Replace std::mutex/condition_variable with sem_wait/sem_post for thread
suspension, as WaitSuspended is called from the SIGRTMIN signal handler
where pthread_mutex_lock is not async-signal-safe.
This call was failing since SCHED_FIFO doesn't support negative priorities, but only positive ones, see third paragraph of scheduling policies: https://man7.org/linux/man-pages/man7/sched.7.html.
Additionally Linux do provice up to 99 levels, but I've limited myself to the required UNIX standard of 32, and split the priority levels evenly from that.
I've also added a couple of rows to debug additional issues in the future like this.
- Added some fixes introduced by RodoMa92 in PR198
- Lack of AVX2 extension (should be done differently in the future)
- Disable deprecated-volatile warning
- Added missing override in posix EventInfo, ImGui notification class and XContent class
- Removed not used XAudio2.h include in XMP
- Fixed missing switch-case in XObject
- Added fugly template in native_list.h
- Fixed multiple smaller issues
Since timer_delete does not clean up already queued signals, signal info
data needs to be retained after timer deletion and object destruction in
order to circumvent use-after-free bugs.
- Never use `cond_.notify_one()` because it may wake a thread that is
unrelated to the signalled wait handle, resulting in a lost wake and
possible deadlock. Wait conditions are to be checked by the threads
themselves.
- Refactor and simplify `WaitMultiple`
- Test was failing on Linux 5.11 and GLIBC 2.33
- `timer_t(0)` is a valid handle, so a `valid_` flag was added to guard
destruction
- Similar behaviour on Windows was fixed as well. The invalid values for
`HANDLE` are API dependent.
Add suspend count to thread implementation.
Increment suspend count on suspend and decrement on resume.
Wait on suspend count to be decremented to 0.
Return suspend count on suspend and on resume before incr/decr.
Fix naming of resume suspend count to make clear that suspend count is
before incr/decr.
Add test.
Add thread local bool for alertable state.
Use real-time event interrupt to run callback.
Fix sleep duration from miliseconds (microseconds / 1000) to seconds in sleep
command.
Add note for future implementation.
Ignore real-time event 37 in .gdbinit which is used to signal callback.
Test AlertableSleep
Test Thread QueueUserCallback.
TODO: Test alerted wait result when using IO functions.
Use real-time event interrupt to communicate suspend in timely manner.
Use conditional_variable to implement suspend wait and resume trigger.
Ignore real-time event 36 in .gdbinit which is used to signal suspend.
Test suspending threads.
Test Manual Reset and Synchronization timers single threaded.
Test Cancelling timers.
Test WaitMultiple.
Ignore real-time event 35 in .gdbinit which is used to signal timer.
Callbacks don't seem to be called so testing them is difficult.
Keep track of recursive locks with owner and count of locks.
Only allow recursive locks from same thread and increment count.
Only allow first locks from when count is zero.
Test acquiring and releasing mutant on same and on different threads.
Test Release return values.
Test WaitAll and WaitAny.
Test acquiring and releasing semaphores on same and on different threads.
Test previous_count values.
Test WaitAll and WaitAny.
Add tests for invalid semaphore creation parameters but disactivated as
they do not pass on any platform. These should be enabled and the
implementations fixed to match documentation.
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
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.
