From 711c18c2301d1bea35cac1144080a94e6b89be27 Mon Sep 17 00:00:00 2001
From: Jeremy Allison <jra@samba.org>
Date: Wed, 21 Dec 2011 20:38:32 -0800
Subject: [PATCH] Change the signature of pthreadpool_finished_job() to return
 0 on success, errno on fail and return the jobid in a separate variable.

I need this fix for my vfs_aio_pthread.c module.

Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Thu Dec 22 12:12:33 CET 2011 on sn-devel-104
---
 source3/lib/fncall.c                  |  3 +--
 source3/lib/pthreadpool/pthreadpool.c |  9 +++++----
 source3/lib/pthreadpool/pthreadpool.h |  5 +++--
 source3/lib/pthreadpool/tests.c       | 18 ++++++++++--------
 4 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/source3/lib/fncall.c b/source3/lib/fncall.c
index 6e6b7c9250..79bf8260d9 100644
--- a/source3/lib/fncall.c
+++ b/source3/lib/fncall.c
@@ -280,8 +280,7 @@ static void fncall_handler(struct tevent_context *ev, struct tevent_fd *fde,
 	int i, num_pending;
 	int job_id;
 
-	job_id = pthreadpool_finished_job(ctx->pool);
-	if (job_id <= 0) {
+	if (pthreadpool_finished_job(ctx->pool, &job_id) != 0) {
 		return;
 	}
 
diff --git a/source3/lib/pthreadpool/pthreadpool.c b/source3/lib/pthreadpool/pthreadpool.c
index c916dc0f8d..fffbd050df 100644
--- a/source3/lib/pthreadpool/pthreadpool.c
+++ b/source3/lib/pthreadpool/pthreadpool.c
@@ -285,16 +285,16 @@ static void pthreadpool_join_children(struct pthreadpool *pool)
  * Fetch a finished job number from the signal pipe
  */
 
-int pthreadpool_finished_job(struct pthreadpool *pool)
+int pthreadpool_finished_job(struct pthreadpool *pool, int *jobid)
 {
-	int result;
+	int ret_jobid;
 	ssize_t nread;
 
 	nread = -1;
 	errno = EINTR;
 
 	while ((nread == -1) && (errno == EINTR)) {
-		nread = read(pool->sig_pipe[0], &result, sizeof(int));
+		nread = read(pool->sig_pipe[0], &ret_jobid, sizeof(int));
 	}
 	if (nread == -1) {
 		return errno;
@@ -302,7 +302,8 @@ int pthreadpool_finished_job(struct pthreadpool *pool)
 	if (nread != sizeof(int)) {
 		return EINVAL;
 	}
-	return result;
+	*jobid = ret_jobid;
+	return 0;
 }
 
 /*
diff --git a/source3/lib/pthreadpool/pthreadpool.h b/source3/lib/pthreadpool/pthreadpool.h
index 79704ea385..0fde3c811b 100644
--- a/source3/lib/pthreadpool/pthreadpool.h
+++ b/source3/lib/pthreadpool/pthreadpool.h
@@ -90,8 +90,9 @@ int pthreadpool_signal_fd(struct pthreadpool *pool);
  * pthreadpool_signal_fd() is readable.
  *
  * @param[in]	pool		The pool to query for finished jobs
- * @return			The job_id of the finished job
+ * @param[out]  pjobid		The job_id of the finished job
+ * @return			success: 0, failure: errno
  */
-int pthreadpool_finished_job(struct pthreadpool *pool);
+int pthreadpool_finished_job(struct pthreadpool *pool, int *jobid);
 
 #endif
diff --git a/source3/lib/pthreadpool/tests.c b/source3/lib/pthreadpool/tests.c
index 667ee01784..95d37b6f17 100644
--- a/source3/lib/pthreadpool/tests.c
+++ b/source3/lib/pthreadpool/tests.c
@@ -68,12 +68,13 @@ static int test_jobs(int num_threads, int num_jobs)
 	}
 
 	for (i=0; i<num_jobs; i++) {
-		ret = pthreadpool_finished_job(p);
-		if ((ret < 0) || (ret >= num_jobs)) {
-			fprintf(stderr, "invalid job number %d\n", ret);
+		int jobid = -1;
+		ret = pthreadpool_finished_job(p, &jobid);
+		if ((ret != 0) || (jobid >= num_jobs)) {
+			fprintf(stderr, "invalid job number %d\n", jobid);
 			return -1;
 		}
-		finished[ret] += 1;
+		finished[jobid] += 1;
 	}
 
 	for (i=0; i<num_jobs; i++) {
@@ -275,18 +276,19 @@ static int test_threaded_addjob(int num_pools, int num_threads, int poolsize,
 		}
 
 		for (j=0; j<num_pools; j++) {
+			int jobid = -1;
 
 			if ((pfds[j].revents & (POLLIN|POLLHUP)) == 0) {
 				continue;
 			}
 
-			ret = pthreadpool_finished_job(pools[j]);
-			if ((ret < 0) || (ret >= num_jobs * num_threads)) {
+			ret = pthreadpool_finished_job(pools[j], &jobid);
+			if ((ret != 0) || (jobid >= num_jobs * num_threads)) {
 				fprintf(stderr, "invalid job number %d\n",
-					ret);
+					jobid);
 				return -1;
 			}
-			finished[ret] += 1;
+			finished[jobid] += 1;
 			received += 1;
 		}
 	}
-- 
2.34.1