A rationale is given in the comments, but even a class 6 or class 10 SD card can handle reads and writes on the order of MB/s, which means a 4KB chunk size is just wasting time in syscalls. This could maybe be fixed with a buffering reader but I don't feel comfortable tweaking libretro-common's VFS to handle that. Instead, I thought it would be good to both remove an ifdef and increase the chunk size to 128KB. For cores with small states this will should make state saving virtually instantaneous, and for cores with large states it should be a 32x speedup.
Auto savestate (and its optional thumbnail) is generated on core unload
(quit, netplay start, etc). This ends up using the task-queue, which in
many cases deadlocks and/or causes a crash due to its asynchronous
nature.
Given that this is a state that must be generated before quiting or
reloading the core, it makes no sense to use the task queue, it should
be a synchronous job like for instance SRAM saving.
This should fix#15248 (tested by @schmurtzm)
* Simplify autosave command function
* Simplify and split save and savestate logic
save.c contains "SRAM" saves and their logic, which uses no task/queue.
assignments for strings longer than 2 chars
- Use strlcpy concatenation instead of strlcat
- Make sure that what remains of iteration of the '_len' variable
for manual char assignment
is done in a safer way so mistakes are less possible
* Rewind during recording isn't visibly busted anymore but it doesn't rewind the replay properly during playback or record, inputs get clobbered; check frame pos/ptr stuff.
* Fix rewinding during movie recording and playback?
* change bsv file suffix to replay, update strings
* add trivial RPLY block to save states
* WIP rerecording support, doesn't load states properly yet--issue with checking identifiers?
* Fixed a type error to get time identifiers working right, ready for testing
* handle case where state without replay data is loaded during replay
* cleanups
* whitespace cleanup
* Cleanups, change replay file format magic, fix logic around future states
* Remove failed future message
* Add play-replay-from-slot command, fix load-state-from-slot to use given slot
* build fixes
* Fix race conditions in emscripten build and incorrect replay state incrementing
* Style fix for single line if
---------
Co-authored-by: Joseph C. Osborn <jcoa2018@pomona.edu>
* Allow for both -e and -R to start a BSV file recording at a state
The key issue is that loading a state takes some time, and the BSV
recording shouldn't start until that's done.
The minimal patch for this would just be a change to runloop.c which
moves movie initialization after entry state loading, throwing in a
task_queue_wait(). This makes for some awkward repeated autoload OSD
messages and doesn't solve the underlying issue.
Most of this change puts BSV recording start/stop into tasks, like
saving and loading are tasks; this was important to centralize BSV
operations a bit more and is the first part of a refactoring towards
more robust input recording. The necessary wait is introduced in the
begin-recording callback.
Co-authored-by: Joseph C. Osborn <jcoa2018@pomona.edu>
if condition variable is signaled, the loop is ran another
last time so we can do a final check/save before stopping the thread.
Old commit courtesy of tobiasjakobi
(snprintf) Try to reduce or simplify snprintf calls, only tend to
use it for processing integers/numbers and avoid it for regular
string concatenation (NOTE: we try to be a bit safer about it to
address earlier cited criticism, although we don't consider concatenating
3 or 4 characters at the end to be insecure)
(msg_hash_to_str) Try to avoid duplicate calls to the same localized
string when we can just cache the results once instead locally
* (3DS) Add bottom screen menu
-> User can save/load state on botom screen with thumbnail.
-> Call a save_state_to_file() when RAM state has data to write a disk.
-> If the bottom screen needs updating, swap the bottom framebuffers.
Add: SAVE/LODE STATE TO RAM
-> This is useful for devices with slow I/O
-> 3DS bottom save state use CMD_EVENT_SAVE_STATE_TO_RAM
-> 3DS bottom load state use CMD_EVENT_LOAD_STATE when RAM state has no data
-> 3DS bottom load state use CMD_EVENT_LOAD_STATE_FROM_RAM when RAM sate has data
* Rewrite path_get_state to retroarch_get_current_savestate_path
* Fix unterminated state_path
