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Kernel: Some futex improvements
This adds support for FUTEX_WAKE_OP, FUTEX_WAIT_BITSET, FUTEX_WAKE_BITSET, FUTEX_REQUEUE, and FUTEX_CMP_REQUEUE, as well well as global and private futex and absolute/relative timeouts against the appropriate clock. This also changes the implementation so that kernel resources are only used when a thread is blocked on a futex. Global futexes are implemented as offsets in VMObjects, so that different processes can share a futex against the same VMObject despite potentially being mapped at different virtual addresses.
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23 changed files with 928 additions and 63 deletions
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@ -192,6 +192,11 @@ public:
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return m_offset_in_vmobject;
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}
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size_t offset_in_vmobject_from_vaddr(VirtualAddress vaddr) const
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{
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return m_offset_in_vmobject + vaddr.get() - this->vaddr().get();
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}
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size_t amount_resident() const;
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size_t amount_shared() const;
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size_t amount_dirty() const;
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