| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <grpc/support/port_platform.h> |
| #include <src/core/support/time_precise.h> |
| |
| #ifdef GPR_POSIX_TIME |
| |
| #include <stdlib.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/time.h> |
| #include "src/core/support/block_annotate.h" |
| |
| static struct timespec timespec_from_gpr(gpr_timespec gts) { |
| struct timespec rv; |
| rv.tv_sec = gts.tv_sec; |
| rv.tv_nsec = gts.tv_nsec; |
| return rv; |
| } |
| |
| #if _POSIX_TIMERS > 0 |
| static gpr_timespec gpr_from_timespec(struct timespec ts, |
| gpr_clock_type clock_type) { |
| gpr_timespec rv; |
| rv.tv_sec = ts.tv_sec; |
| rv.tv_nsec = (int)ts.tv_nsec; |
| rv.clock_type = clock_type; |
| return rv; |
| } |
| |
| /** maps gpr_clock_type --> clockid_t for clock_gettime */ |
| static clockid_t clockid_for_gpr_clock[] = {CLOCK_MONOTONIC, CLOCK_REALTIME}; |
| |
| void gpr_time_init(void) { gpr_precise_clock_init(); } |
| |
| gpr_timespec gpr_now(gpr_clock_type clock_type) { |
| struct timespec now; |
| GPR_ASSERT(clock_type != GPR_TIMESPAN); |
| if (clock_type == GPR_CLOCK_PRECISE) { |
| gpr_timespec ret; |
| gpr_precise_clock_now(&ret); |
| return ret; |
| } else { |
| clock_gettime(clockid_for_gpr_clock[clock_type], &now); |
| return gpr_from_timespec(now, clock_type); |
| } |
| } |
| #else |
| /* For some reason Apple's OSes haven't implemented clock_gettime. */ |
| |
| #include <sys/time.h> |
| #include <mach/mach.h> |
| #include <mach/mach_time.h> |
| |
| static double g_time_scale; |
| static uint64_t g_time_start; |
| |
| void gpr_time_init(void) { |
| mach_timebase_info_data_t tb = {0, 1}; |
| mach_timebase_info(&tb); |
| g_time_scale = tb.numer; |
| g_time_scale /= tb.denom; |
| g_time_start = mach_absolute_time(); |
| } |
| |
| gpr_timespec gpr_now(gpr_clock_type clock) { |
| gpr_timespec now; |
| struct timeval now_tv; |
| double now_dbl; |
| |
| now.clock_type = clock; |
| switch (clock) { |
| case GPR_CLOCK_REALTIME: |
| gettimeofday(&now_tv, NULL); |
| now.tv_sec = now_tv.tv_sec; |
| now.tv_nsec = now_tv.tv_usec * 1000; |
| break; |
| case GPR_CLOCK_MONOTONIC: |
| now_dbl = (mach_absolute_time() - g_time_start) * g_time_scale; |
| now.tv_sec = (time_t)(now_dbl * 1e-9); |
| now.tv_nsec = (int)(now_dbl - ((double)now.tv_sec) * 1e9); |
| break; |
| case GPR_CLOCK_PRECISE: |
| gpr_precise_clock_now(&now); |
| break; |
| case GPR_TIMESPAN: |
| abort(); |
| } |
| |
| return now; |
| } |
| #endif |
| |
| void gpr_sleep_until(gpr_timespec until) { |
| gpr_timespec now; |
| gpr_timespec delta; |
| struct timespec delta_ts; |
| int ns_result; |
| |
| for (;;) { |
| /* We could simplify by using clock_nanosleep instead, but it might be |
| * slightly less portable. */ |
| now = gpr_now(until.clock_type); |
| if (gpr_time_cmp(until, now) <= 0) { |
| return; |
| } |
| |
| delta = gpr_time_sub(until, now); |
| delta_ts = timespec_from_gpr(delta); |
| GRPC_SCHEDULING_START_BLOCKING_REGION; |
| ns_result = nanosleep(&delta_ts, NULL); |
| GRPC_SCHEDULING_END_BLOCKING_REGION; |
| if (ns_result == 0) { |
| break; |
| } |
| } |
| } |
| |
| #endif /* GPR_POSIX_TIME */ |