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Label the existing atomic functions as 32-bit specific, and add a 64-bit one that will be useful in

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the near future.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73971 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-06-23 18:01:04 +00:00
parent bb3231f7c4
commit 0de9953e88
4 changed files with 32 additions and 19 deletions
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26
lib/System/Atomic.cpp
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@@ -35,11 +35,11 @@ void sys::MemoryFence() {
#endif
}
sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
sys::cas_flag new_value,
sys::cas_flag old_value) {
uint32_t sys::CompareAndSwap32(volatile uint32_t* ptr,
uint32_t new_value,
uint32_t old_value) {
#if LLVM_MULTITHREADED==0
sys::cas_flag result = *ptr;
uint32_t result = *ptr;
if (result == old_value)
*ptr = new_value;
return result;
@@ -52,7 +52,7 @@ sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
#endif
}
sys::cas_flag sys::AtomicIncrement(volatile sys::cas_flag* ptr) {
uint32_t sys::AtomicIncrement32(volatile uint32_t* ptr) {
#if LLVM_MULTITHREADED==0
++(*ptr);
return *ptr;
@@ -65,7 +65,7 @@ sys::cas_flag sys::AtomicIncrement(volatile sys::cas_flag* ptr) {
#endif
}
sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) {
uint32_t sys::AtomicDecrement32(volatile uint32_t* ptr) {
#if LLVM_MULTITHREADED==0
--(*ptr);
return *ptr;
@@ -78,7 +78,7 @@ sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) {
#endif
}
sys::cas_flag sys::AtomicAdd(volatile sys::cas_flag* ptr, sys::cas_flag val) {
uint32_t sys::AtomicAdd32(volatile uint32_t* ptr, uint32_t val) {
#if LLVM_MULTITHREADED==0
*ptr += val;
return *ptr;
@@ -91,4 +91,16 @@ sys::cas_flag sys::AtomicAdd(volatile sys::cas_flag* ptr, sys::cas_flag val) {
#endif
}
uint64_t sys::AtomicAdd64(volatile uint64_t* ptr, uint64_t val) {
#if LLVM_MULTITHREADED==0
*ptr += val;
return *ptr;
#elif defined(__GNUC__)
return __sync_add_and_fetch(ptr, val);
#elif defined(_MSC_VER)
return InterlockedAdd64(ptr, val);
#else
# error No atomic add implementation for your platform!
#endif
}