jemalloc/jemalloc-3.0.0.atomic_h_ppc_32bit_operations.patch

diff -Naur ../jemalloc-3.0.0.orig/COPYING.epel5-ppc ./COPYING.epel5-ppc
--- ../jemalloc-3.0.0.orig/COPYING.epel5-ppc	1970-01-01 01:00:00.000000000 +0100
+++ ./COPYING.epel5-ppc	2012-05-18 16:21:31.869392165 +0200
@@ -0,0 +1,215 @@
+When using this jemalloc package with EPEL5 on ppc, please note that a
+non-upstream patch has been added. This patch is covered by the Apache
+2.0 License, which states that this work is
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+
+For other platforms and operating systems, please ignore this file.
+
+The patch adds missing 32bit atomic operations that is missing from
+RHEL5 and its derivates on ppc/ppc64. The code was fetched from the
+Apache Portable Runtime project, http://apr.apache.org/
+
+
+
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diff -Naur ../jemalloc-3.0.0.orig/include/jemalloc/internal/atomic.h ./include/jemalloc/internal/atomic.h
--- ../jemalloc-3.0.0.orig/include/jemalloc/internal/atomic.h	2012-05-12 02:50:38.000000000 +0200
+++ ./include/jemalloc/internal/atomic.h	2012-05-18 15:55:34.457212405 +0200
@@ -242,6 +242,33 @@
 
 	return (__sync_sub_and_fetch(p, x));
 }
+#elif (defined(__ppc__) || defined(__PPC__))
+// Code fetched from the boost library
+// 
+JEMALLOC_INLINE uint32_t
+atomic_add_uint32(uint32_t *p, uint32_t x)
+{
+	uint32_t prev, temp;
+
+	asm volatile ("0:\n\t"                 // retry local label     
+               "lwarx  %0,0,%2\n\t"       // load prev and reserve 
+               "add    %1,%0,%3\n\t"      // temp = prev + x 
+               "stwcx. %1,0,%2\n\t"       // conditionally store   
+               "bne-   0b"                // start over if we lost
+                                          // the reservation
+               //XXX find a cleaner way to define the temp         
+               //it's not an output
+               : "=&r" (prev), "=&r" (temp)        // output, temp 
+               : "b" (p), "r" (x)                  // inputs       
+               : "memory", "cc");                  // clobbered    
+	return temp;
+}
+
+JEMALLOC_INLINE uint32_t
+atomic_sub_uint32(uint32_t *p, uint32_t x)
+{
+	return atomic_add_uint32(p, -x);
+}
 #else
 #  error "Missing implementation for 32-bit atomic operations"
 #endif