From 4f6e8d7a00cbeda1e70cc15be9c4af1018bdad53 Mon Sep 17 00:00:00 2001
From: The Android Open Source Project <initial-contribution@android.com>
Date: Tue, 21 Oct 2008 07:00:00 -0700
Subject: Initial Contribution

---
 libpixelflinger/codeflinger/CodeCache.cpp | 151 ++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 libpixelflinger/codeflinger/CodeCache.cpp

(limited to 'libpixelflinger/codeflinger/CodeCache.cpp')

diff --git a/libpixelflinger/codeflinger/CodeCache.cpp b/libpixelflinger/codeflinger/CodeCache.cpp
new file mode 100644
index 0000000..29410c8
--- /dev/null
+++ b/libpixelflinger/codeflinger/CodeCache.cpp
@@ -0,0 +1,151 @@
+/* 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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