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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/AnonymousFile.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/Memory/AnonymousVMObject.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$anon_create(size_t size, int options)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
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REQUIRE_PROMISE(stdio);
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if (!size)
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return EINVAL;
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if (size % PAGE_SIZE)
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return EINVAL;
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if (size > NumericLimits<ssize_t>::max())
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return EINVAL;
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auto new_fd = TRY(m_fds.allocate());
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auto vmobject = TRY(Memory::AnonymousVMObject::try_create_purgeable_with_size(size, AllocationStrategy::Reserve));
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auto anon_file = TRY(AnonymousFile::try_create(move(vmobject)));
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auto description = TRY(OpenFileDescription::try_create(move(anon_file)));
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description->set_writable(true);
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description->set_readable(true);
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u32 fd_flags = 0;
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if (options & O_CLOEXEC)
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fd_flags |= FD_CLOEXEC;
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m_fds[new_fd.fd].set(move(description), fd_flags);
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return new_fd.fd;
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}
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}
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