diff options
Diffstat (limited to 'src/atomic_ptr.hpp')
| -rw-r--r-- | src/atomic_ptr.hpp | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/src/atomic_ptr.hpp b/src/atomic_ptr.hpp index b197aa1..8d4c770 100644 --- a/src/atomic_ptr.hpp +++ b/src/atomic_ptr.hpp @@ -1,7 +1,7 @@ /* Copyright (c) 2009-2012 250bpm s.r.o. Copyright (c) 2007-2009 iMatix Corporation - Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file + Copyright (c) 2007-2012 Other contributors as noted in the AUTHORS file This file is part of Crossroads I/O project. @@ -30,6 +30,8 @@ #define XS_ATOMIC_PTR_MUTEX #elif (defined __i386__ || defined __x86_64__) && defined __GNUC__ #define XS_ATOMIC_PTR_X86 +#elif defined __ARM_ARCH_7A__ && defined __GNUC__ +#define XS_ATOMIC_PTR_ARM #elif defined XS_HAVE_WINDOWS #define XS_ATOMIC_PTR_WINDOWS #elif (defined XS_HAVE_SOLARIS || defined XS_HAVE_NETBSD) @@ -89,6 +91,20 @@ namespace xs : "=r" (old), "=m" (ptr) : "m" (ptr), "0" (val_)); return old; +#elif defined XS_ATOMIC_PTR_ARM + T* old; + unsigned int flag; + __asm__ volatile ( + " dmb sy\n\t" + "1: ldrex %1, [%3]\n\t" + " strex %0, %4, [%3]\n\t" + " teq %0, #0\n\t" + " bne 1b\n\t" + " dmb sy\n\t" + : "=&r"(flag), "=&r"(old), "+Qo"(ptr) + : "r"(&ptr), "r"(val_) + : "cc"); + return old; #elif defined XS_ATOMIC_PTR_MUTEX sync.lock (); T *old = (T*) ptr; @@ -119,6 +135,22 @@ namespace xs : "r" (val_), "m" (ptr), "0" (cmp_) : "cc"); return old; +#elif defined XS_ATOMIC_PTR_ARM + T *old; + unsigned int flag; + __asm__ volatile ( + " dmb sy\n\t" + "1: ldrex %1, [%3]\n\t" + " mov %0, #0\n\t" + " teq %1, %4\n\t" + " strexeq %0, %5, [%3]\n\t" + " teq %0, #0\n\t" + " bne 1b\n\t" + " dmb sy\n\t" + : "=&r"(flag), "=&r"(old), "+Qo"(ptr) + : "r"(&ptr), "r"(cmp_), "r"(val_) + : "cc"); + return old; #elif defined XS_ATOMIC_PTR_MUTEX sync.lock (); T *old = (T*) ptr; @@ -154,6 +186,9 @@ namespace xs #if defined XS_ATOMIC_PTR_X86 #undef XS_ATOMIC_PTR_X86 #endif +#if defined XS_ATOMIC_PTR_ARM +#undef XS_ATOMIC_PTR_ARM +#endif #if defined XS_ATOMIC_PTR_MUTEX #undef XS_ATOMIC_PTR_MUTEX #endif |