synchronization.h: Add DSB & several atomic operations

diff --git a/libctru/include/3ds/synchronization.h b/libctru/include/3ds/synchronization.h
index c919757ca81ba30c2fa4c6e98cedc2c55443e952..c8703bcfc04552e04508739936ea83a881649c45 100644 (file)
--- a/libctru/include/3ds/synchronization.h
+++ b/libctru/include/3ds/synchronization.h
@@ -15,6 +15,12 @@ typedef struct
        u32 counter;    ///< Lock count.
 } 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.
 static inline void __clrex(void)
 {
@@ -46,6 +52,17 @@ static inline bool __strex(s32* addr, s32 val)
        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.
  * @param lock Pointer to the lock.