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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkImageRef_GlobalPool.h"
#include "SkImageRefPool.h"
#include "SkThread.h"
SK_DECLARE_STATIC_MUTEX(gGlobalPoolMutex);
/*
* This returns the lazily-allocated global pool. It must be called
* from inside the guard mutex, so we safely only ever allocate 1.
*/
static SkImageRefPool* GetGlobalPool() {
static SkImageRefPool* gPool;
if (NULL == gPool) {
gPool = SkNEW(SkImageRefPool);
// call sk_atexit(...) when we have that, to free the global pool
}
return gPool;
}
SkImageRef_GlobalPool::SkImageRef_GlobalPool(const SkImageInfo& info,
SkStreamRewindable* stream,
int sampleSize)
: SkImageRef(info, stream, sampleSize, &gGlobalPoolMutex) {
SkASSERT(&gGlobalPoolMutex == this->mutex());
SkAutoMutexAcquire ac(gGlobalPoolMutex);
GetGlobalPool()->addToHead(this);
}
SkImageRef_GlobalPool::~SkImageRef_GlobalPool() {
SkASSERT(&gGlobalPoolMutex == this->mutex());
SkAutoMutexAcquire ac(gGlobalPoolMutex);
GetGlobalPool()->detach(this);
}
/* By design, onUnlockPixels() already is inside the mutex-lock,
* and it is the (indirect) caller of onDecode(), therefore we can assume
* that we also are already inside the mutex. Hence, we can reference
* the global-pool directly.
*/
bool SkImageRef_GlobalPool::onDecode(SkImageDecoder* codec, SkStreamRewindable* stream,
SkBitmap* bitmap, SkBitmap::Config config,
SkImageDecoder::Mode mode) {
if (!this->INHERITED::onDecode(codec, stream, bitmap, config, mode)) {
return false;
}
if (mode == SkImageDecoder::kDecodePixels_Mode) {
// no need to grab the mutex here, it has already been acquired.
GetGlobalPool()->justAddedPixels(this);
}
return true;
}
void SkImageRef_GlobalPool::onUnlockPixels() {
this->INHERITED::onUnlockPixels();
// by design, onUnlockPixels() already is inside the mutex-lock
GetGlobalPool()->canLosePixels(this);
}
SkImageRef_GlobalPool::SkImageRef_GlobalPool(SkFlattenableReadBuffer& buffer)
: INHERITED(buffer, &gGlobalPoolMutex) {
SkASSERT(&gGlobalPoolMutex == this->mutex());
SkAutoMutexAcquire ac(gGlobalPoolMutex);
GetGlobalPool()->addToHead(this);
}
///////////////////////////////////////////////////////////////////////////////
// global imagerefpool wrappers
size_t SkImageRef_GlobalPool::GetRAMBudget() {
SkAutoMutexAcquire ac(gGlobalPoolMutex);
return GetGlobalPool()->getRAMBudget();
}
void SkImageRef_GlobalPool::SetRAMBudget(size_t size) {
SkAutoMutexAcquire ac(gGlobalPoolMutex);
GetGlobalPool()->setRAMBudget(size);
}
size_t SkImageRef_GlobalPool::GetRAMUsed() {
SkAutoMutexAcquire ac(gGlobalPoolMutex);
return GetGlobalPool()->getRAMUsed();
}
void SkImageRef_GlobalPool::SetRAMUsed(size_t usage) {
SkAutoMutexAcquire ac(gGlobalPoolMutex);
GetGlobalPool()->setRAMUsed(usage);
}
void SkImageRef_GlobalPool::DumpPool() {
SkAutoMutexAcquire ac(gGlobalPoolMutex);
GetGlobalPool()->dump();
}
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