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c7fe8567b8
Enables trivial synchronization between shared mem. Reduces memory usage, but potentially degrades performance. Rename an overload of vm::passive_lock to vm::range_lock.
49 lines
977 B
C++
49 lines
977 B
C++
#pragma once
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#include "vm.h"
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class cpu_thread;
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class shared_mutex;
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namespace vm
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{
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extern shared_mutex g_mutex;
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extern thread_local atomic_t<cpu_thread*>* g_tls_locked;
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// Register reader
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void passive_lock(cpu_thread& cpu);
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atomic_t<u64>* range_lock(u32 begin, u32 end);
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// Unregister reader
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void passive_unlock(cpu_thread& cpu);
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// Unregister reader (foreign thread)
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void cleanup_unlock(cpu_thread& cpu) noexcept;
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// Optimization (set cpu_flag::memory)
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void temporary_unlock(cpu_thread& cpu) noexcept;
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void temporary_unlock() noexcept;
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class reader_lock final
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{
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bool m_upgraded = false;
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public:
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reader_lock(const reader_lock&) = delete;
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reader_lock& operator=(const reader_lock&) = delete;
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reader_lock();
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~reader_lock();
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void upgrade();
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};
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struct writer_lock final
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{
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writer_lock(const writer_lock&) = delete;
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writer_lock& operator=(const writer_lock&) = delete;
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writer_lock(u32 addr = 0);
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~writer_lock();
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};
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} // namespace vm
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