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Kernel+LibC: Remove sys$donate()

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This was an old SerenityOS-specific syscall for donating the remainder
of the calling thread's time-slice to another thread within the same
process.

Now that Threading::Lock uses a pthread_mutex_t internally, we no
longer need this syscall, which allows us to get rid of a surprising
amount of unnecessary scheduler logic. :^)
This commit is contained in:
Andreas Kling 2021-07-05 23:07:18 +02:00
parent c40780d404
commit 565796ae4e
9 changed files with 2 additions and 127 deletions
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14
Kernel/Syscalls/sched.cpp
View file

@ -15,20 +15,6 @@ KResultOr<FlatPtr> Process::sys$yield()
return 0;
}
KResultOr<FlatPtr> Process::sys$donate(pid_t tid)
{
REQUIRE_PROMISE(stdio);
if (tid < 0)
return EINVAL;
ScopedCritical critical;
auto thread = Thread::from_tid(tid);
if (!thread || thread->pid() != pid())
return ESRCH;
Thread::current()->donate_without_holding_big_lock(thread, "sys$donate");
return 0;
}
KResultOr<FlatPtr> Process::sys$sched_setparam(int pid, Userspace<const struct sched_param*> user_param)
{
REQUIRE_PROMISE(proc);