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/* libs/pixelflinger/codeflinger/CodeCache.cpp
**
** Copyright 2006, 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 <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <cutils/log.h>
#include <cutils/atomic.h>
#include "codeflinger/CodeCache.h"
namespace android {
// ----------------------------------------------------------------------------
#if defined(__arm__)
#include <unistd.h>
#include <errno.h>
#endif
// ----------------------------------------------------------------------------
Assembly::Assembly(size_t size)
: mCount(1), mSize(0)
{
mBase = (uint32_t*)malloc(size);
if (mBase) {
mSize = size;
}
}
Assembly::~Assembly()
{
free(mBase);
}
void Assembly::incStrong(const void*) const
{
android_atomic_inc(&mCount);
}
void Assembly::decStrong(const void*) const
{
if (android_atomic_dec(&mCount) == 1) {
delete this;
}
}
ssize_t Assembly::size() const
{
if (!mBase) return NO_MEMORY;
return mSize;
}
uint32_t* Assembly::base() const
{
return mBase;
}
ssize_t Assembly::resize(size_t newSize)
{
mBase = (uint32_t*)realloc(mBase, newSize);
mSize = newSize;
return size();
}
// ----------------------------------------------------------------------------
CodeCache::CodeCache(size_t size)
: mCacheSize(size), mCacheInUse(0)
{
pthread_mutex_init(&mLock, 0);
}
CodeCache::~CodeCache()
{
pthread_mutex_destroy(&mLock);
}
sp<Assembly> CodeCache::lookup(const AssemblyKeyBase& keyBase) const
{
pthread_mutex_lock(&mLock);
sp<Assembly> r;
ssize_t index = mCacheData.indexOfKey(key_t(keyBase));
if (index >= 0) {
const cache_entry_t& e = mCacheData.valueAt(index);
e.when = mWhen++;
r = e.entry;
}
pthread_mutex_unlock(&mLock);
return r;
}
int CodeCache::cache( const AssemblyKeyBase& keyBase,
const sp<Assembly>& assembly)
{
pthread_mutex_lock(&mLock);
const ssize_t assemblySize = assembly->size();
while (mCacheInUse + assemblySize > mCacheSize) {
// evict the LRU
size_t lru = 0;
size_t count = mCacheData.size();
for (size_t i=0 ; i<count ; i++) {
const cache_entry_t& e = mCacheData.valueAt(i);
if (e.when < mCacheData.valueAt(lru).when) {
lru = i;
}
}
const cache_entry_t& e = mCacheData.valueAt(lru);
mCacheInUse -= e.entry->size();
mCacheData.removeItemsAt(lru);
}
ssize_t err = mCacheData.add(key_t(keyBase), cache_entry_t(assembly, mWhen));
if (err >= 0) {
mCacheInUse += assemblySize;
mWhen++;
// synchronize caches...
#if defined(__arm__)
const long base = long(assembly->base());
const long curr = base + long(assembly->size());
err = cacheflush(base, curr, 0);
LOGE_IF(err, "__ARM_NR_cacheflush error %s\n",
strerror(errno));
#endif
}
pthread_mutex_unlock(&mLock);
return err;
}
// ----------------------------------------------------------------------------
}; // namespace android
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