When run on cooperative threads, we need to notify the threading system
when we're going to block (in any way, sleep or spin) so that it doesn't
wake that thread up expecting it to make forward progress.
This should cover SkOnce, SkSpinlock, SkSemaphore, and by extension
SkMutex. Not sure if there are others to hit, but really the only way
to find out is by deadlocked stack traces. This CL (obviously?) does
nothing to mark synchronization primitives used by Skia's dependencies,
and in general I don't think we can do anything about them.
See cr/275261423 for more background and discussion. It's not clear to
me that marking these symbols as weak is necessary, so I figured I'd
just try not doing that and seeing what breaks. I can always follow up
with weak symbols if proven necessary.
Bug: skia:9577
Change-Id: I2c03fe92c58ad506dd8a68bdc90a09b28f965149
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/251221
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Remove the SkBaseMutex (and SkBaseSemaphore). This allows all the thread
annotation machinery to work.
Change-Id: I2da420ec3165ccbcd90c474c0b62bfef42df2a53
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/221340
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Current strategy: everything from the top
Things to look at first are the manual changes:
- added tools/rewrite_includes.py
- removed -Idirectives from BUILD.gn
- various compile.sh simplifications
- tweak tools/embed_resources.py
- update gn/find_headers.py to write paths from the top
- update gn/gn_to_bp.py SkUserConfig.h layout
so that #include "include/config/SkUserConfig.h" always
gets the header we want.
No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
This reverts commit 3b347232bc.
Reason for revert: tree done gone red.
Original change's description:
> SkMath takes some functions from from SkTypes
>
> Moved to include/core/SkMath.h: Sk{Is|}Align{2|4|8|Ptr}, SkLeftShift,
> SkAbs{32|}, SkM{ax|in}32 SkTM{in|ax}, SkTClamp, SkFastMin32, SkTPin.
>
> Change-Id: Ibcc07be0fc3677731048e7cc86006e7aa493cb92
> Reviewed-on: https://skia-review.googlesource.com/133381
> Auto-Submit: Hal Canary <halcanary@google.com>
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Hal Canary <halcanary@google.com>
TBR=mtklein@google.com,halcanary@google.com,bungeman@google.com,reed@google.com
Change-Id: I44073cf397e2a3a6a941a90f0aa63c6396d4c742
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/152587
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Change-Id: I14fc03fcb73bad61daed7c4cd3ed12bfae6b1217
Reviewed-on: https://skia-review.googlesource.com/8880
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
Refactoring to refamiliarize myself with SkTaskGroup and SkThreadPool.
This adds an SkExecutor interface to describe how we use SkThreadPool,
with a global setter and getter for a default instance. Then I rewrote
SkTaskGroup to work with any executor, the global default by default.
I also think I've made the SkTaskGroup::wait() borrow logic clearer
with the addition of SkSemaphore::try_wait(). This lets me keep the
semaphore count and actual count of work in perfect sync.
Change-Id: I6bbdfaeb0e2c3a43daff6192d34bc4a3f7210178
Reviewed-on: https://skia-review.googlesource.com/8836
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
This implementation improves performance of SkMutex acquire / release pair from 42ns -> 13 ns.
SkSharedMutex and SkSpinlock have the same performance.
It also removes specialized windows and linux/mac code.
BUG=skia:
Review URL: https://codereview.chromium.org/1359733002
