lib: Add pthreadpool_pipe

First step to separate the signalling mechanism from the core pthreadpool code.
A later patch will add a pthreadpool that directly indicates job completion via
tevent_threaded_schedule_immediate.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

source3/lib/pthreadpool/pthreadpool_pipe.c

@@ -0,0 +1,84 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * threadpool implementation based on pthreads
+ * Copyright (C) Volker Lendecke 2009,2011
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "replace.h"
+#include "system/filesys.h"
+#include "pthreadpool_pipe.h"
+#include "pthreadpool.h"
+
+struct pthreadpool_pipe {
+	struct pthreadpool *pool;
+};
+
+int pthreadpool_pipe_init(unsigned max_threads,
+			  struct pthreadpool_pipe **presult)
+{
+	struct pthreadpool_pipe *p;
+	int ret;
+
+	p = malloc(sizeof(struct pthreadpool_pipe));
+	if (p == NULL) {
+		return ENOMEM;
+	}
+
+	ret = pthreadpool_init(max_threads, &p->pool);
+	if (ret != 0) {
+		free(p);
+		return ret;
+	}
+
+	*presult = p;
+	return 0;
+}
+
+int pthreadpool_pipe_destroy(struct pthreadpool_pipe *pool)
+{
+	int ret;
+
+	ret = pthreadpool_destroy(pool->pool);
+	if (ret != 0) {
+		return ret;
+	}
+	free(pool);
+	return 0;
+}
+
+int pthreadpool_pipe_add_job(struct pthreadpool_pipe *pool, int job_id,
+			     void (*fn)(void *private_data),
+			     void *private_data)
+{
+	int ret;
+	ret = pthreadpool_add_job(pool->pool, job_id, fn, private_data);
+	return ret;
+}
+
+int pthreadpool_pipe_signal_fd(struct pthreadpool_pipe *pool)
+{
+	int fd;
+	fd = pthreadpool_signal_fd(pool->pool);
+	return fd;
+}
+
+int pthreadpool_pipe_finished_jobs(struct pthreadpool_pipe *pool, int *jobids,
+				   unsigned num_jobids)
+{
+	int ret;
+	ret = pthreadpool_finished_jobs(pool->pool, jobids, num_jobids);
+	return ret;
+}

source3/lib/pthreadpool/pthreadpool_pipe.h

@@ -0,0 +1,39 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * threadpool implementation based on pthreads
+ * Copyright (C) Volker Lendecke 2009,2011
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __PTHREADPOOL_PIPE_H__
+#define __PTHREADPOOL_PIPE_H__
+
+struct pthreadpool_pipe;
+
+int pthreadpool_pipe_init(unsigned max_threads,
+			  struct pthreadpool_pipe **presult);
+
+int pthreadpool_pipe_destroy(struct pthreadpool_pipe *pool);
+
+int pthreadpool_pipe_add_job(struct pthreadpool_pipe *pool, int job_id,
+			     void (*fn)(void *private_data),
+			     void *private_data);
+
+int pthreadpool_pipe_signal_fd(struct pthreadpool_pipe *pool);
+
+int pthreadpool_pipe_finished_jobs(struct pthreadpool_pipe *pool, int *jobids,
+				   unsigned num_jobids);
+
+#endif

source3/lib/pthreadpool/wscript_build

@@ -2,11 +2,11 @@
 
 if bld.env.WITH_PTHREADPOOL:
     bld.SAMBA3_SUBSYSTEM('PTHREADPOOL',
-                         source='pthreadpool.c',
+                         source='pthreadpool.c pthreadpool_pipe.c',
                          deps='pthread rt replace')
 else:
     bld.SAMBA3_SUBSYSTEM('PTHREADPOOL',
-                         source='pthreadpool_sync.c',
+                         source='pthreadpool_sync.c pthreadpool_pipe.c',
                          deps='replace')