See code commentary for an explanation.
Add an additional constructor to allow `log_linux.cc` to compile with
GPR_PTHREAD_TLS. Without it:
```
../../third_party/grpc/src/core/lib/gpr/log_linux.cc:78:33: error: no viable conversion from 'int' to 'grpc_core::PthreadTlsImpl<long>'
static GPR_THREAD_LOCAL(long) tid = 0;
^ ~
../../third_party/grpc/src/core/lib/gpr/tls.h:64:3: note: candidate constructor not viable: no known conversion from 'int' to 'const grpc_core::PthreadTlsImpl<long> &' for 1st argument
PthreadTlsImpl(const PthreadTlsImpl&) = delete;
^
1 error generated.
```
* Implement type safety for TLS
This is mostly free when compiler support is available, but requires
careful templating when implemented using pthread.
Significantly slimmed the tls.h interface; it now only defines the "TLS
keyword" for each supported compiler, delegating enforcement of correct
usage (i.e. must be static) to the compiler itself.
Implemented implicit conversion for the pthread wrapper so it can be
used (mostly) the same as native support. Notable exception to this is
that static_cast<void*> is needed when printing a pointer stored in TLS
as %p.
* Use GPR_THREAD_LOCAL macros consistently
This exposes a bug in clang, reported upstream as
https://bugs.llvm.org/show_bug.cgi?id=51368.
The clang bug is mitigated using a fake scoped lock; that allows the
current code to compile while also serving as a change detector to
prevent it from going stale; if the compiler bug is fixed, the compiler
will see an overlapping locking requirement, and reject this code, which
will prompt a human being to remove this workaround.
It is not possible for such a function to be implemented in a way that
is understood by annotalysis. Mark it deprecated and replace instances
of its use with direct mutex/condvar usage.
Add a bunch of missing thread safety annotations while I'm here.
* LB policy API improvements
* clang-format
* fix build
* a bit more cleanup
* use absl::variant<> for pick result
* fix retry_lb_drop test
* clang-format
* fix grpclb_end2end_test
* fix xds_end2end_test
* try to make variant code a bit cleaner
* clang-format
* fix memory leak
* fix build
* clang-format
* fix error refcount bug
* remove PickResult factory functions
* clang-format
* add ctors to structs
* clang-format
* fix clang-tidy
* update comments
* move LB recv_trailing_metadata callback instead of copying it
* use Match() instead of providing PickResult::Handle()
* don't use Match() for now, since it breaks lock annotations
* update retry_lb_fail test
* Tighten the error tolerance requirement by 10x
* Make it 5 sigma instead of 4.5
* Rewrap comments
* Loosen the max concurrent requests in certain test cases
* De-experimentalize callback API
* Make FromServerContext based on ServerContextBase
* Fix lambda
* Fix headers
* De-experimentalize tests
* clang-format
* Fix consistency checks
* wip
* Fix const-ness of callback client read RPC requests
* Fix golden file
* Give full route_guide callback client example with Hold etc
* Complete example route-guide server
* De-experimentalize test services
* Omit unneeded using
* Remove some uses of non-experimental macro from test
* clang-format examples
* De-experimentalize async stub calls
* Remove experimental namespace use in qps, ubms
* De-experimentalize alarms, generic stubs, and context allocator
* De-experimentalize SetContextAllocator
* clang-format
* Fix conflicts
* Leave obsolete API in place until users can be migrated
* Ring hash implementation
* Fixing an error caught during import:
ipv6 addresses need small modifications when creating the ring entry.
* fixing an error
* removing debugs
* Remove unnecssary hashing
* small cleanup
* Revert "Revert "Expose trailers-only response status through C++ callback API (#26249)" (#26363)"
This reverts commit 05c3b30ea0.
* Move the trailers_only check from ClientContext to ClientReactor
* Remove unneeded change in client_context.cc
* Expose trailers-only response status through callback API
* Fix change-detector test
* Address reviewer comment about trailers_only headers
* Add TODO requested by markdroth
* Move variable in struct to improve space efficiency
* Don't instantiate ExecCtx in channel_args destructor unless needed
* Resolve and test race between OnReadDone(ok=false) and IsCancelled
* Fix retry case
* Fix health check case
* Address reviewer comments.
* ADD TODO requested by markdroth
* Refactoring EdsResourceArgs::Locality to have a vector of Endpoints:
port, health_status, and lb_weight.
As well, Adding RpcOption to WaitForBackend()
* Update WaitForBackend
* Modified WaitForBackend default param
* reuse SeenBackend
* Code review comments
* refactor WaitForAllBackend parameter list
* Fixing tests to ensure they are more strict;
Fixing test code according to code review comments.
* Fixing code review suggestions
* Increasing timeout for StressTest
* Adding suffix for stats handling to gRPC
* Fixing typo
* Fixing codegen, adding tests
* Fixing test failures
* Adding nullptr default in StubOptions
* Updating golden test file
* Replacing std::make_unique with absl::make_unique for pre-C++14 compatibility
* Fixing clang format errors
* Reuse stub options for generic stubs
* Cleaning up compiler warnings in GenericStub
Tamir Duberstein
Yash Tibrewal
Mark D. Roth
Tamir Duberstein
donnadionne
Craig Tiller
Alisha Nanda
Lidi Zheng
Vijay Pai
mkruskal-google
Esun Kim