C++ (Cpp) update_grav示例

示例#1

文件： Gravity.cpp 项目： simtr/The-Powder-Toy

void Gravity::update_grav_async()
{
	int done = 0;
	int thread_done = 0;
	memset(th_ogravmap, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravmap, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravy, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravx, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravp, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	//memset(th_gravy, 0, XRES*YRES*sizeof(float));
	//memset(th_gravx, 0, XRES*YRES*sizeof(float));
	//memset(th_gravp, 0, XRES*YRES*sizeof(float));
#ifdef GRAVFFT
	if (!grav_fft_status)
		grav_fft_init();
#endif

	std::unique_lock<std::mutex> l(gravmutex);
	while (!thread_done)
	{
		if (!done)
		{
			// run gravity update
			update_grav();
			done = 1;
			grav_ready = 1;
			thread_done = gravthread_done;
		} else {
			// wait for main thread
			gravcv.wait(l);
			done = grav_ready;
			thread_done = gravthread_done;
		}
	}
}

示例#2

文件： gravity.c 项目： jacksonmj/The-Powder-Toy

void* update_grav_async(void* unused)
{
	int done = 0;
	int thread_done = 0;
	memset(th_ogravmap, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravmap, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravy, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravx, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravp, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	//memset(th_gravy, 0, XRES*YRES*sizeof(float));
	//memset(th_gravx, 0, XRES*YRES*sizeof(float));
	//memset(th_gravp, 0, XRES*YRES*sizeof(float));
#ifdef GRAVFFT
	grav_fft_init();
#endif
	while(!thread_done){
		if(!done){
			update_grav();
			done = 1;
			pthread_mutex_lock(&gravmutex);
			
			grav_ready = done;
			thread_done = gravthread_done;
			
			pthread_mutex_unlock(&gravmutex);
		} else {
			pthread_mutex_lock(&gravmutex);
			pthread_cond_wait(&gravcv, &gravmutex);
		    
			done = grav_ready;
			thread_done = gravthread_done;
			
			pthread_mutex_unlock(&gravmutex);
		}
	}
	pthread_exit(NULL);
}