[OpenImageIO] Add ppc patch.

[Richard Shaw]

commit 011445b9a706a89a12039b7d1cf6704b9ed52da3
Author: Richard M. Shaw <hobbes1069 at gmail.com>
Date:   Tue Jun 12 14:03:59 2012 -0500

    Add ppc patch.

 OpenImageIO-ppc.patch |   45 +++++++++++++++++++++++++++++++++++++++++++++
 OpenImageIO.spec      |    2 ++
 2 files changed, 47 insertions(+), 0 deletions(-)
---
diff --git a/OpenImageIO-ppc.patch b/OpenImageIO-ppc.patch
new file mode 100644
index 0000000..830bf27
--- /dev/null
+++ b/OpenImageIO-ppc.patch
@@ -0,0 +1,45 @@
+diff -up OpenImageIO-oiio-1fa4a20/src/include/thread.h.ppckh OpenImageIO-oiio-1fa4a20/src/include/thread.h
+--- OpenImageIO-oiio-1fa4a20/src/include/thread.h.ppckh	2012-04-25 15:29:32.530321567 +0200
++++ OpenImageIO-oiio-1fa4a20/src/include/thread.h	2012-04-25 15:29:42.490320642 +0200
+@@ -267,6 +267,11 @@ atomic_exchange_and_add (volatile int *a
+ #elif defined(_WIN32)
+     // Windows
+     return _InterlockedExchangeAdd ((volatile LONG *)at, x);
++#elif defined (__PPC__)
++   long long r;
++   r = *at;
++   *at += x;
++   return r;
+ #else
+ #   error No atomics on this platform.
+ #endif
+@@ -292,6 +297,11 @@ atomic_exchange_and_add (volatile long l
+ #  else
+     return InterlockedExchangeAdd64 ((volatile LONGLONG *)at, x);
+ #  endif
++#elif defined (__PPC__)
++   long long r;
++   r = *at;
++   *at += x;
++   return r;
+ #else
+ #   error No atomics on this platform.
+ #endif
+@@ -317,6 +327,8 @@ atomic_compare_and_exchange (volatile in
+     return OSAtomicCompareAndSwap32Barrier (compareval, newval, at);
+ #elif defined(_WIN32)
+     return (_InterlockedCompareExchange ((volatile LONG *)at, newval, compareval) == compareval);
++#elif defined(__PPC__)
++    return ((*at == compareval) ? (*at = newval), 1 : 0);
+ #else
+ #   error No atomics on this platform.
+ #endif
+@@ -336,6 +348,8 @@ atomic_compare_and_exchange (volatile lo
+     return OSAtomicCompareAndSwap64Barrier (compareval, newval, at);
+ #elif defined(_WIN32)
+     return (_InterlockedCompareExchange64 ((volatile LONGLONG *)at, newval, compareval) == compareval);
++#elif defined(__PPC__)
++    return ((*at == compareval) ? (*at = newval), 1 : 0);
+ #else
+ #   error No atomics on this platform.
+ #endif
diff --git a/OpenImageIO.spec b/OpenImageIO.spec
index 3fa7aae..7dbc5a3 100644
--- a/OpenImageIO.spec
+++ b/OpenImageIO.spec
@@ -15,6 +15,7 @@ Source1:        FindTBB.cmake
 
 Patch0:         OpenImageIO-1.0.0-use_external_tbb.patch
 Patch1:         OpenImageIO-1.0.0-tbb_include.patch
+Patch2:         OpenImageIO-ppc.patch
 
 BuildRequires:  cmake
 BuildRequires:  qt4-devel
@@ -63,6 +64,7 @@ Development files for package %{name}
 %setup -q -n %{name}-oiio-%{githash2}
 %patch0 -p1 -b .exttbb
 %patch1 -p1 -b .tbbinc
+%patch2 -p1 -b .ppc
 
 # Remove bundled pugixml
 rm -f src/include/pugixml.hpp \