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