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// Copyright 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.
#ifndef GIN_V8_INITIALIZER_H_
#define GIN_V8_INITIALIZER_H_
#include "base/files/file.h"
#include "gin/array_buffer.h"
#include "gin/gin_export.h"
#include "gin/public/isolate_holder.h"
#include "gin/public/v8_platform.h"
#include "v8/include/v8.h"
namespace gin {
class GIN_EXPORT V8Initializer {
public:
// This should be called by IsolateHolder::Initialize().
static void Initialize(gin::IsolateHolder::ScriptMode mode);
// Get address and size information for currently loaded snapshot.
// If no snapshot is loaded, the return values are null for addresses
// and 0 for sizes.
static void GetV8ExternalSnapshotData(const char** natives_data_out,
int* natives_size_out,
const char** snapshot_data_out,
int* snapshot_size_out);
#if defined(V8_USE_EXTERNAL_STARTUP_DATA)
// Load V8 snapshot from user provided platform file descriptors.
// The offset and size arguments, if non-zero, specify the portions
// of the files to be loaded. Since the VM can boot with or without
// the snapshot, this function does not return a status.
static void LoadV8SnapshotFromFD(base::PlatformFile snapshot_fd,
int64 snapshot_offset,
int64 snapshot_size);
// Similar to LoadV8SnapshotFromFD, but for the source of the natives.
// Without the natives we cannot continue, so this function contains
// release mode asserts and won't return if it fails.
static void LoadV8NativesFromFD(base::PlatformFile natives_fd,
int64 natives_offset,
int64 natives_size);
// Load V8 snapshot from default resources, if they are available.
static void LoadV8Snapshot();
// Load V8 natives source from default resources. Contains asserts
// so that it will not return if natives cannot be loaded.
static void LoadV8Natives();
// Opens the V8 snapshot data files and returns open file descriptors to these
// files in |natives_fd_out| and |snapshot_fd_out|, which can be passed to
// child processes.
static bool OpenV8FilesForChildProcesses(base::PlatformFile* natives_fd_out,
base::PlatformFile* snapshot_fd_out)
WARN_UNUSED_RESULT;
#endif // V8_USE_EXTERNAL_STARTUP_DATA
};
} // namespace gin
#endif // GIN_V8_INITIALIZER_H_
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