mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-30 18:41:56 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix for counting query time for Windows.

Browse source 
mysys/my_getsystime.c:
  Fix for counting query time for Windows. Added parenthesis just
  to make reading code easier. Fixed some comments.
This commit is contained in:
unknown 2007-10-29 18:18:49 +02:00
parent 082b0b04ad
commit 56e0d38d0b
1 changed files with 23 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

40
mysys/my_getsystime.c
View file

@ -35,9 +35,9 @@ ulonglong my_getsystime()
if (query_performance_frequency) if (query_performance_frequency)
{ {
QueryPerformanceCounter(&t_cnt); QueryPerformanceCounter(&t_cnt);
return (t_cnt.QuadPart / query_performance_frequency * 10000000+ return ((t_cnt.QuadPart / query_performance_frequency * 10000000) +
t_cnt.QuadPart % query_performance_frequency * 10000000/ (t_cnt.QuadPart % query_performance_frequency * 10000000 /
query_performance_frequency+query_performance_offset); query_performance_frequency) + query_performance_offset);
} }
return 0; return 0;
#elif defined(__NETWARE__) #elif defined(__NETWARE__)
@ -108,7 +108,9 @@ ulonglong my_micro_time()
if (query_performance_frequency) if (query_performance_frequency)
{ {
QueryPerformanceCounter((LARGE_INTEGER*) &newtime); QueryPerformanceCounter((LARGE_INTEGER*) &newtime);
newtime/= (query_performance_frequency * 1000000); return ((new_time / query_performance_frequency * 10000000) +
(new_time % query_performance_frequency * 10000000 /
query_performance_frequency));
} }
else else
newtime= (GetTickCount() * 1000); /* GetTickCount only returns milliseconds */ newtime= (GetTickCount() * 1000); /* GetTickCount only returns milliseconds */
@ -117,7 +119,9 @@ ulonglong my_micro_time()
return gethrtime()/1000; return gethrtime()/1000;
#else #else
struct timeval t; struct timeval t;
/* The following loop is here because gettimeofday may fail on some systems */ /*
The following loop is here because gettimeofday may fail on some systems
*/
while (gettimeofday(&t, NULL) != 0) while (gettimeofday(&t, NULL) != 0)
{} {}
newtime= (ulonglong)t.tv_sec * 1000000 + t.tv_usec; newtime= (ulonglong)t.tv_sec * 1000000 + t.tv_usec;
@ -131,18 +135,18 @@ ulonglong my_micro_time()
SYNOPSIS SYNOPSIS
my_micro_time_and_time() my_micro_time_and_time()
time_arg Will be set to seconds since epoch (00:00:00 UTC, January 1, time_arg Will be set to seconds since epoch (00:00:00 UTC,
1970) January 1, 1970)
NOTES NOTES
This function is to be useful when we need both the time and microtime. This function is to be useful when we need both the time and microtime.
For example in MySQL this is used to get the query time start of a query and For example in MySQL this is used to get the query time start of a query
to measure the time of a query (for the slow query log) and to measure the time of a query (for the slow query log)
IMPLEMENTATION IMPLEMENTATION
Value of time is as in time() call. Value of time is as in time() call.
Value of microtime is same as my_micro_time(), which may be totally unrealated Value of microtime is same as my_micro_time(), which may be totally
to time() unrealated to time()
RETURN RETURN
Value in microseconds from some undefined point in time Value in microseconds from some undefined point in time
@ -160,13 +164,13 @@ ulonglong my_micro_time_and_time(time_t *time_arg)
newtime/= (query_performance_frequency * 1000000); newtime/= (query_performance_frequency * 1000000);
} }
else else
newtime= (GetTickCount() * 1000); /* GetTickCount only returns milliseconds */ newtime= (GetTickCount() * 1000); /* GetTickCount only returns millisec. */
(void) time(time_arg); (void) time(time_arg);
return newtime; return newtime;
#elif defined(HAVE_GETHRTIME) #elif defined(HAVE_GETHRTIME)
/* /*
Solaris has a very slow time() call. We optimize this by using the very fast Solaris has a very slow time() call. We optimize this by using the very
gethrtime() call and only calling time() every 1/2 second fast gethrtime() call and only calling time() every 1/2 second
*/ */
static hrtime_t prev_gethrtime= 0; static hrtime_t prev_gethrtime= 0;
static time_t cur_time= 0; static time_t cur_time= 0;
@ -184,7 +188,9 @@ ulonglong my_micro_time_and_time(time_t *time_arg)
return cur_gethrtime/1000; return cur_gethrtime/1000;
#else #else
struct timeval t; struct timeval t;
/* The following loop is here because gettimeofday may fail on some systems */ /*
The following loop is here because gettimeofday may fail on some systems
*/
while (gettimeofday(&t, NULL) != 0) while (gettimeofday(&t, NULL) != 0)
{} {}
*time_arg= t.tv_sec; *time_arg= t.tv_sec;
@ -203,8 +209,8 @@ ulonglong my_micro_time_and_time(time_t *time_arg)
NOTES NOTES
This function returns the current time. The microtime argument is only used This function returns the current time. The microtime argument is only used
if my_micro_time() uses a function that can safely be converted to the current if my_micro_time() uses a function that can safely be converted to the
time. current time.
RETURN RETURN
current time current time