Revert of Replace GrResourceCache with GrResourceCache2.

src/gpu/GrResourceCache2.cpp

Index: src/gpu/GrResourceCache2.cpp
diff --git a/src/gpu/GrResourceCache2.cpp b/src/gpu/GrResourceCache2.cpp
index 109e815dacc9150d55af160cf46254c9ec517b46..83143d78185898c8ed0ed83420228019de1f9d42 100644
--- a/src/gpu/GrResourceCache2.cpp
+++ b/src/gpu/GrResourceCache2.cpp
@@ -9,13 +9,6 @@
 
 #include "GrResourceCache2.h"
 #include "GrGpuResource.h"  
-
-#include "SkGr.h"
-#include "SkMessageBus.h"
-
-DECLARE_SKMESSAGEBUS_MESSAGE(GrResourceInvalidatedMessage);
-
-//////////////////////////////////////////////////////////////////////////////
 
 GrResourceKey& GrResourceKey::NullScratchKey() {
     static const GrCacheID::Key kBogusKey = { { {0} } };
@@ -34,85 +27,26 @@
     return gDomain;
 }
 
-GrResourceKey::ResourceType GrResourceKey::GenerateResourceType() {
-    static int32_t gNextType = 0;
-
-    int32_t type = sk_atomic_inc(&gNextType);
-    if (type >= (1 << 8 * sizeof(ResourceType))) {
-        SkFAIL("Too many Resource Types");
-    }
-
-    return static_cast<ResourceType>(type);
-}
-
 //////////////////////////////////////////////////////////////////////////////
-
-class GrResourceCache2::AutoValidate : ::SkNoncopyable {
-public:
-    AutoValidate(GrResourceCache2* cache) : fCache(cache) { cache->validate(); }
-    ~AutoValidate() { fCache->validate(); }
-private:
-    GrResourceCache2* fCache;
-};
-
- //////////////////////////////////////////////////////////////////////////////
-
-static const int kDefaultMaxCount = 2 * (1 << 10);
-static const size_t kDefaultMaxSize = 96 * (1 << 20);
-
-GrResourceCache2::GrResourceCache2()
-    : fMaxCount(kDefaultMaxCount)
-    , fMaxBytes(kDefaultMaxSize)
-#if GR_CACHE_STATS
-    , fHighWaterCount(0)
-    , fHighWaterBytes(0)
-#endif
-    , fCount(0)
-    , fBytes(0)
-    , fPurging(false)
-    , fNewlyPurgableResourceWhilePurging(false)
-    , fOverBudgetCB(NULL)
-    , fOverBudgetData(NULL) {
-}
 
 GrResourceCache2::~GrResourceCache2() {
     this->releaseAll();
 }
 
-void GrResourceCache2::setLimits(int count, size_t bytes) {
-    fMaxCount = count;
-    fMaxBytes = bytes;
-    this->purgeAsNeeded();
-}
-
 void GrResourceCache2::insertResource(GrGpuResource* resource) {
-    AutoValidate av(this);
-
     SkASSERT(resource);
     SkASSERT(!resource->wasDestroyed());
     SkASSERT(!this->isInCache(resource));
-    SkASSERT(!fPurging);
     fResources.addToHead(resource);
-    resource->ref();
-
     ++fCount;
-    SkDEBUGCODE(fHighWaterCount = SkTMax(fCount, fHighWaterCount));
-    fBytes += resource->gpuMemorySize();
-    SkDEBUGCODE(fHighWaterBytes = SkTMax(fBytes, fHighWaterBytes));
     if (!resource->cacheAccess().getScratchKey().isNullScratch()) {
         // TODO(bsalomon): Make this assertion possible.
         // SkASSERT(!resource->isWrapped());
         fScratchMap.insert(resource->cacheAccess().getScratchKey(), resource);
     }
-    
-    this->purgeAsNeeded();
 }
 
 void GrResourceCache2::removeResource(GrGpuResource* resource) {
-    AutoValidate av(this);
-
-    --fCount;
-    fBytes -= resource->gpuMemorySize();
     SkASSERT(this->isInCache(resource));
     fResources.remove(resource);    
     if (!resource->cacheAccess().getScratchKey().isNullScratch()) {
@@ -121,16 +55,13 @@
     if (const GrResourceKey* contentKey = resource->cacheAccess().getContentKey()) {
         fContentHash.remove(*contentKey);
     }
+    --fCount;
 }
 
 void GrResourceCache2::abandonAll() {
-    AutoValidate av(this);
-
-    SkASSERT(!fPurging);
     while (GrGpuResource* head = fResources.head()) {
         SkASSERT(!head->wasDestroyed());
         head->abandon();
-        head->unref();
         // abandon should have already removed this from the list.
         SkASSERT(head != fResources.head());
     }
@@ -140,13 +71,9 @@
 }
 
 void GrResourceCache2::releaseAll() {
-    AutoValidate av(this);
-
-    SkASSERT(!fPurging);
     while (GrGpuResource* head = fResources.head()) {
         SkASSERT(!head->wasDestroyed());
         head->release();
-        head->unref();
         // release should have already removed this from the list.
         SkASSERT(head != fResources.head());
     }
@@ -172,16 +99,11 @@
 
 GrGpuResource* GrResourceCache2::findAndRefScratchResource(const GrResourceKey& scratchKey,
                                                            uint32_t flags) {
-    AutoValidate av(this);
-
-    SkASSERT(!fPurging);
     SkASSERT(scratchKey.isScratch());
 
-    GrGpuResource* resource;
     if (flags & (kPreferNoPendingIO_ScratchFlag | kRequireNoPendingIO_ScratchFlag)) {
-        resource = fScratchMap.find(scratchKey, AvailableForScratchUse(true));
+        GrGpuResource* resource = fScratchMap.find(scratchKey, AvailableForScratchUse(true));
         if (resource) {
-            this->makeResourceMRU(resource);
             return SkRef(resource);
         } else if (flags & kRequireNoPendingIO_ScratchFlag) {
             return NULL;
@@ -189,18 +111,11 @@
         // TODO: fail here when kPrefer is specified, we didn't find a resource without pending io,
         // but there is still space in our budget for the resource.
     }
-    resource = fScratchMap.find(scratchKey, AvailableForScratchUse(false));
-    if (resource) {
-        resource->ref();
-        this->makeResourceMRU(resource);
-    }
-    return resource;
+    return SkSafeRef(fScratchMap.find(scratchKey, AvailableForScratchUse(false)));
 }
 
 bool GrResourceCache2::didSetContentKey(GrGpuResource* resource) {
-    SkASSERT(!fPurging);
     SkASSERT(resource);
-    SkASSERT(this->isInCache(resource));
     SkASSERT(resource->cacheAccess().getContentKey());
     SkASSERT(!resource->cacheAccess().getContentKey()->isScratch());
 
@@ -210,214 +125,5 @@
     }
 
     fContentHash.add(resource);
-    this->validate();
     return true;
 }
-
-void GrResourceCache2::makeResourceMRU(GrGpuResource* resource) {
-    AutoValidate av(this);
-
-    SkASSERT(!fPurging);
-    SkASSERT(resource);
-    SkASSERT(this->isInCache(resource));
-    fResources.remove(resource);    
-    fResources.addToHead(resource);    
-}
-
-void GrResourceCache2::notifyPurgable(const GrGpuResource* resource) {
-    SkASSERT(resource);
-    SkASSERT(this->isInCache(resource));
-    SkASSERT(resource->isPurgable());
-
-    // We can't purge if in the middle of purging because purge is iterating. Instead record
-    // that additional resources became purgable.
-    if (fPurging) {
-        fNewlyPurgableResourceWhilePurging = true;
-        return;
-    }
-
-    // Purge the resource if we're over budget
-    bool overBudget = fCount > fMaxCount || fBytes > fMaxBytes;
-
-    // We should not be over budget here unless all resources are unpuragble.
-#ifdef SK_DEBUG
-    if (overBudget) {
-        ResourceList::Iter iter;
-        GrGpuResource* r = iter.init(fResources, ResourceList::Iter::kHead_IterStart);
-        for ( ; r; r = iter.next()) {
-            SkASSERT(r == resource || !r->isPurgable());
-        }
-    }
-#endif
-
-    // Also purge if the resource has neither a valid scratch key nor a content key.
-    bool noKey = !resource->cacheAccess().isScratch() &&
-                 (NULL == resource->cacheAccess().getContentKey());
-
-    if (overBudget || noKey) {
-        SkDEBUGCODE(int beforeCount = fCount;)
-        resource->unref();
-        SkASSERT(fCount == beforeCount - 1);
-    }
-
-    this->validate();
-}
-
-void GrResourceCache2::didChangeGpuMemorySize(const GrGpuResource* resource, size_t oldSize) {
-    // SkASSERT(!fPurging); GrPathRange increases size during flush. :(
-    SkASSERT(resource);
-    SkASSERT(this->isInCache(resource));
-
-    fBytes += resource->gpuMemorySize() - oldSize;
-    SkDEBUGCODE(fHighWaterBytes = SkTMax(fBytes, fHighWaterBytes));
-
-    this->purgeAsNeeded();
-    this->validate();
-}
-
-void GrResourceCache2::internalPurgeAsNeeded() {
-    SkASSERT(!fPurging);
-    SkASSERT(!fNewlyPurgableResourceWhilePurging);
-    SkASSERT(fCount > fMaxCount || fBytes > fMaxBytes);
-
-    fPurging = true;
-
-    AutoValidate av(this); // Put this after setting fPurging so we're allowed to be over budget.
-
-    bool overBudget = true;
-    do {
-        fNewlyPurgableResourceWhilePurging = false;
-        ResourceList::Iter resourceIter;
-        GrGpuResource* resource = resourceIter.init(fResources,
-                                                    ResourceList::Iter::kTail_IterStart);
-
-        while (resource) {
-            GrGpuResource* prev = resourceIter.prev();
-            if (resource->isPurgable()) {
-                resource->unref();
-            }
-            resource = prev;
-            if (fCount <= fMaxCount && fBytes <= fMaxBytes) {
-                overBudget = false;
-                resource = NULL;
-            }
-        }
-
-        if (!fNewlyPurgableResourceWhilePurging && overBudget && fOverBudgetCB) {
-            // Despite the purge we're still over budget. Call our over budget callback.
-            (*fOverBudgetCB)(fOverBudgetData);
-        }
-    } while (overBudget && fNewlyPurgableResourceWhilePurging);
-
-    fNewlyPurgableResourceWhilePurging = false;
-    fPurging = false;
-}
-
-void GrResourceCache2::purgeAllUnlocked() {
-    SkASSERT(!fPurging);
-    SkASSERT(!fNewlyPurgableResourceWhilePurging);
-
-    fPurging = true;
-
-    AutoValidate av(this); // Put this after setting fPurging so we're allowed to be over budget.
-
-    do {
-        fNewlyPurgableResourceWhilePurging = false;
-        ResourceList::Iter resourceIter;
-        GrGpuResource* resource =
-            resourceIter.init(fResources, ResourceList::Iter::kTail_IterStart);
-
-        while (resource) {
-            GrGpuResource* prev = resourceIter.prev();
-            if (resource->isPurgable()) {
-                resource->unref();
-            } 
-            resource = prev;
-        }
-
-        if (!fNewlyPurgableResourceWhilePurging && fCount && fOverBudgetCB) {
-            (*fOverBudgetCB)(fOverBudgetData);
-        }
-    } while (fNewlyPurgableResourceWhilePurging);
-    fPurging = false;
-}
-
-#ifdef SK_DEBUG
-void GrResourceCache2::validate() const {
-    size_t bytes = 0;
-    int count = 0;
-    int locked = 0;
-    int scratch = 0;
-    int couldBeScratch = 0;
-    int content = 0;
-
-    ResourceList::Iter iter;
-    GrGpuResource* resource = iter.init(fResources, ResourceList::Iter::kHead_IterStart);
-    for ( ; resource; resource = iter.next()) {
-        bytes += resource->gpuMemorySize();
-        ++count;
-
-        if (!resource->isPurgable()) {
-            ++locked;
-        }
-
-        if (resource->cacheAccess().isScratch()) {
-            SkASSERT(NULL == resource->cacheAccess().getContentKey());
-            ++scratch;
-            SkASSERT(fScratchMap.countForKey(resource->cacheAccess().getScratchKey()));
-        } else if (!resource->cacheAccess().getScratchKey().isNullScratch()) {
-            SkASSERT(NULL != resource->cacheAccess().getContentKey());
-            ++couldBeScratch;
-            SkASSERT(fScratchMap.countForKey(resource->cacheAccess().getScratchKey()));
-        }
-
-        if (const GrResourceKey* contentKey = resource->cacheAccess().getContentKey()) {
-            ++content;
-            SkASSERT(fContentHash.find(*contentKey) == resource);
-        }
-    }
-
-    SkASSERT(bytes == fBytes);
-    SkASSERT(count == fCount);
-#if GR_CACHE_STATS
-    SkASSERT(bytes <= fHighWaterBytes);
-    SkASSERT(count <= fHighWaterCount);
-#endif
-    SkASSERT(content == fContentHash.count());
-    SkASSERT(scratch + couldBeScratch == fScratchMap.count());
-
-    bool overBudget = bytes > fMaxBytes || count > fMaxCount;
-    SkASSERT(!overBudget || locked == count || fPurging);
-}
-#endif
-
-#if GR_CACHE_STATS
-void GrResourceCache2::printStats() const {
-    this->validate();
-
-    int locked = 0;
-    int scratch = 0;
-
-    ResourceList::Iter iter;
-    GrGpuResource* resource = iter.init(fResources, ResourceList::Iter::kHead_IterStart);
-
-    for ( ; resource; resource = iter.next()) {
-        if (!resource->isPurgable()) {
-            ++locked;
-        }
-        if (resource->cacheAccess().isScratch()) {
-            ++scratch;
-        }
-    }
-
-    float countUtilization = (100.f * fCount) / fMaxCount;
-    float byteUtilization = (100.f * fBytes) / fMaxBytes;
-
-    SkDebugf("Budget: %d items %d bytes\n", fMaxCount, fMaxBytes);
-    SkDebugf("\t\tEntry Count: current %d (%d locked, %d scratch %.2g%% full), high %d\n",
-                fCount, locked, scratch, countUtilization, fHighWaterCount);
-    SkDebugf("\t\tEntry Bytes: current %d (%.2g%% full) high %d\n",
-                fBytes, byteUtilization, fHighWaterBytes);
-}
-
-#endif