service_runtime/win/nacl_threads.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 Server Runtime threads implementation layer.
  34  */
  35
  36 #include <process.h>
  37 #include <string.h>
  38 #include <sys/types.h>
  39 #include <signal.h>
  40
  41 #include "native_client/service_runtime/nacl_config.h"
  42 #include "native_client/service_runtime/nacl_threads.h"
  43 #include "native_client/service_runtime/nacl_log.h"
  44
  45 int NaClThreadCtor(struct NaClThread  *ntp,
  46                    void               (WINAPI *start_fn)(void *),
  47                    void               *state,
  48                    size_t             stack_size)
  49 {
  50   HANDLE handle;
  51
  52   if (0 == (handle = (HANDLE) _beginthreadex(NULL,      /* default security */
  53                                    stack_size,
  54                                    (unsigned (WINAPI *)(void *))  start_fn,
  55                                    /* the argument for the thread function */
  56                                    state,
  57                                    0,          /*start running */
  58                                    NULL))) {   /* we don't need the thread id */
  59     NaClLog(LOG_ERROR,
  60             "nacl_thread: _beginthreadex failed, errno %d",
  61             errno);
  62     return 0;
  63   }
  64   ntp->tid = handle;  // we need the handle to kill the thread etc.
  65
  66   return 1;
  67 }
  68
  69 void NaClThreadDtor(struct NaClThread *ntp)
  70 {
  71   /*
  72    * the handle is not closed when the thread exits because we are
  73    * using _beginthreadex and not _beginthread, so we must close it
  74    * manually
  75    */
  76   CloseHandle(ntp->tid);
  77 }
  78
  79 void NaClThreadExit(void)
  80 {
  81   _endthreadex(0);
  82 }
  83
  84 void NaClThreadKill(struct NaClThread *target)
  85 {
  86   TerminateThread(target->tid, 0);
  87 }
  88
  89 int NaClTsdKeyCreate(struct NaClTsdKey  *tsdp)
  90 {
  91   int key;
  92
  93   key = TlsAlloc();
  94
  95   if (key == TLS_OUT_OF_INDEXES) {
  96     NaClLog(LOG_ERROR,
  97             "NaClTsdKeyCreate: could not create new key, error code %d",
  98             GetLastError());
  99     return 0;
 100   }
 101
 102   tsdp->key = key;
 103   return 1;
 104 }
 105
 106 int NaClTsdSetSpecific(struct NaClTsdKey  *tsdp,
 107                        void const         *ptr)
 108 {
 109   int res;
 110
 111   res = TlsSetValue(tsdp->key, (void *) ptr);  /* const_cast<void *>(ptr) */
 112
 113   if (0 == res) {
 114     NaClLog(LOG_ERROR,
 115             "NaClTsdSetSpecific: could not set new value, error code %d",
 116             res);
 117     return 0;
 118   }
 119   return 1;
 120 }
 121
 122 void *NaClTsdGetSpecific(struct NaClTsdKey  *tsdp)
 123 {
 124   return TlsGetValue(tsdp->key);
 125 }