src/rt/raypwin.c

#ifndef lint
static const char RCSid[] = "$Id: raypwin.c,v 2.5 2008/04/17 18:48:09 greg Exp $";
#endif
/*
 *  raypwin.c - interface for parallel rendering using Radiance (Windows ver)
 *
 *  External symbols declared in ray.h
 */

#include "copyright.h"

/*
 * See raypcalls.c for an explanation of these routines.
 */

/***** XXX CURRENTLY, THIS IS JUST A COLLECTION OF IMPOTENT STUBS XXX *****/

#include  "ray.h"

int             ray_pnprocs = 0;        /* number of child processes */
int             ray_pnidle = 0;         /* number of idle children */

static RAY      queued_ray;

void
ray_pinit(              /* initialize ray-tracing processes */
        char    *otnm,
        int     nproc
)
{
        ray_pdone(0);
        ray_init(otnm);
        ray_popen(nproc);
}


int
ray_psend(                      /* add a ray to our send queue */
        RAY     *r
)
{
        if (r == NULL)
                return(0);
        if (ray_pnidle <= 0)
                return(0);
        queued_ray = *r;
        ray_pnidle = 0;
        return(1);
}


int
ray_pqueue(                     /* queue a ray for computation */
        RAY     *r
)
{
        if (r == NULL)
                return(0);
        if (ray_pnidle <= 0) {
                RAY     new_ray = *r;
                *r = queued_ray;
                queued_ray = new_ray;
        }
        samplendx++;
        rayvalue(r);
        return(1);
}


int
ray_presult(            /* check for a completed ray */
        RAY     *r,
        int     poll
)
{
        if (r == NULL)
                return(0);
        if (ray_pnidle <= 0) {
                *r = queued_ray;
                samplendx++;
                rayvalue(r);
                ray_pnidle = 1;
                return(1);
        }
        return(0);
}


void
ray_pdone(              /* reap children and free data */
        int     freall
)
{
        ray_done(freall);
        ray_pnprocs = ray_pnidle = 0;
}


void
ray_popen(                      /* open the specified # processes */
        int     nadd
)
{
        if (ray_pnprocs + nadd > 1) {
                error(WARNING, "only single process supported");
                nadd = 1 - ray_pnprocs;
        }
        ray_pnprocs += nadd;
        ray_pnidle += nadd;
}


void
ray_pclose(             /* close one or more child processes */
        int     nsub
)
{
        if (nsub > ray_pnprocs)
                nsub = ray_pnprocs;
        ray_pnprocs -= nsub;
        if ((ray_pnidle -= nsub) < 0)
                ray_pnidle = 0;
}


void
quit(ec)                        /* make sure exit is called */
int     ec;
{
        exit(ec);
}
Revision:	2.6
Committed:	Tue Dec 15 19:13:45 2009 UTC (14 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R0
Changes since 2.5:	+12 -11 lines
Log Message:	Update to return type of ray_psend()
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.6	static const char RCSid[] = "$Id: raypwin.c,v 2.5 2008/04/17 18:48:09 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* raypwin.c - interface for parallel rendering using Radiance (Windows ver)
6			*
7			* External symbols declared in ray.h
8			*/
9
10			#include "copyright.h"
11
12			/*
13			* See raypcalls.c for an explanation of these routines.
14			*/
15
16	greg	2.2	/*** XXX CURRENTLY, THIS IS JUST A COLLECTION OF IMPOTENT STUBS XXX ***/
17	greg	2.1
18			#include "ray.h"
19
20	greg	2.2	int ray_pnprocs = 0; /* number of child processes */
21			int ray_pnidle = 0; /* number of idle children */
22
23			static RAY queued_ray;
24	greg	2.1
25	greg	2.6	void
26	greg	2.1	ray_pinit( /* initialize ray-tracing processes */
27			char *otnm,
28			int nproc
29			)
30			{
31	greg	2.2	ray_pdone(0);
32			ray_init(otnm);
33			ray_popen(nproc);
34	greg	2.1	}
35
36
37	greg	2.6	int
38	greg	2.1	ray_psend( /* add a ray to our send queue */
39			RAY *r
40			)
41			{
42	greg	2.2	if (r == NULL)
43	greg	2.6	return(0);
44	greg	2.2	if (ray_pnidle <= 0)
45	greg	2.6	return(0);
46	greg	2.2	queued_ray = *r;
47			ray_pnidle = 0;
48	greg	2.6	return(1);
49	greg	2.1	}
50
51
52	greg	2.6	int
53	greg	2.1	ray_pqueue( /* queue a ray for computation */
54			RAY *r
55			)
56			{
57	greg	2.2	if (r == NULL)
58			return(0);
59	greg	2.5	if (ray_pnidle <= 0) {
60			RAY new_ray = *r;
61			*r = queued_ray;
62			queued_ray = new_ray;
63			}
64	greg	2.4	samplendx++;
65			rayvalue(r);
66	greg	2.2	return(1);
67	greg	2.1	}
68
69
70	greg	2.6	int
71	greg	2.1	ray_presult( /* check for a completed ray */
72			RAY *r,
73			int poll
74			)
75			{
76	greg	2.2	if (r == NULL)
77			return(0);
78	greg	2.3	if (ray_pnidle <= 0) {
79	greg	2.5	*r = queued_ray;
80	greg	2.4	samplendx++;
81			rayvalue(r);
82	greg	2.2	ray_pnidle = 1;
83			return(1);
84			}
85			return(0);
86	greg	2.1	}
87
88
89	greg	2.6	void
90	greg	2.1	ray_pdone( /* reap children and free data */
91			int freall
92			)
93			{
94	greg	2.2	ray_done(freall);
95			ray_pnprocs = ray_pnidle = 0;
96	greg	2.1	}
97
98
99	greg	2.6	void
100	greg	2.1	ray_popen( /* open the specified # processes */
101			int nadd
102			)
103			{
104	greg	2.2	if (ray_pnprocs + nadd > 1) {
105	greg	2.6	error(WARNING, "only single process supported");
106	greg	2.2	nadd = 1 - ray_pnprocs;
107			}
108			ray_pnprocs += nadd;
109			ray_pnidle += nadd;
110	greg	2.1	}
111
112
113	greg	2.6	void
114	greg	2.1	ray_pclose( /* close one or more child processes */
115			int nsub
116			)
117			{
118	greg	2.2	if (nsub > ray_pnprocs)
119			nsub = ray_pnprocs;
120			ray_pnprocs -= nsub;
121			if ((ray_pnidle -= nsub) < 0)
122			ray_pnidle = 0;
123	greg	2.1	}
124
125
126			void
127			quit(ec) /* make sure exit is called */
128			int ec;
129			{
130			exit(ec);
131			}