diff options
Diffstat (limited to 'src/atomic_counter.hpp')
| -rw-r--r-- | src/atomic_counter.hpp | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/src/atomic_counter.hpp b/src/atomic_counter.hpp index 914afdc..07002af 100644 --- a/src/atomic_counter.hpp +++ b/src/atomic_counter.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. @@ -29,6 +29,8 @@ #define XS_ATOMIC_COUNTER_MUTEX #elif (defined __i386__ || defined __x86_64__) && defined __GNUC__ #define XS_ATOMIC_COUNTER_X86 +#elif defined __ARM_ARCH_7A__ && defined __GNUC__ +#define XS_ATOMIC_COUNTER_ARM #elif defined XS_HAVE_WINDOWS #define XS_ATOMIC_COUNTER_WINDOWS #elif (defined XS_HAVE_SOLARIS || defined XS_HAVE_NETBSD) @@ -88,6 +90,19 @@ namespace xs : "=r" (old_value), "=m" (value) : "0" (increment_), "m" (value) : "cc", "memory"); +#elif defined XS_ATOMIC_COUNTER_ARM + integer_t flag, tmp; + __asm__ volatile ( + " dmb sy\n\t" + "1: ldrex %0, [%5]\n\t" + " add %2, %0, %4\n\t" + " strex %1, %2, [%5]\n\t" + " teq %1, #0\n\t" + " bne 1b\n\t" + " dmb sy\n\t" + : "=&r"(old_value), "=&r"(flag), "=&r"(tmp), "+Qo"(value) + : "Ir"(increment_), "r"(&value) + : "cc"); #elif defined XS_ATOMIC_COUNTER_MUTEX sync.lock (); old_value = value; @@ -118,6 +133,20 @@ namespace xs : "0" (oldval), "m" (*val) : "cc", "memory"); return oldval != decrement; +#elif defined XS_ATOMIC_COUNTER_ARM + integer_t old_value, flag, tmp; + __asm__ volatile ( + " dmb sy\n\t" + "1: ldrex %0, [%5]\n\t" + " sub %2, %0, %4\n\t" + " strex %1, %2, [%5]\n\t" + " teq %1, #0\n\t" + " bne 1b\n\t" + " dmb sy\n\t" + : "=&r"(old_value), "=&r"(flag), "=&r"(tmp), "+Qo"(value) + : "Ir"(decrement), "r"(&value) + : "cc"); + return old_value - decrement != 0; #elif defined XS_ATOMIC_COUNTER_MUTEX sync.lock (); value -= decrement; @@ -157,6 +186,9 @@ namespace xs #if defined XS_ATOMIC_COUNTER_X86 #undef XS_ATOMIC_COUNTER_X86 #endif +#if defined XS_ATOMIC_COUNTER_ARM +#undef XS_ATOMIC_COUNTER_ARM +#endif #if defined XS_ATOMIC_COUNTER_MUTEX #undef XS_ATOMIC_COUNTER_MUTEX #endif |