This code requires fewer macros to use it (just one), has less code in macro
definitions, and has simpler synchronization code (just atomic ints, no SkOnce,
no SkMutex, etc.)
A minor downside, we lose indentation and reverse-ordering in the final report:
Leaked SkRefCntBase: 7
Leaked SkFontMgr: 1
Leaked SkWeakRefCnt: 1
Leaked SkTypeface: 1
Leaked SkFlattenable: 3
Leaked SkXfermode: 3
Leaked SkPathRef: 1
Leaked SkPixelRef: 1
Leaked SkMallocPixelRef: 1
becomes
Leaked SkXfermode: 3
Leaked SkMallocPixelRef: 1
Leaked SkPixelRef: 1
Leaked SkPathRef: 1
Leaked SkFlattenable: 3
Leaked SkTypeface: 1
Leaked SkWeakRefCnt: 1
Leaked SkFontMgr: 1
Leaked SkRefCntBase: 7
This is motivated by wanting to land https://codereview.chromium.org/806473006/,
which makes sure all static use of SkOnce are in global scope. The current
implementation of SkInstCnt uses them in function scope, which isn't safe.
BUG=skia:
No public API changes.
TBR=reed@google.com
Review URL: https://codereview.chromium.org/841263004
1 Remove atExit feature: clients can do it just as well as SkOnce can.
2 Remove support for functors: no one but the unit test did that.
3 Remove support for unused non-static SkOnceFlag (no SK_ONCE_INIT).
4 Add SkOnce variants for no-arg functions so we're not forced to pass dummy values all the time.
5 Merge SkSpinlock and SkOnceFlag, making all members private.
6 More notes about memory barriers, adding an acquire load after acquiring the spinlock.
BUG=skia:
R=bungeman@google.com, mtklein@google.com, reed@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/302083003
Make leak counters implemented with SK_DECLARE_INST_COUNT thread-safe.
Enable the leak counting for Debug builds when Skia is built as a
static library. Having SK_DECLARE_INST_COUNT without
SK_DEFINE_INST_COUNT relies on static variables in member functions
declared in the header files. These might be duplicated in the clients
of the library when Skia is built as a dynamic library, producing
incorrect operation.
Protect the instance counter initialization step (initStep) by
using SkOnce.
Makes SkOnce.h part of the public API, since SkInstCnt is public.
Protect the per-class child list shared variable with a per-class mutex.
Changes the behavior in the way that if the child list has been
"cleaned up", it will still try to create subsequent child lists.
BUG=skia:1219
R=robertphillips@google.com, mtklein@google.com, bsalomon@google.com, bungeman@google.com, djsollen@google.com
Author: kkinnunen@nvidia.com
Review URL: https://codereview.chromium.org/99483003
git-svn-id: http://skia.googlecode.com/svn/trunk@13120 2bbb7eff-a529-9590-31e7-b0007b416f81
Skia cannot use Chromium's implementation of mutex (Lock) due to static
initializers. However, we would like to be able to use Chromium's
implementation of atomics. This motivates the split of implementation.
Skia's atomic and mutex calls should be inlinable, especially the atomics.
These calls often compile down to very few instructions, and we currently have
the overhead of a function call. This motivates the header implementation.
There is still a desire for the build system to select the implementation, so
the SK_XXX_PLATFORM_H pattern for header files is introduced. This allows the
build system to control which platform specific header files are chosen.
The Chromium side changes (most of which will need to go in before this change
can be found at https://codereview.chromium.org/19477005/ .
The Chromium side changes after this lands can be seen at
https://codereview.chromium.org/98073013 .
Review URL: https://codereview.chromium.org/19808007
git-svn-id: http://skia.googlecode.com/svn/trunk@12738 2bbb7eff-a529-9590-31e7-b0007b416f81
Add INHERITED declarations to class declarations that prevent
compilation with the flag.
Remove SK_DEFINE_INST_COUNT from all class implementations. Instead,
use function-local static variables in the reference count helper
classes to create the global instances to store the needed info. The
accessor functions are defined inline in the helper classes, so
definitions are not needed. The initialization point of the variables
should be as well defined as previously.
Remove SK_DECLARE_INST_COUNT_TEMPLATE and use SK_DECLARE_INST_COUNT
instead. This avoids possible future compilation errors further.
For SK_ENABLE_INST_COUNT=0 compilation, add an empty static member
function to all classes that use SK_DECLARE_INST_COUNT and
SK_DECLARE_INST_COUNT_ROOT macros. The function ensures that classes
contain public INHERITED typedef. This member function seems to be
compiled away. This shouĺd ensure that part of the compilation errors
are caught earlier.
Also adds DSK_DECLARE_INST_COUNT to few SkPDFDict subclasses.
R=robertphillips@google.com, richardlin@chromium.org, bsalomon@google.com
Author: kkinnunen@nvidia.com
Review URL: https://codereview.chromium.org/98703002
git-svn-id: http://skia.googlecode.com/svn/trunk@12501 2bbb7eff-a529-9590-31e7-b0007b416f81
The CL adds SkPicture.clone() which produces a thread-safe copy by
creating a shallow copy of the thread-safe data within the picture and
a deep copy of the data that is not (e.g. SkPaint). This implementation
re-flattens the paints when cloning instead of retaining the flattened
paints from the recording process.
Changes were also needed to various classes to ensure thread safety
Review URL: https://codereview.appspot.com/6459105
git-svn-id: http://skia.googlecode.com/svn/trunk@5335 2bbb7eff-a529-9590-31e7-b0007b416f81
