--- ray/src/util/rad.c	2003/06/30 14:59:13	2.65
+++ ray/src/util/rad.c	2003/07/21 22:30:19	2.70
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rad.c,v 2.65 2003/06/30 14:59:13 schorsch Exp $";
+static const char	RCSid[] = "$Id: rad.c,v 2.70 2003/07/21 22:30:19 schorsch Exp $";
 #endif
 /*
  * Executive program for oconv, rpict and pfilt
@@ -8,12 +8,21 @@ static const char	RCSid[] = "$Id: rad.c,v 2.65 2003/06
 #include "standard.h"
 
 #include <ctype.h>
+#include <time.h>
 
 #include "platform.h"
 #include "view.h"
 #include "paths.h"
 #include "vars.h"
 
+#ifdef _WIN32
+  #define DELCMD "del"
+  #define RENAMECMD "rename"
+#else
+  #define DELCMD "rm -f"
+  #define RENAMECMD "mv"
+#endif
+
 				/* variables (alphabetical by name) */
 #define AMBFILE		0		/* ambient file name */
 #define DETAIL		1		/* level of scene detail */
@@ -80,7 +89,6 @@ char	overfile[] = NULL_DEVICE;
 char	overfile[] = "overture.unf";
 #endif
 
-extern time_t	time();
 
 time_t	scenedate;		/* date of latest scene or object file */
 time_t	octreedate;		/* date of octree */
@@ -96,19 +104,23 @@ int	nowarn = 0;		/* no warnings */
 int	explicate = 0;		/* explicate variables */
 int	silent = 0;		/* do work silently */
 int	touchonly = 0;		/* touch files only */
-int	noaction = 0;		/* don't do anything */
+int	nprocs = 1;		/* maximum executing processes */
 int	sayview = 0;		/* print view out */
 char	*rvdevice = NULL;	/* rview output device */
 char	*viewselect = NULL;	/* specific view only */
 
 int	overture = 0;		/* overture calculation needed */
 
+int	children_running = 0;	/* set negative in children */
+
 char	*progname;		/* global argv[0] */
 char	*rifname;		/* global rad input file name */
 
 char	radname[PATH_MAX];	/* root Radiance file name */
 
+#define	inchild()	(children_running < 0)
 
+
 main(argc, argv)
 int	argc;
 char	*argv[];
@@ -125,8 +137,13 @@ char	*argv[];
 			silent++;
 			break;
 		case 'n':
-			noaction++;
+			nprocs = 0;
 			break;
+		case 'N':
+			nprocs = atoi(argv[++i]);
+			if (nprocs < 0)
+				nprocs = 0;
+			break;
 		case 't':
 			touchonly++;
 			break;
@@ -151,6 +168,9 @@ char	*argv[];
 	if (i >= argc)
 		goto userr;
 	rifname = argv[i];
+				/* check command-line options */
+	if (nprocs > 1 & viewselect != NULL)
+		nprocs = 1;
 				/* assign Radiance root file name */
 	rootname(radname, rifname);
 				/* load variable values */
@@ -185,7 +205,7 @@ char	*argv[];
 	quit(0);
 userr:
 	fprintf(stderr,
-"Usage: %s [-w][-s][-n][-t][-e][-V][-v view][-o dev] rfile [VAR=value ..]\n",
+"Usage: %s [-w][-s][-n|-N npr][-t][-e][-V][-v view][-o dev] rfile [VAR=value ..]\n",
 			progname);
 	quit(1);
 }
@@ -298,8 +318,8 @@ double	org[3], *sizp;
 	FILE	*fp;
 	register int	i;
 
-	if (osiz <= FTINY)
-		if (noaction && fdate(oct1name) <
+	if (osiz <= FTINY) {
+		if (!nprocs && fdate(oct1name) <
 				(scenedate>illumdate?scenedate:illumdate)) {
 							/* run getbbox */
 			sprintf(buf, "getbbox -w -h %s",
@@ -334,6 +354,7 @@ double	org[3], *sizp;
 			}
 			pclose(fp);
 		}
+	}
 	org[0] = oorg[0]; org[1] = oorg[1]; org[2] = oorg[2]; *sizp = osiz;
 }
 
@@ -538,11 +559,12 @@ checkambfile()			/* check date on ambient file */
 		return;
 	if (!(afdate = fdate(vval(AMBFILE))))
 		return;
-	if (oct1date > afdate)
+	if (oct1date > afdate) {
 		if (touchonly)
 			touch(vval(AMBFILE));
 		else
 			rmfile(vval(AMBFILE));
+	}
 }
 
 
@@ -1030,8 +1052,10 @@ char	*vn;		/* returned view name */
 }
 
 
-printview(vopts)			/* print out selected view */
+int
+myprintview(vopts, fp)			/* print out selected view */
 register char	*vopts;
+FILE	*fp;
 {
 	VIEW	vwr;
 	char	buf[128];
@@ -1045,16 +1069,16 @@ again:
 		goto again;
 	}
 #endif
-	copystruct(&vwr, &stdview);
+	vwr = stdview;
 	sscanview(&vwr, cp=vopts);		/* set initial options */
 	while ((cp = strstr(cp, "-vf ")) != NULL &&
 			*atos(buf, sizeof(buf), cp += 4)) {
 		viewfile(buf, &vwr, NULL);	/* load -vf file */
 		sscanview(&vwr, cp);		/* reset tail */
 	}
-	fputs(VIEWSTR, stdout);
-	fprintview(&vwr, stdout);		/* print full spec. */
-	fputc('\n', stdout);
+	fputs(VIEWSTR, fp);
+	fprintview(&vwr, fp);			/* print full spec. */
+	fputc('\n', fp);
 	return(0);
 }
 
@@ -1068,7 +1092,7 @@ char	*opts, *po;
 	if (touchonly || (vw = getview(0, NULL)) == NULL)
 		return;
 	if (sayview)
-		printview(vw);
+		myprintview(vw, stdout);
 	sprintf(combuf, "rview %s%s%s -R %s ", vw, po, opts, rifname);
 	if (rvdevice != NULL)
 		sprintf(combuf+strlen(combuf), "-o %s ", rvdevice);
@@ -1088,9 +1112,11 @@ char	*opts, *po;
 	char	combuf[PATH_MAX];
 	char	rawfile[PATH_MAX], picfile[PATH_MAX];
 	char	zopt[PATH_MAX+4], rep[PATH_MAX+16], res[32];
+	char	rppopt[128], *pfile = NULL;
 	char	pfopts[128];
 	char	vs[32], *vw;
 	int	vn, mult;
+	FILE	*fp;
 	time_t	rfdt, pfdt;
 					/* get pfilt options */
 	pfiltopts(pfopts);
@@ -1132,11 +1158,17 @@ char	*opts, *po;
 		else
 			badvalue(REPORT);
 	}
-					/* do each view */
-	vn = 0;
+					/* set up parallel rendering */
+	if (nprocs > 1 & !vdef(ZFILE)) {
+		strcpy(rppopt, "-S 1 -PP pfXXXXXX");
+		pfile = rppopt+9;
+		if (mktemp(pfile) == NULL)
+			pfile = NULL;
+	}
+	vn = 0;					/* do each view */
 	while ((vw = getview(vn++, vs)) != NULL) {
 		if (sayview)
-			printview(vw);
+			myprintview(vw, stdout);
 		if (!vs[0])
 			sprintf(vs, "%d", vn);
 		sprintf(picfile, "%s_%s.pic", vval(PICTURE), vs);
@@ -1160,11 +1192,19 @@ char	*opts, *po;
 				touch(picfile);
 			continue;
 		}
+		if (next_process()) {		/* parallel running? */
+			if (pfile != NULL)
+				sleep(20);
+			continue;
+		}
+		/* XXX Remember to call finish_process() */
 						/* build rpict command */
-		if (rfdt >= oct1date)		/* recover */
+		if (rfdt >= oct1date) {		/* recover */
 			sprintf(combuf, "rpict%s%s%s%s -ro %s %s",
 				rep, po, opts, zopt, rawfile, oct1name);
-		else {
+			if (runcom(combuf))	/* run rpict */
+				goto rperror;
+		} else {
 			if (overture) {		/* run overture calculation */
 				sprintf(combuf,
 				"rpict%s %s%s -x 64 -y 64 -ps 1 %s > %s",
@@ -1181,14 +1221,27 @@ char	*opts, *po;
 #endif
 			}
 			sprintf(combuf, "rpict%s %s %s%s%s%s %s > %s",
-					rep, vw, res, po, opts, zopt,
-					oct1name, rawfile);
+					rep, vw, res, po, opts,
+					zopt, oct1name, rawfile);
+			if (pfile != NULL && inchild()) {
+						/* rpict persistent mode */
+				if (!silent)
+					printf("\t%s\n", combuf);
+				sprintf(combuf, "rpict%s %s %s%s%s %s > %s",
+						rep, rppopt, res, po, opts,
+						oct1name, rawfile);
+				fflush(stdout);
+				fp = popen(combuf, "w");
+				if (fp == NULL)
+					goto rperror;
+				myprintview(vw, fp);
+				if (pclose(fp))
+					goto rperror;
+			} else {		/* rpict normal mode */
+				if (runcom(combuf))
+					goto rperror;
+			}
 		}
-		if (runcom(combuf)) {		/* run rpict */
-			fprintf(stderr, "%s: error rendering view %s\n",
-					progname, vs);
-			quit(1);
-		}
 		if (!vdef(RAWFILE) || strcmp(vval(RAWFILE),vval(PICTURE))) {
 						/* build pfilt command */
 			if (mult > 1)
@@ -1197,7 +1250,7 @@ char	*opts, *po;
 			else
 				sprintf(combuf, "pfilt%s %s > %s", pfopts,
 						rawfile, picfile);
-			if (runcom(combuf)) {		/* run pfilt */
+			if (runcom(combuf)) {	/* run pfilt */
 				fprintf(stderr,
 				"%s: error filtering view %s\n\t%s removed\n",
 						progname, vs, picfile);
@@ -1211,7 +1264,23 @@ char	*opts, *po;
 			mvfile(rawfile, combuf);
 		} else
 			rmfile(rawfile);
+		finish_process();		/* leave if child */
 	}
+	wait_process(1);		/* wait for children to finish */
+	if (pfile != NULL) {		/* clean up rpict persistent mode */
+		int	pid;
+		fp = fopen(pfile, "r");
+		if (fp != NULL) {
+			if (fscanf(fp, "%*s %d", &pid) != 1 ||
+					kill(pid, 1) == -1)
+				unlink(pfile);
+			fclose(fp);
+		}
+	}
+	return;
+rperror:
+	fprintf(stderr, "%s: error rendering view %s\n", progname, vs);
+	quit(1);
 }
 
 
@@ -1220,7 +1289,7 @@ char	*fn;
 {
 	if (!silent)
 		printf("\ttouch %s\n", fn);
-	if (noaction)
+	if (!nprocs)
 		return(0);
 #ifdef notused
 	if (access(fn, F_OK) == -1)		/* create it */
@@ -1236,7 +1305,7 @@ char	*cs;
 {
 	if (!silent)		/* echo it */
 		printf("\t%s\n", cs);
-	if (noaction)
+	if (!nprocs)
 		return(0);
 	fflush(stdout);		/* flush output and pass to shell */
 	return(system(cs));
@@ -1247,12 +1316,8 @@ rmfile(fn)			/* remove a file */
 char	*fn;
 {
 	if (!silent)
-#ifdef _WIN32
-		printf("\tdel %s\n", fn);
-#else
-		printf("\trm -f %s\n", fn);
-#endif
-	if (noaction)
+		printf("\t%s %s\n", DELCMD, fn);
+	if (!nprocs)
 		return(0);
 	return(unlink(fn));
 }
@@ -1262,16 +1327,94 @@ mvfile(fold, fnew)		/* move a file */
 char	*fold, *fnew;
 {
 	if (!silent)
-#ifdef _WIN32
-		printf("\trename %s %s\n", fold, fnew);
-#else
-		printf("\tmv %s %s\n", fold, fnew);
-#endif
-	if (noaction)
+		printf("\t%s %s %s\n", RENAMECMD, fold, fnew);
+	if (!nprocs)
 		return(0);
 	return(rename(fold, fnew));
 }
 
+
+#ifdef RHAS_FORK_EXEC
+int
+next_process()			/* fork the next process (max. nprocs) */
+{
+	int	child_pid;
+
+	if (nprocs <= 1)
+		return(0);		/* it's us or no one */
+	if (inchild()) {
+		fprintf(stderr, "%s: internal error 1 in spawn_process()\n",
+				progname);
+		quit(1);
+	}
+	if (children_running >= nprocs)
+		wait_process(0);	/* wait for someone to finish */
+	fflush(stdout);
+	child_pid = fork();		/* split process */
+	if (child_pid == 0) {		/* we're the child */
+		children_running = -1;
+		return(0);
+	}
+	if (child_pid > 0) {		/* we're the parent */
+		++children_running;
+		return(1);
+	}
+	fprintf(stderr, "%s: warning -- fork() failed\n", progname);
+	return(0);
+}
+
+wait_process(all)			/* wait for process(es) to finish */
+int	all;
+{
+	int	ourstatus = 0;
+	int	pid, status;
+
+	if (all)
+		all = children_running;
+	else if (children_running > 0)
+		all = 1;
+	while (all-- > 0) {
+		pid = wait(&status);
+		if (pid < 0)
+			syserr(progname);
+		status = status>>8 & 0xff;
+		--children_running;
+		if (status != 0) {	/* child's problem is our problem */
+			if (ourstatus == 0 & children_running > 0)
+				fprintf(stderr, "%s: waiting for remaining processes\n",
+						progname);
+			ourstatus = status;
+			all = children_running;
+		}
+	}
+	if (ourstatus != 0)
+		quit(ourstatus);	/* bad status from child */
+}
+#else	/* ! RHAS_FORK_EXEC */
+int
+next_process()
+{
+	return(0);			/* cannot start new process */
+}
+wait_process(all)
+int	all;
+{
+	(void)all;			/* no one to wait for */
+}
+int
+kill(pid, sig) /* win|unix_process.c should also wait and kill */
+int pid, sig;
+{
+	return 0;
+}
+#endif	/* ! RHAS_FORK_EXEC */
+
+finish_process()			/* exit a child process */
+{
+	if (!inchild())
+		return;			/* in parent -- noop */
+	exit(0);
+}
 
 #ifdef _WIN32
 setenv(vname, value)		/* set an environment variable */