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Kernel: SharedMemory should implement mmap().

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This commit is contained in:
Andreas Kling 2019-05-18 04:17:53 +02:00
parent 237628a7a6
commit a4e48dce77
3 changed files with 8 additions and 6 deletions
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6
Kernel/FileSystem/FileDescriptor.cpp
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@ -324,12 +324,6 @@ KResultOr<Region*> FileDescriptor::mmap(Process& process, LinearAddress laddr, s
if (m_file)
return m_file->mmap(process, laddr, offset, size);
if (is_shared_memory()) {
if (!shared_memory()->vmo())
return KResult(-ENODEV);
return process.allocate_region_with_vmo(laddr, size, *shared_memory()->vmo(), offset, shared_memory()->name(), true, true);
}
if (!is_fsfile())
return KResult(-ENODEV);

7
Kernel/SharedMemory.cpp
View file

@ -88,3 +88,10 @@ int SharedMemory::write(FileDescriptor&, const byte* data, int data_size)
// FIXME: Implement.
ASSERT_NOT_REACHED();
}
KResultOr<Region*> SharedMemory::mmap(Process& process, LinearAddress laddr, size_t offset, size_t size)
{
if (!vmo())
return KResult(-ENODEV);
return process.allocate_region_with_vmo(laddr, size, *vmo(), offset, name(), true, true);
}

1
Kernel/SharedMemory.h
View file

@ -31,6 +31,7 @@ private:
virtual String absolute_path(FileDescriptor&) const override;
virtual const char* class_name() const override { return "SharedMemory"; }
virtual bool is_shared_memory() const override { return true; }
virtual KResultOr<Region*> mmap(Process&, LinearAddress, size_t offset, size_t size) override;
SharedMemory(const String& name, uid_t, gid_t, mode_t);