volatile unsigned long val = 1;
__sync_synchronize();
__sync_val_compare_and_swap(&val, 1, 0);
+ __sync_add_and_fetch(&val, 1);
+ __sync_sub_and_fetch(&val, 1);
return 0;
}
]]),
volatile unsigned long val = 1;
__sync_synchronize();
__sync_val_compare_and_swap(&val, 1, 0);
+ __sync_add_and_fetch(&val, 1);
+ __sync_sub_and_fetch(&val, 1);
return 0;
}
cas_flag CompareAndSwap(volatile cas_flag* ptr,
cas_flag new_value,
cas_flag old_value);
+ cas_flag AtomicPostIncrement(volatile cas_flag* ptr);
+ cas_flag AtomicPostDecrement(volatile cas_flag* ptr);
}
}
/// addAbstractTypeUser - Notify an abstract type that there is a new user of
/// it. This function is called primarily by the PATypeHandle class.
///
- void addAbstractTypeUser(AbstractTypeUser *U) const {
- assert(isAbstract() && "addAbstractTypeUser: Current type not abstract!");
- AbstractTypeUsers.push_back(U);
- }
+ void addAbstractTypeUser(AbstractTypeUser *U) const;
/// removeAbstractTypeUser - Notify an abstract type that a user of the class
/// no longer has a handle to the type. This function is called primarily by
# error No compare-and-swap implementation for your platform!
#endif
}
+
+sys::cas_flag sys::AtomicPostIncrement(volatile sys::cas_flag* ptr) {
+#if LLVM_MULTITHREADED==0
+ ++(*ptr);
+ return *ptr;
+#elif defined(__GNUC__)
+ return __sync_add_and_fetch(ptr, 1);
+#elif defined(_MSC_VER)
+ return InterlockedCompareExchange(ptr, new_value, old_value);
+#else
+# error No atomic increment implementation for your platform!
+#endif
+}
+
+sys::cas_flag sys::AtomicPostDecrement(volatile sys::cas_flag* ptr) {
+#if LLVM_MULTITHREADED==0
+ --(*ptr);
+ return *ptr;
+#elif defined(__GNUC__)
+ return __sync_sub_and_fetch(ptr, 1);
+#elif defined(_MSC_VER)
+ return InterlockedIncrement(ptr);
+#else
+# error No atomic decrement implementation for your platform!
+#endif
+}
+
+