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Kernel: Use TRY() in FileDescription

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This commit is contained in:
Andreas Kling 2021-09-05 14:43:51 +02:00
parent f2f5df793a
commit b0f2acbd91
Notes: sideshowbarker 2024-07-18 04:43:12 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/b0f2acbd91f
1 changed files with 15 additions and 26 deletions
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41
Kernel/FileSystem/FileDescription.cpp
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@ -26,13 +26,8 @@ namespace Kernel {
KResultOr<NonnullRefPtr<FileDescription>> FileDescription::try_create(Custody& custody)
{
auto inode_file = InodeFile::create(custody.inode());
if (inode_file.is_error())
return inode_file.error();
auto description = adopt_ref_if_nonnull(new (nothrow) FileDescription(*inode_file.release_value()));
if (!description)
return ENOMEM;
auto inode_file = TRY(InodeFile::create(custody.inode()));
auto description = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) FileDescription(move(inode_file))));
description->m_custody = custody;
auto result = description->attach();
@ -40,20 +35,18 @@ KResultOr<NonnullRefPtr<FileDescription>> FileDescription::try_create(Custody& c
dbgln_if(FILEDESCRIPTION_DEBUG, "Failed to create file description for custody: {}", result);
return result;
}
return description.release_nonnull();
return description;
}
KResultOr<NonnullRefPtr<FileDescription>> FileDescription::try_create(File& file)
{
auto description = adopt_ref_if_nonnull(new (nothrow) FileDescription(file));
if (!description)
return ENOMEM;
auto description = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) FileDescription(file)));
auto result = description->attach();
if (result.is_error()) {
dbgln_if(FILEDESCRIPTION_DEBUG, "Failed to create file description for file: {}", result);
return result;
}
return description.release_nonnull();
return description;
}
FileDescription::FileDescription(File& file)
@ -179,13 +172,11 @@ KResultOr<size_t> FileDescription::read(UserOrKernelBuffer& buffer, size_t count
MutexLocker locker(m_lock);
if (Checked<off_t>::addition_would_overflow(m_current_offset, count))
return EOVERFLOW;
auto nread_or_error = m_file->read(*this, offset(), buffer, count);
if (!nread_or_error.is_error()) {
if (m_file->is_seekable())
m_current_offset += nread_or_error.value();
evaluate_block_conditions();
}
return nread_or_error;
auto nread = TRY(m_file->read(*this, offset(), buffer, count));
if (m_file->is_seekable())
m_current_offset += nread;
evaluate_block_conditions();
return nread;
}
KResultOr<size_t> FileDescription::write(const UserOrKernelBuffer& data, size_t size)
@ -193,13 +184,11 @@ KResultOr<size_t> FileDescription::write(const UserOrKernelBuffer& data, size_t
MutexLocker locker(m_lock);
if (Checked<off_t>::addition_would_overflow(m_current_offset, size))
return EOVERFLOW;
auto nwritten_or_error = m_file->write(*this, offset(), data, size);
if (!nwritten_or_error.is_error()) {
if (m_file->is_seekable())
m_current_offset += nwritten_or_error.value();
evaluate_block_conditions();
}
return nwritten_or_error;
auto nwritten = TRY(m_file->write(*this, offset(), data, size));
if (m_file->is_seekable())
m_current_offset += nwritten;
evaluate_block_conditions();
return nwritten;
}
bool FileDescription::can_write() const