Todo item:

New option to start threaded wmJobs, with flag WM_JOB_SUSPEND.
This makes the job wait 1 timer step before running. 

Used now for Material Icon render renders, which makes the
big preview to be always rendered first while using UI.

1 files changed, 28 insertions, 20 deletions

diff --git a/source/blender/windowmanager/intern/wm_jobs.c b/source/blender/windowmanager/intern/wm_jobs.c
index b8dfae63b4d..591ed5c33b5 100644
--- a/source/blender/windowmanager/intern/wm_jobs.c
+++ b/source/blender/windowmanager/intern/wm_jobs.c
@@ -247,33 +247,40 @@ static void wm_jobs_test_suspend_stop(wmWindowManager *wm, wmJob *test)
 	wmJob *steve;
 	int suspend= 0;
 	
-	for(steve= wm->jobs.first; steve; steve= steve->next) {
-		/* obvious case, no test needed */
-		if(steve==test || !steve->running) continue;
-		
-		/* if new job is not render, then check for same startjob */
-		if(0==(test->flag & WM_JOB_EXCL_RENDER)) 
-			if(steve->startjob!=test->startjob)
-				continue;
-		
-		/* if new job is render, any render job should be stopped */
-		if(test->flag & WM_JOB_EXCL_RENDER)
-		   if(0==(steve->flag & WM_JOB_EXCL_RENDER)) 
-			   continue;
-
+	/* job added with suspend flag, we wait 1 timer step before activating it */
+	if(test->flag & WM_JOB_SUSPEND) {
 		suspend= 1;
+		test->flag &= ~WM_JOB_SUSPEND;
+	}
+	else {
+		/* check other jobs */
+		for(steve= wm->jobs.first; steve; steve= steve->next) {
+			/* obvious case, no test needed */
+			if(steve==test || !steve->running) continue;
+			
+			/* if new job is not render, then check for same startjob */
+			if(0==(test->flag & WM_JOB_EXCL_RENDER)) 
+				if(steve->startjob!=test->startjob)
+					continue;
+			
+			/* if new job is render, any render job should be stopped */
+			if(test->flag & WM_JOB_EXCL_RENDER)
+			   if(0==(steve->flag & WM_JOB_EXCL_RENDER)) 
+				   continue;
 
-		/* if this job has higher priority, stop others */
-		if(test->flag & WM_JOB_PRIORITY) {
-			steve->stop= 1;
-			// printf("job stopped: %s\n", steve->name);
+			suspend= 1;
+
+			/* if this job has higher priority, stop others */
+			if(test->flag & WM_JOB_PRIORITY) {
+				steve->stop= 1;
+				// printf("job stopped: %s\n", steve->name);
+			}
 		}
 	}
-
+	
 	/* possible suspend ourselfs, waiting for other jobs, or de-suspend */
 	test->suspended= suspend;
 	// if(suspend) printf("job suspended: %s\n", test->name);
-
 }
 
 /* if job running, the same owner gave it a new job */
@@ -286,6 +293,7 @@ void WM_jobs_start(wmWindowManager *wm, wmJob *steve)
 		// printf("job started a running job, ending... %s\n", steve->name);
 	}
 	else {
+		
 		if(steve->customdata && steve->startjob) {
 			
 			wm_jobs_test_suspend_stop(wm, steve);