replicant-frameworks_native/libs/ui/BufferMapper.cpp
2009-04-10 20:34:46 -07:00

162 lines
4.4 KiB
C++

/*
* 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 1
// never remove mappings from the list
#define DEBUG_MAPPINGS_KEEP_ALL 1
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
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)
{
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);
#endif
return err;
}
status_t BufferMapper::unmap(buffer_handle_t handle)
{
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);
#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)
{
CallStack stack;
stack.update(2);
map_info_t info;
ssize_t index = mMapInfo.indexOfKey(handle);
if (index >= 0) {
info = mMapInfo.valueAt(index);
}
ssize_t stackIndex = info.callstacks.indexOfKey(stack);
if (stackIndex >= 0) {
info.callstacks.editValueAt(stackIndex) += 1;
} else {
info.callstacks.add(stack, 1);
}
if (index < 0) {
info.count = 1;
mMapInfo.add(handle, info);
} else {
info.count++;
mMapInfo.replaceValueAt(index, info);
}
}
void BufferMapper::logUnmapLocked(buffer_handle_t handle)
{
ssize_t index = mMapInfo.indexOfKey(handle);
if (index < 0) {
LOGE("unmapping %p which doesn't exist!", handle);
return;
}
map_info_t& info = mMapInfo.editValueAt(index);
info.count--;
if (info.count == 0) {
#if DEBUG_MAPPINGS_KEEP_ALL
info.callstacks.clear();
#else
mMapInfo.removeItemsAt(index, 1);
#endif
}
}
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 map_info_t& info = mMapInfo.valueAt(index);
LOGD("dumping buffer_handle_t %p mappings (count=%d)", handle, info.count);
for (size_t i=0 ; i<info.callstacks.size() ; i++) {
LOGD("#%d, count=%d", i, info.callstacks.valueAt(i));
info.callstacks.keyAt(i).dump();
}
}
// ---------------------------------------------------------------------------
}; // namespace android