Revert "Add a method to atomic add."

This reverts commit eb539cf92f487daf9567ffbbba6b6653406d43ae.

BUG=
TEST=

Review URL: https://codereview.appspot.com/6395051

git-svn-id: http://skia.googlecode.com/svn/trunk@4615 2bbb7eff-a529-9590-31e7-b0007b416f81

3 files changed, 1 insertions, 27 deletions

diff --git a/src/ports/SkThread_none.cpp b/src/ports/SkThread_none.cpp
index 1122c959d3..56bbbae3b3 100644
--- a/src/ports/SkThread_none.cpp
+++ b/src/ports/SkThread_none.cpp
@@ -16,12 +16,6 @@ int32_t sk_atomic_inc(int32_t* addr) {
     return value;
 }
 
-int32_t sk_atomic_add(int32_t* addr, int32_t inc) {
-    int32_t value = *addr;
-    *addr = value + inc;
-    return value;
-}
-
 int32_t sk_atomic_dec(int32_t* addr) {
     int32_t value = *addr;
     *addr = value - 1;
diff --git a/src/ports/SkThread_pthread.cpp b/src/ports/SkThread_pthread.cpp
index a1c7b24f66..d0bb3acbad 100644
--- a/src/ports/SkThread_pthread.cpp
+++ b/src/ports/SkThread_pthread.cpp
@@ -35,11 +35,6 @@ int32_t sk_atomic_inc(int32_t* addr)
     return __sync_fetch_and_add(addr, 1);
 }
 
-int32_t sk_atomic_add(int32_t* addr, int32_t value)
-{
-    return __sync_fetch_and_add(addr, value);
-}
-
 int32_t sk_atomic_dec(int32_t* addr)
 {
     return __sync_fetch_and_add(addr, -1);
@@ -79,15 +74,6 @@ int32_t sk_atomic_inc(int32_t* addr)
     return value;
 }
 
-int32_t sk_atomic_add(int32_t* addr, int32_t inc)
-{
-    SkAutoMutexAcquire ac(gAtomicMutex);
-    
-    int32_t value = *addr;
-    *addr = value + inc;
-    return value;
-}
-
 int32_t sk_atomic_dec(int32_t* addr)
 {
     SkAutoMutexAcquire ac(gAtomicMutex);
diff --git a/src/ports/SkThread_win.cpp b/src/ports/SkThread_win.cpp
index 7d091d2a67..e833314843 100644
--- a/src/ports/SkThread_win.cpp
+++ b/src/ports/SkThread_win.cpp
@@ -16,7 +16,7 @@
 //intrinsic, include intrin.h and put the function in a #pragma intrinsic
 //directive.
 //The pragma appears to be unnecessary, but doesn't hurt.
-#pragma intrinsic(_InterlockedIncrement, _InterlockedAdd, _InterlockedDecrement)
+#pragma intrinsic(_InterlockedIncrement, _InterlockedDecrement)
 #pragma intrinsic(_InterlockedCompareExchange)
 
 int32_t sk_atomic_inc(int32_t* addr) {
@@ -24,12 +24,6 @@ int32_t sk_atomic_inc(int32_t* addr) {
     return _InterlockedIncrement(reinterpret_cast<LONG*>(addr)) - 1;
 }
 
-int32_t sk_atomic_add(int32_t* addr, int32_t inc) {
-    // InterlockedAdd returns the new value, we want to return the old.
-    LONG value = reinterpret_cast<LONG>(inc);
-    return _InterlockedAdd(reinterpret_cast<LONG*>(addr), value) - value;
-}
-
 int32_t sk_atomic_dec(int32_t* addr) {
     return _InterlockedDecrement(reinterpret_cast<LONG*>(addr)) + 1;
 }