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/*
* Copyright (c) 2015, Charlie Curtsinger and Emery Berger,
* University of Massachusetts Amherst
* This file is part of the Coz project. See LICENSE.md file at the top-level
* directory of this distribution and at http://github.com/plasma-umass/coz.
*/
#if !defined(CAUSAL_RUNTIME_UTIL_H)
#define CAUSAL_RUNTIME_UTIL_H
#if defined(__APPLE__)
#include <mach/mach_time.h>
#else
#include <time.h>
#endif
#include <signal.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <sstream>
#include <string>
#include <vector>
#include "real.h"
/**
* Get the current time in nanoseconds
*/
static size_t get_time() {
#if defined(__APPLE__)
return mach_absolute_time();
#else
struct timespec ts;
if(clock_gettime(CLOCK_REALTIME, &ts)) {
perror("get_time():");
abort();
}
return ts.tv_nsec + ts.tv_sec * 1000 * 1000 * 1000;
#endif
}
static inline size_t wait(size_t ns) {
if(ns == 0) return 0;
struct timespec ts;
ts.tv_nsec = ns % (1000 * 1000 * 1000);
ts.tv_sec = (ns - ts.tv_nsec) / (1000 * 1000 * 1000);
size_t start_time = get_time();
while(nanosleep(&ts, &ts) != 0) {}
return get_time() - start_time;
}
static inline std::vector<std::string> split(const std::string& s, char delim='\t') {
std::vector<std::string> elems;
std::stringstream ss(s);
std::string item;
while (std::getline(ss, item, delim)) {
if(item.length()) elems.push_back(item);
}
return elems;
}
static inline std::string getenv_safe(const char* var, const char* fallback = "") {
const char* value = getenv(var);
if(!value) value = fallback;
return std::string(value);
}
#endif
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