Move to a recursive lock inline in the Task. This avoids the need to allocate a lock record and simplifies the code somewhat.
Change Task's OpaquePrivateStorage to compute its size at build time based on the sizes of its components, rather than having it be a fixed size. It appears that the fixed size was intended to be part of the ABI, but that didn't happen and we're free to change this size. We need to expand it slightly when using pthread_mutex as the recursive lock, as pthread_mutex is pretty big. Other recursive locks allow it to shrink slightly.
We don't have a recursive mutex in our Threading support code, so add a RecursiveMutex type.
rdar://113898653
Although the C11 spec says `tss_dtor_t` is `void(*)(void *)`, there
may be modifiers on the former typedef, so we should use it instead
of directly writing the type.
rdar://144220714
Because we're mentioning the type in a macro and it gets used elsewhere,
we need to be explicit that the type is inside threading_impl.
rdar://121122202
We were inadvertently rounding down, which was fine almost 100% of the
time, but on Windows where the timer resolution is only 1ms, it made
the test _very slightly_ flaky because we were asking to wait for
9ms rather than 10ms, then checking we'd waited at least 10ms.
We should explicitly round up, for that reason.
rdar://100236038
There's no guarantee that e.g. pthread_key_t is an integral type. It could
be some kind of struct, or some other thing that isn't valid as a template
argument.
rdar://90776105
Removing thread_get_main() means we don't need a static initializer on
Darwin, which means we can delete Darwin.cpp as well. We can also delete
Nothreads.cpp while we're about it, because there's nothing in that file.
rdar://90776105
Moved all the threading code to one place. Added explicit support for
Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new
implementations of Once for Linux, Pthreads, C11 and Win32.
rdar://90776105
There's no guarantee that e.g. pthread_key_t is an integral type. It could
be some kind of struct, or some other thing that isn't valid as a template
argument.
rdar://90776105
Removing thread_get_main() means we don't need a static initializer on
Darwin, which means we can delete Darwin.cpp as well. We can also delete
Nothreads.cpp while we're about it, because there's nothing in that file.
rdar://90776105
Moved all the threading code to one place. Added explicit support for
Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new
implementations of Once for Linux, Pthreads, C11 and Win32.
rdar://90776105
