blob: d14887f11c57dc8e361bef80908996a3b413e7ea [file] [log] [blame]
/*
* 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_TAG "HidlSupport"
#include <hidl/HidlBinderSupport.h>
// C includes
#include <unistd.h>
// C++ includes
#include <fstream>
#include <sstream>
namespace android {
namespace hardware {
hidl_binder_death_recipient::hidl_binder_death_recipient(const sp<hidl_death_recipient> &recipient,
uint64_t cookie, const sp<::android::hidl::base::V1_0::IBase> &base) :
mRecipient(recipient), mCookie(cookie), mBase(base) {
}
void hidl_binder_death_recipient::binderDied(const wp<IBinder>& /*who*/) {
sp<hidl_death_recipient> recipient = mRecipient.promote();
if (recipient != nullptr && mBase != nullptr) {
recipient->serviceDied(mCookie, mBase);
}
mBase = nullptr;
}
wp<hidl_death_recipient> hidl_binder_death_recipient::getRecipient() {
return mRecipient;
}
const size_t hidl_memory::kOffsetOfHandle = offsetof(hidl_memory, mHandle);
const size_t hidl_memory::kOffsetOfName = offsetof(hidl_memory, mName);
static_assert(hidl_memory::kOffsetOfHandle == 0, "wrong offset");
static_assert(hidl_memory::kOffsetOfName == 24, "wrong offset");
status_t readEmbeddedFromParcel(const hidl_memory& memory,
const Parcel &parcel, size_t parentHandle, size_t parentOffset) {
const native_handle_t *handle;
::android::status_t _hidl_err = parcel.readNullableEmbeddedNativeHandle(
parentHandle,
parentOffset + hidl_memory::kOffsetOfHandle,
&handle);
if (_hidl_err == ::android::OK) {
_hidl_err = readEmbeddedFromParcel(
memory.name(),
parcel,
parentHandle,
parentOffset + hidl_memory::kOffsetOfName);
}
return _hidl_err;
}
status_t writeEmbeddedToParcel(const hidl_memory &memory,
Parcel *parcel, size_t parentHandle, size_t parentOffset) {
status_t _hidl_err = parcel->writeEmbeddedNativeHandle(
memory.handle(),
parentHandle,
parentOffset + hidl_memory::kOffsetOfHandle);
if (_hidl_err == ::android::OK) {
_hidl_err = writeEmbeddedToParcel(
memory.name(),
parcel,
parentHandle,
parentOffset + hidl_memory::kOffsetOfName);
}
return _hidl_err;
}
const size_t hidl_string::kOffsetOfBuffer = offsetof(hidl_string, mBuffer);
static_assert(hidl_string::kOffsetOfBuffer == 0, "wrong offset");
status_t readEmbeddedFromParcel(const hidl_string &string ,
const Parcel &parcel, size_t parentHandle, size_t parentOffset) {
const void *out;
status_t status = parcel.readEmbeddedBuffer(
string.size() + 1,
nullptr /* buffer_handle */,
parentHandle,
parentOffset + hidl_string::kOffsetOfBuffer,
&out);
if (status != OK) {
return status;
}
// Always safe to access out[string.size()] because we read size+1 bytes
if (static_cast<const char *>(out)[string.size()] != '\0') {
ALOGE("Received unterminated hidl_string buffer.");
return BAD_VALUE;
}
return OK;
}
status_t writeEmbeddedToParcel(const hidl_string &string,
Parcel *parcel, size_t parentHandle, size_t parentOffset) {
return parcel->writeEmbeddedBuffer(
string.c_str(),
string.size() + 1,
nullptr /* handle */,
parentHandle,
parentOffset + hidl_string::kOffsetOfBuffer);
}
android::status_t writeToParcel(const hidl_version &version, android::hardware::Parcel& parcel) {
return parcel.writeUint32(static_cast<uint32_t>(version.get_major()) << 16 | version.get_minor());
}
hidl_version* readFromParcel(const android::hardware::Parcel& parcel) {
uint32_t version;
android::status_t status = parcel.readUint32(&version);
if (status != OK) {
return nullptr;
} else {
return new hidl_version(version >> 16, version & 0xFFFF);
}
}
status_t readFromParcel(Status *s, const Parcel& parcel) {
int32_t exception;
status_t status = parcel.readInt32(&exception);
if (status != OK) {
s->setFromStatusT(status);
return status;
}
// Skip over fat response headers. Not used (or propagated) in native code.
if (exception == Status::EX_HAS_REPLY_HEADER) {
// Note that the header size includes the 4 byte size field.
const int32_t header_start = parcel.dataPosition();
int32_t header_size;
status = parcel.readInt32(&header_size);
if (status != OK) {
s->setFromStatusT(status);
return status;
}
parcel.setDataPosition(header_start + header_size);
// And fat response headers are currently only used when there are no
// exceptions, so act like there was no error.
exception = Status::EX_NONE;
}
if (exception == Status::EX_NONE) {
*s = Status::ok();
return status;
}
// The remote threw an exception. Get the message back.
String16 message;
status = parcel.readString16(&message);
if (status != OK) {
s->setFromStatusT(status);
return status;
}
s->setException(exception, String8(message));
return status;
}
status_t writeToParcel(const Status &s, Parcel* parcel) {
// Something really bad has happened, and we're not going to even
// try returning rich error data.
if (s.exceptionCode() == Status::EX_TRANSACTION_FAILED) {
return s.transactionError();
}
status_t status = parcel->writeInt32(s.exceptionCode());
if (status != OK) { return status; }
if (s.exceptionCode() == Status::EX_NONE) {
// We have no more information to write.
return status;
}
status = parcel->writeString16(String16(s.exceptionMessage()));
return status;
}
void configureBinderRpcThreadpool(size_t maxThreads, bool callerWillJoin) {
ProcessState::self()->setThreadPoolConfiguration(maxThreads, callerWillJoin /*callerJoinsPool*/);
}
void joinBinderRpcThreadpool() {
IPCThreadState::self()->joinThreadPool();
}
int setupBinderPolling() {
int fd;
int err = IPCThreadState::self()->setupPolling(&fd);
if (err != OK) {
ALOGE("Failed to setup binder polling: %d (%s)", err, strerror(err));
}
return err == OK ? fd : -1;
}
status_t handleBinderPoll() {
return IPCThreadState::self()->handlePolledCommands();
}
} // namespace hardware
} // namespace android