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Diffstat (limited to 'media/libmediaplayerservice/ActivityManager.cpp')
-rw-r--r-- | media/libmediaplayerservice/ActivityManager.cpp | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/media/libmediaplayerservice/ActivityManager.cpp b/media/libmediaplayerservice/ActivityManager.cpp new file mode 100644 index 0000000..60a209f --- /dev/null +++ b/media/libmediaplayerservice/ActivityManager.cpp @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2006 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 <unistd.h> +#include <binder/IBinder.h> +#include <binder/IServiceManager.h> +#include <binder/Parcel.h> +#include <utils/String8.h> + +#include "ActivityManager.h" + +namespace android { + +const uint32_t OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION + 4; + +// Perform ContentProvider.openFile() on the given URI, returning +// the resulting native file descriptor. Returns < 0 on error. +int openContentProviderFile(const String16& uri) +{ + int fd = -1; + + sp<IServiceManager> sm = defaultServiceManager(); + sp<IBinder> am = sm->getService(String16("activity")); + if (am != NULL) { + Parcel data, reply; + data.writeInterfaceToken(String16("android.app.IActivityManager")); + data.writeString16(uri); + status_t ret = am->transact(OPEN_CONTENT_URI_TRANSACTION, data, &reply); + if (ret == NO_ERROR) { + int32_t exceptionCode = reply.readExceptionCode(); + if (!exceptionCode) { + // Success is indicated here by a nonzero int followed by the fd; + // failure by a zero int with no data following. + if (reply.readInt32() != 0) { + fd = dup(reply.readFileDescriptor()); + } + } else { + // An exception was thrown back; fall through to return failure + ALOGD("openContentUri(%s) caught exception %d\n", + String8(uri).string(), exceptionCode); + } + } + } + + return fd; +} + +} /* namespace android */ |