| /* |
| * gptime |
| * define time-related functions used in GPDB |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| * IDENTIFICATION |
| * $Id$ |
| */ |
| #include "c.h" |
| |
| #include <sys/time.h> |
| |
| #ifdef HAVE_LIBRT |
| #include <time.h> |
| #endif |
| |
| #include "pgtime.h" |
| |
| /* |
| * gp_set_monotonic_begin_time: set the beginTime and endTime to the current |
| * time. |
| */ |
| void |
| gp_set_monotonic_begin_time(GpMonotonicTime *time) |
| { |
| time->beginTime.tv_sec = 0; |
| time->beginTime.tv_usec = 0; |
| time->endTime.tv_sec = 0; |
| time->endTime.tv_usec = 0; |
| |
| gp_get_monotonic_time(time); |
| |
| time->beginTime.tv_sec = time->endTime.tv_sec; |
| time->beginTime.tv_usec = time->endTime.tv_usec; |
| } |
| |
| |
| /* |
| * gp_get_monotonic_time |
| * This function returns the time in the monotonic order. |
| * |
| * The new time is stored in time->endTime, which has a larger value than |
| * the original value. The original endTime is lost. |
| * |
| * This function is intended for computing elapsed time between two |
| * calls. It is not for getting the system time. |
| */ |
| void |
| gp_get_monotonic_time(GpMonotonicTime *time) |
| { |
| struct timeval newTime; |
| int status; |
| |
| #if HAVE_LIBRT |
| /* Use clock_gettime to return monotonic time value. */ |
| struct timespec ts; |
| status = clock_gettime(CLOCK_MONOTONIC, &ts); |
| |
| newTime.tv_sec = ts.tv_sec; |
| newTime.tv_usec = ts.tv_nsec / 1000; |
| |
| #else |
| |
| gettimeofday(&newTime, NULL); |
| status = 0; /* gettimeofday always succeeds. */ |
| |
| #endif |
| |
| if (status == 0 && |
| timeCmp(&time->endTime, &newTime) < 0) |
| { |
| time->endTime.tv_sec = newTime.tv_sec; |
| time->endTime.tv_usec = newTime.tv_usec; |
| } |
| |
| else |
| { |
| time->endTime.tv_usec = time->endTime.tv_usec + 1; |
| |
| time->endTime.tv_sec = time->endTime.tv_sec + |
| (time->endTime.tv_usec / USECS_PER_SECOND); |
| time->endTime.tv_usec = time->endTime.tv_usec % USECS_PER_SECOND; |
| } |
| } |