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AK: Make MappedFile store why it is invalid

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This makes AK::MappedFile save the errno either open() or mmap() failed
with.
This commit is contained in:
AnotherTest 2020-07-22 19:49:47 +04:30 • committed by Andreas Kling
parent d04c833002
commit 6131417904
2 changed files with 12 additions and 2 deletions
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9
AK/MappedFile.h
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@ -33,8 +33,9 @@ namespace AK {
class MappedFile {
AK_MAKE_NONCOPYABLE(MappedFile);
public:
MappedFile() {}
MappedFile() { }
explicit MappedFile(const StringView& file_name);
MappedFile(MappedFile&&);
~MappedFile();
@ -42,6 +43,11 @@ public:
MappedFile& operator=(MappedFile&&);
bool is_valid() const { return m_map != (void*)-1; }
int errno_if_invalid() const
{
ASSERT(!is_valid());
return m_errno;
}
void unmap();
void* data() { return m_map; }
@ -51,6 +57,7 @@ public:
private:
size_t m_size { 0 };
void* m_map { (void*)-1 };
int m_errno { 0 };
};
}