Add PosixConditionBase as base class for Waitables to use common
primitives mutex and conditional variable
Add abstract signaled() and post_execution() to use single WaitMultiple
implementation.
Remove file-descriptor specific wait implementation to PosixFdHandle class
which breaks on waits of non-fd handles.
Replace with PosixConditionHandle and extend to support auto reset and
initial values.
Simplify mutex and conditional variable use with stdlib versions which
wrap these primitives but provide better C++ interface.
Test Event and Reset
Remove atomic boolean in fence. Variable signaled_ is already protected
by mutex.
Remove wait loop with single predicate wait protected with mutex.
Add Fence Signal and Wait tests
Test signaling without waiting.
Test signaling before waiting.
Test signaling twice before waiting.
Test synchronizing threads with fence.
Few REQUIRES were used to test as there are no return codes.
A failing test may hang indefinitely or cause a segfault which would still
register as a fail.
Implement HighResolutionTimer for Posix by using native timers.
Callbacks are triggered with realtime interrupts if they are supported.
Create an enum to track user-defined interrupts as well as an initializer and
handler to register these interrupts per thread.
Add test cases for timers for both single and multiple.
Fix Sleep function to continue sleeping if interrupted by system.
Add local .gdbinit to ignore signal 34 which is used by high res timer
Add Sleep Test for 50ms.
Fix Sleep under linux that was using microseconds as nanoseconds.
Factor timespec creation to template function using div/mod and nanoseconds
from duration cast.
Test logical_processor_count() 3 times to test static return value stays
correct.
Run EnableAffinityConfiguration(). No asserts possible.
Test setting thread id, test using uint32_t max to reset.
Test setting thread name. No asserts possible.
Test running MaybeYield(). No obvious more complex test case.
Test running SyncMemory(). No obvious more complex test case.
Sandy Carter