Fortunately, the gcc port implements the builtins and, from basic
testing, they seem to work.
This is only really useful on Wii U--other platforms have more
robust atomic operations, or aren't using gcc to build.
Add some timing functions so that we can know the time (woo-hoo?)
I use errno here, which worries me a bit. I wouldn't put it past
devkitPPC to have it as a null pointer or something.
Can confirm this makes XMB's clock work, much to @cucholix's delight;
I'm sure ;D
== DETAILS
We're trying to track down the source of crashes when switching cores.
To rule out the HID code, this commit does the following:
- Wraps the library imports in an ifdef
- Wraps the object files in conditionals in Makefile.wiiu
- In wiiu_joypad, calls into the hidpad driver are wrapped in ifdef
== TESTING
This didn't solve the "System memory error" crash I've been experiencing.
But, maybe it will impact the other flavors of crashes others are seeing.
== DETAILS
Starting to implement the I/O handling on the HID driver.
The old implementation basically had a never-ending HIDRead() callback
set up, so that callback N would start the read process for invocation
N+1.
We will take the same approach here; but now that the I/O thread is
happenning on its own core, we should be able to let it run full-
throttle without impacting emulator performance.
Of course, this hinges on the callback actually running on the same
core as the syscall was initiated on.
== TESTING
Can confirm that the read_loop_callback gets invoked on the same core
that the HIDRead() was invoked on.
Thanks for @gblues for finding the strcmp bug.
I've removed the opcode display since it's a bit unsafe - if the
exception handler causes a DSI; Cafe OS will take over and freeze up the
console. This is obviously not a good thing. There are possible
situations where memory is executable and not readable; so this is just
about covering all bases until a better solution can be implemented.
Maybe we can experiment a bit more once this handler isn't being used so
often ;)
Coreinit seems to get special handles, so adding a special case should
make its relative addresses actually become helpful again. Let's just
hope __PPCExit stays at 0x180!
Also added the violating opcode to the DSI message; may have to move it
in case it pushes stuff off the end of the screen.
Untested at time of commit. Hopefully this should make debugging #5357 a
bit easier...
Allow using the Gamepad's touch screen as a RETRO_DEVICE_POINTER.
Methodology could use some work, had to add an extra axis to
joypad in order to get the data transferred into the input driver.
Feel free to change this.
Needs to emulate RETRO_DEVICE_LIGHTGUN to really be useful.
Potential for Wiimote IR in future.
Partially addresses libretro/RetroArch#5294
