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/* Public domain. */
#ifndef _LINUX_IOPOLL_H
#define _LINUX_IOPOLL_H
#define readx_poll_timeout(op, addr, val, cond, sleep_us, timeout_us) \
({ \
struct timeval __end, __now, __timeout_tv; \
int __timed_out = 0; \
\
if (timeout_us) { \
microuptime(&__now); \
USEC_TO_TIMEVAL(timeout_us, &__timeout_tv); \
timeradd(&__now, &__timeout_tv, &__end); \
} \
\
for (;;) { \
(val) = (op)(addr); \
if (cond) \
break; \
if (timeout_us) { \
microuptime(&__now); \
if (timercmp(&__end, &__now, <=)) { \
__timed_out = 1; \
break; \
} \
} \
if (sleep_us) \
delay((sleep_us) / 2); \
} \
(__timed_out) ? -ETIMEDOUT : 0; \
})
#endif
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