be03ef1565
Change-Id: Ie9ef50a14906c9350adbe16720291dca944ad7fc Reviewed-on: https://skia-review.googlesource.com/c/skia/+/418738 Commit-Queue: Kevin Lubick <kjlubick@google.com> Reviewed-by: John Stiles <johnstiles@google.com> Reviewed-by: Jorge Betancourt <jmbetancourt@google.com>
66 lines
1.8 KiB
C++
66 lines
1.8 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 GrSingleOwner_DEFINED
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#define GrSingleOwner_DEFINED
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#include "include/core/SkTypes.h"
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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 GR_ASSERT_SINGLE_OWNER(obj) \
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GrSingleOwner::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 GrSingleOwner {
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public:
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GrSingleOwner() : fOwner(kIllegalThreadID), fReentranceCount(0) {}
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struct AutoEnforce {
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AutoEnforce(GrSingleOwner* 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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GrSingleOwner* 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 GR_ASSERT_SINGLE_OWNER(obj)
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class GrSingleOwner {}; // Provide a no-op implementation so we can pass pointers to constructors
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#endif
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#endif
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