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/*-
* Copyright (c) 2014-2017 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
/*
* __wt_cond_wait --
* Wait on a mutex, optionally timing out.
*/
static inline void
__wt_cond_wait(WT_SESSION_IMPL *session,
WT_CONDVAR *cond, uint64_t usecs, bool (*run_func)(WT_SESSION_IMPL *))
{
bool notused;
__wt_cond_wait_signal(session, cond, usecs, run_func, ¬used);
}
/*
* __wt_hex --
* Convert a byte to a hex character.
*/
static inline u_char
__wt_hex(int c)
{
return ((u_char)"0123456789abcdef"[c]);
}
/*
* __wt_strdup --
* ANSI strdup function.
*/
static inline int
__wt_strdup(WT_SESSION_IMPL *session, const char *str, void *retp)
{
return (__wt_strndup(
session, str, (str == NULL) ? 0 : strlen(str), retp));
}
/*
* __wt_seconds --
* Return the seconds since the Epoch.
*/
static inline void
__wt_seconds(WT_SESSION_IMPL *session, time_t *timep)
{
struct timespec t;
__wt_epoch(session, &t);
*timep = t.tv_sec;
}
/*
* __wt_time_check_monotonic --
* Check and prevent time running backward. If we detect that it has, we
* set the time structure to the previous values, making time stand still
* until we see a time in the future of the highest value seen so far.
*/
static inline void
__wt_time_check_monotonic(WT_SESSION_IMPL *session, struct timespec *tsp)
{
/*
* Detect time going backward. If so, use the last
* saved timestamp.
*/
if (session == NULL)
return;
if (tsp->tv_sec < session->last_epoch.tv_sec ||
(tsp->tv_sec == session->last_epoch.tv_sec &&
tsp->tv_nsec < session->last_epoch.tv_nsec)) {
WT_STAT_CONN_INCR(session, time_travel);
*tsp = session->last_epoch;
} else
session->last_epoch = *tsp;
}
/*
* __wt_snprintf --
* snprintf convenience function, ignoring the returned size.
*/
static inline int
__wt_snprintf(char *buf, size_t size, const char *fmt, ...)
WT_GCC_FUNC_ATTRIBUTE((format (printf, 3, 4)))
{
WT_DECL_RET;
size_t len;
va_list ap;
len = 0;
va_start(ap, fmt);
ret = __wt_vsnprintf_len_incr(buf, size, &len, fmt, ap);
va_end(ap);
WT_RET(ret);
/* It's an error if the buffer couldn't hold everything. */
return (len >= size ? ERANGE : 0);
}
/*
* __wt_vsnprintf --
* vsnprintf convenience function, ignoring the returned size.
*/
static inline int
__wt_vsnprintf(char *buf, size_t size, const char *fmt, va_list ap)
{
size_t len;
len = 0;
WT_RET(__wt_vsnprintf_len_incr(buf, size, &len, fmt, ap));
/* It's an error if the buffer couldn't hold everything. */
return (len >= size ? ERANGE : 0);
}
/*
* __wt_snprintf_len_set --
* snprintf convenience function, setting the returned size.
*/
static inline int
__wt_snprintf_len_set(
char *buf, size_t size, size_t *retsizep, const char *fmt, ...)
WT_GCC_FUNC_ATTRIBUTE((format (printf, 4, 5)))
{
WT_DECL_RET;
va_list ap;
*retsizep = 0;
va_start(ap, fmt);
ret = __wt_vsnprintf_len_incr(buf, size, retsizep, fmt, ap);
va_end(ap);
return (ret);
}
/*
* __wt_vsnprintf_len_set --
* vsnprintf convenience function, setting the returned size.
*/
static inline int
__wt_vsnprintf_len_set(
char *buf, size_t size, size_t *retsizep, const char *fmt, va_list ap)
{
*retsizep = 0;
return (__wt_vsnprintf_len_incr(buf, size, retsizep, fmt, ap));
}
/*
* __wt_snprintf_len_incr --
* snprintf convenience function, incrementing the returned size.
*/
static inline int
__wt_snprintf_len_incr(
char *buf, size_t size, size_t *retsizep, const char *fmt, ...)
WT_GCC_FUNC_ATTRIBUTE((format (printf, 4, 5)))
{
WT_DECL_RET;
va_list ap;
va_start(ap, fmt);
ret = __wt_vsnprintf_len_incr(buf, size, retsizep, fmt, ap);
va_end(ap);
return (ret);
}
/*
* __wt_txn_context_check --
* Complain if a transaction is/isn't running.
*/
static inline int
__wt_txn_context_check(WT_SESSION_IMPL *session, bool requires_txn)
{
if (requires_txn && !F_ISSET(&session->txn, WT_TXN_RUNNING))
WT_RET_MSG(session, EINVAL,
"%s: only permitted in a running transaction",
session->name);
if (!requires_txn && F_ISSET(&session->txn, WT_TXN_RUNNING))
WT_RET_MSG(session, EINVAL,
"%s: not permitted in a running transaction",
session->name);
return (0);
}
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