V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
snapshot-external.cc
1 // Copyright 2006-2008 the V8 project 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.
4 
5 // Used for building with external snapshots.
6 
7 #include "src/snapshot/snapshot.h"
8 
9 #include "src/base/platform/mutex.h"
10 #include "src/snapshot/snapshot-source-sink.h"
11 #include "src/v8.h" // for V8::Initialize
12 
13 
14 #ifndef V8_USE_EXTERNAL_STARTUP_DATA
15 #error snapshot-external.cc is used only for the external snapshot build.
16 #endif // V8_USE_EXTERNAL_STARTUP_DATA
17 
18 
19 namespace v8 {
20 namespace internal {
21 
22 static base::LazyMutex external_startup_data_mutex = LAZY_MUTEX_INITIALIZER;
23 static v8::StartupData external_startup_blob = {nullptr, 0};
24 
25 void SetSnapshotFromFile(StartupData* snapshot_blob) {
26  base::MutexGuard lock_guard(external_startup_data_mutex.Pointer());
27  DCHECK(snapshot_blob);
28  DCHECK(snapshot_blob->data);
29  DCHECK_GT(snapshot_blob->raw_size, 0);
30  DCHECK(!external_startup_blob.data);
31  DCHECK(Snapshot::SnapshotIsValid(snapshot_blob));
32  external_startup_blob = *snapshot_blob;
33 }
34 
35 
36 const v8::StartupData* Snapshot::DefaultSnapshotBlob() {
37  base::MutexGuard lock_guard(external_startup_data_mutex.Pointer());
38  return &external_startup_blob;
39 }
40 } // namespace internal
41 } // namespace v8
Definition: libplatform.h:13