diff options
Diffstat (limited to 'src/include/portability/instr_time.h')
| -rw-r--r-- | src/include/portability/instr_time.h | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h index 666d495f203..7f4a0923b69 100644 --- a/src/include/portability/instr_time.h +++ b/src/include/portability/instr_time.h @@ -20,6 +20,8 @@ * * INSTR_TIME_SET_CURRENT(t) set t to current time * + * INSTR_TIME_ADD(x, y) x += y + * * INSTR_TIME_SUBTRACT(x, y) x -= y * * INSTR_TIME_ACCUM_DIFF(x, y, z) x += (y - z) @@ -35,15 +37,15 @@ * only useful on intervals. * * When summing multiple measurements, it's recommended to leave the - * running sum in instr_time form (ie, use INSTR_TIME_ACCUM_DIFF) and - * convert to a result format only at the end. + * running sum in instr_time form (ie, use INSTR_TIME_ADD or + * INSTR_TIME_ACCUM_DIFF) and convert to a result format only at the end. * * Beware of multiple evaluations of the macro arguments. * * * Copyright (c) 2001-2008, PostgreSQL Global Development Group * - * $PostgreSQL: pgsql/src/include/portability/instr_time.h,v 1.1 2008/05/14 19:10:29 tgl Exp $ + * $PostgreSQL: pgsql/src/include/portability/instr_time.h,v 1.2 2008/05/15 00:17:41 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -62,6 +64,18 @@ typedef struct timeval instr_time; #define INSTR_TIME_SET_CURRENT(t) gettimeofday(&(t), NULL) +#define INSTR_TIME_ADD(x,y) \ + do { \ + (x).tv_sec += (y).tv_sec; \ + (x).tv_usec += (y).tv_usec; \ + /* Normalize */ \ + while ((x).tv_usec >= 1000000) \ + { \ + (x).tv_usec -= 1000000; \ + (x).tv_sec++; \ + } \ + } while (0) + #define INSTR_TIME_SUBTRACT(x,y) \ do { \ (x).tv_sec -= (y).tv_sec; \ @@ -110,6 +124,9 @@ typedef LARGE_INTEGER instr_time; #define INSTR_TIME_SET_CURRENT(t) QueryPerformanceCounter(&(t)) +#define INSTR_TIME_ADD(x,y) \ + ((x).QuadPart += (y).QuadPart) + #define INSTR_TIME_SUBTRACT(x,y) \ ((x).QuadPart -= (y).QuadPart) |