aeee6c4413
We need this for Graphite enforcing single owner on the cache. Bug: skia:12754 Change-Id: Ib26167bce5ee5db6ffe60d3c49091ac14e05f32a Reviewed-on: https://skia-review.googlesource.com/c/skia/+/496604 Reviewed-by: Robert Phillips <robertphillips@google.com> Commit-Queue: Greg Daniel <egdaniel@google.com>
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef skgpu_SingleOwner_DEFINED
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#define skgpu_SingleOwner_DEFINED
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#include "include/core/SkTypes.h"
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namespace skgpu {
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#ifdef SK_DEBUG
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#include "include/private/SkMutex.h"
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#include "include/private/SkThreadID.h"
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#define SKGPU_ASSERT_SINGLE_OWNER(obj) \
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skgpu::SingleOwner::AutoEnforce debug_SingleOwner(obj, __FILE__, __LINE__);
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// This is a debug tool to verify an object is only being used from one thread at a time.
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class SingleOwner {
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public:
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SingleOwner() : fOwner(kIllegalThreadID), fReentranceCount(0) {}
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struct AutoEnforce {
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AutoEnforce(SingleOwner* so, const char* file, int line)
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: fFile(file), fLine(line), fSO(so) {
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fSO->enter(file, line);
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}
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~AutoEnforce() { fSO->exit(fFile, fLine); }
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const char* fFile;
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int fLine;
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SingleOwner* fSO;
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};
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private:
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void enter(const char* file, int line) {
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SkAutoMutexExclusive lock(fMutex);
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SkThreadID self = SkGetThreadID();
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SkASSERTF(fOwner == self || fOwner == kIllegalThreadID, "%s:%d Single owner failure.",
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file, line);
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fReentranceCount++;
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fOwner = self;
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}
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void exit(const char* file, int line) {
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SkAutoMutexExclusive lock(fMutex);
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SkASSERTF(fOwner == SkGetThreadID(), "%s:%d Single owner failure.", file, line);
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fReentranceCount--;
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if (fReentranceCount == 0) {
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fOwner = kIllegalThreadID;
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}
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}
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SkMutex fMutex;
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SkThreadID fOwner SK_GUARDED_BY(fMutex);
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int fReentranceCount SK_GUARDED_BY(fMutex);
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};
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#else
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#define SKGPU_ASSERT_SINGLE_OWNER(obj)
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class SingleOwner {}; // Provide a no-op implementation so we can pass pointers to constructors
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#endif
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} // namespace skgpu
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#endif
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