Donkey Kong Country Returns is writing new data to some files in /tmp
when loading each level. But the savestate code was opening the files
a second time and reading some old and stale data out.
As of #3798, dolphin now correctly restores that stale data to /tmp,
which broke DKCR (and probally countless other games).
This PR closes all file handles before saving and loading savestates,
which flushes the data out and pervents this issue. (old savestates
are corrupted and will still cause crashes if loaded)
On master, when polling the 1st in-game controller, Dolphin would poll all the 1st local controllers. With the 1st commit, each client waits its turn, which would dramatically increase the lag.
Now with this commit, it even polls all local controllers at once, so it should have even less latency than master in a few setups. Like one player with 3 controllers and the 2nd one with just one controller.
This fixes issues with setups like:
Player 1 uses port 1 and player 2 uses port 3, or
player 1 uses port 2 and player 2 uses port 3, so nobody uses port 1
Also swaps the byte order from RGBA->BGRA to match GL/D3D12, and what
the read handler is expecting.
Depth reads will now return the minimum depth of all samples, instead of
the average of all samples.
Using glMapBufferRange to read back the contents of the SSBO is extremely
slow on NVIDIA drivers. This is more noticeable at higher internal
resolutions. Using glGetBufferSubData instead does not seem to exhibit
this slowdown.
make sure Reset() can’t be run concurrently with AddGCAdapter() or
ResetRumble() (which is called on other threads) which can cause
crashes (issue #9462)
So they share the same emitter, and so they are in the same 128MB range.
This allows us to use B() to jump to the dispatcher.
However, so we have to regenerate them on every cache clear.
EndPlayInput runs on the CPU thread so it can't directly call
UpdateWantDeterminism. PlayController also tries to ChangeDisc
from the CPU Thread which is also invalid. It now just pauses
execution and posts a request to the Host to fix it instead.
The Core itself also did dodgy things like PauseAndLock-ing
from the CPU Thread and SetState from EmuThread which have been
removed.
Fix Frame Advance and FifoPlayer pause/unpause/stop.
CPU::EnableStepping is not atomic but is called from multiple threads
which races and leaves the system in a random state; also instruction
stepping was unstable, m_StepEvent had an almost random value because
of the dual purpose it served which could cause races where CPU::Run
would SingleStep when it was supposed to be sleeping.
FifoPlayer never FinishStateMove()d which was causing it to deadlock.
Rather than partially reimplementing CPU::Run, just use CPUCoreBase
and then call CPU::Run(). More DRY and less likely to have weird bugs
specific to the player (i.e the previous freezing on pause/stop).
Refactor PowerPC::state into CPU since it manages the state of the
CPU Thread which is controlled by CPU, not PowerPC. This simplifies
the architecture somewhat and eliminates races that can be caused by
calling PowerPC state functions directly instead of using CPU's
(because they bypassed the EnableStepping lock).
Pierre Bourdon