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/*
*
* 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.
*
*/
#ifndef GRPC_SUPPORT_TIME_H
#define GRPC_SUPPORT_TIME_H
#include <grpc/support/port_platform.h>
#include <stddef.h>
#include <time.h>
#include <grpc/impl/codegen/gpr_types.h>
#ifdef __cplusplus
extern "C" {
#endif
/** Time constants. */
GPRAPI gpr_timespec
gpr_time_0(gpr_clock_type type); /** The zero time interval. */
GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /** The far future */
GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type); /** The far past. */
#define GPR_MS_PER_SEC 1000
#define GPR_US_PER_SEC 1000000
#define GPR_NS_PER_SEC 1000000000
#define GPR_NS_PER_MS 1000000
#define GPR_NS_PER_US 1000
#define GPR_US_PER_MS 1000
/** initialize time subsystem */
GPRAPI void gpr_time_init(void);
/** Return the current time measured from the given clocks epoch. */
GPRAPI gpr_timespec gpr_now(gpr_clock_type clock);
/** Convert a timespec from one clock to another */
GPRAPI gpr_timespec gpr_convert_clock_type(gpr_timespec t,
gpr_clock_type clock_type);
/** Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
respectively. */
GPRAPI int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
GPRAPI gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
GPRAPI gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
/** Add and subtract times. Calculations saturate at infinities. */
GPRAPI gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
GPRAPI gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
/** Return a timespec representing a given number of time units. INT64_MIN is
interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future. */
GPRAPI gpr_timespec gpr_time_from_micros(int64_t us, gpr_clock_type clock_type);
GPRAPI gpr_timespec gpr_time_from_nanos(int64_t ns, gpr_clock_type clock_type);
GPRAPI gpr_timespec gpr_time_from_millis(int64_t ms, gpr_clock_type clock_type);
GPRAPI gpr_timespec gpr_time_from_seconds(int64_t s, gpr_clock_type clock_type);
GPRAPI gpr_timespec gpr_time_from_minutes(int64_t m, gpr_clock_type clock_type);
GPRAPI gpr_timespec gpr_time_from_hours(int64_t h, gpr_clock_type clock_type);
GPRAPI int32_t gpr_time_to_millis(gpr_timespec timespec);
/** Return 1 if two times are equal or within threshold of each other,
0 otherwise */
GPRAPI int gpr_time_similar(gpr_timespec a, gpr_timespec b,
gpr_timespec threshold);
/** Sleep until at least 'until' - an absolute timeout */
GPRAPI void gpr_sleep_until(gpr_timespec until);
GPRAPI double gpr_timespec_to_micros(gpr_timespec t);
#ifdef __cplusplus
}
#endif
#endif /* GRPC_SUPPORT_TIME_H */
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