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      1 /*
      2  * Copyright 2015 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "GrOp.h"
      9 
     10 #include "GrMemoryPool.h"
     11 #include "SkSpinlock.h"
     12 
     13 // TODO I noticed a small benefit to using a larger exclusive pool for ops. Its very small, but
     14 // seems to be mostly consistent.  There is a lot in flux right now, but we should really revisit
     15 // this.
     16 
     17 
     18 // We use a global pool protected by a mutex(spinlock). Chrome may use the same GrContext on
     19 // different threads. The GrContext is not used concurrently on different threads and there is a
     20 // memory barrier between accesses of a context on different threads. Also, there may be multiple
     21 // GrContexts and those contexts may be in use concurrently on different threads.
     22 namespace {
     23 static SkSpinlock gOpPoolSpinLock;
     24 class MemoryPoolAccessor {
     25 public:
     26 
     27 // We know in the Android framework there is only one GrContext.
     28 #if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
     29     MemoryPoolAccessor() {}
     30     ~MemoryPoolAccessor() {}
     31 #else
     32     MemoryPoolAccessor() { gOpPoolSpinLock.acquire(); }
     33     ~MemoryPoolAccessor() { gOpPoolSpinLock.release(); }
     34 #endif
     35 
     36     GrMemoryPool* pool() const {
     37         static GrMemoryPool gPool(16384, 16384);
     38         return &gPool;
     39     }
     40 };
     41 }
     42 
     43 int32_t GrOp::gCurrOpClassID = GrOp::kIllegalOpID;
     44 
     45 int32_t GrOp::gCurrOpUniqueID = GrOp::kIllegalOpID;
     46 
     47 void* GrOp::operator new(size_t size) {
     48     return MemoryPoolAccessor().pool()->allocate(size);
     49 }
     50 
     51 void GrOp::operator delete(void* target) {
     52     return MemoryPoolAccessor().pool()->release(target);
     53 }
     54 
     55 GrOp::GrOp(uint32_t classID)
     56     : fClassID(classID)
     57     , fUniqueID(kIllegalOpID) {
     58     SkASSERT(classID == SkToU32(fClassID));
     59     SkDEBUGCODE(fBoundsFlags = kUninitialized_BoundsFlag);
     60 }
     61 
     62 GrOp::~GrOp() {}
     63