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barrier.h: add some minimal docs

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Change-Id: Icd8af783713f80fd560092411782fe68f89b0d9a
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
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Daniel Verkamp 2017-01-04 15:14:02 -07:00 committed by Ben Walker
parent c720c8a342
commit c5582f2720
1 changed files with 3 additions and 0 deletions
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include/spdk/barrier.h
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@ -42,7 +42,10 @@
extern "C" { extern "C" {
#endif #endif
/** Write memory barrier */
#define spdk_wmb() __asm volatile("sfence" ::: "memory") #define spdk_wmb() __asm volatile("sfence" ::: "memory")
/** Full read/write memory barrier */
#define spdk_mb() __asm volatile("mfence" ::: "memory") #define spdk_mb() __asm volatile("mfence" ::: "memory")
#ifdef __cplusplus #ifdef __cplusplus