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synchronization.h: Add DSB & several atomic operations

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fincs 2015-11-07 01:07:11 +01:00
parent 7b25a0d4d4
commit e01dfbc392
1 changed files with 17 additions and 0 deletions
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17
libctru/include/3ds/synchronization.h
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@ -15,6 +15,12 @@ typedef struct
u32 counter; ///< Lock count. u32 counter; ///< Lock count.
} RecursiveLock; } RecursiveLock;
/// Performs a Data Synchronization Barrier operation.
static inline void __dsb(void)
{
__asm__ __volatile__("mcr p15, 0, %[val], c7, c10, 4" :: [val] "r" (0) : "memory");
}
/// Performs a clrex operation. /// Performs a clrex operation.
static inline void __clrex(void) static inline void __clrex(void)
{ {
@ -46,6 +52,17 @@ static inline bool __strex(s32* addr, s32 val)
return res; return res;
} }
/// Performs an atomic pre-increment operation.
#define AtomicIncrement(ptr) __atomic_add_fetch((u32*)(ptr), 1, __ATOMIC_SEQ_CST)
/// Performs an atomic pre-decrement operation.
#define AtomicDecrement(ptr) __atomic_sub_fetch((u32*)(ptr), 1, __ATOMIC_SEQ_CST)
/// Performs an atomic post-increment operation.
#define AtomicPostIncrement(ptr) __atomic_fetch_add((u32*)(ptr), 1, __ATOMIC_SEQ_CST)
/// Performs an atomic post-decrement operation.
#define AtomicPostDecrement(ptr) __atomic_fetch_sub((u32*)(ptr), 1, __ATOMIC_SEQ_CST)
/// Performs an atomic swap operation.
#define AtomicSwap(ptr, value) __atomic_exchange_n((u32*)(ptr), (value), __ATOMIC_SEQ_CST)
/** /**
* @brief Initializes a light lock. * @brief Initializes a light lock.
* @param lock Pointer to the lock. * @param lock Pointer to the lock.