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Commit 8a5d80d7 authored by TreeHugger Robot's avatar TreeHugger Robot Committed by Android (Google) Code Review
Browse files

Merge "Add a return value to BlobCache::set" into tm-dev

parents 97b8968e 2337796c

opengl/libs/EGL/BlobCache.cpp

+14 −10
Original line number Diff line number Diff line
@@ -52,35 +52,37 @@ BlobCache::BlobCache(size_t maxKeySize, size_t maxValueSize, size_t maxTotalSize 
    ALOGV("initializing random seed using %lld", (unsigned long long)now);

}



void BlobCache::set(const void* key, size_t keySize, const void* value, size_t valueSize) {

BlobCache::InsertResult BlobCache::set(const void* key, size_t keySize, const void* value,

                                       size_t valueSize) {

    if (mMaxKeySize < keySize) {

        ALOGV("set: not caching because the key is too large: %zu (limit: %zu)", keySize,

              mMaxKeySize);

        return;

        return InsertResult::kKeyTooBig;

    }

    if (mMaxValueSize < valueSize) {

        ALOGV("set: not caching because the value is too large: %zu (limit: %zu)", valueSize,

              mMaxValueSize);

        return;

        return InsertResult::kValueTooBig;

    }

    if (mMaxTotalSize < keySize + valueSize) {

        ALOGV("set: not caching because the combined key/value size is too "

              "large: %zu (limit: %zu)",

              keySize + valueSize, mMaxTotalSize);

        return;

        return InsertResult::kCombinedTooBig;

    }

    if (keySize == 0) {

        ALOGW("set: not caching because keySize is 0");

        return;

        return InsertResult::kInvalidKeySize;

    }

    if (valueSize <= 0) {

    if (valueSize == 0) {

        ALOGW("set: not caching because valueSize is 0");

        return;

        return InsertResult::kInvalidValueSize;

    }



    std::shared_ptr<Blob> cacheKey(new Blob(key, keySize, false));

    CacheEntry cacheEntry(cacheKey, nullptr);



    bool didClean = false;

    while (true) {

        auto index = std::lower_bound(mCacheEntries.begin(), mCacheEntries.end(), cacheEntry);

        if (index == mCacheEntries.end() || cacheEntry < *index) {
@@ -92,13 +94,14 @@ void BlobCache::set(const void* key, size_t keySize, const void* value, size_t v 
                if (isCleanable()) {

                    // Clean the cache and try again.

                    clean();

                    didClean = true;

                    continue;

                } else {

                    ALOGV("set: not caching new key/value pair because the "

                          "total cache size limit would be exceeded: %zu "

                          "(limit: %zu)",

                          keySize + valueSize, mMaxTotalSize);

                    break;

                    return InsertResult::kNotEnoughSpace;

                }

            }

            mCacheEntries.insert(index, CacheEntry(keyBlob, valueBlob));
@@ -114,12 +117,13 @@ void BlobCache::set(const void* key, size_t keySize, const void* value, size_t v 
                if (isCleanable()) {

                    // Clean the cache and try again.

                    clean();

                    didClean = true;

                    continue;

                } else {

                    ALOGV("set: not caching new value because the total cache "

                          "size limit would be exceeded: %zu (limit: %zu)",

                          keySize + valueSize, mMaxTotalSize);

                    break;

                    return InsertResult::kNotEnoughSpace;

                }

            }

            index->setValue(valueBlob);
@@ -128,7 +132,7 @@ void BlobCache::set(const void* key, size_t keySize, const void* value, size_t v 
                  "value",

                  keySize, valueSize);

        }

        break;

        return didClean ? InsertResult::kDidClean : InsertResult::kInserted;

    }

}

opengl/libs/EGL/BlobCache.h

+21 −1
Original line number Diff line number Diff line
@@ -39,6 +39,26 @@ public: 
    // (key sizes plus value sizes) will not exceed maxTotalSize.

    BlobCache(size_t maxKeySize, size_t maxValueSize, size_t maxTotalSize);



    // Return value from set(), below.

    enum class InsertResult {

        // The key is larger than maxKeySize specified in the constructor.

        kKeyTooBig,

        // The value is larger than maxValueSize specified in the constructor.

        kValueTooBig,

        // The combined key + value is larger than maxTotalSize specified in the constructor.

        kCombinedTooBig,

        // keySize is 0

        kInvalidKeySize,

        // valueSize is 0

        kInvalidValueSize,

        // Unable to free enough space to fit the new entry.

        kNotEnoughSpace,

        // The new entry was inserted, but an old entry had to be evicted.

        kDidClean,

        // There was enough room in the cache and the new entry was inserted.

        kInserted,



    };

    // set inserts a new binary value into the cache and associates it with the

    // given binary key.  If the key or value are too large for the cache then

    // the cache remains unchanged.  This includes the case where a different
@@ -54,7 +74,7 @@ public: 
    //   0 < keySize

    //   value != NULL

    //   0 < valueSize

    void set(const void* key, size_t keySize, const void* value, size_t valueSize);

    InsertResult set(const void* key, size_t keySize, const void* value, size_t valueSize);



    // get retrieves from the cache the binary value associated with a given

    // binary key.  If the key is present in the cache then the length of the

opengl/libs/EGL/BlobCache_test.cpp

+60 −19
Original line number Diff line number Diff line
@@ -49,7 +49,7 @@ protected: 


TEST_F(BlobCacheTest, CacheSingleValueSucceeds) {

    unsigned char buf[4] = {0xee, 0xee, 0xee, 0xee};

    mBC->set("abcd", 4, "efgh", 4);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, "efgh", 4));

    ASSERT_EQ(size_t(4), mBC->get("abcd", 4, buf, 4));

    ASSERT_EQ('e', buf[0]);

    ASSERT_EQ('f', buf[1]);
@@ -59,8 +59,8 @@ TEST_F(BlobCacheTest, CacheSingleValueSucceeds) { 


TEST_F(BlobCacheTest, CacheTwoValuesSucceeds) {

    unsigned char buf[2] = {0xee, 0xee};

    mBC->set("ab", 2, "cd", 2);

    mBC->set("ef", 2, "gh", 2);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("ab", 2, "cd", 2));

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("ef", 2, "gh", 2));

    ASSERT_EQ(size_t(2), mBC->get("ab", 2, buf, 2));

    ASSERT_EQ('c', buf[0]);

    ASSERT_EQ('d', buf[1]);
@@ -71,7 +71,7 @@ TEST_F(BlobCacheTest, CacheTwoValuesSucceeds) { 


TEST_F(BlobCacheTest, GetOnlyWritesInsideBounds) {

    unsigned char buf[6] = {0xee, 0xee, 0xee, 0xee, 0xee, 0xee};

    mBC->set("abcd", 4, "efgh", 4);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, "efgh", 4));

    ASSERT_EQ(size_t(4), mBC->get("abcd", 4, buf + 1, 4));

    ASSERT_EQ(0xee, buf[0]);

    ASSERT_EQ('e', buf[1]);
@@ -83,7 +83,7 @@ TEST_F(BlobCacheTest, GetOnlyWritesInsideBounds) { 


TEST_F(BlobCacheTest, GetOnlyWritesIfBufferIsLargeEnough) {

    unsigned char buf[3] = {0xee, 0xee, 0xee};

    mBC->set("abcd", 4, "efgh", 4);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, "efgh", 4));

    ASSERT_EQ(size_t(4), mBC->get("abcd", 4, buf, 3));

    ASSERT_EQ(0xee, buf[0]);

    ASSERT_EQ(0xee, buf[1]);
@@ -91,14 +91,14 @@ TEST_F(BlobCacheTest, GetOnlyWritesIfBufferIsLargeEnough) { 
}



TEST_F(BlobCacheTest, GetDoesntAccessNullBuffer) {

    mBC->set("abcd", 4, "efgh", 4);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, "efgh", 4));

    ASSERT_EQ(size_t(4), mBC->get("abcd", 4, nullptr, 0));

}



TEST_F(BlobCacheTest, MultipleSetsCacheLatestValue) {

    unsigned char buf[4] = {0xee, 0xee, 0xee, 0xee};

    mBC->set("abcd", 4, "efgh", 4);

    mBC->set("abcd", 4, "ijkl", 4);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, "efgh", 4));

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, "ijkl", 4));

    ASSERT_EQ(size_t(4), mBC->get("abcd", 4, buf, 4));

    ASSERT_EQ('i', buf[0]);

    ASSERT_EQ('j', buf[1]);
@@ -108,8 +108,8 @@ TEST_F(BlobCacheTest, MultipleSetsCacheLatestValue) { 


TEST_F(BlobCacheTest, SecondSetKeepsFirstValueIfTooLarge) {

    unsigned char buf[MAX_VALUE_SIZE + 1] = {0xee, 0xee, 0xee, 0xee};

    mBC->set("abcd", 4, "efgh", 4);

    mBC->set("abcd", 4, buf, MAX_VALUE_SIZE + 1);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, "efgh", 4));

    ASSERT_EQ(BlobCache::InsertResult::kValueTooBig, mBC->set("abcd", 4, buf, MAX_VALUE_SIZE + 1));

    ASSERT_EQ(size_t(4), mBC->get("abcd", 4, buf, 4));

    ASSERT_EQ('e', buf[0]);

    ASSERT_EQ('f', buf[1]);
@@ -123,7 +123,7 @@ TEST_F(BlobCacheTest, DoesntCacheIfKeyIsTooBig) { 
    for (int i = 0; i < MAX_KEY_SIZE + 1; i++) {

        key[i] = 'a';

    }

    mBC->set(key, MAX_KEY_SIZE + 1, "bbbb", 4);

    ASSERT_EQ(BlobCache::InsertResult::kKeyTooBig, mBC->set(key, MAX_KEY_SIZE + 1, "bbbb", 4));

    ASSERT_EQ(size_t(0), mBC->get(key, MAX_KEY_SIZE + 1, buf, 4));

    ASSERT_EQ(0xee, buf[0]);

    ASSERT_EQ(0xee, buf[1]);
@@ -136,7 +136,7 @@ TEST_F(BlobCacheTest, DoesntCacheIfValueIsTooBig) { 
    for (int i = 0; i < MAX_VALUE_SIZE + 1; i++) {

        buf[i] = 'b';

    }

    mBC->set("abcd", 4, buf, MAX_VALUE_SIZE + 1);

    ASSERT_EQ(BlobCache::InsertResult::kValueTooBig, mBC->set("abcd", 4, buf, MAX_VALUE_SIZE + 1));

    for (int i = 0; i < MAX_VALUE_SIZE + 1; i++) {

        buf[i] = 0xee;

    }
@@ -163,7 +163,8 @@ TEST_F(BlobCacheTest, DoesntCacheIfKeyValuePairIsTooBig) { 
        buf[i] = 'b';

    }



    mBC->set(key, MAX_KEY_SIZE, buf, MAX_VALUE_SIZE);

    ASSERT_EQ(BlobCache::InsertResult::kCombinedTooBig,

              mBC->set(key, MAX_KEY_SIZE, buf, MAX_VALUE_SIZE));

    ASSERT_EQ(size_t(0), mBC->get(key, MAX_KEY_SIZE, nullptr, 0));

}
@@ -173,7 +174,7 @@ TEST_F(BlobCacheTest, CacheMaxKeySizeSucceeds) { 
    for (int i = 0; i < MAX_KEY_SIZE; i++) {

        key[i] = 'a';

    }

    mBC->set(key, MAX_KEY_SIZE, "wxyz", 4);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set(key, MAX_KEY_SIZE, "wxyz", 4));

    ASSERT_EQ(size_t(4), mBC->get(key, MAX_KEY_SIZE, buf, 4));

    ASSERT_EQ('w', buf[0]);

    ASSERT_EQ('x', buf[1]);
@@ -186,7 +187,7 @@ TEST_F(BlobCacheTest, CacheMaxValueSizeSucceeds) { 
    for (int i = 0; i < MAX_VALUE_SIZE; i++) {

        buf[i] = 'b';

    }

    mBC->set("abcd", 4, buf, MAX_VALUE_SIZE);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("abcd", 4, buf, MAX_VALUE_SIZE));

    for (int i = 0; i < MAX_VALUE_SIZE; i++) {

        buf[i] = 0xee;

    }
@@ -212,13 +213,45 @@ TEST_F(BlobCacheTest, CacheMaxKeyValuePairSizeSucceeds) { 
        buf[i] = 'b';

    }



    mBC->set(key, MAX_KEY_SIZE, buf, bufSize);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set(key, MAX_KEY_SIZE, buf, bufSize));

    ASSERT_EQ(size_t(bufSize), mBC->get(key, MAX_KEY_SIZE, nullptr, 0));

}



// Verify that kNotEnoughSpace is returned from BlobCache::set when expected.

// Note: This relies on internal knowledge of how BlobCache works.

TEST_F(BlobCacheTest, NotEnoughSpace) {

    // Insert a small entry into the cache.

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("x", 1, "y", 1));



    // Attempt to put a max size entry into the cache. If the cache were empty,

    // as in CacheMaxKeyValuePairSizeSucceeds, this would succeed. Based on the

    // current logic of BlobCache, the small entry is not big enough to allow it

    // to be cleaned to insert the new entry.

    ASSERT_TRUE(MAX_KEY_SIZE < MAX_TOTAL_SIZE);



    enum { bufSize = MAX_TOTAL_SIZE - MAX_KEY_SIZE };



    char key[MAX_KEY_SIZE];

    char buf[bufSize];

    for (int i = 0; i < MAX_KEY_SIZE; i++) {

        key[i] = 'a';

    }

    for (int i = 0; i < bufSize; i++) {

        buf[i] = 'b';

    }



    ASSERT_EQ(BlobCache::InsertResult::kNotEnoughSpace, mBC->set(key, MAX_KEY_SIZE, buf, bufSize));

    ASSERT_EQ(0, mBC->get(key, MAX_KEY_SIZE, nullptr, 0));



    // The original entry remains in the cache.

    unsigned char buf2[1] = {0xee};

    ASSERT_EQ(size_t(1), mBC->get("x", 1, buf2, 1));

    ASSERT_EQ('y', buf2[0]);

}



TEST_F(BlobCacheTest, CacheMinKeyAndValueSizeSucceeds) {

    unsigned char buf[1] = {0xee};

    mBC->set("x", 1, "y", 1);

    ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set("x", 1, "y", 1));

    ASSERT_EQ(size_t(1), mBC->get("x", 1, buf, 1));

    ASSERT_EQ('y', buf[0]);

}
@@ -243,12 +276,12 @@ TEST_F(BlobCacheTest, ExceedingTotalLimitHalvesCacheSize) { 
    const int maxEntries = MAX_TOTAL_SIZE / 2;

    for (int i = 0; i < maxEntries; i++) {

        uint8_t k = i;

        mBC->set(&k, 1, "x", 1);

        ASSERT_EQ(BlobCache::InsertResult::kInserted, mBC->set(&k, 1, "x", 1));

    }

    // Insert one more entry, causing a cache overflow.

    {

        uint8_t k = maxEntries;

        mBC->set(&k, 1, "x", 1);

        ASSERT_EQ(BlobCache::InsertResult::kDidClean, mBC->set(&k, 1, "x", 1));

    }

    // Count the number of entries in the cache.

    int numCached = 0;
@@ -261,6 +294,14 @@ TEST_F(BlobCacheTest, ExceedingTotalLimitHalvesCacheSize) { 
    ASSERT_EQ(maxEntries / 2 + 1, numCached);

}



TEST_F(BlobCacheTest, InvalidKeySize) {

    ASSERT_EQ(BlobCache::InsertResult::kInvalidKeySize, mBC->set("", 0, "efgh", 4));

}



TEST_F(BlobCacheTest, InvalidValueSize) {

    ASSERT_EQ(BlobCache::InsertResult::kInvalidValueSize, mBC->set("abcd", 4, "", 0));

}



class BlobCacheFlattenTest : public BlobCacheTest {

protected:

    virtual void SetUp() {