blob: 39bca1b094009cf1d433fad167201915a0e4c6f8 [file] [log] [blame]
/*
*
* 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 <limits.h>
#include <process.h>
#include <sys/timeb.h>
#include <grpc/support/log.h>
#include <grpc/support/time.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(&timestamp);
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 */