(status);
 117 }
 118
 119 int NaClDescMutexUnlock(struct NaClDesc         *vself,
 120                         struct NaClDescEffector *effp)
 121 {
 122   struct NaClDescMutex *self = (struct NaClDescMutex *) vself;
 123
 124   NaClSyncStatus status = NaClIntrMutexUnlock(&self->mu);
 125   return -NaClXlateNaClSyncStatus(status);
 126 }
 127
 128 struct NaClDescVtbl const kNaClDescMutexVtbl = {
 129   NaClDescMutexDtor,
 130   NaClDescMapNotImplemented,
 131   NaClDescUnmapUnsafeNotImplemented,
 132   NaClDescUnmapNotImplemented,
 133   NaClDescReadNotImplemented,
 134   NaClDescWriteNotImplemented,
 135   NaClDescSeekNotImplemented,
 136   NaClDescIoctlNotImplemented,
 137   NaClDescFstatNotImplemented,
 138   NaClDescMutexClose,
 139   NaClDescGetdentsNotImplemented,
 140   NACL_DESC_MUTEX,
 141   NaClDescExternalizeSizeNotImplemented,
 142   NaClDescExternalizeNotImplemented,
 143   NaClDescMutexLock,
 144   NaClDescMutexTryLock,
 145   NaClDescMutexUnlock,
 146   NaClDescWaitNotImplemented,
 147   NaClDescTimedWaitAbsNotImplemented,
 148   NaClDescSignalNotImplemented,
 149   NaClDescBroadcastNotImplemented,
 150   NaClDescSendMsgNotImplemented,
 151   NaClDescRecvMsgNotImplemented,
 152   NaClDescConnectAddrNotImplemented,
 153   NaClDescAcceptConnNotImplemented,
 154   NaClDescPostNotImplemented,
 155   NaClDescSemWaitNotImplemented,
 156   NaClDescGetValueNotImplemented,
 157 };
 158
 159 int NaClDescMutexInternalize(struct NaClDesc           **baseptr,
 160                              struct NaClDescXferState  *xfer)
 161 {
 162   NaClLog(LOG_ERROR, "NaClDescMutexInternalize: not shared yet\n");
 163   return -NACL_ABI_EINVAL;
 164 }