Adds framework support for hidl-gen Java backend. (to support structs) (29803def) · Commits · e / os / android_frameworks_base

core/java/android/os/HwBlob.java

0 → 100644

+74 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package android.os;

		import libcore.util.NativeAllocationRegistry;

		/** @hide */
		public class HwBlob {
		private static final String TAG = "HwBlob";

		private static final NativeAllocationRegistry sNativeRegistry;

		public HwBlob(int size) {
		native_setup(size);

		sNativeRegistry.registerNativeAllocation(
		this,
		mNativeContext);
		}

		public native final boolean getBool(long offset);
		public native final byte getInt8(long offset);
		public native final short getInt16(long offset);
		public native final int getInt32(long offset);
		public native final long getInt64(long offset);
		public native final float getFloat(long offset);
		public native final double getDouble(long offset);
		public native final String getString(long offset);

		public native final void putBool(long offset, boolean x);
		public native final void putInt8(long offset, byte x);
		public native final void putInt16(long offset, short x);
		public native final void putInt32(long offset, int x);
		public native final void putInt64(long offset, long x);
		public native final void putFloat(long offset, float x);
		public native final void putDouble(long offset, double x);
		public native final void putString(long offset, String x);

		public native final void putBlob(long offset, HwBlob blob);

		public native final long handle();

		// Returns address of the "freeFunction".
		private static native final long native_init();

		private native final void native_setup(int size);

		static {
		long freeFunction = native_init();

		sNativeRegistry = new NativeAllocationRegistry(
		HwBlob.class.getClassLoader(),
		freeFunction,
		128 /* size */);
		}

		private long mNativeContext;
		}

core/java/android/os/HwParcel.java

+8 −0

Original line number	Diff line number	Diff line
		@@ -101,6 +101,14 @@ public class HwParcel {

		public native final IHwBinder readStrongBinder();

		// Handle is stored as part of the blob.
		public native final HwBlob readBuffer();

		public native final HwBlob readEmbeddedBuffer(
		long parentHandle, long offset);

		public native final void writeBuffer(HwBlob blob);

		public native final void writeStatus(int status);
		public native final void verifySuccess();
		public native final void releaseTemporaryStorage();

core/jni/Android.mk

+1 −0

Original line number	Diff line number	Diff line
		@@ -81,6 +81,7 @@ LOCAL_SRC_FILES:= \
		android_text_StaticLayout.cpp \
		android_os_Debug.cpp \
		android_os_HwBinder.cpp \
		android_os_HwBlob.cpp \
		android_os_HwParcel.cpp \
		android_os_HwRemoteBinder.cpp \
		android_os_MemoryFile.cpp \

core/jni/AndroidRuntime.cpp

+2 −0

Original line number	Diff line number	Diff line
		@@ -157,6 +157,7 @@ extern int register_android_database_SQLiteDebug(JNIEnv* env);
		extern int register_android_nio_utils(JNIEnv* env);
		extern int register_android_os_Debug(JNIEnv* env);
		extern int register_android_os_HwBinder(JNIEnv *env);
		extern int register_android_os_HwBlob(JNIEnv *env);
		extern int register_android_os_HwParcel(JNIEnv *env);
		extern int register_android_os_HwRemoteBinder(JNIEnv *env);
		extern int register_android_os_MessageQueue(JNIEnv* env);
		@@ -1291,6 +1292,7 @@ static const RegJNIRec gRegJNI[] = {
		REG_JNI(register_android_os_Binder),
		REG_JNI(register_android_os_Parcel),
		REG_JNI(register_android_os_HwBinder),
		REG_JNI(register_android_os_HwBlob),
		REG_JNI(register_android_os_HwParcel),
		REG_JNI(register_android_os_HwRemoteBinder),
		REG_JNI(register_android_nio_utils),

core/jni/android_os_HwBlob.cpp

0 → 100644

+452 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		//#define LOG_NDEBUG 0
		#define LOG_TAG "android_os_HwBlob"
		#include <android-base/logging.h>

		#include "android_os_HwBlob.h"

		#include "android_os_HwParcel.h"

		#include <JNIHelp.h>
		#include <android_runtime/AndroidRuntime.h>
		#include <hwbinder/Status.h>
		#include <nativehelper/ScopedLocalRef.h>

		#include "core_jni_helpers.h"

		using android::AndroidRuntime;
		using android::hardware::hidl_string;

		#define PACKAGE_PATH "android/os"
		#define CLASS_NAME "HwBlob"
		#define CLASS_PATH PACKAGE_PATH "/" CLASS_NAME

		namespace android {

		static struct fields_t {
		jfieldID contextID;
		jmethodID constructID;

		} gFields;

		// static
		void JHwBlob::InitClass(JNIEnv *env) {
		ScopedLocalRef<jclass> clazz(
		env, FindClassOrDie(env, CLASS_PATH));

		gFields.contextID =
		GetFieldIDOrDie(env, clazz.get(), "mNativeContext", "J");

		gFields.constructID = GetMethodIDOrDie(env, clazz.get(), "<init>", "(I)V");
		}

		// static
		sp<JHwBlob> JHwBlob::SetNativeContext(
		JNIEnv *env, jobject thiz, const sp<JHwBlob> &context) {
		sp<JHwBlob> old = (JHwBlob *)env->GetLongField(thiz, gFields.contextID);

		if (context != NULL) {
		context->incStrong(NULL /* id */);
		}

		if (old != NULL) {
		old->decStrong(NULL /* id */);
		}

		env->SetLongField(thiz, gFields.contextID, (long)context.get());

		return old;
		}

		// static
		sp<JHwBlob> JHwBlob::GetNativeContext(JNIEnv *env, jobject thiz) {
		return (JHwBlob *)env->GetLongField(thiz, gFields.contextID);
		}

		JHwBlob::JHwBlob(JNIEnv *env, jobject thiz, size_t size)
		: mBuffer(nullptr),
		mSize(size),
		mOwnsBuffer(true),
		mHandle(0) {
		jclass clazz = env->GetObjectClass(thiz);
		CHECK(clazz != NULL);

		mClass = (jclass)env->NewGlobalRef(clazz);
		mObject = env->NewWeakGlobalRef(thiz);

		if (size > 0) {
		mBuffer = malloc(size);
		}
		}

		JHwBlob::~JHwBlob() {
		if (mOwnsBuffer) {
		free(mBuffer);
		mBuffer = nullptr;
		}

		JNIEnv *env = AndroidRuntime::getJNIEnv();

		env->DeleteWeakGlobalRef(mObject);
		mObject = NULL;

		env->DeleteGlobalRef(mClass);
		mClass = NULL;
		}

		void JHwBlob::setTo(const void *ptr, size_t handle) {
		CHECK_EQ(mSize, 0u);
		CHECK(mBuffer == nullptr);

		mBuffer = const_cast<void *>(ptr);
		mSize = SIZE_MAX; // XXX
		mOwnsBuffer = false;
		mHandle = handle;
		}

		status_t JHwBlob::getHandle(size_t *handle) const {
		if (mOwnsBuffer) {
		return INVALID_OPERATION;
		}

		*handle = mHandle;

		return OK;
		}

		status_t JHwBlob::read(size_t offset, void *data, size_t size) const {
		if (offset + size > mSize) {
		return -ERANGE;
		}

		memcpy(data, (const uint8_t *)mBuffer + offset, size);

		return OK;
		}

		status_t JHwBlob::write(size_t offset, const void *data, size_t size) {
		if (offset + size > mSize) {
		return -ERANGE;
		}

		memcpy((uint8_t *)mBuffer + offset, data, size);

		return OK;
		}

		status_t JHwBlob::getString(size_t offset, const hidl_string **s) const {
		if ((offset + sizeof(hidl_string)) > mSize) {
		return -ERANGE;
		}

		s = reinterpret_cast<const hidl_string >(
		(const uint8_t *)mBuffer + offset);

		return OK;
		}

		const void *JHwBlob::data() const {
		return mBuffer;
		}

		size_t JHwBlob::size() const {
		return mSize;
		}

		status_t JHwBlob::putBlob(size_t offset, const sp<JHwBlob> &blob) {
		size_t index = mSubBlobs.add();
		BlobInfo *info = &mSubBlobs.editItemAt(index);

		info->mOffset = offset;
		info->mBlob = blob;

		const void *data = blob->data();

		return write(offset, &data, sizeof(data));
		}

		status_t JHwBlob::writeToParcel(hardware::Parcel *parcel) const {
		size_t handle;
		status_t err = parcel->writeBuffer(data(), size(), &handle);

		if (err != OK) {
		return err;
		}

		for (size_t i = 0; i < mSubBlobs.size(); ++i) {
		const BlobInfo &info = mSubBlobs[i];

		err = info.mBlob->writeEmbeddedToParcel(parcel, handle, info.mOffset);

		if (err != OK) {
		return err;
		}
		}

		return OK;
		}

		status_t JHwBlob::writeEmbeddedToParcel(
		hardware::Parcel *parcel,
		size_t parentHandle,
		size_t parentOffset) const {
		size_t handle;
		status_t err = parcel->writeEmbeddedBuffer(
		data(), size(), &handle, parentHandle, parentOffset);

		if (err != OK) {
		return err;
		}

		for (size_t i = 0; i < mSubBlobs.size(); ++i) {
		const BlobInfo &info = mSubBlobs[i];

		err = info.mBlob->writeEmbeddedToParcel(parcel, handle, info.mOffset);

		if (err != OK) {
		return err;
		}
		}

		return OK;
		}

		// static
		jobject JHwBlob::NewObject(JNIEnv env, const void ptr, size_t handle) {
		jobject obj = JHwBlob::NewObject(env, 0 /* size */);
		JHwBlob::GetNativeContext(env, obj)->setTo(ptr, handle);

		return obj;
		}

		// static
		jobject JHwBlob::NewObject(JNIEnv *env, size_t size) {
		ScopedLocalRef<jclass> clazz(env, FindClassOrDie(env, CLASS_PATH));

		jmethodID constructID =
		GetMethodIDOrDie(env, clazz.get(), "<init>", "(I)V");

		// XXX Again cannot refer to gFields.constructID because InitClass may
		// not have been called yet.

		return env->NewObject(clazz.get(), constructID, size);
		}

		} // namespace android

		////////////////////////////////////////////////////////////////////////////////

		using namespace android;

		static void releaseNativeContext(void *nativeContext) {
		sp<JHwBlob> parcel = (JHwBlob *)nativeContext;

		if (parcel != NULL) {
		parcel->decStrong(NULL /* id */);
		}
		}

		static jlong JHwBlob_native_init(JNIEnv *env) {
		JHwBlob::InitClass(env);

		return reinterpret_cast<jlong>(&releaseNativeContext);
		}

		static void JHwBlob_native_setup(
		JNIEnv *env, jobject thiz, jint size) {
		sp<JHwBlob> context = new JHwBlob(env, thiz, size);

		JHwBlob::SetNativeContext(env, thiz, context);
		}

		#define DEFINE_BLOB_GETTER(Suffix,Type) \
		static Type JHwBlob_native_get ## Suffix( \
		JNIEnv *env, jobject thiz, jlong offset) { \
		sp<JHwBlob> blob = JHwBlob::GetNativeContext(env, thiz); \
		\
		Type x; \
		status_t err = blob->read(offset, &x, sizeof(x)); \
		\
		if (err != OK) { \
		signalExceptionForError(env, err); \
		return 0; \
		} \
		\
		return x; \
		}

		DEFINE_BLOB_GETTER(Int8,jbyte)
		DEFINE_BLOB_GETTER(Int16,jshort)
		DEFINE_BLOB_GETTER(Int32,jint)
		DEFINE_BLOB_GETTER(Int64,jlong)
		DEFINE_BLOB_GETTER(Float,jfloat)
		DEFINE_BLOB_GETTER(Double,jdouble)

		static jboolean JHwBlob_native_getBool(
		JNIEnv *env, jobject thiz, jlong offset) {
		sp<JHwBlob> blob = JHwBlob::GetNativeContext(env, thiz);

		bool x;
		status_t err = blob->read(offset, &x, sizeof(x));

		if (err != OK) {
		signalExceptionForError(env, err);
		return 0;
		}

		return (jboolean)x;
		}

		static jstring JHwBlob_native_getString(
		JNIEnv *env, jobject thiz, jlong offset) {
		sp<JHwBlob> blob = JHwBlob::GetNativeContext(env, thiz);

		const hidl_string *s;
		status_t err = blob->getString(offset, &s);

		if (err != OK) {
		signalExceptionForError(env, err);
		return nullptr;
		}

		return env->NewStringUTF(s->c_str());
		}

		#define DEFINE_BLOB_PUTTER(Suffix,Type) \
		static void JHwBlob_native_put ## Suffix( \
		JNIEnv *env, jobject thiz, jlong offset, Type x) { \
		\
		sp<JHwBlob> blob = JHwBlob::GetNativeContext(env, thiz); \
		\
		status_t err = blob->write(offset, &x, sizeof(x)); \
		\
		if (err != OK) { \
		signalExceptionForError(env, err); \
		} \
		}

		DEFINE_BLOB_PUTTER(Int8,jbyte)
		DEFINE_BLOB_PUTTER(Int16,jshort)
		DEFINE_BLOB_PUTTER(Int32,jint)
		DEFINE_BLOB_PUTTER(Int64,jlong)
		DEFINE_BLOB_PUTTER(Float,jfloat)
		DEFINE_BLOB_PUTTER(Double,jdouble)

		static void JHwBlob_native_putBool(
		JNIEnv *env, jobject thiz, jlong offset, jboolean x) {

		sp<JHwBlob> blob = JHwBlob::GetNativeContext(env, thiz);

		bool b = (bool)x;
		status_t err = blob->write(offset, &b, sizeof(b));

		if (err != OK) {
		signalExceptionForError(env, err);
		}
		}

		static void JHwBlob_native_putString(
		JNIEnv *env, jobject thiz, jlong offset, jstring stringObj) {
		if (stringObj == nullptr) {
		jniThrowException(env, "java/lang/NullPointerException", nullptr);
		return;
		}

		const char *s = env->GetStringUTFChars(stringObj, nullptr);

		if (s == nullptr) {
		return;
		}

		size_t size = strlen(s) + 1;
		ScopedLocalRef<jobject> subBlobObj(env, JHwBlob::NewObject(env, size));
		sp<JHwBlob> subBlob = JHwBlob::GetNativeContext(env, subBlobObj.get());
		subBlob->write(0 /* offset */, s, size);

		env->ReleaseStringUTFChars(stringObj, s);
		s = nullptr;

		hidl_string tmp;
		tmp.setToExternal(static_cast<const char *>(subBlob->data()), size);

		sp<JHwBlob> blob = JHwBlob::GetNativeContext(env, thiz);
		blob->write(offset, &tmp, sizeof(tmp));
		blob->putBlob(offset + hidl_string::kOffsetOfBuffer, subBlob);
		}

		static void JHwBlob_native_putBlob(
		JNIEnv *env, jobject thiz, jlong offset, jobject blobObj) {
		if (blobObj == nullptr) {
		jniThrowException(env, "java/lang/NullPointerException", nullptr);
		return;
		}

		sp<JHwBlob> blob = JHwBlob::GetNativeContext(env, thiz);
		sp<JHwBlob> subBlob = JHwBlob::GetNativeContext(env, blobObj);

		blob->putBlob(offset, subBlob);
		}

		static jlong JHwBlob_native_handle(JNIEnv *env, jobject thiz) {
		size_t handle;
		status_t err = JHwBlob::GetNativeContext(env, thiz)->getHandle(&handle);

		if (err != OK) {
		signalExceptionForError(env, err);
		return 0;
		}

		return handle;
		}

		static JNINativeMethod gMethods[] = {
		{ "native_init", "()J", (void *)JHwBlob_native_init },
		{ "native_setup", "(I)V", (void *)JHwBlob_native_setup },

		{ "getBool", "(J)Z", (void *)JHwBlob_native_getBool },
		{ "getInt8", "(J)B", (void *)JHwBlob_native_getInt8 },
		{ "getInt16", "(J)S", (void *)JHwBlob_native_getInt16 },
		{ "getInt32", "(J)I", (void *)JHwBlob_native_getInt32 },
		{ "getInt64", "(J)J", (void *)JHwBlob_native_getInt64 },
		{ "getFloat", "(J)F", (void *)JHwBlob_native_getFloat },
		{ "getDouble", "(J)D", (void *)JHwBlob_native_getDouble },
		{ "getString", "(J)Ljava/lang/String;", (void *)JHwBlob_native_getString },

		{ "putBool", "(JZ)V", (void *)JHwBlob_native_putBool },
		{ "putInt8", "(JB)V", (void *)JHwBlob_native_putInt8 },
		{ "putInt16", "(JS)V", (void *)JHwBlob_native_putInt16 },
		{ "putInt32", "(JI)V", (void *)JHwBlob_native_putInt32 },
		{ "putInt64", "(JJ)V", (void *)JHwBlob_native_putInt64 },
		{ "putFloat", "(JF)V", (void *)JHwBlob_native_putFloat },
		{ "putDouble", "(JD)V", (void *)JHwBlob_native_putDouble },
		{ "putString", "(JLjava/lang/String;)V", (void *)JHwBlob_native_putString },

		{ "putBlob", "(JL" PACKAGE_PATH "/HwBlob;)V",
		(void *)JHwBlob_native_putBlob },

		{ "handle", "()J", (void *)JHwBlob_native_handle },
		};

		namespace android {

		int register_android_os_HwBlob(JNIEnv *env) {
		return RegisterMethodsOrDie(env, CLASS_PATH, gMethods, NELEM(gMethods));
		}

		} // namespace android