| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed 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. |
| * |
| */ |
| |
| /* Win32 code for gpr time support. */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #ifdef GPR_WINDOWS_TIME |
| |
| #include <grpc/support/log.h> |
| #include <grpc/support/time.h> |
| #include <limits.h> |
| #include <process.h> |
| #include <sys/timeb.h> |
| |
| #include "src/core/lib/gpr/time_precise.h" |
| |
| static LARGE_INTEGER g_start_time; |
| static double g_time_scale; |
| |
| void gpr_time_init(void) { |
| LARGE_INTEGER frequency; |
| QueryPerformanceFrequency(&frequency); |
| QueryPerformanceCounter(&g_start_time); |
| g_time_scale = 1.0 / (double)frequency.QuadPart; |
| } |
| |
| static gpr_timespec now_impl(gpr_clock_type clock) { |
| gpr_timespec now_tv; |
| LONGLONG diff; |
| struct _timeb now_tb; |
| LARGE_INTEGER timestamp; |
| double now_dbl; |
| now_tv.clock_type = clock; |
| switch (clock) { |
| case GPR_CLOCK_REALTIME: |
| _ftime_s(&now_tb); |
| now_tv.tv_sec = (int64_t)now_tb.time; |
| now_tv.tv_nsec = now_tb.millitm * 1000000; |
| break; |
| case GPR_CLOCK_MONOTONIC: |
| case GPR_CLOCK_PRECISE: |
| QueryPerformanceCounter(×tamp); |
| diff = timestamp.QuadPart - g_start_time.QuadPart; |
| now_dbl = (double)diff * g_time_scale; |
| now_tv.tv_sec = (int64_t)now_dbl; |
| now_tv.tv_nsec = (int32_t)((now_dbl - (double)now_tv.tv_sec) * 1e9); |
| break; |
| case GPR_TIMESPAN: |
| abort(); |
| break; |
| } |
| return now_tv; |
| } |
| |
| gpr_timespec (*gpr_now_impl)(gpr_clock_type clock_type) = now_impl; |
| |
| gpr_timespec gpr_now(gpr_clock_type clock_type) { |
| return gpr_now_impl(clock_type); |
| } |
| |
| void gpr_sleep_until(gpr_timespec until) { |
| gpr_timespec now; |
| gpr_timespec delta; |
| int64_t sleep_millis; |
| |
| 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); |
| sleep_millis = |
| delta.tv_sec * GPR_MS_PER_SEC + delta.tv_nsec / GPR_NS_PER_MS; |
| GPR_ASSERT((sleep_millis >= 0) && (sleep_millis <= INT_MAX)); |
| Sleep((DWORD)sleep_millis); |
| } |
| } |
| |
| #endif /* GPR_WINDOWS_TIME */ |