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#pragma once
#include <atomic>
#include "WAVM/Inline/Assert.h"
#include "WAVM/Inline/BasicTypes.h"
#include "WAVM/Platform/Defines.h"
namespace WAVM { namespace Platform {
// Platform-independent mutexes.
struct Mutex
{
WAVM_API Mutex();
WAVM_API ~Mutex();
// Don't allow copying or moving a Mutex.
Mutex(const Mutex&) = delete;
Mutex(Mutex&&) = delete;
void operator=(const Mutex&) = delete;
void operator=(Mutex&&) = delete;
WAVM_API void lock();
WAVM_API void unlock();
#if WAVM_ENABLE_ASSERTS
WAVM_API bool isLockedByCurrentThread();
#endif
// Scoped lock: automatically unlocks when destructed.
struct Lock
{
Lock() : mutex(nullptr) {}
Lock(Mutex& inMutex) : mutex(&inMutex) { mutex->lock(); }
~Lock() { unlock(); }
void unlock()
{
if(mutex)
{
mutex->unlock();
mutex = nullptr;
}
}
private:
Mutex* mutex;
};
private:
struct LockData
{
#if defined(WIN32)
Uptr data;
#elif defined(__linux__) && defined(__x86_64__)
U64 data[5];
#elif defined(__linux__) && defined(__aarch64__)
U64 data[6];
#elif defined(__APPLE__)
U64 data[8];
#else
// For unidentified platforms, just use 64 bytes for the mutex.
U64 data[8];
#endif
} lockData;
#if WAVM_ENABLE_ASSERTS
#if defined(_WIN32)
std::atomic<U32> lockingThreadId{0};
#else
bool isLocked;
#endif
#endif
};
}}
#if WAVM_ENABLE_ASSERTS
#define WAVM_ASSERT_MUTEX_IS_LOCKED_BY_CURRENT_THREAD(mutex) \
WAVM_ASSERT((mutex).isLockedByCurrentThread())
#else
#define WAVM_ASSERT_MUTEX_IS_LOCKED_BY_CURRENT_THREAD(mutex) WAVM_ASSERT(&(mutex) == &(mutex))
#endif
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