| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: raypwin.c,v 2.4 2008/02/13 01:06:10 greg Exp $"; |
| 3 |
#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 |
/***** XXX CURRENTLY, THIS IS JUST A COLLECTION OF IMPOTENT STUBS XXX *****/ |
| 17 |
|
| 18 |
#include "ray.h" |
| 19 |
|
| 20 |
int ray_pnprocs = 0; /* number of child processes */ |
| 21 |
int ray_pnidle = 0; /* number of idle children */ |
| 22 |
|
| 23 |
static RAY queued_ray; |
| 24 |
|
| 25 |
extern void |
| 26 |
ray_pinit( /* initialize ray-tracing processes */ |
| 27 |
char *otnm, |
| 28 |
int nproc |
| 29 |
) |
| 30 |
{ |
| 31 |
ray_pdone(0); |
| 32 |
ray_init(otnm); |
| 33 |
ray_popen(nproc); |
| 34 |
} |
| 35 |
|
| 36 |
|
| 37 |
extern void |
| 38 |
ray_psend( /* add a ray to our send queue */ |
| 39 |
RAY *r |
| 40 |
) |
| 41 |
{ |
| 42 |
if (r == NULL) |
| 43 |
return; |
| 44 |
if (ray_pnidle <= 0) |
| 45 |
error(INTERNAL, "illegal call to ray_psend"); |
| 46 |
queued_ray = *r; |
| 47 |
ray_pnidle = 0; |
| 48 |
} |
| 49 |
|
| 50 |
|
| 51 |
extern int |
| 52 |
ray_pqueue( /* queue a ray for computation */ |
| 53 |
RAY *r |
| 54 |
) |
| 55 |
{ |
| 56 |
if (r == NULL) |
| 57 |
return(0); |
| 58 |
if (ray_pnidle <= 0) { |
| 59 |
RAY new_ray = *r; |
| 60 |
*r = queued_ray; |
| 61 |
queued_ray = new_ray; |
| 62 |
} |
| 63 |
samplendx++; |
| 64 |
rayvalue(r); |
| 65 |
return(1); |
| 66 |
} |
| 67 |
|
| 68 |
|
| 69 |
extern int |
| 70 |
ray_presult( /* check for a completed ray */ |
| 71 |
RAY *r, |
| 72 |
int poll |
| 73 |
) |
| 74 |
{ |
| 75 |
if (r == NULL) |
| 76 |
return(0); |
| 77 |
if (ray_pnidle <= 0) { |
| 78 |
*r = queued_ray; |
| 79 |
samplendx++; |
| 80 |
rayvalue(r); |
| 81 |
ray_pnidle = 1; |
| 82 |
return(1); |
| 83 |
} |
| 84 |
return(0); |
| 85 |
} |
| 86 |
|
| 87 |
|
| 88 |
extern void |
| 89 |
ray_pdone( /* reap children and free data */ |
| 90 |
int freall |
| 91 |
) |
| 92 |
{ |
| 93 |
ray_done(freall); |
| 94 |
ray_pnprocs = ray_pnidle = 0; |
| 95 |
} |
| 96 |
|
| 97 |
|
| 98 |
extern void |
| 99 |
ray_popen( /* open the specified # processes */ |
| 100 |
int nadd |
| 101 |
) |
| 102 |
{ |
| 103 |
if (ray_pnprocs + nadd > 1) { |
| 104 |
error(WARNING, "Only single process supported"); |
| 105 |
nadd = 1 - ray_pnprocs; |
| 106 |
} |
| 107 |
ray_pnprocs += nadd; |
| 108 |
ray_pnidle += nadd; |
| 109 |
} |
| 110 |
|
| 111 |
|
| 112 |
extern void |
| 113 |
ray_pclose( /* close one or more child processes */ |
| 114 |
int nsub |
| 115 |
) |
| 116 |
{ |
| 117 |
if (nsub > ray_pnprocs) |
| 118 |
nsub = ray_pnprocs; |
| 119 |
ray_pnprocs -= nsub; |
| 120 |
if ((ray_pnidle -= nsub) < 0) |
| 121 |
ray_pnidle = 0; |
| 122 |
} |
| 123 |
|
| 124 |
|
| 125 |
void |
| 126 |
quit(ec) /* make sure exit is called */ |
| 127 |
int ec; |
| 128 |
{ |
| 129 |
exit(ec); |
| 130 |
} |
