The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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128 lines
4.8 KiB
128 lines
4.8 KiB
/* |
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* |
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* Copyright 2015, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#ifndef GRPC_SUPPORT_TIME_H |
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#define GRPC_SUPPORT_TIME_H |
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/* Time support. |
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We use gpr_timespec, which is analogous to struct timespec. On some |
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machines, absolute times may be in local time. */ |
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#include <grpc/support/port_platform.h> |
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#include <stddef.h> |
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#include <time.h> |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* The clocks we support. */ |
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typedef enum { |
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/* Monotonic clock. Epoch undefined. Always moves forwards. */ |
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GPR_CLOCK_MONOTONIC = 0, |
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/* Realtime clock. May jump forwards or backwards. Settable by |
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the system administrator. Has its epoch at 0:00:00 UTC 1 Jan 1970. */ |
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GPR_CLOCK_REALTIME, |
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/* CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch |
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undefined. Degrades to GPR_CLOCK_REALTIME on other platforms. */ |
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GPR_CLOCK_PRECISE, |
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/* Unmeasurable clock type: no base, created by taking the difference |
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between two times */ |
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GPR_TIMESPAN |
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} gpr_clock_type; |
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typedef struct gpr_timespec { |
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gpr_int64 tv_sec; |
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gpr_int32 tv_nsec; |
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/** Against which clock was this time measured? (or GPR_TIMESPAN if |
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this is a relative time meaure) */ |
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gpr_clock_type clock_type; |
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} gpr_timespec; |
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/* Time constants. */ |
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gpr_timespec gpr_time_0(gpr_clock_type type); /* The zero time interval. */ |
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gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */ |
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gpr_timespec gpr_inf_past(gpr_clock_type type); /* The far past. */ |
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#define GPR_MS_PER_SEC 1000 |
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#define GPR_US_PER_SEC 1000000 |
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#define GPR_NS_PER_SEC 1000000000 |
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#define GPR_NS_PER_MS 1000000 |
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#define GPR_NS_PER_US 1000 |
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#define GPR_US_PER_MS 1000 |
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/* initialize time subsystem */ |
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void gpr_time_init(void); |
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/* Return the current time measured from the given clocks epoch. */ |
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gpr_timespec gpr_now(gpr_clock_type clock); |
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/* Convert a timespec from one clock to another */ |
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gpr_timespec gpr_convert_clock_type(gpr_timespec t, |
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gpr_clock_type target_clock); |
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/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b |
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respectively. */ |
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int gpr_time_cmp(gpr_timespec a, gpr_timespec b); |
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gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b); |
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gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b); |
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/* Add and subtract times. Calculations saturate at infinities. */ |
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gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b); |
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gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b); |
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/* Return a timespec representing a given number of time units. LONG_MIN is |
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interpreted as gpr_inf_past, and LONG_MAX as gpr_inf_future. */ |
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gpr_timespec gpr_time_from_micros(long x, gpr_clock_type clock_type); |
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gpr_timespec gpr_time_from_nanos(long x, gpr_clock_type clock_type); |
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gpr_timespec gpr_time_from_millis(long x, gpr_clock_type clock_type); |
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gpr_timespec gpr_time_from_seconds(long x, gpr_clock_type clock_type); |
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gpr_timespec gpr_time_from_minutes(long x, gpr_clock_type clock_type); |
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gpr_timespec gpr_time_from_hours(long x, gpr_clock_type clock_type); |
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gpr_int32 gpr_time_to_millis(gpr_timespec timespec); |
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/* Return 1 if two times are equal or within threshold of each other, |
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0 otherwise */ |
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int gpr_time_similar(gpr_timespec a, gpr_timespec b, gpr_timespec threshold); |
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/* Sleep until at least 'until' - an absolute timeout */ |
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void gpr_sleep_until(gpr_timespec until); |
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double gpr_timespec_to_micros(gpr_timespec t); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* GRPC_SUPPORT_TIME_H */
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