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#ifndef H_RPMSW
#define H_RPMSW
/** \ingroup rpmio
* \file rpmio/rpmsw.h
*
* Statistics API
*/
#include <unistd.h>
#include <sys/time.h>
#ifdef __cplusplus
extern "C" {
#endif
/** \ingroup rpmsw
*/
typedef unsigned long int rpmtime_t;
/** \ingroup rpmsw
*/
typedef struct rpmsw_s * rpmsw;
/** \ingroup rpmsw
*/
typedef struct rpmop_s * rpmop;
/** \ingroup rpmsw
*/
struct rpmsw_s {
union {
struct timeval tv;
unsigned long long int ticks;
unsigned long int tocks[2];
} u;
};
/** \ingroup rpmsw
* Cumulative statistics for an operation.
*/
struct rpmop_s {
struct rpmsw_s begin; /*!< Starting time stamp. */
int count; /*!< Number of operations. */
size_t bytes; /*!< Number of bytes transferred. */
rpmtime_t usecs; /*!< Number of ticks. */
};
/** \ingroup rpmsw
* Return benchmark time stamp.
* @param *sw time stamp
* @return 0 on success
*/
rpmsw rpmswNow(rpmsw sw);
/** \ingroup rpmsw
* Return benchmark time stamp difference.
* @param *end end time stamp
* @param *begin begin time stamp
* @return difference in micro-seconds
*/
rpmtime_t rpmswDiff(rpmsw end, rpmsw begin);
/** \ingroup rpmsw
* Return benchmark time stamp overhead.
* @return overhead in micro-seconds
*/
rpmtime_t rpmswInit(void);
/** \ingroup rpmsw
* Enter timed operation.
* @param op operation statistics
* @param rc -1 clears usec counter
* @return 0 always
*/
int rpmswEnter(rpmop op, ssize_t rc);
/** \ingroup rpmsw
* Exit timed operation.
* @param op operation statistics
* @param rc per-operation data (e.g. bytes transferred)
* @return cumulative usecs for operation
*/
rpmtime_t rpmswExit(rpmop op, ssize_t rc);
/** \ingroup rpmsw
* Sum statistic counters.
* @param to result statistics
* @param from operation statistics
* @return cumulative usecs for operation
*/
rpmtime_t rpmswAdd(rpmop to, rpmop from);
/** \ingroup rpmsw
* Subtract statistic counters.
* @param to result statistics
* @param from operation statistics
* @return cumulative usecs for operation
*/
rpmtime_t rpmswSub(rpmop to, rpmop from);
#ifdef __cplusplus
}
#endif
#endif /* H_RPMSW */
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