This change essentially removes mp_thread_self() and instead add
mp_thread_id to track threads and have ability to query current thread
id during runtime.
This will be useful for upcoming win32 implementation, where accessing
thread handle is different than on pthreads. Greatly reduces complexity.
Otherweis locked map of tid <-> handle is required which is completely
unnecessary for all mpv use-cases.
Note that this is the mp_thread_id, not to confuse with system tid. For
example on threads-posix implementation it is simply pthread_t.
CLOCK_MONOTONIC_RAW is linux-specific (macOS later supported it but it
has its own timer code) and not neccessarily available everywhere like
on BSDs. It makes sense to prefer it because mpv does a lot of
measurements at small intervals (e.g. every frame) so theoretically it
should be more accurate. However if the OS doesn't have it, fallback to
CLOCK_MONOTONIC instead which is almost exactly the same and very widely
supported across unix-like systems. This clock is technically optional
according to POSIX, but any half-decent OS supports it anyway (sorry
Solaris users). As a benefit, we now know that the clock from mp_time is
always monotonic.
I'd like some names to be more descriptive, but to work with 15 chars
limit we have to make some sacrifice.
Also because of the limit, remove the `mpv/` prefix and prioritize
actuall thread name.
This fixes warnings generated for `-Wunused-result` when mpv is built
with `-O1 -D_FORTIFY_SOURCE=1` or higher on clang since read/write
functions are declared with the `warn_unused_result` attribute.
Cast to void to avoid these warnings.
macOS didn't support clock_gettime until 10.12 which was released
roughly 7 years ago. Since we're breaking support for ancient OSes
anyway, we might as well break some old macOS versions for fun. This
makes 10.12 the minimum supported macOS version.
since i was going to fix the include order of stdatomic, might as well
sort the surrouding includes in accordance with the project's coding
style.
some headers can sometime require specific include order. standard
library headers usually don't. but mpv might "hack into" the standard
headers (e.g pthreads) so that complicates things a bit more.
hopefully nothing breaks. if it does, the style guide is to blame.
replace it with <stdatomic.h> and replace the mp_atomic_* typedefs with
explicit _Atomic qualified types.
also add missing config.h includes on some files.
Also apply some fixes to pthread_cond_timedwait while we're at it.
Note that by using GetSystemTimePreciseAsFileTime here we lose support
for Windows 7. This is considered acceptable.
This reverts commit 318b5471a1.
While it may work, changing these two functions in violation of their documented
behaviour for the sake of a shortcut is a hack that will spell disaster sooner or later.
This is a partial revert since the commit in question also contained a hidden
bugfix where it swapped the calculation order for time_rel.
With the previous series of commits, all internal usage has been
replaced by the nanosecond functions. There's not really any point in
keeping these around anymore plus there are macros for unit conversions
now so we can just axe them. It's worth noting that mpv_get_time_us()
obviously still needs to work for API reasons, but we can just divide
mp_time_ns() by 1000 to get the same thing.
There's a lot of wild 1e6, 1000, etc. lying around in the code. A macro
is much easier to read and understand at a glance. Add some helpers for
this. We don't need to convert everything now but there's some simple
things that can be done so they are included in this commit.
add support for vulkan through metal and a translation layer like
MoltenVK. also add the possibility to use different render timing modes
for testing.
i still consider this experimental atm.
there are currently some silly data-races in the stop/cont sighandler
due to the fact that the signal handler might get invoked in a different
thread.
this changes those sighandlers to a pipe-based approach similar to the
existing "quit" sighandler.
tio_orig and tio_orig_set are being touched inside of signal handler
which might be invoked from another thread - which makes this a data
race.
there's no real reason to set tio_orig inside of do_activate_getch2()
which is registered as a signal handler. just set it once, in
terminal_init(), before any signal handlers come in play.
this also allows removing the tio_orig_set variable completely.
do_deactivate_getch2() touches some global variables which *might have*
been fine if the terminal thread was the one that received the signal
but AFAIK which thread will handle the signal is not well defined.
in my case, when quitting mpv with CTRL+C the main thread receives the
signal rather than the terminal thread and touches those globals without
synchronization. caught by ThreadSanitizer.
the solution is to move the do_deactivate_getch2() call outside of the
signal handler.
Allows higher resolution sleeps than Sleep which has milliseconds
resolution. In practice Windows kernel does not really go below 0.5ms,
but we don't have to limit ourselves on API side of things and do the
best we can.
Linux and macOS already use nanosecond resolution for their sleep
functions. It was just being converted from microseconds before. Since
we have mp_time_ns now, go ahead and bump the precision here. The timer
for windows uses some timeBeginPeriod thing which I'm not sure what it
does really but whatever just convert the units to ms like they were
doing before. There's really no reason to keep the mp_sleep_us helper
around. A multiplication by 1000 is trivial and underlying OS clocks
have nanosecond precision.
On linux, several platforms poll for events over a fd. This has ms
accuracy, but mpv's timer is in ns now so lots of precision is lost. We
can use an mp_poll wrapper to use ppoll instead which takes a timespec
directly with nanosecond precision. On systems without ppoll this falls
back to old poll behavior. On wayland, we don't actually use this
because ppoll completely messes up the event loop for some unknown
reason.
Originally, this was added as purely a shim for macOS. However since we
want to do high resolution polling which is not neccesarily available on
all platforms, making this a generic wrapper for poll functions is
useful so rename it.
Thomas Weißschuh
Kacper Michajłow
Guido Cella
Dudemanguy
NRK
llyyr
sfan5
der richter