[jit, exception] use shared mutex to reduce thread contention of cached code blocks in fastmem trap handler (#320)

ankerl::unordered_dense::map will provide better lookup times, theoretically.
fastmem trap handler usually had mutex contention for non-linkable series of blocks (block linking failures); so just use shared_mutex

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/320
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

0 files changed, 0 insertions, 0 deletions