blob: 70a77ed5f10e71c78d1bada8f6763a1d293bf0b3 [file] [log] [blame]
/*
* 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 <errno.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 */