1*71db0c75SAndroid Build Coastguard Worker //===---------- GPU implementation of the POSIX clock_gettime function ----===// 2*71db0c75SAndroid Build Coastguard Worker // 3*71db0c75SAndroid Build Coastguard Worker // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*71db0c75SAndroid Build Coastguard Worker // See https://llvm.org/LICENSE.txt for license information. 5*71db0c75SAndroid Build Coastguard Worker // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*71db0c75SAndroid Build Coastguard Worker // 7*71db0c75SAndroid Build Coastguard Worker //===----------------------------------------------------------------------===// 8*71db0c75SAndroid Build Coastguard Worker 9*71db0c75SAndroid Build Coastguard Worker #include "src/time/clock_gettime.h" 10*71db0c75SAndroid Build Coastguard Worker 11*71db0c75SAndroid Build Coastguard Worker #include "src/__support/common.h" 12*71db0c75SAndroid Build Coastguard Worker #include "src/__support/macros/config.h" 13*71db0c75SAndroid Build Coastguard Worker #include "time_utils.h" 14*71db0c75SAndroid Build Coastguard Worker 15*71db0c75SAndroid Build Coastguard Worker namespace LIBC_NAMESPACE_DECL { 16*71db0c75SAndroid Build Coastguard Worker 17*71db0c75SAndroid Build Coastguard Worker constexpr uint64_t TICKS_PER_SEC = 1000000000UL; 18*71db0c75SAndroid Build Coastguard Worker 19*71db0c75SAndroid Build Coastguard Worker LLVM_LIBC_FUNCTION(int, clock_gettime, (clockid_t clockid, timespec *ts)) { 20*71db0c75SAndroid Build Coastguard Worker if (clockid != CLOCK_MONOTONIC || !ts) 21*71db0c75SAndroid Build Coastguard Worker return -1; 22*71db0c75SAndroid Build Coastguard Worker 23*71db0c75SAndroid Build Coastguard Worker uint64_t ns_per_tick = TICKS_PER_SEC / GPU_CLOCKS_PER_SEC; 24*71db0c75SAndroid Build Coastguard Worker uint64_t ticks = gpu::fixed_frequency_clock(); 25*71db0c75SAndroid Build Coastguard Worker 26*71db0c75SAndroid Build Coastguard Worker ts->tv_nsec = (ticks * ns_per_tick) % TICKS_PER_SEC; 27*71db0c75SAndroid Build Coastguard Worker ts->tv_sec = (ticks * ns_per_tick) / TICKS_PER_SEC; 28*71db0c75SAndroid Build Coastguard Worker 29*71db0c75SAndroid Build Coastguard Worker return 0; 30*71db0c75SAndroid Build Coastguard Worker } 31*71db0c75SAndroid Build Coastguard Worker 32*71db0c75SAndroid Build Coastguard Worker } // namespace LIBC_NAMESPACE_DECL 33