replicant-frameworks_native/libs/ui/BufferMapper.cpp

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/*
* Copyright (C) 2007 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 "BufferMapper"
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <utils/Log.h>
#include <ui/BufferMapper.h>
#include <ui/Rect.h>
#include <EGL/android_natives.h>
#include <hardware/gralloc.h>
// ---------------------------------------------------------------------------
// enable mapping debugging
#define DEBUG_MAPPINGS 0
// never remove mappings from the list
#define DEBUG_MAPPINGS_KEEP_ALL 0
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
template<class BufferMapper> Mutex Singleton<BufferMapper>::sLock;
template<> BufferMapper* Singleton<BufferMapper>::sInstance(0);
BufferMapper::BufferMapper()
: mAllocMod(0)
{
hw_module_t const* module;
int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
if (err == 0) {
mAllocMod = (gralloc_module_t const *)module;
}
}
status_t BufferMapper::map(buffer_handle_t handle, void** addr, const void* id)
{
Mutex::Autolock _l(mLock);
status_t err = mAllocMod->map(mAllocMod, handle, addr);
LOGW_IF(err, "map(...) failed %d (%s)", err, strerror(-err));
#if DEBUG_MAPPINGS
if (err == NO_ERROR)
logMapLocked(handle, id);
#endif
return err;
}
status_t BufferMapper::unmap(buffer_handle_t handle, const void* id)
{
Mutex::Autolock _l(mLock);
status_t err = mAllocMod->unmap(mAllocMod, handle);
LOGW_IF(err, "unmap(...) failed %d (%s)", err, strerror(-err));
#if DEBUG_MAPPINGS
if (err == NO_ERROR)
logUnmapLocked(handle, id);
#endif
return err;
}
status_t BufferMapper::lock(buffer_handle_t handle, int usage, const Rect& bounds)
{
status_t err = mAllocMod->lock(mAllocMod, handle, usage,
bounds.left, bounds.top, bounds.width(), bounds.height());
LOGW_IF(err, "unlock(...) failed %d (%s)", err, strerror(-err));
return err;
}
status_t BufferMapper::unlock(buffer_handle_t handle)
{
status_t err = mAllocMod->unlock(mAllocMod, handle);
LOGW_IF(err, "unlock(...) failed %d (%s)", err, strerror(-err));
return err;
}
void BufferMapper::logMapLocked(buffer_handle_t handle, const void* id)
{
CallStack stack;
stack.update(2);
map_info_t info;
info.id = id;
info.stack = stack;
ssize_t index = mMapInfo.indexOfKey(handle);
if (index >= 0) {
Vector<map_info_t>& infos = mMapInfo.editValueAt(index);
infos.add(info);
} else {
Vector<map_info_t> infos;
infos.add(info);
mMapInfo.add(handle, infos);
}
}
void BufferMapper::logUnmapLocked(buffer_handle_t handle, const void* id)
{
ssize_t index = mMapInfo.indexOfKey(handle);
if (index < 0) {
LOGE("unmapping %p which doesn't exist in our map!", handle);
return;
}
Vector<map_info_t>& infos = mMapInfo.editValueAt(index);
ssize_t count = infos.size();
for (int i=0 ; i<count ; ) {
if (infos[i].id == id) {
infos.removeAt(i);
--count;
} else {
++i;
}
}
if (count == 0) {
mMapInfo.removeItemsAt(index, 1);
}
}
void BufferMapper::dump(buffer_handle_t handle)
{
Mutex::Autolock _l(mLock);
ssize_t index = mMapInfo.indexOfKey(handle);
if (index < 0) {
LOGD("handle %p is not mapped through BufferMapper", handle);
return;
}
const Vector<map_info_t>& infos = mMapInfo.valueAt(index);
ssize_t count = infos.size();
for (int i=0 ; i<count ; i++) {
LOGD("#%d", i);
infos[i].stack.dump();
}
}
// ---------------------------------------------------------------------------
}; // namespace android