src/native_client/src/trusted/gio/gio_nacl_desc.c

   1 /*
   2  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #include "native_client/src/include/portability.h"
   8
   9 #include "native_client/src/shared/platform/nacl_check.h"
  10 #include "native_client/src/shared/platform/nacl_log.h"
  11
  12 #include "native_client/src/trusted/gio/gio_nacl_desc.h"
  13
  14 #include "native_client/src/trusted/desc/nacl_desc_base.h"
  15
  16 const struct GioVtbl kNaClGioNaClDescVtbl;
  17
  18 int NaClGioNaClDescCtor(struct NaClGioNaClDesc  *self,
  19                         struct NaClDesc         *wrapped) {
  20   self->wrapped = NaClDescRef(wrapped);
  21   NACL_VTBL(Gio, self) = &kNaClGioNaClDescVtbl;
  22   return 1;
  23 }
  24
  25 static ssize_t NaClGioNaClDescRead(struct Gio *vself,
  26                                    void       *buf,
  27                                    size_t     count) {
  28   struct NaClGioNaClDesc *self = (struct NaClGioNaClDesc *) vself;
  29
  30   return (*NACL_VTBL(NaClDesc, self->wrapped)->
  31           Read)(self->wrapped, buf, count);
  32 }
  33
  34 static ssize_t NaClGioNaClDescWrite(struct Gio *vself,
  35                                     void const *buf,
  36                                     size_t     count) {
  37   struct NaClGioNaClDesc *self = (struct NaClGioNaClDesc *) vself;
  38
  39   return (*NACL_VTBL(NaClDesc, self->wrapped)->
  40           Write)(self->wrapped, buf, count);
  41 }
  42
  43 static off_t NaClGioNaClDescSeek(struct Gio *vself,
  44                                  off_t      offset,
  45                                  int        whence) {
  46   struct NaClGioNaClDesc *self = (struct NaClGioNaClDesc *) vself;
  47
  48   return (off_t) (*NACL_VTBL(NaClDesc, self->wrapped)->
  49                   Seek)(self->wrapped, (nacl_off64_t) offset, whence);
  50 }
  51
  52 static int NaClGioNaClDescFlush(struct Gio *vself) {
  53   UNREFERENCED_PARAMETER(vself);
  54   return 0;
  55 }
  56
  57 static int NaClGioNaClDescClose(struct Gio *vself) {
  58   struct NaClGioNaClDesc *self = (struct NaClGioNaClDesc *) vself;
  59
  60   NaClDescUnref(self->wrapped);
  61   self->wrapped = 0;
  62   return 0;
  63 }
  64
  65 static void NaClGioNaClDescDtor(struct Gio *vself) {
  66   struct NaClGioNaClDesc *self = (struct NaClGioNaClDesc *) vself;
  67
  68   if (NULL != self->wrapped) {
  69     NaClDescUnref(self->wrapped);
  70     self->wrapped = 0;
  71   }
  72   NACL_VTBL(Gio, self) = NULL;
  73   /* Gio base class has no Dtor */
  74 }
  75
  76 const struct GioVtbl kNaClGioNaClDescVtbl = {
  77   NaClGioNaClDescDtor,
  78   NaClGioNaClDescRead,
  79   NaClGioNaClDescWrite,
  80   NaClGioNaClDescSeek,
  81   NaClGioNaClDescFlush,
  82   NaClGioNaClDescClose,
  83 };