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AK: Simplify constructors and conversions from nullptr_t

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Problem:
- Many constructors are defined as `{}` rather than using the ` =
  default` compiler-provided constructor.
- Some types provide an implicit conversion operator from `nullptr_t`
  instead of requiring the caller to default construct. This violates
  the C++ Core Guidelines suggestion to declare single-argument
  constructors explicit
  (https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c46-by-default-declare-single-argument-constructors-explicit).

Solution:
- Change default constructors to use the compiler-provided default
  constructor.
- Remove implicit conversion operators from `nullptr_t` and change
  usage to enforce type consistency without conversion.
This commit is contained in:
Lenny Maiorani 2021-01-10 16:29:28 -07:00 • committed by Andreas Kling
parent 9dc44bf8c4
commit e6f907a155
105 changed files with 300 additions and 244 deletions
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4
Kernel/Thread.cpp
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@ -316,13 +316,13 @@ void Thread::relock_process(LockMode previous_locked, u32 lock_count_to_restore)
auto Thread::sleep(clockid_t clock_id, const timespec& duration, timespec* remaining_time) -> BlockResult
{
ASSERT(state() == Thread::Running);
return Thread::current()->block<Thread::SleepBlocker>(nullptr, Thread::BlockTimeout(false, &duration, nullptr, clock_id), remaining_time);
return Thread::current()->block<Thread::SleepBlocker>({}, Thread::BlockTimeout(false, &duration, nullptr, clock_id), remaining_time);
}
auto Thread::sleep_until(clockid_t clock_id, const timespec& deadline) -> BlockResult
{
ASSERT(state() == Thread::Running);
return Thread::current()->block<Thread::SleepBlocker>(nullptr, Thread::BlockTimeout(true, &deadline, nullptr, clock_id));
return Thread::current()->block<Thread::SleepBlocker>({}, Thread::BlockTimeout(true, &deadline, nullptr, clock_id));
}
const char* Thread::state_string() const