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39 commits

Author SHA1 Message Date
Nekotekina 5248240e10 atomic.cpp: improvements. 
Reduced static memory amount for waitable atomics.
Allow notifier to skip notifications if wait/notify masks don't overlap.
Improve raw_notify to wake up the thread by its id, add thread_id arg.
Add optional mask argument to notify_one() and notify_all().
 2020-11-05 05:51:43 +03:00
Nekotekina c50233cc92 atomics.cpp: add support for waiting on 128-bit atomics 
Complementarily.
Also refactored to make waiting mask non-template arg.
 2020-10-28 03:47:41 +03:00
Nekotekina 6806e3d5c7 atomic.cpp: implement notify callback 
Notification can be very heavy, especially if we need to wake many threads.
Callback is set for cpu_thread in order to set wait flag accordingly.
 2020-10-27 17:56:19 +03:00
Nekotekina d344701fd5 atomic.cpp: add sparse atomics 
Set alignment as second template argument (typically cache line).
 2020-10-26 01:15:31 +03:00
Nekotekina af6fcb19a8 atomic.cpp: add std primitive fallback for other platforms 
Other platforms = not Windows or Linux.
 2020-10-25 16:45:22 +03:00
Nekotekina 7db77a5580 atomic.cpp: use new thread alerting API (Win8+) 
Win7 will remain using old API (keyed events).
 2020-10-24 19:06:02 +03:00
Nekotekina c479d431a4 atomic.cpp: experimental optimization (Win7+) 
Try non-blocking wake up function first.
 2020-10-24 14:16:32 +03:00
Nekotekina 8628fc441d atomic.cpp: rewrite internals (again) 
Use individual semaphore for each thread.
Unfortunately, limit max thread waiting for single address (60).
If limit is reached, use busy waiting.
 2020-10-24 14:16:32 +03:00
Nekotekina d48d67767a atomic.cpp: integrate callback check in ptr_cmp function 2020-10-24 14:16:32 +03:00
Nekotekina 59d9e7ce98 Revert "Atomics: use WaitOnAddress if available (Win8+)" 
This reverts commit f0fd7e2e19.
 2020-10-21 09:59:08 +03:00
Nekotekina 306593a0c5 Revert "atomic.cpp: fixup for WaitOnAddress path" 
This reverts commit 3b8bce1bed.
 2020-10-21 09:54:22 +03:00
Nekotekina 3b8bce1bed atomic.cpp: fixup for WaitOnAddress path 
Also fix wait quantum.
 2020-10-21 08:18:27 +03:00
Nekotekina f0fd7e2e19 Atomics: use WaitOnAddress if available (Win8+) 2020-10-21 00:22:08 +03:00
Eladash 17c8b34088
atomic.cpp: Optimize sema_get to not always use atomic instruction (#8907) 2020-09-16 22:15:14 +03:00
Eladash fe9c61fe73 atomic.hpp: Fix atomic_storage_futex::raw_notify 2020-09-12 22:11:40 +03:00
Nekotekina 032e7c0491 Replace utils::cntlz{32,64} with std::countl_zero 2020-04-14 16:05:58 +03:00
Nekotekina d0c199d455 Replace utils::cnttz{32,64} with std::countr_{zero,one} 
Make #include <bit> mandatory.
 2020-04-14 16:05:58 +03:00
Nekotekina Aux1 250736ece5 Fix warnings in emucore 2020-03-04 21:23:34 +03:00
Nekotekina ec1ea466fd atomic.hpp: fix typo 2019-10-23 16:01:14 +03:00
Nekotekina b844cd81e8 atomic.hpp: remove <string> dependency 2019-10-20 23:06:17 +03:00
Nekotekina 2dde133e1f atomic.hpp: fix internal resource deallocation 
Also remove debug printf.
 2019-10-20 23:06:17 +03:00
Nekotekina 4d46e66833 atomic.hpp: improve internal data layout 
Put semaphore control variable together in hashtable.
Avoid unnecessary allocation of extents.
 2019-10-20 20:08:09 +03:00
Nekotekina 56b310ebac atomic.hpp: reimplement USE_FUTEX path for Linux 2019-10-20 20:05:36 +03:00
Nekotekina e0f60c5dce atomic.hpp: rewrite collision handling 
Remove "fallback" code path.
Remove USE_FUTEX code path temporarily.
 2019-10-20 18:29:20 +03:00
Nekotekina db7042b986 Restore using keyed events in waitable atomics on Windows 2019-10-18 23:08:00 +03:00
Nekotekina 9710473a2e atomic.hpp: use native semaphores on Windows 
Windows: drop keyed events
Linux: keep using native futex
Implement unused POSIX semaphore path
Implement fallback semaphore with pure std (OSX, BSD, etc)
 2019-09-24 05:01:00 +03:00
Nekotekina 95c939f014 atomic.hpp: fix pointer mask 2019-09-24 05:01:00 +03:00
Nekotekina 74471e8ea3 atomic.hpp: fixup for atomic waiting 2019-09-24 05:01:00 +03:00
Nekotekina e982871ab5 atomic.hpp: increase hashtable capacity 
Double size and ignore 2 lowest bits (effectively x8)
 2019-09-13 15:53:34 +03:00
Nekotekina 2fc8844315 atomic.hpp: add atomic wait mask support 2019-09-13 15:53:34 +03:00
Nekotekina 4504ac2d12 atomic.hpp: implement collision fallback properly 
Should prevent devastating effect of collisions
 2019-09-10 19:25:39 +03:00
Nekotekina 67f31c17d1 atomic.hpp: fix signal saturation logic 
Make sure to notify_all at max signal count.
 2019-09-10 19:25:39 +03:00
Nekotekina a808c2aaf6 atomic.hpp: optimize internal logic 
Move waiter count to highest bits to prevent false futex wakeups.
Test pointer bits properly in notify_all to avoid false wakeups.
 2019-09-10 19:25:39 +03:00
Nekotekina aa99faa85d atomic.hpp: add timeout support 2019-09-10 19:25:39 +03:00
Nekotekina 1668d6ee1b atomic.hpp: implement wait callback interface 
Will be used to wake up threads uniformly.
 2019-09-10 17:43:04 +03:00
Nekotekina 5bd17a44c9 Add fallback implementation for waitable atomics 
May improve perf on OSX/BSD
 2019-08-02 18:37:23 +03:00
Nekotekina c6993d3f1c Change bits of waitable atomics 
Reduce max waiter count to 2^14.
Refactor code to use waiter_mask and signal_mask constants.
 2019-07-29 21:55:59 +03:00
Nekotekina e1db6cef6f Remove ignored bits in waitable atomics 
It was not implemented correctly.
 2019-07-29 21:55:59 +03:00
Nekotekina f63e89f9b4 Implement waitable atomics 
Moved Atomic.h to util/atomic.hpp
List source files in CMakeLists.txt
 2019-07-29 03:04:55 +03:00