The Tor Browser: ipc/chromium/src/chrome/common/transport_dib

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     5 #include "chrome/common/transport_dib.h"

     7 #include <unistd.h>

     8 #include <sys/stat.h>

    10 #include "base/eintr_wrapper.h"

    11 #include "base/shared_memory.h"

    13 TransportDIB::TransportDIB()

    14     : size_(0) {

    15 }

    17 TransportDIB::TransportDIB(TransportDIB::Handle dib)

    18     : shared_memory_(dib, false /* read write */),

    19       size_(0) {

    20 }

    22 TransportDIB::~TransportDIB() {

    23 }

    25 // static

    26 TransportDIB* TransportDIB::Create(size_t size, uint32_t sequence_num) {

    27   TransportDIB* dib = new TransportDIB;

    28   if (!dib->shared_memory_.Create("", false /* read write */,

    29                                   false /* do not open existing */, size)) {

    30     delete dib;

    31     return NULL;

    32   }

    34   dib->size_ = size;

    35   return dib;

    36 }

    38 // static

    39 TransportDIB* TransportDIB::Map(TransportDIB::Handle handle) {

    40   TransportDIB* dib = new TransportDIB(handle);

    41   struct stat st;

    42   fstat(handle.fd, &st);

    44   if (!dib->shared_memory_.Map(st.st_size)) {

    45     delete dib;

    46     HANDLE_EINTR(close(handle.fd));

    47     return nullptr;

    48   }

    50   dib->size_ = st.st_size;

    52   return dib;

    53 }

    55 void* TransportDIB::memory() const {

    56   return shared_memory_.memory();

    57 }

    59 TransportDIB::Id TransportDIB::id() const {

    60   return shared_memory_.id();

    61 }

    63 TransportDIB::Handle TransportDIB::handle() const {

    64   return shared_memory_.handle();

    65 }

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