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LibGUI+Kernel: Add a GLock class (userspace mutex.)

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It's basically a userspace port of the kernel's Lock class.
Added gettid() and donate() syscalls to support the timeslice donation
feature we already enjoyed in the kernel.
This commit is contained in:
Andreas Kling 2019-03-25 13:03:49 +01:00
parent 108b663618
commit 500df578fe
10 changed files with 176 additions and 12 deletions
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12
LibC/unistd.cpp
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@ -421,4 +421,16 @@ int ftruncate(int fd, off_t length)
ASSERT_NOT_REACHED();
}
int gettid()
{
int rc = syscall(SC_gettid);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int donate(int tid)
{
int rc = syscall(SC_donate, tid);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
}