Function stamp_sub

lib_acl_cpp/samples/atomic/main.cpp:3–17

#include "acl_cpp/lib_acl.hpp"

double stamp_sub(const struct timeval *from, const struct timeval *sub)
{
	struct timeval res;

	memcpy(&res, from, sizeof(struct timeval));

	res.tv_usec -= sub->tv_usec;
	if (res.tv_usec < 0) {
		--res.tv_sec;
		res.tv_usec += 1000000;
	}
	res.tv_sec -= sub->tv_sec;

	return (res.tv_sec * 1000.0 + res.tv_usec/1000.0);
}

class mythread : public acl::thread
{