diff options
| author | behlendo <behlendo@7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c> | 2008-08-11 22:42:04 +0000 |
|---|---|---|
| committer | behlendo <behlendo@7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c> | 2008-08-11 22:42:04 +0000 |
| commit | b61a6e8bdc5ca52a09ff02a6ce2e92742725f8cc (patch) | |
| tree | 5848193e57d72b0287a019e3b2f1734aa4fa7c3c /include/sys/atomic.h | |
| parent | 3d061e9d1092364be132fc3f6c478add94b4e482 (diff) | |
Pull in initial 32-bit support patches.
git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@156 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
Diffstat (limited to 'include/sys/atomic.h')
| -rw-r--r-- | include/sys/atomic.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/include/sys/atomic.h b/include/sys/atomic.h index 7bb915611..cd0eb3b0a 100644 --- a/include/sys/atomic.h +++ b/include/sys/atomic.h @@ -33,6 +33,7 @@ extern "C" { #include <linux/module.h> #include <linux/spinlock.h> +#include <sys/isa_defs.h> /* XXX: Serialize everything through global locks. This is * going to be bad for performance, but for now it's the easiest @@ -133,7 +134,23 @@ atomic_cas_64(volatile uint64_t *target, uint64_t cmp, return rc; } -#if defined(__x86_64__) +static __inline__ uint32_t +atomic_cas_32(volatile uint32_t *target, uint32_t cmp, + uint32_t newval) +{ + uint32_t rc; + + spin_lock(&atomic32_lock); + rc = *target; + if (*target == cmp) + *target = newval; + + spin_unlock(&atomic32_lock); + + return rc; +} + +#ifdef _LP64 /* XXX: Implement atomic_cas_ptr() in terms of uint64'ts. This * is of course only safe and correct for 64 bit arches... but * for now I'm OK with that. @@ -144,6 +161,13 @@ atomic_cas_ptr(volatile void *target, void *cmp, void *newval) return (void *)atomic_cas_64((volatile uint64_t *)target, (uint64_t)cmp, (uint64_t)newval); } +#else +static __inline__ void * +atomic_cas_ptr(volatile void *target, void *cmp, void *newval) +{ + return (void *)atomic_cas_32((volatile uint32_t *)target, + (uint32_t)cmp, (uint32_t)newval); +} #endif #ifdef __cplusplus |