// for libtcc1, avoid including files that are not part of tcc// #include <stdint.h>#define uint8_t unsigned char#define uint16_t unsigned short#define uint32_t unsigned int#define uint64_t unsigned long long#define bool _Bool#define false 0#define true 1#define __ATOMIC_RELAXED 0#define __ATOMIC_CONSUME 1#define __ATOMIC_ACQUIRE 2#define __ATOMIC_RELEASE 3#define __ATOMIC_ACQ_REL 4#define __ATOMIC_SEQ_CST 5typedef __SIZE_TYPE__ size_t; #if defined __i386__ || defined __x86_64__#define ATOMIC_COMPARE_EXCHANGE(TYPE, MODE, SUFFIX) \    bool __atomic_compare_exchange_##MODE \        (volatile void *atom, void *ref, TYPE xchg, \         bool weak, int success_memorder, int failure_memorder) \    { \        TYPE rv; \        TYPE cmp = *(TYPE *)ref; \        __asm__ volatile( \            "lock cmpxchg" SUFFIX " %2,%1\n" \            : "=a" (rv), "+m" (*(TYPE *)atom) \            : "q" (xchg), "0" (cmp) \            : "memory" \        ); \        *(TYPE *)ref = rv; \        return (rv == cmp); \    }#else#define ATOMIC_COMPARE_EXCHANGE(TYPE, MODE, SUFFIX) \    extern bool __atomic_compare_exchange_##MODE \        (volatile void *atom, void *ref, TYPE xchg, \         bool weak, int success_memorder, int failure_memorder);#endif #define ATOMIC_LOAD(TYPE, MODE) \    TYPE __atomic_load_##MODE(const volatile void *atom, int memorder) \    { \        return *(volatile TYPE *)atom; \    } #define ATOMIC_STORE(TYPE, MODE) \    void __atomic_store_##MODE(volatile void *atom, TYPE value, int memorder) \    { \        *(volatile TYPE *)atom = value; \    } #define ATOMIC_GEN_OP(TYPE, MODE, NAME, OP, RET) \    TYPE __atomic_##NAME##_##MODE(volatile void *atom, TYPE value, int memorder) \    { \        TYPE xchg, cmp; \        __atomic_load((TYPE *)atom, (TYPE *)&cmp, __ATOMIC_RELAXED); \        do { \            xchg = (OP); \        } while (!__atomic_compare_exchange((TYPE *)atom, &cmp, &xchg, true, \                                            __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)); \        return RET; \    } #define ATOMIC_EXCHANGE(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, exchange, value, cmp)#define ATOMIC_ADD_FETCH(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, add_fetch, (cmp + value), xchg)#define ATOMIC_SUB_FETCH(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, sub_fetch, (cmp - value), xchg)#define ATOMIC_AND_FETCH(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, and_fetch, (cmp & value), xchg)#define ATOMIC_OR_FETCH(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, or_fetch, (cmp | value), xchg)#define ATOMIC_XOR_FETCH(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, xor_fetch, (cmp ^ value), xchg)#define ATOMIC_NAND_FETCH(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, nand_fetch, ~(cmp & value), xchg)#define ATOMIC_FETCH_ADD(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, fetch_add, (cmp + value), cmp)#define ATOMIC_FETCH_SUB(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, fetch_sub, (cmp - value), cmp)#define ATOMIC_FETCH_AND(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, fetch_and, (cmp & value), cmp)#define ATOMIC_FETCH_OR(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, fetch_or, (cmp | value), cmp)#define ATOMIC_FETCH_XOR(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, fetch_xor, (cmp ^ value), cmp)#define ATOMIC_FETCH_NAND(TYPE, MODE) \    ATOMIC_GEN_OP(TYPE, MODE, fetch_nand, ~(cmp & value), cmp) #define ATOMIC_GEN(TYPE, SIZE, SUFFIX) \    ATOMIC_STORE(TYPE, SIZE) \    ATOMIC_LOAD(TYPE, SIZE) \    ATOMIC_COMPARE_EXCHANGE(TYPE, SIZE, SUFFIX) \    ATOMIC_EXCHANGE(TYPE, SIZE) \    ATOMIC_ADD_FETCH(TYPE, SIZE) \    ATOMIC_SUB_FETCH(TYPE, SIZE) \    ATOMIC_AND_FETCH(TYPE, SIZE) \    ATOMIC_OR_FETCH(TYPE, SIZE) \    ATOMIC_XOR_FETCH(TYPE, SIZE) \    ATOMIC_NAND_FETCH(TYPE, SIZE) \    ATOMIC_FETCH_ADD(TYPE, SIZE) \    ATOMIC_FETCH_SUB(TYPE, SIZE) \    ATOMIC_FETCH_AND(TYPE, SIZE) \    ATOMIC_FETCH_OR(TYPE, SIZE) \    ATOMIC_FETCH_XOR(TYPE, SIZE) \    ATOMIC_FETCH_NAND(TYPE, SIZE) ATOMIC_GEN(uint8_t, 1, "b")ATOMIC_GEN(uint16_t, 2, "w")ATOMIC_GEN(uint32_t, 4, "l")#if defined __x86_64__ || defined __aarch64__ || defined __riscvATOMIC_GEN(uint64_t, 8, "q")#endif /* uses alias to allow building with gcc/clang */#ifdef __TINYC__#define ATOMIC(x)      __atomic_##x#else#define ATOMIC(x)      __tcc_atomic_##x#endif void ATOMIC(signal_fence) (int memorder){} void ATOMIC(thread_fence) (int memorder){#if defined __i386__        __asm__ volatile("lock orl $0, (%esp)");#elif defined __x86_64__        __asm__ volatile("lock orq $0, (%rsp)");#elif defined __arm__        __asm__ volatile(".int 0xee070fba"); // mcr p15, 0, r0, c7, c10, 5#elif defined __aarch64__        __asm__ volatile(".int 0xd5033bbf"); // dmb ish#elif defined __riscv        __asm__ volatile(".int 0x0ff0000f"); // fence iorw,iorw#endif} bool ATOMIC(is_lock_free) (unsigned long size, const volatile void *ptr){    bool ret;     switch (size) {    case 1: ret = true; break;    case 2: ret = true; break;    case 4: ret = true; break;#if defined __x86_64__ || defined __aarch64__ || defined __riscv    case 8: ret = true; break;#else    case 8: ret = false; break;#endif    default: ret = false; break;    }    return ret;} #ifndef __TINYC__void __atomic_signal_fence(int memorder) __attribute__((alias("__tcc_atomic_signal_fence")));void __atomic_thread_fence(int memorder) __attribute__((alias("__tcc_atomic_thread_fence")));bool __atomic_is_lock_free(unsigned long size, const volatile void *ptr) __attribute__((alias("__tcc_atomic_is_lock_free")));#endif