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Kernel: Convert try_make_ref_counted to use ErrorOr

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This allows more ergonomic memory allocation failure related error
checking using the TRY macro.
This commit is contained in:
Idan Horowitz 2022-02-03 16:43:34 +02:00 • committed by Andreas Kling
parent 8289727fac
commit a65bbbdb71
4 changed files with 14 additions and 15 deletions
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8
Kernel/Library/ThreadSafeRefPtr.h
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@ -486,16 +486,16 @@ inline RefPtr<T> adopt_ref_if_nonnull(T* object)
}
template<typename T, class... Args>
requires(IsConstructible<T, Args...>) inline RefPtr<T> try_make_ref_counted(Args&&... args)
requires(IsConstructible<T, Args...>) inline ErrorOr<NonnullRefPtr<T>> try_make_ref_counted(Args&&... args)
{
return adopt_ref_if_nonnull(new (nothrow) T(forward<Args>(args)...));
return adopt_nonnull_ref_or_enomem(new (nothrow) T(forward<Args>(args)...));
}
// FIXME: Remove once P0960R3 is available in Clang.
template<typename T, class... Args>
inline RefPtr<T> try_make_ref_counted(Args&&... args)
inline ErrorOr<NonnullRefPtr<T>> try_make_ref_counted(Args&&... args)
{
return adopt_ref_if_nonnull(new (nothrow) T { forward<Args>(args)... });
return adopt_nonnull_ref_or_enomem(new (nothrow) T { forward<Args>(args)... });
}
template<typename T>

6
Kernel/Thread.cpp
View file

@ -45,12 +45,10 @@ ErrorOr<NonnullRefPtr<Thread>> Thread::try_create(NonnullRefPtr<Process> process
auto kernel_stack_region = TRY(MM.allocate_kernel_region(default_kernel_stack_size, {}, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow));
kernel_stack_region->set_stack(true);
auto block_timer = try_make_ref_counted<Timer>();
if (!block_timer)
return ENOMEM;
auto block_timer = TRY(try_make_ref_counted<Timer>());
auto name = TRY(KString::try_create(process->name()));
return adopt_nonnull_ref_or_enomem(new (nothrow) Thread(move(process), move(kernel_stack_region), block_timer.release_nonnull(), move(name)));
return adopt_nonnull_ref_or_enomem(new (nothrow) Thread(move(process), move(kernel_stack_region), move(block_timer), move(name)));
}
Thread::Thread(NonnullRefPtr<Process> process, NonnullOwnPtr<Memory::Region> kernel_stack_region, NonnullRefPtr<Timer> block_timer, NonnullOwnPtr<KString> name)