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/*
* Copyright (C) 2020 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 "Utils.h"
#include <hwbinder/HidlSupport.h>
#include <string.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
namespace android::hardware {
void zeroMemory(uint8_t* data, size_t size) {
memset(data, 0, size);
}
static bool isHwServiceManagerInstalled() {
return access("/system_ext/bin/hwservicemanager", F_OK) == 0 ||
access("/system/system_ext/bin/hwservicemanager", F_OK) == 0 ||
access("/system/bin/hwservicemanager", F_OK) == 0;
}
static bool waitForHwServiceManager() {
if (!isHwServiceManagerInstalled()) {
return false;
}
// TODO(b/31559095): need bionic host so that we can use 'prop_info' returned
// from WaitForProperty
#ifdef __ANDROID__
static const char* kHwServicemanagerReadyProperty = "hwservicemanager.ready";
using std::literals::chrono_literals::operator""s;
using android::base::WaitForProperty;
while (true) {
if (base::GetBoolProperty("hwservicemanager.disabled", false)) {
return false;
}
if (WaitForProperty(kHwServicemanagerReadyProperty, "true", 1s)) {
return true;
}
LOG(WARNING) << "Waited for hwservicemanager.ready for a second, waiting another...";
}
#endif // __ANDROID__
return true;
}
bool isHwbinderSupportedBlocking() {
return waitForHwServiceManager();
}
} // namespace android::hardware
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