* Use Linux timers for sleeps up to 1ms (v3)
The current sleep timer implementation basically offers two variants. Either
wait the specified time exactly with a condition variable (as host) or use a
combination of it with a thread yielding busy loop afterwards (usleep timer).
While the second one is very precise it consumes CPU loops for each wait call
below 50us. Games like Bomberman Ultra spam 30us waits and the emulator hogs
low power CPUs. Switching to host mode reduces CPU consumption but gives a
~50us penalty for each wait call. Thus extending all sleeps by a factor of
more than two.
The following bugfix tries to improve the system timer for Linux by using
Linux native timers for small wait calls below 1ms. This has two effects.
- Host wait setting has much less wait overhead
- usleep wait setting produces lower CPU overhead
Move source files to Emu/GDB.cpp, GDB.h
Remove "WITH_GDB" option, enable GDB Server by default.
Change class name to gdb_thread.
Alias for external access gdb_server.
Change config option name to "GDB Server"
Bind on 127.0.0.1 by default.
* camera_frame = NULL is now checked for CELL_GEM_NO_VIDEO (applied both on start and finish)
* camera_frame = NULL on Start() still starts the update
* Implemented NOT_FINISHED/STARTED
All of those were reversed and hw tested.
* sys_cond fixes
sys_cond_wait is now signaled atomically (regression fix)
Fix a corner case with sys_cond_wait and sys_cond_destroy EBSUY check (waiter count was inaccurate if thread is not the owner of mutex)
Add not about EBUSY corner case (TODO)
* Fix inconcistency in sys_cond_destroy and ETIMEDOUT
.. event at sys_cond_wait regarding waiters count.
Now waiters count is properly connected to the mutex owner actions after ETIMEDOUT in sys_cond_wait.
Move se_t and se_storage to util/endian.hpp
Use single template instead of two specializations.
Add minor optimization for MSVC.
Remove v128 dependency.
Try to enable intrinsics for unaligned data.
Fix minor bug in u16/u32/u64 specializations.
Possibly fixes sys_fs_rmdir and other cases of directory removal.
Make sure the directory with deleted files always becomes empty.
For this purpose, temp files are moved to the root of the device.
This routine:
1) Removes junk backup directories
2) Fixes interrupted save data process in edge case
This case can happen if emu terminates between two atomic renames.
Also use directory renaming technique for delete op.
Also rewrite recreate operation to be part of atomic process.
