59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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namespace ipc {
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namespace shm {
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using id_t = void*;
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enum : unsigned {
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create = 0x01,
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open = 0x02
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};
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extern id_t acquire(char const * name, std::size_t size, unsigned mode = create | open);
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extern void * get_mem(id_t id, std::size_t * size);
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extern std::int32_t release(id_t id);
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extern void remove (id_t id);
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extern void remove (char const * name);
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extern std::int32_t get_ref(id_t id);
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extern void sub_ref(id_t id);
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class handle {
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public:
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handle();
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handle(char const * name, std::size_t size, unsigned mode = create | open);
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handle(handle&& rhs);
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~handle();
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void swap(handle& rhs);
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handle& operator=(handle rhs);
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bool valid() const noexcept;
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std::size_t size () const noexcept;
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char const * name () const noexcept;
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std::int32_t ref() const noexcept;
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void sub_ref() noexcept;
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bool acquire(char const * name, std::size_t size, unsigned mode = create | open);
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std::int32_t release();
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void* get() const;
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void attach(id_t);
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id_t detach();
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private:
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class handle_;
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handle_* p_;
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};
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} // namespace shm
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} // namespace ipc
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