Revision: 54974
http://brlcad.svn.sourceforge.net/brlcad/?rev=54974&view=rev
Author: brlcad
Date: 2013-03-29 16:46:29 +0000 (Fri, 29 Mar 2013)
Log Message:
-----------
take a stab at implementing thread affinity for windows as well (hah, in
advance of windows threading). using bu_parallel_id() to set the cpu number.
earned fewest line count badge (albeit untested)
Modified Paths:
--------------
brlcad/trunk/src/libbu/affinity.c
Modified: brlcad/trunk/src/libbu/affinity.c
===================================================================
--- brlcad/trunk/src/libbu/affinity.c 2013-03-29 16:45:20 UTC (rev 54973)
+++ brlcad/trunk/src/libbu/affinity.c 2013-03-29 16:46:29 UTC (rev 54974)
@@ -45,6 +45,10 @@
# include <mach/mach.h>
#endif
+#ifdef HAVE_WINDOWS_H
+# include <windows.h>
+#endif
+
#include "bu.h"
@@ -56,7 +60,7 @@
/* Linux and BSD pthread affinity */
pthread_t curr_thread = pthread_self(); /* Get current thread */
- int cpulim = bu_avail_cpus(); /* Max number of CPUs available
for the process */
+ int ncpu = bu_avail_cpus(); /* Max number of CPUs
available for the process */
int status; /* Status of thread
setting/getting */
int cpu = 0; /* Default CPU number */
int j; /* Variable for iteration. */
@@ -67,17 +71,15 @@
cpuset_t set_of_cpus;
#endif
-
CPU_ZERO(&set_of_cpus);
- for (j = 0; j < cpulim; j++) {
+ for (j = 0; j < ncpu; j++) {
/* Set affinity mask to include CPUs 0 to max available CPU */
CPU_SET(j, &set_of_cpus);
}
/* Check current affinity mask assigned to thread */
status = pthread_getaffinity_np(curr_thread, sizeof(set_of_cpus),
&set_of_cpus);
-
if (status != 0) {
/* Error in getting affinity mask */
return -1;
@@ -98,7 +100,6 @@
/* set affinity mask of current thread */
status = pthread_setaffinity_np(curr_thread, sizeof(set_of_cpus),
&set_of_cpus);
-
if (status != 0) {
/* Error in setting affinity mask */
return -1;
@@ -134,6 +135,12 @@
return 0;
+#elif defined(HAVE_WINDOWS_H)
+ BOOL ret = SetThreadAffinityMask(GetCurrentThread(), 1 <<
bu_parallel_id());
+ if (ret == 0)
+ return -1;
+
+ return 0;
#else
/* don't know how to set thread affinity on this platform */
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