GrBatch.cpp revision 1b55a963a2374a14bb82eb887bb99ee91680f0eb 
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 "GrBatch.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 batches.  Its very small,
14// but seems to be mostly consistent.  There is a lot in flux right now, but we should really
15// revisit this when batch is everywhere
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.
22namespace {
23SK_DECLARE_STATIC_SPINLOCK(gBatchSpinlock);
24class MemoryPoolAccessor {
25public:
26    MemoryPoolAccessor() { gBatchSpinlock.acquire(); }
27
28    ~MemoryPoolAccessor() { gBatchSpinlock.release(); }
29
30    GrMemoryPool* pool() const {
31        static GrMemoryPool gPool(16384, 16384);
32        return &gPool;
33    }
34};
35}
36
37int32_t GrBatch::gCurrBatchClassID = GrBatch::kIllegalBatchID;
38
39GrBATCH_SPEW(int32_t GrBatch::gCurrBatchUniqueID = GrBatch::kIllegalBatchID;)
40
41void* GrBatch::operator new(size_t size) {
42    return MemoryPoolAccessor().pool()->allocate(size);
43}
44
45void GrBatch::operator delete(void* target) {
46    return MemoryPoolAccessor().pool()->release(target);
47}
48
49GrBatch::GrBatch(uint32_t classID)
50    : fClassID(classID)
51#if GR_BATCH_SPEW
52    , fUniqueID(GenBatchID())
53#endif
54{
55    SkDEBUGCODE(fUsed = false;)
56}
57
58GrBatch::~GrBatch() {}
59