51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
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#pragma once
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#include <Kernel/VM/MemoryManager.h>
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#include <AK/OwnPtr.h>
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struct SharedBuffer {
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private:
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struct Reference {
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Reference(pid_t pid)
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: pid(pid)
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{
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}
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pid_t pid;
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unsigned count { 1 };
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Region* region { nullptr };
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};
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public:
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SharedBuffer(int id, int size)
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: m_shared_buffer_id(id)
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, m_vmo(VMObject::create_anonymous(size))
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{
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#ifdef SHARED_BUFFER_DEBUG
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dbgprintf("Created shared buffer %d of size %d\n", m_shared_buffer_id, size);
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#endif
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}
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~SharedBuffer()
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{
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#ifdef SHARED_BUFFER_DEBUG
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dbgprintf("Destroyed shared buffer %d of size %d\n", m_shared_buffer_id, size());
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#endif
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}
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bool is_shared_with(pid_t peer_pid);
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void* get_address(Process& process);
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void share_with(pid_t peer_pid);
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void release(Process& process);
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void disown(pid_t pid);
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size_t size() const { return m_vmo->size(); }
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void destroy_if_unused();
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void seal();
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int m_shared_buffer_id { -1 };
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bool m_writable { true };
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NonnullRefPtr<VMObject> m_vmo;
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Vector<Reference, 2> m_refs;
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};
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Lockable<HashMap<int, OwnPtr<SharedBuffer>>>& shared_buffers();
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