/* * Copyright (C) 2005 The Android Open Source Project * * 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. */ // // Timer functions. // #include <utils/Timers.h> #include <limits.h> #include <time.h> #if defined(__ANDROID__) nsecs_t systemTime(int clock) { static const clockid_t clocks[] = { CLOCK_REALTIME, CLOCK_MONOTONIC, CLOCK_PROCESS_CPUTIME_ID, CLOCK_THREAD_CPUTIME_ID, CLOCK_BOOTTIME }; struct timespec t; t.tv_sec = t.tv_nsec = 0; clock_gettime(clocks[clock], &t); return nsecs_t(t.tv_sec)*1000000000LL + t.tv_nsec; } #else nsecs_t systemTime(int /*clock*/) { // Clock support varies widely across hosts. Mac OS doesn't support // posix clocks, older glibcs don't support CLOCK_BOOTTIME and Windows // is windows. struct timeval t; t.tv_sec = t.tv_usec = 0; gettimeofday(&t, NULL); return nsecs_t(t.tv_sec)*1000000000LL + nsecs_t(t.tv_usec)*1000LL; } #endif int toMillisecondTimeoutDelay(nsecs_t referenceTime, nsecs_t timeoutTime) { nsecs_t timeoutDelayMillis; if (timeoutTime > referenceTime) { uint64_t timeoutDelay = uint64_t(timeoutTime - referenceTime); if (timeoutDelay > uint64_t((INT_MAX - 1) * 1000000LL)) { timeoutDelayMillis = -1; } else { timeoutDelayMillis = (timeoutDelay + 999999LL) / 1000000LL; } } else { timeoutDelayMillis = 0; } return (int)timeoutDelayMillis; }