78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
|
|
* Copyright (C) 2017 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 "ProfileDataContainer.h"
|
|
|
|
#include <log/log.h>
|
|
#include <cutils/ashmem.h>
|
|
|
|
#include <sys/mman.h>
|
|
|
|
namespace android {
|
|
namespace uirenderer {
|
|
|
|
void ProfileDataContainer::freeData() {
|
|
if (mIsMapped) {
|
|
munmap(mData, sizeof(ProfileData));
|
|
} else {
|
|
delete mData;
|
|
}
|
|
mIsMapped = false;
|
|
mData = nullptr;
|
|
}
|
|
|
|
void ProfileDataContainer::rotateStorage() {
|
|
// If we are mapped we want to stop using the ashmem backend and switch to malloc
|
|
// We are expecting a switchStorageToAshmem call to follow this, but it's not guaranteed
|
|
// If we aren't sitting on top of ashmem then just do a reset() as it's functionally
|
|
// equivalent do a free, malloc, reset.
|
|
if (mIsMapped) {
|
|
freeData();
|
|
mData = new ProfileData;
|
|
}
|
|
mData->reset();
|
|
}
|
|
|
|
void ProfileDataContainer::switchStorageToAshmem(int ashmemfd) {
|
|
int regionSize = ashmem_get_size_region(ashmemfd);
|
|
if (regionSize < 0) {
|
|
int err = errno;
|
|
ALOGW("Failed to get ashmem region size from fd %d, err %d %s", ashmemfd, err, strerror(err));
|
|
return;
|
|
}
|
|
if (regionSize < static_cast<int>(sizeof(ProfileData))) {
|
|
ALOGW("Ashmem region is too small! Received %d, required %u",
|
|
regionSize, static_cast<unsigned int>(sizeof(ProfileData)));
|
|
return;
|
|
}
|
|
ProfileData* newData = reinterpret_cast<ProfileData*>(
|
|
mmap(NULL, sizeof(ProfileData), PROT_READ | PROT_WRITE,
|
|
MAP_SHARED, ashmemfd, 0));
|
|
if (newData == MAP_FAILED) {
|
|
int err = errno;
|
|
ALOGW("Failed to move profile data to ashmem fd %d, error = %d",
|
|
ashmemfd, err);
|
|
return;
|
|
}
|
|
|
|
newData->mergeWith(*mData);
|
|
freeData();
|
|
mData = newData;
|
|
mIsMapped = true;
|
|
}
|
|
|
|
} /* namespace uirenderer */
|
|
} /* namespace android */ |