src/content/app/android/child_process_service.cc

   1 // Copyright (c) 2012 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.
   4
   5 #include "content/app/android/child_process_service.h"
   6
   7 #include <android/native_window_jni.h>
   8 #include <cpu-features.h>
   9
  10 #include "base/android/jni_array.h"
  11 #include "base/android/memory_pressure_listener_android.h"
  12 #include "base/logging.h"
  13 #include "base/posix/global_descriptors.h"
  14 #include "content/child/child_thread.h"
  15 #include "content/common/android/surface_texture_peer.h"
  16 #include "content/common/gpu/gpu_surface_lookup.h"
  17 #include "content/public/app/android_library_loader_hooks.h"
  18 #include "content/public/common/content_descriptors.h"
  19 #include "ipc/ipc_descriptors.h"
  20 #include "jni/ChildProcessService_jni.h"
  21 #include "ui/gl/android/scoped_java_surface.h"
  22
  23 using base::android::AttachCurrentThread;
  24 using base::android::CheckException;
  25 using base::android::JavaIntArrayToIntVector;
  26
  27 namespace content {
  28
  29 namespace {
  30
  31 class SurfaceTexturePeerChildImpl : public content::SurfaceTexturePeer,
  32                                     public content::GpuSurfaceLookup {
  33  public:
  34   // |service| is the instance of
  35   // org.chromium.content.app.ChildProcessService.
  36   explicit SurfaceTexturePeerChildImpl(
  37       const base::android::ScopedJavaLocalRef<jobject>& service)
  38       : service_(service) {
  39     GpuSurfaceLookup::InitInstance(this);
  40   }
  41
  42   virtual ~SurfaceTexturePeerChildImpl() {
  43     GpuSurfaceLookup::InitInstance(NULL);
  44   }
  45
  46   virtual void EstablishSurfaceTexturePeer(
  47       base::ProcessHandle pid,
  48       scoped_refptr<gfx::SurfaceTexture> surface_texture,
  49       int primary_id,
  50       int secondary_id) OVERRIDE {
  51     JNIEnv* env = base::android::AttachCurrentThread();
  52     content::Java_ChildProcessService_establishSurfaceTexturePeer(
  53         env, service_.obj(), pid,
  54         surface_texture->j_surface_texture().obj(), primary_id,
  55         secondary_id);
  56     CheckException(env);
  57   }
  58
  59   virtual gfx::AcceleratedWidget AcquireNativeWidget(int surface_id) OVERRIDE {
  60     JNIEnv* env = base::android::AttachCurrentThread();
  61     gfx::ScopedJavaSurface surface(
  62         content::Java_ChildProcessService_getViewSurface(
  63         env, service_.obj(), surface_id));
  64
  65     if (surface.j_surface().is_null())
  66       return NULL;
  67
  68     ANativeWindow* native_window = ANativeWindow_fromSurface(
  69         env, surface.j_surface().obj());
  70
  71     return native_window;
  72   }
  73
  74  private:
  75   // The instance of org.chromium.content.app.ChildProcessService.
  76   base::android::ScopedJavaGlobalRef<jobject> service_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(SurfaceTexturePeerChildImpl);
  79 };
  80
  81 // Chrome actually uses the renderer code path for all of its child
  82 // processes such as renderers, plugins, etc.
  83 void InternalInitChildProcess(const std::vector<int>& file_ids,
  84                               const std::vector<int>& file_fds,
  85                               JNIEnv* env,
  86                               jclass clazz,
  87                               jobject context,
  88                               jobject service_in,
  89                               jint cpu_count,
  90                               jlong cpu_features) {
  91   base::android::ScopedJavaLocalRef<jobject> service(env, service_in);
  92
  93   // Set the CPU properties.
  94   android_setCpu(cpu_count, cpu_features);
  95   // Register the file descriptors.
  96   // This includes the IPC channel, the crash dump signals and resource related
  97   // files.
  98   DCHECK(file_fds.size() == file_ids.size());
  99   for (size_t i = 0; i < file_ids.size(); ++i)
 100     base::GlobalDescriptors::GetInstance()->Set(file_ids[i], file_fds[i]);
 101
 102   content::SurfaceTexturePeer::InitInstance(
 103       new SurfaceTexturePeerChildImpl(service));
 104
 105   base::android::MemoryPressureListenerAndroid::RegisterSystemCallback(env);
 106 }
 107
 108 }  // namespace <anonymous>
 109
 110 void InitChildProcess(JNIEnv* env,
 111                       jclass clazz,
 112                       jobject context,
 113                       jobject service,
 114                       jintArray j_file_ids,
 115                       jintArray j_file_fds,
 116                       jint cpu_count,
 117                       jlong cpu_features) {
 118   std::vector<int> file_ids;
 119   std::vector<int> file_fds;
 120   JavaIntArrayToIntVector(env, j_file_ids, &file_ids);
 121   JavaIntArrayToIntVector(env, j_file_fds, &file_fds);
 122
 123   InternalInitChildProcess(
 124       file_ids, file_fds, env, clazz, context, service,
 125       cpu_count, cpu_features);
 126 }
 127
 128 void ExitChildProcess(JNIEnv* env, jclass clazz) {
 129   LOG(INFO) << "ChildProcessService: Exiting child process.";
 130   LibraryLoaderExitHook();
 131   _exit(0);
 132 }
 133
 134 bool RegisterChildProcessService(JNIEnv* env) {
 135   return RegisterNativesImpl(env);
 136 }
 137
 138 void ShutdownMainThread(JNIEnv* env, jobject obj) {
 139   ChildThread::ShutdownThread();
 140 }
 141
 142 }  // namespace content