#define UTIL_FUTEX_H
#if defined(HAVE_LINUX_FUTEX_H)
+#define UTIL_FUTEX_SUPPORTED 1
#include <limits.h>
#include <stdint.h>
}
#elif defined(__FreeBSD__)
+#define UTIL_FUTEX_SUPPORTED 1
#include <assert.h>
#include <errno.h>
return _umtx_op(addr, UMTX_OP_WAIT_UINT, (uint32_t)value, uaddr, uaddr2) == -1 ? errno : 0;
}
+#elif defined(__OpenBSD__)
+#define UTIL_FUTEX_SUPPORTED 1
+
+#include <sys/time.h>
+#include <sys/futex.h>
+
+static inline int futex_wake(uint32_t *addr, int count)
+{
+ return futex(addr, FUTEX_WAKE, count, NULL, NULL);
+}
+
+static inline int futex_wait(uint32_t *addr, int32_t value, const struct timespec *timeout)
+{
+ struct timespec tsnow, tsrel;
+
+ if (timeout == NULL)
+ return futex(addr, FUTEX_WAIT, value, NULL, NULL);
+
+ clock_gettime(CLOCK_MONOTONIC, &tsnow);
+ if (timespeccmp(&tsnow, timeout, <))
+ timespecsub(timeout, &tsnow, &tsrel);
+ else
+ timespecclear(&tsrel);
+ return futex(addr, FUTEX_WAIT, value, &tsrel, NULL);
+}
+
+#else
+#define UTIL_FUTEX_SUPPORTED 0
#endif
#endif /* UTIL_FUTEX_H */