Pretty much all of the source files contain the following:
namespace IOS
{
namespace HLE
{
namespace <name>
{
// actual code here
} // namespace <name>
} // namespace HLE
} // namespace IOS
which is really verbose boilerplate, because most of the files inside
of Core/IOS are for IOS HLE.
This commit replaces that with a more concise `namespace IOS::HLE`
or `namespace IOS::HLE::(name)`.
This is the large change in the branch.
This lets us use either the host filesystem or (in the future) a NAND
image exactly the same way, and make sure the IPC emulation code
behaves identically. Less duplicated code.
Note that "FileIO" and "FS" were merged, because it actually doesn't
make a lot of sense to split them: IOS handles requests for both
/dev/fs and files in the same resource manager, and as it turns out,
/dev/fs commands can *also* be sent to non /dev/fs file descriptors!
If we kept /dev/fs and files split, there would be no way to
emulate that correctly. I'm not aware of anything that does that (yet?)
but I think it's important to be correct.
This commit changes devices to always return IPCCommandResult rather
than just a return code for Open() and Close() in order to be able
to better emulate reply timing.
In hindsight, I should have considered we would want to emulate
timing when I cleaned up the device interface, but alas.
This rectifies that mistake.
This changes the main IOS code (roughly the equivalent of the kernel)
to a class instead of being a set of free functions + tons of static
variables.
The reason for this change is that keeping tons of static variables
like that prevents us from making an IOS instance and reusing IOS
code easily.
Converting the IOS code to a class also allows us to mostly decouple
IOS from the PPC emulation.
The more interesting changes are in Core/IOS/IOS. Everything else is
mostly just boring stuff required by this change...
* Because the devices themselves call back to the main IOS code
for various things (getting the current version, replying to a
request, and other syscall-like functions), just like processes in
IOS call kernel syscalls, we have to pass a reference to the kernel
to anything that uses IOS syscalls.
* Change DoState to save device names instead of device IDs to simplify
AddDevice() and get rid of an ugly static count.
* Change ES_Launch's ack to be sent at IOS boot, now that we can do
this properly.
This changes the IOS code to handle ES contexts inside of ES, instead
of leaking out implementation details into the IPC request dispatcher.
The intent is to clarify what's shared between every single ES context,
and what is specific to an ES context. (Not much.) This should reduce
the number of static members in the ES class.
The other changes are there just because we now keep track of the
IPC FD inside of ES.
Future plans:
* After the WAD direct launch hack is dropped, the title context
will be made a class member.
* Have proper function prototypes, instead of having every single one
of them take ioctlv requests. This will allow reusing IOS code in
other parts of the Dolphin codebase without having to construct
ioctlv requests.
This keeps all of the return codes in the same place and exposed
publicly (as they are not internal to ES).
I have also added proper IOSC error codes and renamed some codes
for more consistency. (Unix ones have an E prefix, others do not.)
IPC_HLE is actually IOS HLE. The actual IPC emulation is not in
IPC_HLE, but in HW/WII_IPC.cpp. So calling IPC_HLE IOS is more
accurate. (If IOS LLE gets ever implemented, it'll likely be at
a lower level -- Starlet LLE.)
This also totally gets rid of the IPC_HLE prefix in file names, and
moves some source files to their own subdirectories to make the file
hierarchy cleaner.
We're going to get ~14 additional source files with the USB PR,
and this is really needed to keep things from becoming a total pain.
