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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/proxy/serialized_handle.h"
#include "base/memory/shared_memory.h"
#include "base/pickle.h"
#include "base/platform_file.h"
#include "build/build_config.h"
#include "ipc/ipc_platform_file.h"
#if defined(OS_NACL)
#include <unistd.h>
#endif
namespace ppapi {
namespace proxy {
SerializedHandle::SerializedHandle()
: type_(INVALID),
shm_handle_(base::SharedMemory::NULLHandle()),
size_(0),
descriptor_(IPC::InvalidPlatformFileForTransit()),
open_flags_(0),
file_io_(0) {
}
SerializedHandle::SerializedHandle(Type type_param)
: type_(type_param),
shm_handle_(base::SharedMemory::NULLHandle()),
size_(0),
descriptor_(IPC::InvalidPlatformFileForTransit()),
open_flags_(0),
file_io_(0) {
}
SerializedHandle::SerializedHandle(const base::SharedMemoryHandle& handle,
uint32 size)
: type_(SHARED_MEMORY),
shm_handle_(handle),
size_(size),
descriptor_(IPC::InvalidPlatformFileForTransit()),
open_flags_(0),
file_io_(0) {
}
SerializedHandle::SerializedHandle(
Type type,
const IPC::PlatformFileForTransit& socket_descriptor)
: type_(type),
shm_handle_(base::SharedMemory::NULLHandle()),
size_(0),
descriptor_(socket_descriptor),
open_flags_(0),
file_io_(0) {
}
bool SerializedHandle::IsHandleValid() const {
switch (type_) {
case SHARED_MEMORY:
return base::SharedMemory::IsHandleValid(shm_handle_);
case SOCKET:
case FILE:
return !(IPC::InvalidPlatformFileForTransit() == descriptor_);
case INVALID:
return false;
// No default so the compiler will warn us if a new type is added.
}
return false;
}
void SerializedHandle::Close() {
if (IsHandleValid()) {
switch (type_) {
case INVALID:
NOTREACHED();
break;
case SHARED_MEMORY:
base::SharedMemory::CloseHandle(shm_handle_);
break;
case SOCKET:
case FILE:
base::PlatformFile file =
IPC::PlatformFileForTransitToPlatformFile(descriptor_);
#if !defined(OS_NACL)
base::ClosePlatformFile(file);
#else
close(file);
#endif
break;
// No default so the compiler will warn us if a new type is added.
}
}
*this = SerializedHandle();
}
// static
bool SerializedHandle::WriteHeader(const Header& hdr, Pickle* pickle) {
if (!pickle->WriteInt(hdr.type))
return false;
if (hdr.type == SHARED_MEMORY) {
if (!pickle->WriteUInt32(hdr.size))
return false;
}
if (hdr.type == FILE) {
if (!pickle->WriteInt(hdr.open_flags) || !pickle->WriteInt(hdr.file_io))
return false;
}
return true;
}
// static
bool SerializedHandle::ReadHeader(PickleIterator* iter, Header* hdr) {
*hdr = Header(INVALID, 0, 0, 0);
int type = 0;
if (!iter->ReadInt(&type))
return false;
bool valid_type = false;
switch (type) {
case SHARED_MEMORY: {
uint32 size = 0;
if (!iter->ReadUInt32(&size))
return false;
hdr->size = size;
valid_type = true;
break;
}
case FILE: {
int open_flags = 0;
PP_Resource file_io = 0;
if (!iter->ReadInt(&open_flags) || !iter->ReadInt(&file_io))
return false;
hdr->open_flags = open_flags;
hdr->file_io = file_io;
valid_type = true;
}
case SOCKET:
case INVALID:
valid_type = true;
break;
// No default so the compiler will warn us if a new type is added.
}
if (valid_type)
hdr->type = Type(type);
return valid_type;
}
} // namespace proxy
} // namespace ppapi
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