1 /* 2 * 3 * Copyright 2016 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPC_IMPL_CODEGEN_GPR_TYPES_H 20 #define GRPC_IMPL_CODEGEN_GPR_TYPES_H 21 22 #include <grpc/impl/codegen/port_platform.h> 23 24 #include <stddef.h> 25 26 #ifdef __cplusplus 27 extern "C" { 28 #endif 29 30 /** The clocks we support. */ 31 typedef enum { 32 /** Monotonic clock. Epoch undefined. Always moves forwards. */ 33 GPR_CLOCK_MONOTONIC = 0, 34 /** Realtime clock. May jump forwards or backwards. Settable by 35 the system administrator. Has its epoch at 0:00:00 UTC 1 Jan 1970. */ 36 GPR_CLOCK_REALTIME, 37 /** CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch 38 undefined. Degrades to GPR_CLOCK_REALTIME on other platforms. */ 39 GPR_CLOCK_PRECISE, 40 /** Unmeasurable clock type: no base, created by taking the difference 41 between two times */ 42 GPR_TIMESPAN 43 } gpr_clock_type; 44 45 /** Analogous to struct timespec. On some machines, absolute times may be in 46 * local time. */ 47 typedef struct gpr_timespec { 48 int64_t tv_sec; 49 int32_t tv_nsec; 50 /** Against which clock was this time measured? (or GPR_TIMESPAN if 51 this is a relative time meaure) */ 52 gpr_clock_type clock_type; 53 } gpr_timespec; 54 55 #ifdef __cplusplus 56 } 57 #endif 58 59 #endif /* GRPC_IMPL_CODEGEN_GPR_TYPES_H */ 60