The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/images/SkImageRef_GlobalPool.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,100 @@
     1.4 +
     1.5 +/*
     1.6 + * Copyright 2011 Google Inc.
     1.7 + *
     1.8 + * Use of this source code is governed by a BSD-style license that can be
     1.9 + * found in the LICENSE file.
    1.10 + */
    1.11 +#include "SkImageRef_GlobalPool.h"
    1.12 +#include "SkImageRefPool.h"
    1.13 +#include "SkThread.h"
    1.14 +
    1.15 +SK_DECLARE_STATIC_MUTEX(gGlobalPoolMutex);
    1.16 +
    1.17 +/*
    1.18 + *  This returns the lazily-allocated global pool. It must be called
    1.19 + *  from inside the guard mutex, so we safely only ever allocate 1.
    1.20 + */
    1.21 +static SkImageRefPool* GetGlobalPool() {
    1.22 +    static SkImageRefPool* gPool;
    1.23 +    if (NULL == gPool) {
    1.24 +        gPool = SkNEW(SkImageRefPool);
    1.25 +        // call sk_atexit(...) when we have that, to free the global pool
    1.26 +    }
    1.27 +    return gPool;
    1.28 +}
    1.29 +
    1.30 +SkImageRef_GlobalPool::SkImageRef_GlobalPool(const SkImageInfo& info,
    1.31 +                                             SkStreamRewindable* stream,
    1.32 +                                             int sampleSize)
    1.33 +        : SkImageRef(info, stream, sampleSize, &gGlobalPoolMutex) {
    1.34 +    SkASSERT(&gGlobalPoolMutex == this->mutex());
    1.35 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
    1.36 +    GetGlobalPool()->addToHead(this);
    1.37 +}
    1.38 +
    1.39 +SkImageRef_GlobalPool::~SkImageRef_GlobalPool() {
    1.40 +    SkASSERT(&gGlobalPoolMutex == this->mutex());
    1.41 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
    1.42 +    GetGlobalPool()->detach(this);
    1.43 +}
    1.44 +
    1.45 +/*  By design, onUnlockPixels() already is inside the mutex-lock,
    1.46 + *  and it is the (indirect) caller of onDecode(), therefore we can assume
    1.47 + *  that we also are already inside the mutex. Hence, we can reference
    1.48 + *  the global-pool directly.
    1.49 + */
    1.50 +bool SkImageRef_GlobalPool::onDecode(SkImageDecoder* codec, SkStreamRewindable* stream,
    1.51 +                                     SkBitmap* bitmap, SkBitmap::Config config,
    1.52 +                                     SkImageDecoder::Mode mode) {
    1.53 +    if (!this->INHERITED::onDecode(codec, stream, bitmap, config, mode)) {
    1.54 +        return false;
    1.55 +    }
    1.56 +    if (mode == SkImageDecoder::kDecodePixels_Mode) {
    1.57 +        // no need to grab the mutex here, it has already been acquired.
    1.58 +        GetGlobalPool()->justAddedPixels(this);
    1.59 +    }
    1.60 +    return true;
    1.61 +}
    1.62 +
    1.63 +void SkImageRef_GlobalPool::onUnlockPixels() {
    1.64 +    this->INHERITED::onUnlockPixels();
    1.65 +
    1.66 +    // by design, onUnlockPixels() already is inside the mutex-lock
    1.67 +    GetGlobalPool()->canLosePixels(this);
    1.68 +}
    1.69 +
    1.70 +SkImageRef_GlobalPool::SkImageRef_GlobalPool(SkReadBuffer& buffer)
    1.71 +        : INHERITED(buffer, &gGlobalPoolMutex) {
    1.72 +    SkASSERT(&gGlobalPoolMutex == this->mutex());
    1.73 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
    1.74 +    GetGlobalPool()->addToHead(this);
    1.75 +}
    1.76 +
    1.77 +///////////////////////////////////////////////////////////////////////////////
    1.78 +// global imagerefpool wrappers
    1.79 +
    1.80 +size_t SkImageRef_GlobalPool::GetRAMBudget() {
    1.81 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
    1.82 +    return GetGlobalPool()->getRAMBudget();
    1.83 +}
    1.84 +
    1.85 +void SkImageRef_GlobalPool::SetRAMBudget(size_t size) {
    1.86 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
    1.87 +    GetGlobalPool()->setRAMBudget(size);
    1.88 +}
    1.89 +
    1.90 +size_t SkImageRef_GlobalPool::GetRAMUsed() {
    1.91 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
    1.92 +    return GetGlobalPool()->getRAMUsed();
    1.93 +}
    1.94 +
    1.95 +void SkImageRef_GlobalPool::SetRAMUsed(size_t usage) {
    1.96 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
    1.97 +    GetGlobalPool()->setRAMUsed(usage);
    1.98 +}
    1.99 +
   1.100 +void SkImageRef_GlobalPool::DumpPool() {
   1.101 +    SkAutoMutexAcquire ac(gGlobalPoolMutex);
   1.102 +    GetGlobalPool()->dump();
   1.103 +}