upload android base code part1

android/frameworks/native/libs/binder/Binder.cpp

@@ -0,0 +1,313 @@
+/*
+ * Copyright (C) 2005 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.
+ */
+
+#include <binder/Binder.h>
+
+#include <atomic>
+#include <utils/misc.h>
+#include <binder/BpBinder.h>
+#include <binder/IInterface.h>
+#include <binder/IResultReceiver.h>
+#include <binder/IShellCallback.h>
+#include <binder/Parcel.h>
+
+#include <stdio.h>
+
+namespace android {
+
+// ---------------------------------------------------------------------------
+
+IBinder::IBinder()
+    : RefBase()
+{
+}
+
+IBinder::~IBinder()
+{
+}
+
+// ---------------------------------------------------------------------------
+
+sp<IInterface>  IBinder::queryLocalInterface(const String16& /*descriptor*/)
+{
+    return NULL;
+}
+
+BBinder* IBinder::localBinder()
+{
+    return NULL;
+}
+
+BpBinder* IBinder::remoteBinder()
+{
+    return NULL;
+}
+
+bool IBinder::checkSubclass(const void* /*subclassID*/) const
+{
+    return false;
+}
+
+
+status_t IBinder::shellCommand(const sp<IBinder>& target, int in, int out, int err,
+    Vector<String16>& args, const sp<IShellCallback>& callback,
+    const sp<IResultReceiver>& resultReceiver)
+{
+    Parcel send;
+    Parcel reply;
+    send.writeFileDescriptor(in);
+    send.writeFileDescriptor(out);
+    send.writeFileDescriptor(err);
+    const size_t numArgs = args.size();
+    send.writeInt32(numArgs);
+    for (size_t i = 0; i < numArgs; i++) {
+        send.writeString16(args[i]);
+    }
+    send.writeStrongBinder(callback != NULL ? IInterface::asBinder(callback) : NULL);
+    send.writeStrongBinder(resultReceiver != NULL ? IInterface::asBinder(resultReceiver) : NULL);
+    return target->transact(SHELL_COMMAND_TRANSACTION, send, &reply);
+}
+
+// ---------------------------------------------------------------------------
+
+class BBinder::Extras
+{
+public:
+    Mutex mLock;
+    BpBinder::ObjectManager mObjects;
+};
+
+// ---------------------------------------------------------------------------
+
+BBinder::BBinder() : mExtras(nullptr)
+{
+}
+
+bool BBinder::isBinderAlive() const
+{
+    return true;
+}
+
+status_t BBinder::pingBinder()
+{
+    return NO_ERROR;
+}
+
+const String16& BBinder::getInterfaceDescriptor() const
+{
+    // This is a local static rather than a global static,
+    // to avoid static initializer ordering issues.
+    static String16 sEmptyDescriptor;
+    ALOGW("reached BBinder::getInterfaceDescriptor (this=%p)", this);
+    return sEmptyDescriptor;
+}
+
+status_t BBinder::transact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    data.setDataPosition(0);
+
+    status_t err = NO_ERROR;
+    switch (code) {
+        case PING_TRANSACTION:
+            reply->writeInt32(pingBinder());
+            break;
+        default:
+            err = onTransact(code, data, reply, flags);
+            break;
+    }
+
+    if (reply != NULL) {
+        reply->setDataPosition(0);
+    }
+
+    return err;
+}
+
+status_t BBinder::linkToDeath(
+    const sp<DeathRecipient>& /*recipient*/, void* /*cookie*/,
+    uint32_t /*flags*/)
+{
+    return INVALID_OPERATION;
+}
+
+status_t BBinder::unlinkToDeath(
+    const wp<DeathRecipient>& /*recipient*/, void* /*cookie*/,
+    uint32_t /*flags*/, wp<DeathRecipient>* /*outRecipient*/)
+{
+    return INVALID_OPERATION;
+}
+
+status_t BBinder::dump(int /*fd*/, const Vector<String16>& /*args*/)
+{
+    return NO_ERROR;
+}
+
+void BBinder::attachObject(
+    const void* objectID, void* object, void* cleanupCookie,
+    object_cleanup_func func)
+{
+    Extras* e = mExtras.load(std::memory_order_acquire);
+
+    if (!e) {
+        e = new Extras;
+        Extras* expected = nullptr;
+        if (!mExtras.compare_exchange_strong(expected, e,
+                                             std::memory_order_release,
+                                             std::memory_order_acquire)) {
+            delete e;
+            e = expected;  // Filled in by CAS
+        }
+        if (e == 0) return; // out of memory
+    }
+
+    AutoMutex _l(e->mLock);
+    e->mObjects.attach(objectID, object, cleanupCookie, func);
+}
+
+void* BBinder::findObject(const void* objectID) const
+{
+    Extras* e = mExtras.load(std::memory_order_acquire);
+    if (!e) return NULL;
+
+    AutoMutex _l(e->mLock);
+    return e->mObjects.find(objectID);
+}
+
+void BBinder::detachObject(const void* objectID)
+{
+    Extras* e = mExtras.load(std::memory_order_acquire);
+    if (!e) return;
+
+    AutoMutex _l(e->mLock);
+    e->mObjects.detach(objectID);
+}
+
+BBinder* BBinder::localBinder()
+{
+    return this;
+}
+
+BBinder::~BBinder()
+{
+    Extras* e = mExtras.load(std::memory_order_relaxed);
+    if (e) delete e;
+}
+
+
+status_t BBinder::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t /*flags*/)
+{
+    switch (code) {
+        case INTERFACE_TRANSACTION:
+            reply->writeString16(getInterfaceDescriptor());
+            return NO_ERROR;
+
+        case DUMP_TRANSACTION: {
+            int fd = data.readFileDescriptor();
+            int argc = data.readInt32();
+            Vector<String16> args;
+            for (int i = 0; i < argc && data.dataAvail() > 0; i++) {
+               args.add(data.readString16());
+            }
+            return dump(fd, args);
+        }
+
+        case SHELL_COMMAND_TRANSACTION: {
+            int in = data.readFileDescriptor();
+            int out = data.readFileDescriptor();
+            int err = data.readFileDescriptor();
+            int argc = data.readInt32();
+            Vector<String16> args;
+            for (int i = 0; i < argc && data.dataAvail() > 0; i++) {
+               args.add(data.readString16());
+            }
+            sp<IShellCallback> shellCallback = IShellCallback::asInterface(
+                    data.readStrongBinder());
+            sp<IResultReceiver> resultReceiver = IResultReceiver::asInterface(
+                    data.readStrongBinder());
+
+            // XXX can't add virtuals until binaries are updated.
+            //return shellCommand(in, out, err, args, resultReceiver);
+            (void)in;
+            (void)out;
+            (void)err;
+
+            if (resultReceiver != NULL) {
+                resultReceiver->send(INVALID_OPERATION);
+            }
+        }
+
+        case SYSPROPS_TRANSACTION: {
+            report_sysprop_change();
+            return NO_ERROR;
+        }
+
+        default:
+            return UNKNOWN_TRANSACTION;
+    }
+}
+
+// ---------------------------------------------------------------------------
+
+enum {
+    // This is used to transfer ownership of the remote binder from
+    // the BpRefBase object holding it (when it is constructed), to the
+    // owner of the BpRefBase object when it first acquires that BpRefBase.
+    kRemoteAcquired = 0x00000001
+};
+
+BpRefBase::BpRefBase(const sp<IBinder>& o)
+    : mRemote(o.get()), mRefs(NULL), mState(0)
+{
+    extendObjectLifetime(OBJECT_LIFETIME_WEAK);
+
+    if (mRemote) {
+        mRemote->incStrong(this);           // Removed on first IncStrong().
+        mRefs = mRemote->createWeak(this);  // Held for our entire lifetime.
+    }
+}
+
+BpRefBase::~BpRefBase()
+{
+    if (mRemote) {
+        if (!(mState.load(std::memory_order_relaxed)&kRemoteAcquired)) {
+            mRemote->decStrong(this);
+        }
+        mRefs->decWeak(this);
+    }
+}
+
+void BpRefBase::onFirstRef()
+{
+    mState.fetch_or(kRemoteAcquired, std::memory_order_relaxed);
+}
+
+void BpRefBase::onLastStrongRef(const void* /*id*/)
+{
+    if (mRemote) {
+        mRemote->decStrong(this);
+    }
+}
+
+bool BpRefBase::onIncStrongAttempted(uint32_t /*flags*/, const void* /*id*/)
+{
+    return mRemote ? mRefs->attemptIncStrong(this) : false;
+}
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android